I wanted to use OpenCV v4+ in AutoIt.
I found Opencv UDF on the forum, but there was no support for OpenCV v4+
This UDF provides support for OpenCV v4+
Update
There is a new implementation using COM. It is almost as easy as python to use
It is also possible to interact with GDI+
Download and extract opencv-4.7.0-windows.exe into a folder Download and extract autoit-opencv-4.7.0-com-v2.3.1.7z into a folder Sources
Here
Documentation
A generated documentation for functions is available here
Examples
More samples can be found here
To run them, please follow these instructions
Showing an image
#Region ;**** Directives created by AutoIt3Wrapper_GUI **** #AutoIt3Wrapper_UseX64=y #EndRegion ;**** Directives created by AutoIt3Wrapper_GUI **** #include "autoit-opencv-com\udf\opencv_udf_utils.au3" _OpenCV_Open("opencv-4.7.0-windows\opencv\build\x64\vc16\bin\opencv_world470.dll", "autoit-opencv-com\autoit_opencv_com470.dll") OnAutoItExitRegister("_OnAutoItExit") Example() Func Example() Local $cv = _OpenCV_get() If Not IsObj($cv) Then Return Local $img = _OpenCV_imread_and_check(_OpenCV_FindFile("samples\data\lena.jpg")) $cv.imshow("Image", $img) $cv.waitKey() $cv.destroyAllWindows() EndFunc ;==>Example Func _OnAutoItExit() _OpenCV_Close() EndFunc ;==>_OnAutoItExit Drawing contours
#Region ;**** Directives created by AutoIt3Wrapper_GUI **** #AutoIt3Wrapper_UseX64=y #EndRegion ;**** Directives created by AutoIt3Wrapper_GUI **** #include "autoit-opencv-com\udf\opencv_udf_utils.au3" _OpenCV_Open("opencv-4.7.0-windows\opencv\build\x64\vc16\bin\opencv_world470.dll", "autoit-opencv-com\autoit_opencv_com470.dll") OnAutoItExitRegister("_OnAutoItExit") Example() Func Example() Local $cv = _OpenCV_get() If Not IsObj($cv) Then Return Local $img = _OpenCV_imread_and_check("samples\data\pic1.png") Local $img_grey = $cv.cvtColor($img, $CV_COLOR_BGR2GRAY) $cv.threshold($img_grey, 100, 255, $CV_THRESH_BINARY) Local $thresh = $cv.extended[1] Local $contours = $cv.findContours($thresh, $CV_RETR_TREE, $CV_CHAIN_APPROX_SIMPLE) ConsoleWrite("Found " & UBound($contours) & " contours" & @CRLF & @CRLF) $cv.drawContours($img, $contours, -1, _OpenCV_Scalar(0, 0, 255), 2) $cv.imshow("Image", $img) $cv.waitKey() $cv.destroyAllWindows() EndFunc ;==>Example Func _OnAutoItExit() _OpenCV_Close() EndFunc ;==>_OnAutoItExit Showing an image in autoit GUI
#Region ;**** Directives created by AutoIt3Wrapper_GUI **** #AutoIt3Wrapper_UseX64=y #EndRegion ;**** Directives created by AutoIt3Wrapper_GUI **** #include "autoit-opencv-com\udf\opencv_udf_utils.au3" #include <GUIConstantsEx.au3> _OpenCV_Open("opencv-4.7.0-windows\opencv\build\x64\vc16\bin\opencv_world470.dll", "autoit-opencv-com\autoit_opencv_com470.dll") OnAutoItExitRegister("_OnAutoItExit") Example() Func Example() Local $cv = _OpenCV_get() If Not IsObj($cv) Then Return #Region ### START Koda GUI section ### Form= Local $FormGUI = GUICreate("show image in autoit gui", 400, 400, 200, 200) Local $Pic = GUICtrlCreatePic("", 0, 0, 400, 400) GUISetState(@SW_SHOW) #EndRegion ### END Koda GUI section ### Local $img = _OpenCV_imread_and_check(_OpenCV_FindFile("samples\data\lena.jpg")) _OpenCV_imshow_ControlPic($img, $FormGUI, $Pic) Local $nMsg While 1 $nMsg = GUIGetMsg() Switch $nMsg Case $GUI_EVENT_CLOSE ExitLoop EndSwitch WEnd $cv.destroyAllWindows() EndFunc ;==>Example Func _OnAutoItExit() _OpenCV_Close() EndFunc ;==>_OnAutoItExit Showing an image in an autosized autoit GUI
