# welcom i need help

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fatima ali on 11 Nov 2014
Commented: fatima ali on 11 Nov 2014
i need code or function in matlab to convert color image to gray and convert gray to binary first employ Canny edge detection with binary thresholding on the original image to keep the most signicant edges only, which reliably represent foot contours.and next step morphological dilation using a square structuring element to close the boundary.Last, we employ morphological erosion on this image.....thanks

Image Analyst on 11 Nov 2014
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Image Analyst on 11 Nov 2014
It found the boundary. Not sure why it matters how it was done. Sure you could use something that's not as good and then try a bunch of things to fix it up, but why, when there's a simpler and better way. I never would have looked at that image and said "Let's use edge detection."
fatima ali on 11 Nov 2014
sure ...but i work Project to extraction feature from foot ... need this step to project .. 1-thershold no number like 0.5 i need Equation thershold run on all image 2- convert image binary and detection edge using canny 3- next step morphological dilation using a square structuring element to close the boundary.Last, we employ morphological erosion on this image can you help me....thank you very much

jason on 11 Nov 2014
clear
clc
close all;
img_file = 'put your image here';
figure(1), imshow(img_wk);
img_wk_gs = rgb2gray(img_wk); %converts color image to grayscale
figure(2), imshow(img_wk_gs);
img_wk_gs_edge = edge(img_wk_gs,'canny');
figure(3), imshow(img_wk_gs_edge);
img_wk_gs_edge_sobel = edge(img_wk_gs,'sobel');
figure(4), imshow(img_wk_gs_edge_sobel);
img_wk_bw = im2bw(img_wk, 0.7); %converts to black and white binary image
figure(5), imshow(img_wk_bw);
fatima ali on 11 Nov 2014
thank you very much ....but i no need thershold no 0.7 i need Equation thershold ....in this program you no run dilation using a square structuring element to close the boundary.Last, we employ morphological erosion on this image.... thanks
jason on 11 Nov 2014
You're welcome

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