Unsing ginput to reading pixel in graylevel image

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Sara am 14 Jul. 2021
Kommentiert: Image Analyst am 15 Jul. 2021
I wondered if anyone knows a function or method used to read the pixel values in an image. Here is what I mean. I have a gray-level image, and I can use the ginput function to select the coordinates. How can I use the ginput to read the intensity value in the gray image as "live" or before select the position? The reason for doing this, I want to know what is the highest intensity value that my ginput pointing to. As you know, some images gradient in the intensity value.
I was reading to the ginput code itself, but I only could change the arrow color instead of black to red. I could not understand or modify the code itself to read the intensity value when I point to the intensity area in the image.
  2 Kommentare
Sara am 15 Jul. 2021
Thank you for your answer.
I am sorry I was not clear about why I use ginput.
The image that I have is a bend close to the periphery. I want to plot the intensity profile for the column that is close to the periphery. I mange that, but I needed a more accurate way to select the coordinates.
Here is an attached for the image that I work on it. As you can see the image is bending.
I use the gunput to slelect 3 points (or more )in the clumns and plot the slection in the improfile funcation. Now I want to use ginput where is the highest intsity so that I can select it.
NOTE: The image is a colored map to show the intensity changing along with the columns.

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Image Analyst
Image Analyst am 14 Jul. 2021
Call impixelinfo():
impixelinfo; % Show "live" status bar on figure with (x,y) and RGB or gray scale.
  2 Kommentare
Image Analyst
Image Analyst am 15 Jul. 2021
You're welcome. Can you please "Accept this answer" if it worked for you.

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