#Region ;**** Directives created by AutoIt3Wrapper_GUI **** #AutoIt3Wrapper_UseX64=y #EndRegion ;**** Directives created by AutoIt3Wrapper_GUI **** #include "autoit-opencv-com\udf\opencv_udf_utils.au3" #include <GUIConstantsEx.au3> _OpenCV_Open("opencv-4.7.0-windows\opencv\build\x64\vc16\bin\opencv_world470.dll", "autoit-opencv-com\autoit_opencv_com470.dll") OnAutoItExitRegister("_OnAutoItExit") Example() Func Example() Local $cv = _OpenCV_get() If Not IsObj($cv) Then Return #Region ### START Koda GUI section ### Form= Local $FormGUI = GUICreate("show image in autoit gui [WINDOW_AUTOSIZE]", 400, 400, 200, 200) Local $Pic = GUICtrlCreatePic("", 0, 0, 400, 400) GUISetState(@SW_SHOW) #EndRegion ### END Koda GUI section ### Local $img = _OpenCV_imread_and_check(_OpenCV_FindFile("samples\data\lena.jpg")) ; get the image size and resize the GUI and the PIC control WinMove($FormGUI, "", Default, Default, $img.width, $img.height) GUICtrlSetPos($Pic, Default, Default, $img.width, $img.height) _OpenCV_imshow_ControlPic($img, $FormGUI, $Pic) Local $nMsg While 1 $nMsg = GUIGetMsg() Switch $nMsg Case $GUI_EVENT_CLOSE ExitLoop EndSwitch WEnd $cv.destroyAllWindows() EndFunc ;==>Example Func _OnAutoItExit() _OpenCV_Close() EndFunc ;==>_OnAutoItExit Screen capture
#Region ;**** Directives created by AutoIt3Wrapper_GUI **** #AutoIt3Wrapper_UseX64=y #EndRegion ;**** Directives created by AutoIt3Wrapper_GUI **** #include "autoit-opencv-com\udf\opencv_udf_utils.au3" _OpenCV_Open("opencv-4.7.0-windows\opencv\build\x64\vc16\bin\opencv_world470.dll", "autoit-opencv-com\autoit_opencv_com470.dll") OnAutoItExitRegister("_OnAutoItExit") Example() Func Example() Local $cv = _OpenCV_get() If Not IsObj($cv) Then Return Local $iLeft = 200 Local $iTop = 200 Local $iWidth = 400 Local $iHeight = 400 Local $aRect[4] = [$iLeft, $iTop, $iWidth, $iHeight] Local $img = _OpenCV_GetDesktopScreenMat($aRect) $cv.imshow("Screen capture", $img) $cv.waitKey() $cv.destroyAllWindows() EndFunc ;==>Example Func _OnAutoItExit() _OpenCV_Close() EndFunc ;==>_OnAutoItExit Find template
#Region ;**** Directives created by AutoIt3Wrapper_GUI **** #AutoIt3Wrapper_UseX64=y #EndRegion ;**** Directives created by AutoIt3Wrapper_GUI **** #include "autoit-opencv-com\udf\opencv_udf_utils.au3" _OpenCV_Open("opencv-4.7.0-windows\opencv\build\x64\vc16\bin\opencv_world470.dll", "autoit-opencv-com\autoit_opencv_com470.dll") OnAutoItExitRegister("_OnAutoItExit") Example() Func Example() Local $cv = _OpenCV_get() If Not IsObj($cv) Then Return Local $img = _OpenCV_imread_and_check(_OpenCV_FindFile("samples\data\mario.png")) Local $tmpl = _OpenCV_imread_and_check(_OpenCV_FindFile("samples\data\mario_coin.png")) ; The higher the value, the higher the match is exact Local $threshold = 0.8 Local $aMatches = _OpenCV_FindTemplate($img, $tmpl, $threshold) Local $aRedColor = _OpenCV_RGB(255, 0, 0) Local $aMatchRect[4] = [0, 0, $tmpl.width, $tmpl.height] For $i = 0 To UBound($aMatches) - 1 $aMatchRect[0] = $aMatches[$i][0] $aMatchRect[1] = $aMatches[$i][1] ; Draw a red rectangle around the matched position $cv.rectangle($img, $aMatchRect, $aRedColor) Next $cv.imshow("Find template example", $img) $cv.waitKey() $cv.destroyAllWindows() EndFunc ;==>Example Func _OnAutoItExit() _OpenCV_Close() EndFunc ;==>_OnAutoItExit Video capture file
#Region ;**** Directives created by AutoIt3Wrapper_GUI **** #AutoIt3Wrapper_UseX64=y #EndRegion ;**** Directives created by AutoIt3Wrapper_GUI **** #include "autoit-opencv-com\udf\opencv_udf_utils.au3" #include <Misc.au3> _OpenCV_Open("opencv-4.7.0-windows\opencv\build\x64\vc16\bin\opencv_world470.dll", "autoit-opencv-com\autoit_opencv_com470.dll") OnAutoItExitRegister("_OnAutoItExit") Example() Func Example() Local $cv = _OpenCV_get() If Not IsObj($cv) Then Return Local $cap = _OpenCV_ObjCreate("cv.VideoCapture").create(_OpenCV_FindFile("samples\data\vtest.avi")) If Not $cap.isOpened() Then ConsoleWriteError("!>Error: cannot open the video file." & @CRLF) Exit EndIf Local $frame = _OpenCV_ObjCreate("cv.Mat") While 1 If _IsPressed("1B") Or _IsPressed(Hex(Asc("Q"))) Then ExitLoop EndIf If Not $cap.read($frame) Then ConsoleWriteError("!>Error: cannot read the video or end of the video." & @CRLF) ExitLoop EndIf $cv.imshow("capture video file", $frame) Sleep(30) WEnd $cv.destroyAllWindows() EndFunc ;==>Example Func _OnAutoItExit() _OpenCV_Close() EndFunc ;==>_OnAutoItExit Video capture camera
