OpenCV very low performance on Camera settings Change
Posted: Fri Jun 02, 2017 12:57 am
Hi,
Below the slightly modified "pb_cam_resolution.pb" and "pb_cam_preferences.pb" from openCV examples.
1st: GadgetDraw on first start is lagging. (If camera image is for some reason too dark or bright then lagging increases)
2nd: Changing Camera settings negatively affect program overall performance
3rd: Couldn't make option for listing/choosing existing cameras by means of OpenCV
4th: cvShowImage(#CV_WINDOW_NAME, *resize) like native function for using/showing with gadgets (Image, ButtonImage, Canvas or Custom gadgets)
Thank You very much
Below the slightly modified "pb_cam_resolution.pb" and "pb_cam_preferences.pb" from openCV examples.
Code: Select all
IncludeFile "includes/cv_functions.pbi"
Global *capture.CvCapture
Global DefBrightness.d, MaxBrightness.d, MinBrightness.d, DefContrast.d, MaxContrast.d, MinContrast.d
Global DefGamma.d, MaxGamma.d, MinGamma.d, DefSaturation.d, MaxSaturation.d, MinSaturation.d
Global DefHue.d, MaxHue.d, MinHue.d, DefSharpness.d, MaxSharpness.d, MinSharpness.d
Global DefExposure.d, MaxExposure.d, MinExposure.d
Global Dim size.Size(0)
Define FrameWidth.l = 640, FrameHeight.l = 480
#CV_WINDOW_NAME = "PureBasic Interface to OpenCV"
#CV_DESCRIPTION = "Creates an interface to the webcam's parameters such as brightness, contrast, hue, etc." + #LF$ + #LF$ +
"NOTE:" + #LF$ + "A preference file is created if one cannot be found."
Procedure ReadCamData()
Preference.s = ProgramFilename()+":preferences.txt"
If Not OpenPreferences(Preference)
CreatePreferences(Preference)
defValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_BRIGHTNESS)
WritePreferenceLong("DefBrightness", defValue)
minValue = defValue : retMinValue = defValue
maxValue = defValue : retMaxValue = defValue
Repeat
minValue - 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_BRIGHTNESS, minValue)
retMinValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_BRIGHTNESS)
FixWindowUnresponsive()
Until minValue <> retMinValue
Repeat
maxValue + 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_BRIGHTNESS, maxValue)
retMaxValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_BRIGHTNESS)
FixWindowUnresponsive()
Until maxValue <> retMaxValue
If retMaxValue < defValue : retMaxValue = defValue : EndIf
If retMinValue > defValue : retMinValue = defValue : EndIf
WritePreferenceLong("MaxBrightness", retMaxValue)
WritePreferenceLong("MinBrightness", retMinValue)
defValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_CONTRAST)
WritePreferenceLong("DefContrast", defValue)
minValue = defValue : retMinValue = defValue
maxValue = defValue : retMaxValue = defValue
Repeat
minValue - 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_CONTRAST, minValue)
retMinValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_CONTRAST)
FixWindowUnresponsive()
Until minValue <> retMinValue
Repeat
maxValue + 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_CONTRAST, maxValue)
retMaxValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_CONTRAST)
