Region of Interest Image Processing

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Algorithms Analyst 2013-11-13

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/105963-region-of-interest-image-processing

评论： Image Analyst 2013-11-13

采纳的回答： Image Analyst

Hello All

I want to apply some algorithm only on region of interest in an input image.

Let say I have an image A.

image_A=imread('1.jpg'); "size is 576x576"

[rows cols colors]=size(image_A);

image_interest=zeros(rows,cols,colors);

new_image=imcrop(image_A);"this crops only interested region lets say I am cropped the lower region from image_A".

"Now I want this region size as same as image_A" for further processing.

Let say I wan to subtract these two images. like

dist=abs(image_A-new_image)..

can any one help...

采纳的回答

Image Analyst 2013-11-13

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https://ww2.mathworks.cn/matlabcentral/answers/105963-region-of-interest-image-processing#answer_115083

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Use imresize() to stretch the lower half image up to the size of the original image_A:

new_image = imresize(new_image, size(image_A));

I want to detect abondoned object on the ground that's why I define ROI fro image.if the ROI is not same size then I cannot perform subtraction.is there any way to do that by only considering the ROI.

Image Analyst 2013-11-13

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Then you just extract the bottom half of the images. You don't resize anything.

backgroundBottomHalf = double(backgroundImage(rows/2:end, :));
oneFrameBottomHalf = double(thisFrame(rows/2:end, :));
difference = abs(oneFrameBottomHalf - backgroundBottomHalf);

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