PureBasic Interface to OpenCV
Re: PureBasic Interface to OpenCV
Ok, thank you both !
Re: PureBasic Interface to OpenCV
I used OpenCV32 to add text as an image to a jpg image and that worked well, ( it was fun ).
So I figured I would create a sample adding a different font as a PB image. When I did it with a jpeg it was just adding transparent text and the text was white so no big deal. For my sample I added color to the text and that didn't look good so I figured I have to create a mask, inverse the mask, merge the mask with ROI then add image to result but no joy.
This sample code reads the first 60 frames of ball.mp4 which is located in the /binaries/video
writes outtext.avi to /Videos
here is my test code in case someone wants to give it a go. ( it has a lot of comments of things I have tried )
[edit] My keyboard is acting up. I cannot even do a copy and paste
deleted double paste Oct 16,2017. thank you @AAT
Norm.
So I figured I would create a sample adding a different font as a PB image. When I did it with a jpeg it was just adding transparent text and the text was white so no big deal. For my sample I added color to the text and that didn't look good so I figured I have to create a mask, inverse the mask, merge the mask with ROI then add image to result but no joy.
This sample code reads the first 60 frames of ball.mp4 which is located in the /binaries/video
writes outtext.avi to /Videos
here is my test code in case someone wants to give it a go. ( it has a lot of comments of things I have tried )
Code: Select all
;OpenCV32
UseJPEGImageDecoder()
UseJPEGImageEncoder()
IncludeFile "includes/cv_functions.pbi"
EnableExplicit
Global PBfont=LoadFont(#PB_Any ,"Arial",18,#PB_Font_HighQuality|#PB_Font_Bold )
Global *writer , *capture.CvCapture,*decode.IplImage,*image.IplImage,*convert.iplImage
Global video_W=360,Video_H=288,FPS=30
Define nCreate,cnt,movex,FrameCount.d
Procedure PBPutText(text.s="add image demo")
Protected img,w,h,*buffer,*mat.CvMat
img= CreateImage(#PB_Any, 100, 30,32)
If img And StartDrawing(ImageOutput(img))
DrawingFont(FontID(PBfont))
DrawingMode( #PB_2DDrawing_Transparent )
DrawText(5, 4, text,$00410000)
DrawText(1,1, text,$000C7CC5)
StopDrawing()
EndIf
If IsImage(img)
*buffer = EncodeImage(img, #PB_ImagePlugin_JPEG)
*mat = cvCreateMatHeader(ImageWidth(img), ImageHeight(img), CV_MAKETYPE(#CV_8U, 3))
cvSetData(*mat, *buffer, #CV_AUTOSTEP)
*decode = cvDecodeImage(*mat,#CV_LOAD_IMAGE_COLOR); #CV_LOAD_IMAGE_COLOR)
FreeImage(img)
EndIf
EndProcedure
PBPutText("JHPJHP")
*writer = cvCreateVideoWriter("/videos/outtext.avi", CV_FOURCC("D", "I", "V", "X"), FPS,video_W,video_H, #True); 360,300,#True);960,720, #True)
Repeat
nCreate + 1
*capture = cvCreateFileCapture("binaries/videos/ball.mp4")
Until nCreate = 5 Or *capture
FrameCount = cvGetCaptureProperty(*capture, #CV_CAP_PROP_FRAME_COUNT)
movex=1
Repeat
*image = cvQueryFrame(*capture)
If *image
cvSetImageROI(*image,movex,10,100,20) ; Location of moving text
Define *iroi.IplImage = cvCreateImage(100, 20, *image\depth, *image\nChannels) ;section of image to transform
cvcopy(*image, *iroi,#Null)
*convert = cvCreateImage(100, 20, *decode\depth, *decode\nChannels) ; in case the image I create is a different size
cvResize(*decode, *convert, #CV_INTER_AREA)
;cvcvtcolor(*decode,*convert,#CV_RGBA2BGR,1) ;I wish It was as simple as changing color
Define *tgray.IplImage = cvCreateImage(100, 20, #IPL_DEPTH_8U, 1) ; create temp gray image
cvCvtColor(*convert, *tgray, #CV_BGR2GRAY,1) ; get our letters turn them gray 1 channel
Define *gray.IplImage = cvCreateImage(100, 20, #IPL_DEPTH_8U, 3) ; go back to 3 channels
cvThreshold(*tgray, *tgray, 50, 255, #CV_THRESH_BINARY ) ; mask
cvCvtColor(*tgray, *gray, #CV_GRAY2BGR,1) ; back to 3 channel
Define *notgray.IplImage = cvCreateImage(100, 20, #IPL_DEPTH_8U, 3) ; I want to not the LETTERS so that iroi displays fine
cvnot(*gray,*notgray)
;cvand(*iroi,*notgray,*iroi, #Null) ; and notgray to create mask
;cvand(*convert,*iroi,*convert,#Null) add mask to original LETTERS
cvAdd(*image,*convert,*image,#Null)
cvResetImageROI(*image)
cvWriteFrame(*writer, *image)
Debug cnt
Else
Break
EndIf
cnt+1
movex +5
If movex > 250 : movex=250:EndIf
Until cnt> 60
;Until cnt>FrameCount
cvReleaseVideoWriter(@*writer)
![Shocked :shock:](./images/smilies/icon_eek.gif)
deleted double paste Oct 16,2017. thank you @AAT
Norm.