FixWindowUnresponsive()
Until maxValue <> retMaxValue
If retMaxValue < defValue : retMaxValue = defValue : EndIf
If retMinValue > defValue : retMinValue = defValue : EndIf
WritePreferenceLong("MaxContrast", retMaxValue)
WritePreferenceLong("MinContrast", retMinValue)
defValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_GAMMA)
WritePreferenceLong("DefGamma", defValue)
minValue = defValue : retMinValue = defValue
maxValue = defValue : retMaxValue = defValue
Repeat
minValue - 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_GAMMA, minValue)
retMinValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_GAMMA)
FixWindowUnresponsive()
Until minValue <> retMinValue
Repeat
maxValue + 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_GAMMA, maxValue)
retMaxValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_GAMMA)
FixWindowUnresponsive()
Until maxValue <> retMaxValue
If retMaxValue < defValue : retMaxValue = defValue : EndIf
If retMinValue > defValue : retMinValue = defValue : EndIf
WritePreferenceLong("MaxGamma", retMaxValue)
WritePreferenceLong("MinGamma", retMinValue)
defValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_SATURATION)
WritePreferenceLong("DefSaturation", defValue)
minValue = defValue : retMinValue = defValue
maxValue = defValue : retMaxValue = defValue
Repeat
minValue - 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_SATURATION, minValue)
retMinValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_SATURATION)
FixWindowUnresponsive()
Until minValue <> retMinValue
Repeat
maxValue + 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_SATURATION, maxValue)
retMaxValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_SATURATION)
FixWindowUnresponsive()
Until maxValue <> retMaxValue
If retMaxValue < defValue : retMaxValue = defValue : EndIf
If retMinValue > defValue : retMinValue = defValue : EndIf
WritePreferenceLong("MaxSaturation", retMaxValue)
WritePreferenceLong("MinSaturation", retMinValue)
defValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_HUE)
WritePreferenceLong("DefHue", defValue)
minValue = defValue : retMinValue = defValue
maxValue = defValue : retMaxValue = defValue
Repeat
minValue - 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_HUE, minValue)
retMinValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_HUE)
FixWindowUnresponsive()
Until minValue <> retMinValue
Repeat
maxValue + 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_HUE, maxValue)
retMaxValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_HUE)
FixWindowUnresponsive()
Until maxValue <> retMaxValue
If retMaxValue < defValue : retMaxValue = defValue : EndIf
If retMinValue > defValue : retMinValue = defValue : EndIf
WritePreferenceLong("MaxHue", retMaxValue)
WritePreferenceLong("MinHue", retMinValue)
defValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_SHARPNESS)
WritePreferenceLong("DefSharpness", defValue)
minValue = defValue : retMinValue = defValue
maxValue = defValue : retMaxValue = defValue
Repeat
