MATLAB Answers

sha
0

Obtaining pixel value from image in GUI

Asked by sha
on 18 Oct 2012
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);
--------------
I would like to read the pixel value just like the given example. Please help!
Sha

  0 Comments

Sign in to comment.

3 Answers

Answer by Arthur
on 18 Oct 2012

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

  0 Comments

Sign in to comment.


Answer by manoj saini on 18 Oct 2012

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

  0 Comments

Sign in to comment.


Answer by Image Analyst
on 18 Oct 2012
Edited by Image Analyst
on 18 Oct 2012

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.

  5 Comments

sha
on 24 Oct 2012
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.
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
on 24 Oct 2012
Basically, i wanted my image to be like this:
using the colormap command. Any ideas?

Sign in to comment.