How to browse image in matlab and get error message if it is not grey scale image

Actually i need help in code as user to browse a grayscale image and displays the browsed image as well as its size. In case of RGB or binary image provided as input, the application must prompt the user to input grayscale image again.

Answer 1

[Gopichandh Danala]

Try this,

file_name = uigetfile('*.*');
imgInfo = imfinfo(file_name);
if strcmp(imgInfo.ColorType,'grayscale')
    display('This is a gray scale image');
    img = imread(file_name);
    figure, imshow(img,[]), title('grayscale image');
elseif strcmp(imgInfo.ColorType,'truecolor')
    errordlg('This is a true color image choose grayscale image');
elseif strcmp(imgInfo.ColorType,'indexed')
    errordlg('This is a indexed image choose grayscale image');
else
    errordlg('Incorrect file type choose grayscale image');
end

Let me know if this is what you want..

Good Luck

[Muhammad Danish]

Thnxx Gopichandh Danala for your answer.Will u show me this code in formate of matlab GUI if possible.

[Walter Roberson]

Use GUIDE to create a GUI with a button. Put the above code in the callback for the button.

[Muhammad Danish]

Thnxx Walter Roberson. I am new to matlab.Will u please help me in matlab code for generate negative of image,contrast value of image and average intensity value of pixel in the image.

[Gopichandh Danala]

I think u should post a detailed question on GUI with ur work so I can see and understand better, write whatever code wrote fr GUI and make a new question

[Walter Roberson]

For uint8 images,

negativeImage = uint8(255) - YourImage;

For average intensity, rgb2gray() and then mean2()