minValue - 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_SHARPNESS, minValue)
retMinValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_SHARPNESS)
FixWindowUnresponsive()
Until minValue <> retMinValue
Repeat
maxValue + 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_SHARPNESS, maxValue)
retMaxValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_SHARPNESS)
FixWindowUnresponsive()
Until maxValue <> retMaxValue
If retMaxValue < defValue : retMaxValue = defValue : EndIf
If retMinValue > defValue : retMinValue = defValue : EndIf
WritePreferenceLong("MaxSharpness", retMaxValue)
WritePreferenceLong("MinSharpness", retMinValue)
defValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_EXPOSURE)
WritePreferenceLong("DefExposure", defValue)
minValue = defValue : retMinValue = defValue
maxValue = defValue : retMaxValue = defValue
Repeat
minValue - 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_EXPOSURE, minValue)
retMinValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_EXPOSURE)
FixWindowUnresponsive()
Until minValue <> retMinValue
Repeat
maxValue + 1
cvSetCaptureProperty(*capture, #CV_CAP_PROP_EXPOSURE, maxValue)
retMaxValue = cvGetCaptureProperty(*capture, #CV_CAP_PROP_EXPOSURE)
FixWindowUnresponsive()
Until maxValue <> retMaxValue
If retMaxValue < defValue : retMaxValue = defValue : EndIf
If retMinValue > defValue : retMinValue = defValue : EndIf
WritePreferenceLong("MaxExposure", retMaxValue)
WritePreferenceLong("MinExposure", retMinValue)
EndIf
DefBrightness = ReadPreferenceLong("DefBrightness", 1)
DefContrast = ReadPreferenceLong("DefContrast", 1)
DefGamma = ReadPreferenceLong("DefGamma", 1)
DefSaturation = ReadPreferenceLong("DefSaturation", 1)
DefHue = ReadPreferenceLong("DefHue", 1)
DefSharpness = ReadPreferenceLong("DefSharpness", 1)
DefExposure = ReadPreferenceLong("DefExposure", 1)
MaxBrightness = ReadPreferenceLong("MaxBrightness", 1)
MaxContrast = ReadPreferenceLong("MaxContrast", 1)
MaxGamma = ReadPreferenceLong("MaxGamma", 1)
MaxSaturation = ReadPreferenceLong("MaxSaturation", 1)
MaxHue = ReadPreferenceLong("MaxHue", 1)
MaxSharpness = ReadPreferenceLong("MaxSharpness", 1)
MaxExposure = ReadPreferenceLong("MaxExposure", 1)
MinBrightness = ReadPreferenceLong("MinBrightness", 1)
MinContrast = ReadPreferenceLong("MinContrast", 1)
MinGamma = ReadPreferenceLong("MinGamma", 1)
MinSaturation = ReadPreferenceLong("MinSaturation", 1)
MinHue = ReadPreferenceLong("MinHue", 1)
MinSharpness = ReadPreferenceLong("MinSharpness", 1)
MinExposure = ReadPreferenceLong("MinExposure", 1)
cvSetCaptureProperty(*capture, #CV_CAP_PROP_BRIGHTNESS, DefBrightness)
cvSetCaptureProperty(*capture, #CV_CAP_PROP_CONTRAST, DefContrast)
cvSetCaptureProperty(*capture, #CV_CAP_PROP_GAMMA, DefGamma)
cvSetCaptureProperty(*capture, #CV_CAP_PROP_SATURATION, DefSaturation)
cvSetCaptureProperty(*capture, #CV_CAP_PROP_HUE, DefHue)
cvSetCaptureProperty(*capture, #CV_CAP_PROP_SHARPNESS, DefSharpness)
cvSetCaptureProperty(*capture, #CV_CAP_PROP_EXPOSURE, DefExposure)
EndProcedure
Procedure SetResolution(nWidth.l, nHeight.l)