Last edited by normeus on Mon Oct 16, 2017 4:09 pm, edited 1 time in total.
google Translate;Makes my jokes fall flat- Fait mes blagues tombent à plat- Machte meine Witze verpuffen- Eh cumpari ci vo sunari
Re: PureBasic Interface to OpenCV
Hi normeus,
Sorry, I am not sure I correctly understood your goal, was it to add text to a video using any font?
The simple solution is to use the Function cvPutText to directly write to each video frame; see cv_video_writeframe.pb.
This can be combined with the logic provided by AAT in the example cv_pb_font.pb, where PureBasic is combined with OpenCV to draw text onto an image.
NB*: I really like your example demonstrating the "Ken Burnes effect", and when time permits will include it into the OpenCV packages.
Sorry, I am not sure I correctly understood your goal, was it to add text to a video using any font?
The simple solution is to use the Function cvPutText to directly write to each video frame; see cv_video_writeframe.pb.
This can be combined with the logic provided by AAT in the example cv_pb_font.pb, where PureBasic is combined with OpenCV to draw text onto an image.
NB*: I really like your example demonstrating the "Ken Burnes effect", and when time permits will include it into the OpenCV packages.
Re: PureBasic Interface to OpenCV
JHPJHP,
actually my trouble began with me wanting to use white text on an image. Like you can with cvputText().
I was not able to do it.
I should have known that you had a working example of what I was trying to do.
My original code was in C++ with another library so I decided it would be easier to do it in PureBasic using an image.
I will try to at least read the names of the examples. Examples are there for a reason!!!
@AAT, Sorry about the confusion, about the example you had already created.
Thank you.
Norm.
actually my trouble began with me wanting to use white text on an image. Like you can with cvputText().
I was not able to do it.
I should have known that you had a working example of what I was trying to do.
My original code was in C++ with another library so I decided it would be easier to do it in PureBasic using an image.
I will try to at least read the names of the examples. Examples are there for a reason!!!
@AAT, Sorry about the confusion, about the example you had already created.
Thank you.
Norm.
google Translate;Makes my jokes fall flat- Fait mes blagues tombent à plat- Machte meine Witze verpuffen- Eh cumpari ci vo sunari
Re: PureBasic Interface to OpenCV
Sometimes I think it would be useful to make a guide to the examples.normeus wrote:I will try to at least read the names of the examples. Examples are there for a reason!!!
Sometimes I think that reading a few lines of "#CV_DESCRIPTION =..." in the example is not very difficult, it's even possible to write a script that will make a general description for all examples from this lines.
Sometimes...
Re: PureBasic Interface to OpenCV
So the problem was that I wanted to use white text with a black shadow just like cvputText().
On the library I was using I had to turn to gray, mask the inverse, etc... So I came to PB with that mindset.
On the cv_pb_font.pb example, I fixed the colors to black and white and created a second image.
Had to use "DrawingMode(#PB_2DDrawing_Transparent|#PB_2DDrawing_Gradient)" to create text.
Then cvSub shadow then cvAdd white font.
Still kicking myself for not looking at the examples
[edit] Adding blur as recommended by AAT in the comment below. It looks a lot better
Norm.
On the library I was using I had to turn to gray, mask the inverse, etc... So I came to PB with that mindset.
On the cv_pb_font.pb example, I fixed the colors to black and white and created a second image.
Had to use "DrawingMode(#PB_2DDrawing_Transparent|#PB_2DDrawing_Gradient)" to create text.
Then cvSub shadow then cvAdd white font.
Still kicking myself for not looking at the examples
[edit] Adding blur as recommended by AAT in the comment below. It looks a lot better
Code: Select all
IncludeFile "includes/cv_functions.pbi"
Global openCV, *save.IplImage, exitCV, lpPrevWndFunc
#CV_WINDOW_NAME = "PureBasic Interface to OpenCV"
#CV_DESCRIPTION = "Draw text using PureBasic commands with any font onto an OpenCV generated image." + #LF$ + #LF$ +
"SPACEBAR " + #TAB$ + ": Change to another font."
