# OpenCV——image cropping

**URL:** <https://forum.opencv.org/t/opencv-image-cropping/4497>\
**Category:** Uncategorized\
**Created:** [July 28, 2021, 6:04am UTC](https://forum.opencv.org/t/opencv-image-cropping/4497 "2021-07-28T06:04:40Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![pluto](https://avatars.discourse-cdn.com/v4/letter/p/f08c70/32.png) [@pluto](https://forum.opencv.org/u/pluto)\
**Post date:** [July 28, 2021, 6:04am UTC](https://forum.opencv.org/t/opencv-image-cropping/4497/1 "2021-07-28T06:04:40Z")

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OpenCV takes 256\*256 samples of the images formed after the earthquake and the random events of yushu disaster damage images to form a sample set.

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**Author:** ![berak](https://avatars.discourse-cdn.com/v4/letter/b/85f322/32.png) [@berak](https://forum.opencv.org/u/berak)\
**Post date:** [July 28, 2021, 7:24am UTC](https://forum.opencv.org/t/opencv-image-cropping/4497/2 "2021-07-28T07:24:32Z")

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and what is your question, now ?

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**Author:** ![pluto](https://avatars.discourse-cdn.com/v4/letter/p/f08c70/32.png) [@pluto](https://forum.opencv.org/u/pluto)\
**Post date:** [July 28, 2021, 7:39am UTC](https://forum.opencv.org/t/opencv-image-cropping/4497/3 "2021-07-28T07:39:37Z")

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How to crop an image with OpenCV?

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**Author:** ![berak](https://avatars.discourse-cdn.com/v4/letter/b/85f322/32.png) [@berak](https://forum.opencv.org/u/berak)\
**Post date:** [July 28, 2021, 8:15am UTC](https://forum.opencv.org/t/opencv-image-cropping/4497/4 "2021-07-28T08:15:54Z")

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please [read docs](https://docs.opencv.org/master/d5/d98/tutorial_mat_operations.html)