how can i use image which is save in variable?

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romasha 2014-1-21

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https://ww2.mathworks.cn/matlabcentral/answers/113197-how-can-i-use-image-which-is-save-in-variable

评论： romasha 2014-1-22

in the following code i wanted to use gray image which saved in variable b for further use,but it gives an error "undefined b" on second line... kindly sort this out

CODE:

i=imread('C:\Users\Romesha\Desktop\eye.jpg');
b=rgb2gray(i);
imshow(b);
im = imread(b);
imshow(im);

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Walter Roberson 2014-1-21

在 MATLAB Online 中打开

Good catch, Bruno. I got sidetracked by the "undefined b".

But to be more correct, you can use a variable in imread(), but it needs to be a variable that contains a string. For example,

F = 'C:\Users\Romesha\Desktop\eye.jpg';
im = imread(F);

romasha 2014-1-22

this is the entire error message

* *Error in @(hObject,eventdata)gui('PB2_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback* * *

and respected sir i know the above answers already and i want to use that image which is store in variable b so how can i give the path of that image "im=imread(i want gray image which save in variable b in this paranthesis)"

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