CODEWITHSUNDEEP
c++opencvcomputer-vision
adairdavid
adairdavid

Reputation: 413

Is it possible to have a cv::Mat that contains pointers to scalars rather than scalars?

I am attempting to bridge between VTK (3D visualization library) and OpenCV (image processing library).

Currently, I am doing the following:

vtkWindowToImageFilter converts vtkRenderWindow (scene) into vtkImageData (pixels of render window).

I then have to copy each pixel of vtkImageData into a cv::Mat for processing and display with OpenCV.

This process needs to run in real time, so the redundant copy (scene pixels into ImageData into Mat) severely impacts performance. I would like to map directly from scene pixels to cv::Mat.

As the scene changes, I would like the cv::Mat to automatically reference the scene. Essentially, I would like a cv::Mat<uchar *>, rather than a cv::Mat<uchar>. Does that make sense? Or am I overcomplicating it?

Upvotes: 1

Views: 267

Answers (1)

EJ Shim
EJ Shim

Reputation: 11

vtkSmartPointer<vtkImageData> image = vtkSmartPointer<vtkImageData>::New();

int dims[3];
image->GetImageData()->GetDimensions(dims);
cv::Mat matImage(cv::Size(dims[0], dims[1]), CV_8UC3, image->GetImageData()->GetScalarPointer());`

I succeeded implementing vtkimagedata* directly into cv::Mat pointer array..

some functions such as cv::flip or matImage -= cv::Scalar(255,0,0)

directly working on vtkimagedata.

but functions like cv::resize or cv::Canny doesn't work.

Upvotes: 1

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