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POHow to Extract part of Image inside specified boundary in MATLAB
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  1. POHow to Extract part of Image inside specified boundary in MATLAB
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    copied!<p>I am new to MATLAB, i wanted to know that can i extract a part of image from inside of a specified boundary,based on distinguishing color(red boundary in my case),The function,first traces the boundary of the image,then it extracts that part of image which is inside that particular boundary. I have my image(image of human head) attached, i wanted to extract the brain part from the head, other part of image should be ignored. I tried to find edges,using the following code(it shows 1's for boundaries, and 0 for no boundary),but it showed only 0's.</p> <p>Any help will be greatly appreciated.</p> <p>P.S. image attached shows original image and image with boundary....the code will be working on the one with boundary and will extract the part of image lying inside that boundary.</p> <p>Below is the code i tried:</p> <pre><code>BW = edge(x) BW = edge(x,'sobel') BW = edge(x,'sobel',thresh) BW = edge(x,'sobel',thresh,direction) [BW,thresh] = edge(x,'sobel',...) BW = edge(x,'prewitt') BW = edge(x,'prewitt',thresh) BW = edge(x,'prewitt',thresh,direction) [BW,thresh] = edge(x,'prewitt',...) BW = edge(x,'roberts') BW = edge(x,'roberts',thresh) [BW,thresh] = edge(x,'roberts',...) BW = edge(x,'log') BW = edge(x,'log',thresh) BW = edge(x,'log',thresh,sigma) [BW,threshold] = edge(x,'log',...) BW = edge(x,'zerocross',thresh,h) [BW,thresh] = edge(x,'zerocross',...) BW = edge(x,'canny') BW = edge(x,'canny',thresh) BW = edge(x,'canny',thresh,sigma) [BW,threshold] = edge(x,'canny',...) </code></pre> <p><img src="https://i.stack.imgur.com/DCsoT.jpg" alt="enter image description here"></p>
 

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