Access one part of the image

#Mat#opencv#c++

asked 2014-09-23 05:46:04 -0600

Ardui
1 ●1

Hi, I'm working on Optical flow LK method and balance strategy using Optical flow. For now I found out the vector length using

float fVmag = sqrt((float)((points[0][i].x-points[1][i].x)*(points[0][i].x-points[1][i].x)+(points[0][i].y-points[1][i].y)*(points[0][i].y-points[0][i].y)));

now I want to access only the vector length that are presented on the left side of the image. I was thinking to use image.cols/2 to split it into two equal parts. But I dont know how to access the data inside that region.

Any help or suggestion will be grateful. Thanks guys.

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answered 2014-09-23 08:15:10 -0600

FooBar
2938 ●9 ●37 http://magazino.eu/

To copy on half of the image, you could do it like that:

  img.cols(0,img.cols/2).copyTo(anotherImage)

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Thanks for your reply. I'll try it now. so do you suggest copy the left section of image and calculate the vector length present in that region separately??