Procedure WindowCallback(hWnd, uMsg, wParam, lParam)
Select uMsg
Case #WM_COMMAND
Select wParam
Case 1
openCV = #True
keybd_event_(#VK_ESCAPE, 0, 0, 0)
Case 2
FileName.s = SaveCVImage()
If FileName
params.CvSaveData
Select LCase(GetExtensionPart(FileName))
Case "bmp", "dib"
Case "jpeg", "jpg", "jpe"
params\paramId = #CV_IMWRITE_JPEG_QUALITY
params\paramValue = 95
Case "jp2"
Case "png"
params\paramId = #CV_IMWRITE_PNG_COMPRESSION
params\paramValue = 3
Case "ppm", "pgm", "pbm"
params\paramId = #CV_IMWRITE_PXM_BINARY
params\paramValue = 1
Case "sr", "ras"
Case "tiff", "tif"
Default
Select SelectedFilePattern()
Case 0
FileName + ".bmp"
Case 1
FileName + ".jpg"
params\paramId = #CV_IMWRITE_JPEG_QUALITY
params\paramValue = 95
Case 2
FileName + ".jp2"
Case 3
FileName + ".png"
params\paramId = #CV_IMWRITE_PNG_COMPRESSION
params\paramValue = 3
Case 4
FileName + ".ppm"
params\paramId = #CV_IMWRITE_PXM_BINARY
params\paramValue = 1
Case 5
FileName + ".sr"
Case 6
FileName + ".tiff"
EndSelect
EndSelect
cvSaveImage(FileName, *save, @params)
EndIf
Case 10
keybd_event_(#VK_ESCAPE, 0, 0, 0)
EndSelect
Case #WM_DESTROY
exitCV = #True
EndSelect
ProcedureReturn CallWindowProc_(lpPrevWndFunc, hWnd, uMsg, wParam, lParam)
EndProcedure
Procedure CvMouseCallback(event, x.l, y.l, flags, *param.CvUserData)
Select event
Case #CV_EVENT_RBUTTONDOWN
*save = *param\Pointer1
DisplayPopupMenu(0, *param\Value)
EndSelect
EndProcedure
Procedure OpenCV(ImageFile.s)
If FileSize(ImageFile) > 0
cvNamedWindow(#CV_WINDOW_NAME, #CV_WINDOW_AUTOSIZE)
window_handle = cvGetWindowHandle(#CV_WINDOW_NAME)
*window_name = cvGetWindowName(window_handle)
lpPrevWndFunc = SetWindowLongPtr_(window_handle, #GWL_WNDPROC, @WindowCallback())
If CreatePopupImageMenu(0, #PB_Menu_ModernLook)
MenuItem(1, "Open")
MenuBar()
MenuItem(2, "Save")
MenuBar()
MenuItem(10, "Exit")
EndIf
hWnd = GetParent_(window_handle)
iconCV = LoadImage_(GetModuleHandle_(0), @"icons/opencv.ico", #IMAGE_ICON, 35, 32, #LR_LOADFROMFILE)
SendMessage_(hWnd, #WM_SETICON, 0, iconCV)
wStyle = GetWindowLongPtr_(hWnd, #GWL_STYLE)
SetWindowLongPtr_(hWnd, #GWL_STYLE, wStyle & ~(#WS_MAXIMIZEBOX | #WS_MINIMIZEBOX | #WS_SIZEBOX))
*image.IplImage = cvLoadImage(ImageFile, #CV_LOAD_IMAGE_ANYDEPTH | #CV_LOAD_IMAGE_ANYCOLOR)
dtWidth = DesktopWidth(0) : dtHeight = DesktopHeight(0)
If *image\width >= dtWidth - 100 Or *image\height >= dtHeight - 100
iWidth = dtWidth - 100
iRatio1.d = iWidth / *image\width
iHeight = dtHeight - 100
iRatio2.d = iHeight / *image\height
If iRatio1 < iRatio2
iWidth = *image\width * iRatio1
iHeight = *image\height * iRatio1
Else
iWidth = *image\width * iRatio2
iHeight = *image\height * iRatio2
EndIf
cvResizeWindow(#CV_WINDOW_NAME, iWidth, iHeight)
*resize.IplImage = cvCreateImage(iWidth, iHeight, #IPL_DEPTH_8U, *image\nChannels)
cvResize(*image, *resize, #CV_INTER_AREA)
Else
cvResizeWindow(#CV_WINDOW_NAME, *image\width, *image\height)
*resize.IplImage = cvCloneImage(*image)
EndIf
cvMoveWindow(#CV_WINDOW_NAME, 20, 20)
ToolTip(window_handle, #CV_DESCRIPTION)
If *resize\width >= 640 And *resize\height >= 480 And *resize\nChannels = 3
*reset.IplImage = cvCloneImage(*resize)
*mask.IplImage = cvCreateImage(*resize\width, 80, #IPL_DEPTH_8U, *resize\nChannels)
*maskShadow.IplImage = cvCloneImage(*mask)
pbImage = CreateImage(#PB_Any, *mask\width, 80, 24, RGB(0, 0, 0))
pbImageShadow = CreateImage(#PB_Any, *mask\width, 80, 24, RGB(0, 0, 0))
fontName.s = "Comic Sans MS"
nFont = LoadFont(#PB_Any, fontName, 36, #PB_Font_HighQuality)
If *resize\width = 640 : fontX = 20 : Else : fontX = (*resize\width - 640) / 2 + 20 : EndIf : fontY = 5
font.CvFont : cvInitFont(@font, #CV_FONT_HERSHEY_COMPLEX | #CV_FONT_ITALIC, 1, 1, #Null, 1, #CV_AA)
*param.CvUserData = AllocateMemory(SizeOf(CvUserData))
*param\Pointer1 = *resize
*param\Value = window_handle
cvSetMouseCallback(*window_name, @CvMouseCallback(), *param)
Repeat