cvSetCaptureProperty(*capture, #CV_CAP_PROP_FRAME_WIDTH, nWidth)
cvSetCaptureProperty(*capture, #CV_CAP_PROP_FRAME_HEIGHT, nHeight)
EndProcedure
Procedure ResolutionList(MaxWidth.l = 8192, MinWidth.l = 50, rStep.l = 50)
FrameWidth.l = cvGetCaptureProperty(*capture, #CV_CAP_PROP_FRAME_WIDTH)
FrameHeight.l = cvGetCaptureProperty(*capture, #CV_CAP_PROP_FRAME_HEIGHT)
Select #True
Case Bool(MaxWidth < FrameWidth)
MaxWidth = FrameWidth
Case Bool(MinWidth > FrameWidth)
MinWidth = FrameWidth
Case Bool(MinWidth < 50)
MinWidth = 50
EndSelect
For rtnCount.l = 1 To (MaxWidth - MinWidth)/rStep
cvSetCaptureProperty(*capture, #CV_CAP_PROP_FRAME_WIDTH, rtnCount * rStep + MinWidth)
cvSetCaptureProperty(*capture, #CV_CAP_PROP_FRAME_HEIGHT, rtnCount * rStep + MinWidth)
tmpFrameWidth = cvGetCaptureProperty(*capture, #CV_CAP_PROP_FRAME_WIDTH)
tmpFrameHeight = cvGetCaptureProperty(*capture, #CV_CAP_PROP_FRAME_HEIGHT)
If Not FindString(SearchString.s, Str(tmpFrameWidth) + ";")
ReDim size(ArraySize(size()) + 1)
size(ArrayCount)\cx = tmpFrameWidth
size(ArrayCount)\cy = cvGetCaptureProperty(*capture, #CV_CAP_PROP_FRAME_HEIGHT)
FrameWidth = size(ArrayCount)\cx : FrameHeight = size(ArrayCount)\cy
SearchString + Str(tmpFrameWidth) + ";"
ArrayCount + 1
EndIf
Next
ProcedureReturn ArraySize(size())
EndProcedure
Macro _Resolute
;{ GatherVData
ResizeImage(pbImage, nWidth, nHeight)
SetResolution(nWidth, nHeight)
ResizeWindow(0, 0, 0, nWidth+140, nHeight+33)
ResizeGadget(camGadget, 0, 0, nWidth, nHeight)
ResizeGadget(txtBrightness, nWidth+10, 25, 60, 20)
ResizeGadget(txtContrast, nWidth+10, 50, 60, 20)
ResizeGadget(txtGamma, nWidth+10, 75, 60, 20)
ResizeGadget(txtSaturation, nWidth+10, 100, 60, 20)
ResizeGadget(txtHue, nWidth+10, 125, 60, 20)
ResizeGadget(txtSharpness, nWidth+10, 150, 60, 20)
ResizeGadget(txtExposure, nWidth+10, 175, 60, 20)
ResizeGadget(txtResolution, nWidth+10, 200, 60, 20)
ResizeGadget(Braytnes, nWidth+65, 20, 50, 20)
ResizeGadget(Contrast, nWidth+65, 45, 50, 20)
ResizeGadget(Gamma, nWidth+65, 70, 50, 20)
ResizeGadget(Saturation, nWidth+65, 95, 50, 20)
ResizeGadget(Hue, nWidth+65, 120, 50, 20)
ResizeGadget(Sharpness, nWidth+65, 145, 50, 20)
ResizeGadget(Exposure, nWidth+65, 170, 50, 20)
ResizeGadget(Resolution, nWidth+65, 195, 75, 20)
;}
EndMacro
Repeat
nCreate + 1
*capture = cvCreateCameraCapture(#CV_CAP_ANY)
Until nCreate = 5 Or *capture
*image.IplImage
If *capture
ReadCamData()
If OpenWindow(0, 0, 0, FrameWidth, FrameHeight, #CV_WINDOW_NAME, #PB_Window_BorderLess | #PB_Window_ScreenCentered | #PB_Window_SystemMenu)
RedrawWindow_(WindowID(0),0,0,#RDW_INVALIDATE | #RDW_ERASE)
UpdateWindow_(WindowID(0))
HideFromTaskBar(WindowID(0),1)
StickyWindow(0,#True)
ResizeWindow(0,#PB_Ignore,#PB_Ignore,FrameWidth,FrameHeight)
SmartWindowRefresh(0,0)
HideWindow(0,1)
SetWindowLongPtr_(WindowID(0), #GWL_STYLE, GetWindowLongPtr_(WindowID(0), #GWL_STYLE) & ~(#WS_CAPTION | #WS_SYSMENU) | #WS_THICKFRAME)
nSize.l = ResolutionList(1280,640, 80)
If nSize
nWidth.l = size(ArraySize(size()) - 1)\cx : nHeight.l = size(ArraySize(size()) - 1)\cy
