Error adding Gaussian noise ( M must be a real scalar )

Question

lian jiajie 2021-2-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/752729-error-adding-gaussian-noise-m-must-be-a-real-scalar

回答： Keerthana Chiruvolu 2021-3-2

I am building an image processing application with App Designer and wanted to add noise to input image. Encountered this error message shown below

Got the error message when I do it this way :

            mean = app.MeanEditField.Value;
            variance = app.VarianceEditField.Value;
            temp = app.output_img.ImageSource;
    
            Noisy = imnoise(temp,'gaussian',mean,variance);

But works in this way :

Noisy = imnoise(temp,'gaussian',0.1,0.02);

The first way is simply grabbing the value entered from GUI and put them as imnoise arguments. It should work the same as the second way. Please, anyone can tell what's the issue in there.