#Region ;**** Directives created by AutoIt3Wrapper_GUI **** #AutoIt3Wrapper_UseX64=y #EndRegion ;**** Directives created by AutoIt3Wrapper_GUI **** #include "autoit-opencv-com\udf\opencv_udf_utils.au3" #include <Misc.au3> _OpenCV_Open("opencv-4.7.0-windows\opencv\build\x64\vc16\bin\opencv_world470.dll", "autoit-opencv-com\autoit_opencv_com470.dll") OnAutoItExitRegister("_OnAutoItExit") Example() Func Example() Local $cv = _OpenCV_get() If Not IsObj($cv) Then Return Local $iCamId = 0 Local $cap = _OpenCV_ObjCreate("cv.VideoCapture").create($iCamId) If Not $cap.isOpened() Then ConsoleWriteError("!>Error: cannot open the camera." & @CRLF) Exit EndIf Local $frame = _OpenCV_ObjCreate("cv.Mat") While 1 If _IsPressed("1B") Or _IsPressed(Hex(Asc("Q"))) Then ExitLoop EndIf If $cap.read($frame) Then ;; Flip the image horizontally to give the mirror impression $frame = $cv.flip($frame, 1) $cv.imshow("capture camera", $frame) Else ConsoleWriteError("!>Error: cannot read the camera." & @CRLF) EndIf Sleep(30) WEnd $cv.destroyAllWindows() EndFunc ;==>Example Func _OnAutoItExit() _OpenCV_Close() EndFunc ;==>_OnAutoItExit Resize an image with GDI+
#Region ;**** Directives created by AutoIt3Wrapper_GUI **** #AutoIt3Wrapper_UseX64=y #EndRegion ;**** Directives created by AutoIt3Wrapper_GUI **** #include "autoit-opencv-com\udf\opencv_udf_utils.au3" _OpenCV_Open("opencv-4.7.0-windows\opencv\build\x64\vc16\bin\opencv_world470.dll", "autoit-opencv-com\autoit_opencv_com470.dll") _GDIPlus_Startup() OnAutoItExitRegister("_OnAutoItExit") Example() Func Example() Local $cv = _OpenCV_get() If Not IsObj($cv) Then Return Local $bMethod = 1 Local $img = _OpenCV_imread_and_check(_OpenCV_FindFile("samples\tutorial_code\yolo\scooter-5180947_1920.jpg")) Local $resized If $bMethod Then $resized = $img.GdiplusResize(600, 400) Else Local $hImage = $img.convertToBitmap() Local $hResizedImage = _GDIPlus_ImageResize($hImage, 600, 400) _GDIPlus_BitmapDispose($hImage) $resized = $cv.createMatFromBitmap($hResizedImage) _GDIPlus_BitmapDispose($hResizedImage) EndIf $cv.imshow("Resized with GDI+", $resized) $cv.waitKey() $cv.destroyAllWindows() EndFunc ;==>Example Func _OnAutoItExit() _GDIPlus_Shutdown() _OpenCV_Close() EndFunc ;==>_OnAutoItExit  

Greetings,
here is a Autoit3 v3.3.14.5, 64 Bit installation on windows 10 with current updates.
In a simple script I'm Dllcall'ing a 64 bit dll.
# T1.au3 Local $name = "T1DLL.dll" if (FileExists($name)) Then ConsoleWrite("DLL '" &$name &"' exists" &@CRLF) EndIf Local $DLL = DllOpen($name) if (@ERROR OR $DLL = -1) then ConsoleWrite("DllOpen ERROR=" &@ERROR &" DLL=" &$DLL &@CRLF) Else ConsoleWrite("DllOpen Success" &@CRLF) endif DllCall($DLL, "none:cdecl", "SomeFunction", "str", "DLL Call from T1.au3") if (@ERROR) then ConsoleWrite("DllCall ERROR=" &@ERROR &" DLL=" &$DLL &@CRLF) Else ConsoleWrite("DllCall Success" &@CRLF) endif The C code contains one 64 bit OpenCV call:    cv::destroyAllWindows();.

Excuting T1.au3 with SciTE gives:

If the c code is compiled *without* the OpenCV call T1.au3 runs successful:
 
I checked T1DLL.dll, it's definitely a 64 bit dll.
What could cause the problem?
Any hint would be very much appreciated.
Thanks
Wolf