ResizeWindow(0, 0, 0, nWidth+140, nHeight+33)
pbImage.i = CreateImage(#PB_Any, nWidth, nHeight)
camGadget.l = ImageGadget(#PB_Any, 0, 0, nWidth, nHeight, ImageID(pbImage))
SetWindowLongPtr_(WindowID(0), #GWL_STYLE, GetWindowLongPtr_(WindowID(0), #GWL_STYLE) & ~#WS_THICKFRAME | (#WS_CAPTION | #WS_SYSMENU))
txtBrightness.l = TextGadget(#PB_Any, nWidth+10, 25, 60, 20, "Brightness:", #PB_Text_Right)
txtContrast.l = TextGadget(#PB_Any, nWidth+10, 50, 60, 20, "Contrast:", #PB_Text_Right)
txtGamma.l = TextGadget(#PB_Any, nWidth+10, 75, 60, 20, "Gamma:", #PB_Text_Right)
txtSaturation.l = TextGadget(#PB_Any, nWidth+10, 100, 60, 20, "Saturation:", #PB_Text_Right)
txtHue.l = TextGadget(#PB_Any, nWidth+10, 125, 60, 20, "Hue:", #PB_Text_Right)
txtSharpness.l = TextGadget(#PB_Any, nWidth+10, 150, 60, 20, "Sharpness:", #PB_Text_Right)
txtExposure.l = TextGadget(#PB_Any, nWidth+10, 175, 60, 20, "Exposure:", #PB_Text_Right)
txtResolution.l = TextGadget(#PB_Any, nWidth+10, 200, 60, 20, "Resolution:", #PB_Text_Right)
Braytnes.l = SpinGadget(#PB_Any, nWidth+65, 20, 50, 20, MinBrightness, MaxBrightness, #PB_Spin_ReadOnly | #PB_Spin_Numeric) : SetGadgetColor(Braytnes, #PB_Gadget_BackColor, $F0F0F0)
Contrast.l = SpinGadget(#PB_Any, nWidth+65, 45, 50, 20, MinContrast, MaxContrast, #PB_Spin_ReadOnly | #PB_Spin_Numeric) : SetGadgetColor(Contrast, #PB_Gadget_BackColor, $F0F0F0)
Gamma.l = SpinGadget(#PB_Any, nWidth+65, 70, 50, 20, MinGamma, MaxGamma, #PB_Spin_ReadOnly | #PB_Spin_Numeric) : SetGadgetColor(Gamma, #PB_Gadget_BackColor, $F0F0F0)
Saturation.l = SpinGadget(#PB_Any, nWidth+65, 95, 50, 20, MinSaturation, MaxSaturation, #PB_Spin_ReadOnly | #PB_Spin_Numeric) : SetGadgetColor(Saturation, #PB_Gadget_BackColor, $F0F0F0)
Hue.l = SpinGadget(#PB_Any, nWidth+65, 120, 50, 20, MinHue, MaxHue, #PB_Spin_ReadOnly | #PB_Spin_Numeric) : SetGadgetColor(Hue, #PB_Gadget_BackColor, $F0F0F0)
Sharpness.l = SpinGadget(#PB_Any, nWidth+65, 145, 50, 20, MinSharpness, MaxSharpness, #PB_Spin_ReadOnly | #PB_Spin_Numeric) : SetGadgetColor(Sharpness, #PB_Gadget_BackColor, $F0F0F0)
Exposure.l = SpinGadget(#PB_Any, nWidth+65, 170, 50, 20, MinExposure, MaxExposure, #PB_Spin_ReadOnly | #PB_Spin_Numeric) : SetGadgetColor(Exposure, #PB_Gadget_BackColor, $F0F0F0)
Resolution.l = ComboBoxGadget(#PB_Any, nWidth+65, 195, 75, 20)
For rtnCount.l = 0 To nSize - 1
AddGadgetItem(Resolution, -1, Str(size(rtnCount)\cx) + "x" + Str(size(rtnCount)\cy))
Next
SetGadgetState(Resolution, nSize - 1)
SetGadgetState(Braytnes, DefBrightness)
SetGadgetState(Contrast, DefContrast)
SetGadgetState(Gamma, DefGamma)
SetGadgetState(Saturation, DefSaturation)
SetGadgetState(Hue, DefHue)
SetGadgetState(Sharpness, DefSharpness)
SetGadgetState(Exposure, DefExposure)
AddKeyboardShortcut(0, #PB_Shortcut_Escape, 10)
ToolTip(GadgetID(camGadget), #CV_DESCRIPTION)
While WindowEvent():Wend ; (2)__-=::[ PROCESS ALL EVENTS NOW (gadget creation etc.) ]::=-__
HideWindow(0,0) ; (3)__-=::[ SHOW/UN-HIDE THE WINDOW ]::=-__
_Resolute
Repeat
Event = WindowEvent()
