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Problem with image processing using edge detection

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I am trying to do image processing using edge detection on several images. But it's working for all the images except the one I cropped and edited. Please help me. I really need to get this done.

  2 Comments

Shahrin Islam
Shahrin Islam on 27 Jul 2018
% Display the original Image image = imread('stop.jpeg'); % Read Colour Image and convert it to a grey level Image myimage = rgb2gray(image); % Apply Sobel Operator % Display only Both Edges sobelhz = edge(myimage,'sobel','both'); imshow(sobelhz,[]); title('Sobel - Both Edges');

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Accepted Answer

KALYAN ACHARJYA
KALYAN ACHARJYA on 27 Jul 2018
Edited: KALYAN ACHARJYA on 27 Jul 2018
%Change the file name, save as some different name.
% Close Matlab and Restart it again
% Nothing wrong in the following code
clc; clear all; close all;
% Display the original Image
image=imread('safety night.jpg');
% Read Colour Image and convert it to a grey level Image
myimage=rgb2gray(image);
imshow(myimage);
title('Gray Scale Image');

  1 Comment

Shahrin Islam
Shahrin Islam on 27 Jul 2018
Thanks I will give it a try. Can you please enlighten me on the question following the link - https://www.mathworks.com/matlabcentral/answers/412353-want-to-get-all-outputs-together-as-one-in-image-processing
thanks in advance

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More Answers (2)

Diwakar Ravichandran
Diwakar Ravichandran on 27 Jul 2018
Hi Shahrin,
I tried reproducing the issue,
One thing for you to note in your code is that the name of the image is different in the code. The file is named stopD.jpg, and your code is calling stop.jpeg.
So, that could be one cause of the issue. When I did try to reproduce I got an output which I have attached. Please verify that it is the correct output.
Hope this helps,
Cheers!

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Diwakar Ravichandran
Diwakar Ravichandran on 27 Jul 2018
Would you mind sharing your code? Or the error message that you received
It can help reproducing the issue
Shahrin Islam
Shahrin Islam on 27 Jul 2018
% Display the original Image image = imread('safety night.jpg');
% Read Colour Image and convert it to a grey level Image myimage = rgb2gray(image); imshow(myimage); title('Gray Scale Image');
Shahrin Islam
Shahrin Islam on 27 Jul 2018
>> gray Attempt to execute SCRIPT gray as a function: C:\Users\User\Desktop\matlab algorithm\images\new\gray.m
Error in images.internal.imageDisplayValidateParams (line 45) common_args.Map = gray(256);
Error in images.internal.imageDisplayParseInputs (line 78) common_args = images.internal.imageDisplayValidateParams(common_args);
Error in imshow (line 241) images.internal.imageDisplayParseInputs({'Parent','Border','Reduce'},preparsed_varargin{:});
Error in gray (line 6) imshow(myimage); title('Gray Scale Image');

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Shahrin Islam
Shahrin Islam on 27 Jul 2018
In first comment I have attached the code and file and in the second comment I mentioned the code error. Please help me.

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