If *resize
cvSetZero(*mask)
cvSetZero(*maskShadow)
If StartDrawing(ImageOutput(pbImage))
DrawingFont(FontID(nFont))
DrawingMode(#PB_2DDrawing_Transparent|#PB_2DDrawing_Gradient )
DrawText(fontX, fontY, "Use any font with OpenCV!", $00000000)
*mask\imageData = DrawingBuffer()
StopDrawing()
EndIf
If StartDrawing(ImageOutput(pbImageShadow))
DrawingFont(FontID(nFont))
DrawingMode(#PB_2DDrawing_Transparent|#PB_2DDrawing_Gradient )
DrawText(fontX+5, fontY+5, "Use any font with OpenCV!", $FFFFFFFF) ; +5 to see the effect
*maskShadow\imageData = DrawingBuffer()
StopDrawing()
cvSmooth(*maskShadow, *maskShadow, #CV_GAUSSIAN, 13, 13, 0, 0) ; <----- blurring the shadow
EndIf
cvFlip(*mask, #Null, 0)
cvFlip(*maskShadow, #Null, 0)
cvSetImageROI(*resize, 0, *resize\height - 100, *resize\width, 80)
;cvAddS(*resize, 70, 70, 70, 0, *resize, 0)
cvSub(*resize, *maskShadow, *resize, 0)
cvAdd(*resize, *mask, *resize, 0)
cvResetImageROI(*resize)
cvPutText(*resize, fontName, 7, 30, @font, 0, 0, 0, 0)
cvPutText(*resize, fontName, 5, 28, @font, 255, 255, 255, 0)
cvShowImage(#CV_WINDOW_NAME, *resize)
keyPressed = cvWaitKey(0)
If keyPressed = 32
newfont = (newfont + 1) % 10
FreeFont(nFont)
Select newfont
Case 0
fontName = "Comic Sans MS"
fontY = 5
nFont = LoadFont(#PB_Any, "Comic Sans MS", 36, #PB_Font_HighQuality)
Case 1
fontName = "Arial"
fontY = 12
nFont = LoadFont(#PB_Any, "Arial", 37, #PB_Font_HighQuality)
Case 2
fontName = "Impact"
fontY = 8
nFont = LoadFont(#PB_Any, "Impact", 42, #PB_Font_HighQuality)
Case 3
fontName = "Times New Roman"
fontY = 10
nFont = LoadFont(#PB_Any, "Times New Roman", 40, #PB_Font_HighQuality)
Case 4
fontName = "Verdana"
fontY = 14
nFont = LoadFont(#PB_Any, "Verdana", 33, #PB_Font_HighQuality)
Case 5
fontName = "Courier New"
fontY = 22
nFont = LoadFont(#PB_Any, "Courier New", 30, #PB_Font_HighQuality)
Case 6
fontName = "Tahoma"
fontY = 8
nFont = LoadFont(#PB_Any, "Tahoma", 38, #PB_Font_HighQuality)
Case 7
fontName = "Modern"
fontY = 8
nFont = LoadFont(#PB_Any, "Modern", 44, #PB_Font_Bold | #PB_Font_HighQuality)
Case 8
fontName = "Georgia"
fontY = 14
nFont = LoadFont(#PB_Any, "Georgia", 37, #PB_Font_HighQuality)
Case 9
fontName = "Garamond"
fontY = 12
nFont = LoadFont(#PB_Any, "Garamond", 37, #PB_Font_HighQuality)
EndSelect
EndIf
cvReleaseImage(@*resize)
*resize = cvCloneImage(*reset)
EndIf
Until keyPressed = 27 Or exitCV
FreeMemory(*param)
FreeFont(nFont)
FreeImage(pbImage)
cvReleaseImage(@*mask)
cvReleaseImage(@*reset)
cvReleaseImage(@*resize)
cvReleaseImage(@*image)
cvDestroyAllWindows()
If openCV
openCV = #False
exitCV = #False
OpenCV(OpenCVImage())
EndIf
Else
If *resize\nChannels = 3
MessageRequester(#CV_WINDOW_NAME, ImageFile + #LF$ + #LF$ + "... does not meet the size requirements, please try another image.", #MB_ICONERROR)
Else
MessageRequester(#CV_WINDOW_NAME, ImageFile + #LF$ + #LF$ + "... does not meet the channel requirements, please try another image.", #MB_ICONERROR)
EndIf
cvReleaseImage(@*resize)
cvReleaseImage(@*image)
cvDestroyAllWindows()
exitCV = #False
OpenCV(OpenCVImage())
EndIf
EndIf
EndProcedure
ExamineDesktops()
OpenCV("images/colors.jpg")
Last edited by normeus on Sun Oct 22, 2017 9:50 pm, edited 1 time in total.
google Translate;Makes my jokes fall flat- Fait mes blagues tombent à plat- Machte meine Witze verpuffen- Eh cumpari ci vo sunari
Re: PureBasic Interface to OpenCV
Hi, normeus
Try to blur the shadow, it will see more realistic. Forexample
Try to blur the shadow, it will see more realistic. Forexample
Code: Select all
...
If StartDrawing(ImageOutput(pbImageShadow))
DrawingFont(FontID(nFont))
DrawingMode(#PB_2DDrawing_Transparent|#PB_2DDrawing_Gradient )
DrawText(fontX+5, fontY+5, "Use any font with OpenCV!", $FFFFFFFF)
*maskShadow\imageData = DrawingBuffer()
StopDrawing()
cvSmooth(*maskShadow, *maskShadow, #CV_GAUSSIAN, 13, 13, 0, 0) ; <----- blurring the shadow
EndIf
...
