Opencv version 4.6 C++ API wrapper

[gidesa]

Hello,
for Opencv wrapper released many improvements and new examples:
- classes that encapsulate OCV vectors and pointers.
- a component to write movies from a video stream.
- an example for movie writing,
- an example that uses Machine Learning classifiers to recognize handwritten digits.
- a detailed documentation
See at 
https://github.com/gidesa/ocvWrapper46

[Mongkey]

hello gidesa, i found error compiling on dnn2 sample, this following line was throwing error:

Code: Pascal  [Select][+][-]

1. netResult:=TOcvParamMat.Create(resdims, cvSingle, 1, dptr);

frmDnnObjectDetection2.pas(227,58) Error: Incompatible type for arg no. 3: Got "ShortInt", expected "TOcvDataType"

how to solve this error?
Thank you.

Lazarus 3.6 (rev lazarus_3_6) FPC 3.2.2 x86_64-win64-win32/win64

[gidesa]

hello gidesa, i found error compiling on dnn2 sample, this following line was throwing error:

Code: Pascal  [Select][+][-]

1. netResult:=TOcvParamMat.Create(resdims, cvSingle, 1, dptr);

frmDnnObjectDetection2.pas(227,58) Error: Incompatible type for arg no. 3: Got "ShortInt", expected "TOcvDataType"

how to solve this error?
Thank you.

Lazarus 3.6 (rev lazarus_3_6) FPC 3.2.2 x86_64-win64-win32/win64

Hello, add this in Var section:

Code: Pascal  [Select][+][-]

1.   defaultArr: TArray<UInt64>;

Then, in procedure add defaultArr as last parameter of constructor:

Code: Pascal  [Select][+][-]

1.    
2.     SetLength(defaultArr, 0);
3. {..............................................}
4.     for j:=0 to  nrDetections-1 do
5.     begin
6.        // define a 1 x outW mat  over a block of the output matrix
7.        netResult:=TOcvParamMat.Create(resdims, cvSingle, 1, dptr, defaultArr);
8.       {..............................................}

Now fixed in repository.

[Mongkey]

Thank you gidesa,
Working very well, seems very promising fast detection, from 1 to 10 score, our lovely pascal wrapper got how many score compared to python and c++ from your point of view?

[gidesa]

Thank you gidesa,
Working very well, seems very promising fast detection, from 1 to 10 score, our lovely pascal wrapper got how many score compared to python and c++ from your point of view?

Thank you. Indeed note that the wrapper is just .... a wrapper on calculations done inside Opencv library, written in C++. So C++ remains faster, because interfacing from main program is more straighforward. And because heavy optimization work was done on some of its compilers (but not all C++ compilers are better than Pascal ones).
And, for heavy processing with millions of detection cycles  (realtime detection from a camera, or processing thousands of images), Pascal remains much better than Python.
I have done a little robot that just use this wrapper for continuous autonomous obstacle detection and object recognition.

[Mongkey]

I have done a little robot that just use this wrapper for continuous autonomous obstacle detection and object recognition.

Seems very interesting  .