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How to change aspect ratio?

asked 2013-11-19 05:09:53 -0500

anon321 gravatar image

I need to change the aspect ratio of a video frame without changing the size of the image which is 640x480. For example I would like to to squeeze the 640x480 image so that the excess space becomes black but the size of the actual image is still 640x480. Is this possible?

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answered 2013-11-19 05:32:38 -0500

Michael Burdinov gravatar image

Here is simple example of squeezing the image in y direction by factor 2:

Mat squeezedImg(Size(640,480), CV_8U, Scalar(0));
Rect squeezedRect(0, 120, 640, 240);
resize(inputImg, squeezedImg(squeezedRect), Size(640,240));
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Thank you!

anon321 gravatar imageanon321 ( 2013-11-19 05:36:50 -0500 )edit

You are welcome

Michael Burdinov gravatar imageMichael Burdinov ( 2013-11-19 07:10:14 -0500 )edit
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Asked: 2013-11-19 05:09:53 -0500

Seen: 1,641 times

Last updated: Nov 19 '13