Obtaining pixel value from image in GUI

Hi,

I would like to obtain a pixel value from any image using a GUI. i have made a few research. and this is all i get,

example:

----------

load flujet;

image (X);

colormap (jet);

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I would like to read the pixel value just like the given example. Please help!

Sha

Answer 1

[Arthur]

You could use imtool for that if you have the image processing toolbox.

Answer 2

[manoj saini]

plz type X(capital X) on command window...........all pixel value will be on front you

Answer 3

[Image Analyst]

You can call impixelinfo(), if you have the Image Processing Toolbox. This will put up a label in your figure that gives you the x,y (column, row) coordinates and the intensity value(s) of the image. Alternatively you can use ginput(1) to get a coordinate and use

grayPixelValue = imageArray(row, column);

to get the gray level in a gray scale image, or

rgbPixelValue = imageArray(row, column, :);
rgbPixelValue = impixel(imageArray, row, column); % Alternative way.

to get the red, green, and blue intensity values in an RGB image.

[sha]

I'm sorry, i guess i did not elaborate more. what i mean is that i needed to find the intensity of the image using the colormap command and place it in Gui.

Thanks for the answer guys! Pls help me again!

[Image Analyst]

The colormap command does not give you the intensity of the image.

[sha]

I think i get mixed up. Colormap does shows the contrast of the image. and i would like to do so on my picture. Please advice me in any ways..

Thanks.

[Image Analyst]

I don't know what that means. What do you consider to be the difference between "image" and "picture". To me, they're basically synonyms. Increasing the contrast on a picture or an image is the same thing.

[sha]

Basically, i wanted my image to be like this:

using the colormap command. Any ideas?