image and imagesc functions

hello evryone , i m starting using matlab and can't understand the diffrence between image and imagesc functions.

Answer 1

[Chad Greene]

The sc suffix simply means color-scaled. Type this into your command line and see:

open imagesc

The imagesc function calls image and specifies 'CDataMapping','scaled'.

[laksantini anas]

thanks Chad Greene, but can u clarify please what are these parameters?

[Chad Greene]

By default the image function assumes the gridded data you put into it is an image with values associated with how data are stored in image formats. But most real-life data measurements do not perfectly lie in the image data range 0 to 255, so imagesc scales the colormap to match the data. For example, try plotting the sample peaks data with image versus imagesc:

Z = peaks(500); 
subplot(121)
image(Z) 
subplot(122)
imagesc(Z)

[laksantini anas]

thank you so much Mr Chad Greene for your answers and the time you are giving to me. if it's possible can you tell me how the scale is working on the image.

[Chad Greene]

Glad to help, but that's about as much as I know. You've reached the end of my knowledge!

[laksantini anas]

thanks a lot you have already help me.