Select Event
Case #PB_Event_Gadget
Select EventGadget()
Case Braytnes
Select EventType()
Case #PB_EventType_Up
val.l = GetGadgetState(Braytnes)
Case #PB_EventType_Down
val.l = GetGadgetState(Braytnes)
EndSelect
cvSetCaptureProperty(*capture, #CV_CAP_PROP_BRIGHTNESS, val) : Debug "Val00: "+val
WritePreferenceLong("DefBrightness", val)
Case Contrast
Select EventType()
Case #PB_EventType_Up
val.l = GetGadgetState(Contrast)
Case #PB_EventType_Down
val.l = GetGadgetState(Contrast)
EndSelect
cvSetCaptureProperty(*capture, #CV_CAP_PROP_CONTRAST, val) : Debug "Val00: "+val
WritePreferenceLong("DefContrast", val)
Case Gamma
Select EventType()
Case #PB_EventType_Up
val.l = GetGadgetState(Gamma)
Case #PB_EventType_Down
val.l = GetGadgetState(Gamma)
EndSelect
cvSetCaptureProperty(*capture, #CV_CAP_PROP_GAMMA, val) : Debug "Val00: "+val
WritePreferenceLong("DefGamma", val)
Case Saturation
Select EventType()
Case #PB_EventType_Up
val.l = GetGadgetState(Saturation)
Case #PB_EventType_Down
val.l = GetGadgetState(Saturation)
EndSelect
cvSetCaptureProperty(*capture, #CV_CAP_PROP_SATURATION, val) : Debug "Val00: "+val
WritePreferenceLong("DefSaturation", val)
Case Hue
Select EventType()
Case #PB_EventType_Up
val.l = GetGadgetState(Hue)
Case #PB_EventType_Down
val.l = GetGadgetState(Hue)
EndSelect
cvSetCaptureProperty(*capture, #CV_CAP_PROP_HUE, val) : Debug "Val00: "+val
WritePreferenceLong("DefHue", val)
Case Sharpness
Select EventType()
Case #PB_EventType_Up
val.l = GetGadgetState(Sharpness)
Case #PB_EventType_Down
val.l = GetGadgetState(Sharpness)
EndSelect
cvSetCaptureProperty(*capture, #CV_CAP_PROP_SHARPNESS, val) : Debug "Val00: "+val
WritePreferenceLong("DefSharpness", val)
Case Exposure
Select EventType()
Case #PB_EventType_Up
val.l = GetGadgetState(Exposure) : Debug "Val00: "+val
Case #PB_EventType_Down
val.l = GetGadgetState(Exposure) : Debug "Val11: "+val
EndSelect
cvSetCaptureProperty(*capture, #CV_CAP_PROP_EXPOSURE, val) : Debug "Val22: "+val
WritePreferenceLong("DefExposure", val)
Case Resolution
Select EventType()
Case #PB_EventType_Change
Resolution$ = GetGadgetText(Resolution)
nPosition = FindString(Resolution$, "x")
nWidth = Val(Left(Resolution$, nPosition - 1))
nHeight = Val(Mid(Resolution$, nPosition + 1))
_Resolute
EndSelect
EndSelect
Case #PB_Event_CloseWindow : Break
Default
*image = cvQueryFrame(*capture)
If *image
cvFlip(*image, #Null, 1)
OpenCV2PBImage_ASM(*image, pbImage, *image\width, *image\height)
SetGadgetState(camGadget, ImageID(pbImage))
EndIf
EndSelect
ForEver
EndIf
EndIf
FreeImage(pbImage)
cvReleaseCapture(@*capture)
ClosePreferences()
Else
MessageRequester(#CV_WINDOW_NAME, "Unable to connect to a webcam - operation cancelled.", #MB_ICONERROR)
EndIf
2nd: Changing Camera settings negatively affect program overall performance
3rd: Couldn't make option for listing/choosing existing cameras by means of OpenCV
4th: cvShowImage(#CV_WINDOW_NAME, *resize) like native function for using/showing with gadgets (Image, ButtonImage, Canvas or Custom gadgets)
Thank You very much