- captain_skank
- Enthusiast
- Posts: 636
- Joined: Fri Oct 06, 2006 3:57 pm
- Location: England
Re: PureBasic Interface to OpenCV
Hi,
Been mucking about with this excellent library recently and have been using it to view a RTSP feed.
The ip camera i'm using has an output of 1920*1080, but is there a way to scale resize the output on the screen to a smaller image - quality isn't important.
Any advice appreciated.
Cheers
Been mucking about with this excellent library recently and have been using it to view a RTSP feed.
The ip camera i'm using has an output of 1920*1080, but is there a way to scale resize the output on the screen to a smaller image - quality isn't important.
Any advice appreciated.
Cheers
- captain_skank
- Enthusiast
- Posts: 636
- Joined: Fri Oct 06, 2006 3:57 pm
- Location: England
Re: PureBasic Interface to OpenCV
Nevermind - found it :
is what i was after.
On another item is is there a correct way to change feeds ? I want to cycle through 6 different ip cameras.
Thanks
Code: Select all
cvResizeWindow()
On another item is is there a correct way to change feeds ? I want to cycle through 6 different ip cameras.
Thanks
Re: PureBasic Interface to OpenCV
Hi captain_skank,
Windows / OpenCV 32
- set Compiler--Compiler Options--Compile/Run--Current directory: binaries\
Instead of cvResizeWindow see the following example that uses cvResize:
- KEYS 1 - 7 (allow time for cameras to load)
NOTE: You could also include an option to have all six cameras displaying at the same time; relatively easy using OpenCV.captain_skank wrote:On another item is is there a correct way to change feeds ? I want to cycle through 6 different ip cameras.
Windows / OpenCV 32
- set Compiler--Compiler Options--Compile/Run--Current directory: binaries\
Instead of cvResizeWindow see the following example that uses cvResize:
- KEYS 1 - 7 (allow time for cameras to load)
Code: Select all
IncludeFile "includes/cv_functions.pbi"
Global lpPrevWndFunc
#CV_WINDOW_NAME = "PureBasic Interface to OpenCV"
#CV_DESCRIPTION = "View RTSP (Real Time Streaming Protocol) feeds." + #LF$ + #LF$ +
"[ 1-7 ] KEYS" + #TAB$ + ": Change Feed."
Procedure WindowCallback(hWnd, uMsg, wParam, lParam)
Shared exitCV
Select uMsg
Case #WM_COMMAND
Select wParam
Case 10
exitCV = #True
EndSelect
Case #WM_DESTROY
exitCV = #True
EndSelect
ProcedureReturn CallWindowProc_(lpPrevWndFunc, hWnd, uMsg, wParam, lParam)
EndProcedure
Procedure CaptureFeed(Array arrRTSP.s(1), nFeed)
*capture.CvCapture
If *capture : cvReleaseCapture(@*capture) : EndIf
Repeat
nCreate + 1
*capture = cvCreateFileCapture(arrRTSP(nFeed) + "?Transport=multicast")
Until nCreate = 5 Or *capture
ProcedureReturn *capture
EndProcedure
Procedure ResizeFrame(*capture, MaxSize)
FrameWidth = cvGetCaptureProperty(*capture, #CV_CAP_PROP_FRAME_WIDTH)
FrameHeight = cvGetCaptureProperty(*capture, #CV_CAP_PROP_FRAME_HEIGHT)
If FrameWidth > MaxSize
nRatio.d = MaxSize / FrameWidth
FrameWidth * nRatio : FrameHeight * nRatio
EndIf
*frame.IplImage
If *frame : cvReleaseImage(@*frame) : EndIf
*frame = cvCreateImage(FrameWidth, FrameHeight, #IPL_DEPTH_8U, 3)
ProcedureReturn *frame
EndProcedure
Dim arrRTSP.s(7)
arrRTSP(0) = "http://live.wazcam.net/live/quds.stream/playlist.m3u8"
arrRTSP(1) = "http://live.wazcam.net/live/kana.stream/playlist.m3u8"
arrRTSP(2) = "http://live.wazcam.net/live/tamra.stream/playlist.m3u8"
arrRTSP(3) = "http://live.wazcam.net/live/big.stream/playlist.m3u8"
arrRTSP(4) = "http://live.wazcam.net/live/city2.stream/playlist.m3u8"
arrRTSP(5) = "http://live.wazcam.net/live/mashhad.stream/playlist.m3u8"
arrRTSP(6) = "http://live.wazcam.net/live/reneh.stream/playlist.m3u8"
cvNamedWindow(#CV_WINDOW_NAME, #CV_WINDOW_AUTOSIZE)
window_handle = cvGetWindowHandle(#CV_WINDOW_NAME)
*window_name = cvGetWindowName(window_handle)
lpPrevWndFunc = SetWindowLongPtr_(window_handle, #GWL_WNDPROC, @WindowCallback())
hWnd = GetParent_(window_handle)
iconCV = LoadImage_(GetModuleHandle_(0), @"icons/opencv.ico", #IMAGE_ICON, 35, 32, #LR_LOADFROMFILE)
SendMessage_(hWnd, #WM_SETICON, 0, iconCV)
wStyle = GetWindowLongPtr_(hWnd, #GWL_STYLE)
SetWindowLongPtr_(hWnd, #GWL_STYLE, wStyle & ~(#WS_MAXIMIZEBOX | #WS_MINIMIZEBOX | #WS_SIZEBOX))
cvMoveWindow(#CV_WINDOW_NAME, 20, 20)
ToolTip(window_handle, #CV_DESCRIPTION)
*capture = CaptureFeed(arrRTSP(), 0)
*frame = ResizeFrame(*capture, 640)
*image.IplImage
font.CvFont : cvInitFont(@font, #CV_FONT_HERSHEY_COMPLEX_SMALL, 2, 2, #Null, 2, #CV_AA)
Repeat
*image = cvQueryFrame(*capture)
If *image
cvResize(*image, *frame, #CV_INTER_AREA)
cvPutText(*frame, "RTSP Feed: " + Str(nFeed + 1), 30, 60, @font, 0, 255, 255, 0)
cvShowImage(#CV_WINDOW_NAME, *frame)
keyPressed = cvWaitKey(10)
Select keyPressed
Case 49 To 55
nFeed = keyPressed - 49
*capture = CaptureFeed(arrRTSP(), nFeed)
*frame = ResizeFrame(*capture, 640)
EndSelect
Else
Break
EndIf
Until keyPressed = 27 Or exitCV
If *frame : cvReleaseImage(@*frame) : EndIf
cvDestroyAllWindows()
If *capture : cvReleaseCapture(@*capture) : EndIf
Last edited by JHPJHP on Fri Nov 10, 2017 2:05 pm, edited 1 time in total.
