How to remove specified part in image and count number of objects in the image
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![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1246902/image.png)
Hello guys,
I would like to remove the part which is at the bottom right.
After that I need to caculate the number of objects in the image.
Thanks so much for your help in advance
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Image Analyst
2022 年 12 月 29 日
You can erase the lower right corner of the image like this:
rgbImage(end-50 : end, end-100 : end, :) = 0;
There are more general ways to erase anything outside of the circle, but you don't need that if all you want to do is erase the micron bar and it's in the same location for all your images -- you can simply set that portion to zero like I did above.
However if you want to see the more general way, even though you don't need it, let me know. It probably involves imclose, imclearborder, and bwareafilt
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Image Analyst
2022 年 12 月 30 日
Yes it's easier because we don't have the zeros penetrating into the circle area, so it's easier to get the background mask. See attached.
You can get my interactive thresholding app here:
or else just segment the masked gray scale image however you were doing it instead of thresholding.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1247612/image.png)
その他の回答 (1 件)
Sulaymon Eshkabilov
2022 年 12 月 29 日
See this solution post: https://www.mathworks.com/matlabcentral/answers/486087-remove-specific-objects-from-an-image
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