Problem with image processing using edge detection

2018 7 27
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更新时间：2018 7 27
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0 个投票

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.

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KALYAN ACHARJYA
KALYAN ACHARJYA 2018-7-27
编辑：KALYAN ACHARJYA 2018-7-27
Share the image and your code
Shahrin Islam
Shahrin Islam 2018-7-27
% 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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KALYAN ACHARJYA
KALYAN ACHARJYA 2018-7-27
编辑：KALYAN ACHARJYA 2018-7-27

1 个投票

%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');

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Shahrin Islam
Shahrin Islam 2018-7-27
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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0 个投票

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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Shahrin Islam
Shahrin Islam 2018-7-27
Thank you so much for your response. The main problem is my code runs and shows the outputs. But after sometime it just doesn't work and says the problem is in 'imshow' command. But unfortunately I don't find any problem there so I don't know what to fix.
Diwakar Ravichandran
编辑：Diwakar Ravichandran 2018-7-27
Would you mind sharing your code? Or the error message that you received
It can help reproducing the issue
Shahrin Islam
Shahrin Islam 2018-7-27
% 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 2018-7-27
>> 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 2018-7-27

0 个投票

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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