- captain_skank
- Enthusiast
- Posts: 636
- Joined: Fri Oct 06, 2006 3:57 pm
- Location: England
Re: PureBasic Interface to OpenCV
Hi JHPJHP,
Thanks for the reply and code.
Unfortunately the code provided won't run - it throws an error 'The code execution cannot proceed becasue opencv_world330.dll was not found'
I have checked and the .dll is in the binaries folder.
As an aside I did get a similar version of what you proposed working using cv_webcam_text.pb as a starting point. It's not pretty and will probably crash more times than a plane wihthout wings![Smile :)](./images/smilies/icon_smile.gif)
I would be interested in knowing how to display multiple feeds at once though.
Cheers
Thanks for the reply and code.
Unfortunately the code provided won't run - it throws an error 'The code execution cannot proceed becasue opencv_world330.dll was not found'
I have checked and the .dll is in the binaries folder.
As an aside I did get a similar version of what you proposed working using cv_webcam_text.pb as a starting point. It's not pretty and will probably crash more times than a plane wihthout wings
![Smile :)](./images/smilies/icon_smile.gif)
I would be interested in knowing how to display multiple feeds at once though.
Cheers
Re: PureBasic Interface to OpenCV
Hi captain_skank,
Not a problem, I can convert the code to work with the World version, but if you're not tied to that package, it might be better for you to download:
- Main Download: PureBasic Interface to OpenCV 2.4.13.3 :: 32 bit
-- more examples (includes the legacy Functions)
-- smaller size standalone applications (individual binaries)
Very slow to load the six feeds; would be faster with local cameras or a better connection.
- Main Download: PureBasic Interface to OpenCV 2.4.13.3 :: 32 bit
My fault, I should have asked which version of the interface you downloaded.captain_skank wrote:Unfortunately the code provided won't run - it throws an error 'The code execution cannot proceed becasue opencv_world330.dll was not found'
Not a problem, I can convert the code to work with the World version, but if you're not tied to that package, it might be better for you to download:
- Main Download: PureBasic Interface to OpenCV 2.4.13.3 :: 32 bit
-- more examples (includes the legacy Functions)
-- smaller size standalone applications (individual binaries)
*** The previous (updated) / following example should only be used as a guide to a more robust solution ***captain_skank wrote:I would be interested in knowing how to display multiple feeds at once though.
Very slow to load the six feeds; would be faster with local cameras or a better connection.
- Main Download: PureBasic Interface to OpenCV 2.4.13.3 :: 32 bit
Code: Select all
IncludeFile "includes/cv_functions.pbi"
Global lpPrevWndFunc
#CV_WINDOW_NAME = "PureBasic Interface to OpenCV"
#CV_DESCRIPTION = "View 6 RTSP (Real Time Streaming Protocol) feeds."
