how to write morphological based edge detection code based using imdilate and erode to find edges for image of one pixel width

Finding edges For attached image using morphological based functions like imdilate and imerode

Answer 1

[Image Analyst]

Did you try obvious things like

edgeImageE = double(grayImage) - double(imerode(grayImage));
imshow(edgeImageE, []);
edgeImageD = double(grayImage) - double(imdilate(grayImage));
imshow(edgeImageD, []);

on your images (which were not attached by the way)?

[kavya p]

First I dilate image using imdilate with structuring element than erode results with same structuring using imerode tan subtract obtained result after dilation & erosion I getting result for images rather tan this image which I attached

[Image Analyst]

The dilation will probably be all white. The erosion of that image will also be all white since erosion is a local min and there are no mins - the entire image is 255. The erosion of the original image will have thicker black lines. The subtraction of the erosion of the original from the dilation of the original should show something. What is the problem? Where is your code and original image, or screenshots of your resulting images? Try this.