# \#roi

**URL:** https://forum.opencv.org/tag/roi/128.md

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## [Image processing on the drawcontours area](https://forum.opencv.org/t/image-processing-on-the-drawcontours-area/1331)

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**Author:** [@Redhwan\_Algabri](https://forum.opencv.org/u/Redhwan_Algabri)\
**Replies:** 1\
**Last updated:** [February 4, 2021, 8:28am UTC](https://forum.opencv.org/t/image-processing-on-the-drawcontours-area/1331 "2021-02-04T08:28:24Z")

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I’d like to convert only the drawcontours area to RGB images, then convert it to HSV again in order to update lower and upper values every frame over time. Note: I’d like to avoid using the ROI of the rectangle area bec…

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## [Comparing ROI coordinates from one image to another?](https://forum.opencv.org/t/comparing-roi-coordinates-from-one-image-to-another/1139)

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**Author:** [@Blaze](https://forum.opencv.org/u/Blaze)\
**Replies:** 2\
**Last updated:** [January 26, 2021, 6:52pm UTC](https://forum.opencv.org/t/comparing-roi-coordinates-from-one-image-to-another/1139 "2021-01-26T18:52:30Z")

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Hello all, New user here. I’m trying to find somewhere that will actually get attention. I’ve asked some questions on the OpenCV reddit page before and other places but usually doesn’t get many views/ responses. Just wa…