Procedure WindowCallback(hWnd, uMsg, wParam, lParam)
Shared exitCV
Select uMsg
Case #WM_COMMAND
Select wParam
Case 10
exitCV = #True
EndSelect
Case #WM_DESTROY
exitCV = #True
EndSelect
ProcedureReturn CallWindowProc_(lpPrevWndFunc, hWnd, uMsg, wParam, lParam)
EndProcedure
Dim arrRTSP.s(6) : Dim *capture.CvCapture(6)
arrRTSP(0) = "http://live.wazcam.net/live/quds.stream/playlist.m3u8"
arrRTSP(1) = "http://live.wazcam.net/live/kana.stream/playlist.m3u8"
arrRTSP(2) = "http://live.wazcam.net/live/tamra.stream/playlist.m3u8"
arrRTSP(3) = "http://live.wazcam.net/live/big.stream/playlist.m3u8"
arrRTSP(4) = "http://live.wazcam.net/live/city2.stream/playlist.m3u8"
arrRTSP(5) = "http://live.wazcam.net/live/mashhad.stream/playlist.m3u8"
For rtnCount = 0 To ArraySize(*capture()) - 1
Repeat
nCreate + 1
*capture(rtnCount) = cvCreateFileCapture(arrRTSP(rtnCount) + "?Transport=multicast")
Until nCreate = 5 Or *capture(rtnCount)
nCreate = 0
Next
FrameWidth = cvGetCaptureProperty(*capture(0), #CV_CAP_PROP_FRAME_WIDTH)
FrameHeight = cvGetCaptureProperty(*capture(0), #CV_CAP_PROP_FRAME_HEIGHT)
If FrameWidth > 320
nRatio.d = 320 / FrameWidth
FrameWidth * nRatio : FrameHeight * nRatio
EndIf
*frame.IplImage = cvCreateImage(FrameWidth * 3, FrameHeight * 2, #IPL_DEPTH_8U, 3)
cvNamedWindow(#CV_WINDOW_NAME, #CV_WINDOW_AUTOSIZE)
window_handle = cvGetWindowHandle(#CV_WINDOW_NAME)
*window_name = cvGetWindowName(window_handle)
lpPrevWndFunc = SetWindowLongPtr_(window_handle, #GWL_WNDPROC, @WindowCallback())
hWnd = GetParent_(window_handle)
iconCV = LoadImage_(GetModuleHandle_(0), @"icons/opencv.ico", #IMAGE_ICON, 35, 32, #LR_LOADFROMFILE)
SendMessage_(hWnd, #WM_SETICON, 0, iconCV)
wStyle = GetWindowLongPtr_(hWnd, #GWL_STYLE)
SetWindowLongPtr_(hWnd, #GWL_STYLE, wStyle & ~(#WS_MAXIMIZEBOX | #WS_MINIMIZEBOX | #WS_SIZEBOX))
cvMoveWindow(#CV_WINDOW_NAME, 20, 20)
ToolTip(window_handle, #CV_DESCRIPTION)
*image1.IplImage : *image2.IplImage : *image3.IplImage : *image4.IplImage : *image5.IplImage : *image6.IplImage
font.CvFont : cvInitFont(@font, #CV_FONT_HERSHEY_COMPLEX_SMALL, 1, 1, #Null, 1, #CV_AA)
Repeat
*image1 = cvQueryFrame(*capture(0)) : *image2 = cvQueryFrame(*capture(1)) : *image3 = cvQueryFrame(*capture(2))
*image4 = cvQueryFrame(*capture(3)) : *image5 = cvQueryFrame(*capture(4)) : *image6 = cvQueryFrame(*capture(5))
If *image1 And *image2 And *image3 And *image4 And *image5 And *image6
cvSetImageROI(*frame, 0, 0, FrameWidth, FrameHeight)
cvResize(*image1, *frame, #CV_INTER_AREA)
cvResetImageROI(*frame)
cvPutText(*frame, "----", 20, 30, @font, 0, 255, 255, 0)
cvSetImageROI(*frame, FrameWidth, 0, FrameWidth, FrameHeight)
cvResize(*image2, *frame, #CV_INTER_AREA)
cvResetImageROI(*frame)
cvPutText(*frame, "----", FrameWidth + 20, 30, @font, 0, 255, 255, 0)
cvSetImageROI(*frame, FrameWidth * 2, 0, FrameWidth, FrameHeight)
cvResize(*image3, *frame, #CV_INTER_AREA)
cvResetImageROI(*frame)
cvPutText(*frame, "----", FrameWidth * 2 + 20, 30, @font, 0, 255, 255, 0)
cvSetImageROI(*frame, 0, FrameHeight, FrameWidth, FrameHeight)
cvResize(*image4, *frame, #CV_INTER_AREA)
cvResetImageROI(*frame)
cvPutText(*frame, "----", 20, FrameHeight + 30, @font, 0, 255, 255, 0)
cvSetImageROI(*frame, FrameWidth, FrameHeight, FrameWidth, FrameHeight)
cvResize(*image5, *frame, #CV_INTER_AREA)
cvResetImageROI(*frame)
cvPutText(*frame, "----", FrameWidth + 20, FrameHeight + 30, @font, 0, 255, 255, 0)
cvSetImageROI(*frame, FrameWidth * 2, FrameHeight, FrameWidth, FrameHeight)
cvResize(*image6, *frame, #CV_INTER_AREA)
cvResetImageROI(*frame)
cvPutText(*frame, "----", FrameWidth * 2 + 20, FrameHeight + 30, @font, 0, 255, 255, 0)
cvShowImage(#CV_WINDOW_NAME, *frame)
keyPressed = cvWaitKey(10)
Else
Break
EndIf
Until keyPressed = 27 Or exitCV
cvReleaseImage(@*frame)
cvDestroyAllWindows()
For rtnCount = 0 To ArraySize(*capture()) - 1
If *capture(rtnCount) : cvReleaseCapture(@*capture(rtnCount)) : EndIf
Next
- captain_skank
- Enthusiast
- Posts: 636
- Joined: Fri Oct 06, 2006 3:57 pm
- Location: England
Re: PureBasic Interface to OpenCV
Awesome stuff JHPJHP.
Thanks for all the help.
Gotta say this is an exceptional piece of work.
cheers
Thanks for all the help.
Gotta say this is an exceptional piece of work.
cheers
Re: PureBasic Interface to OpenCV
Exceptional doesn't even begin to cover it. I had no hopes at all for this when I stumbled upon it.
My lack of experience does however make it a bit hard to use. I would really love to see ready to use functions for example locating faces using all those different methods (Eigenfaces, Fisherfaces etc) in an image, with parameters such as scale and neighbors natively in the wrapper. Would make it easier to step through the code and learn it bit by bit, but still be able to use it from scratch.
The face recognition is impressive, but watching how some people combine the different methods, compare the results and save the final product makes the detection rate really high. If one then can save a face and in the future compare a detected face with all the saved ones, that would be fantastic. Not expecting anyone to do all that, but just throwing the idea out there. This is a fantastic extension to PB.
My lack of experience does however make it a bit hard to use. I would really love to see ready to use functions for example locating faces using all those different methods (Eigenfaces, Fisherfaces etc) in an image, with parameters such as scale and neighbors natively in the wrapper. Would make it easier to step through the code and learn it bit by bit, but still be able to use it from scratch.
The face recognition is impressive, but watching how some people combine the different methods, compare the results and save the final product makes the detection rate really high. If one then can save a face and in the future compare a detected face with all the saved ones, that would be fantastic. Not expecting anyone to do all that, but just throwing the idea out there. This is a fantastic extension to PB.
Re: PureBasic Interface to OpenCV
Hi captain_skank and PeterH,
Thank you both for your kind comments.
It bears repeating, two forum members who were main contributors to the interface.
- AAT: consistent support with the interface and examples throughout the Windows builds
- wilbert: invaluable support converting the Windows builds to OSX and Linux
----------------------------------------------------
PeterH, the following are some examples demonstrating OpenCV capabilities in face detection that could be adapted for face recognition.
- there are additional examples with techniques that could enhance results: skin detection, object detection, filter and selection, etc.
NOTE: Using a combination of the following methods can produce better results.
cv_webcam_matchtemplate.pb: good for object matching with little distortion
- use the mouse to draw a rectangle
- put an object (your face) inside the rectangle
- press the Spacebar to capture the object
-- M Key to switch the method
-- S Key to show / hide the match
cv_webcam_camshift.pb: uses histogram matching, distortion not a concern
- use the mouse to draw a rectangle around your face
-- press the Spacebar to show the histogram
-- P Key to toggle projection mode
cv_webcam_haardetect_face.pb: detects (front) facial features based on pre-trained files (binaries/haarcascade_frontalface)
- Trackbar 1: Adjust scale factor
- Trackbar 2: Set minimum neighbors
- press the Spacebar to change between the 4 trained HaarCascade files
-- M Key to add a funny mask
-- S Key to toggle scale-factor flag
The following two examples can be used to create accurate facial-recognition files.
- creates a HaarCascade trained file that can be used with cv_webcam_haardetect_face.pb
cv_webcam_haardetect_train_1.pb: uses newer training files
cv_webcam_haardetect_train_2.pb: uses older training files
- directions: references/haarcascade.txt
Other examples that might be of interest.
- cv_haardetect_face.pb: detect frontal-faces
- cv_matchtemplate.pb: match one face against many faces
- cv_norm.pb: match an image against a directory of images
Thank you both for your kind comments.
It bears repeating, two forum members who were main contributors to the interface.
- AAT: consistent support with the interface and examples throughout the Windows builds
- wilbert: invaluable support converting the Windows builds to OSX and Linux
----------------------------------------------------
PeterH, the following are some examples demonstrating OpenCV capabilities in face detection that could be adapted for face recognition.
- there are additional examples with techniques that could enhance results: skin detection, object detection, filter and selection, etc.
NOTE: Using a combination of the following methods can produce better results.
cv_webcam_matchtemplate.pb: good for object matching with little distortion
- use the mouse to draw a rectangle
- put an object (your face) inside the rectangle
- press the Spacebar to capture the object
-- M Key to switch the method
-- S Key to show / hide the match
cv_webcam_camshift.pb: uses histogram matching, distortion not a concern
- use the mouse to draw a rectangle around your face
-- press the Spacebar to show the histogram
-- P Key to toggle projection mode
cv_webcam_haardetect_face.pb: detects (front) facial features based on pre-trained files (binaries/haarcascade_frontalface)
- Trackbar 1: Adjust scale factor
- Trackbar 2: Set minimum neighbors
- press the Spacebar to change between the 4 trained HaarCascade files
-- M Key to add a funny mask
-- S Key to toggle scale-factor flag
The following two examples can be used to create accurate facial-recognition files.
- creates a HaarCascade trained file that can be used with cv_webcam_haardetect_face.pb
cv_webcam_haardetect_train_1.pb: uses newer training files
cv_webcam_haardetect_train_2.pb: uses older training files
- directions: references/haarcascade.txt
Other examples that might be of interest.
- cv_haardetect_face.pb: detect frontal-faces
- cv_matchtemplate.pb: match one face against many faces
- cv_norm.pb: match an image against a directory of images
Last edited by JHPJHP on Mon Jul 11, 2022 2:38 pm, edited 1 time in total.