Question

I am trying to figure out why my black and white image, with values from 0-1.0 won’t be scaled correctly by an image(my_img) call.

I have tried the following:

• Setting colormap([0:0.0039:1; 0:0.0039:1; 0:0.0039:1]’)
• Setting clim for the gca to [0 1]
• Setting DataAspectRatio to [1 1 1]
• Changing ClimMode and DataAspectRatioMode to manual

What am I doing wrong? Matlab documentation states that images can be from [0 1.0]… Why won’t image() display it correctly?

Imshow works great BUT I am trying to achieve the same image as imshow for my own personal reasons using the image function.

Constantin

Answer 1

h=image(rand(250, 250));
set(h, 'CDataMapping', 'scaled');

imagesc() does this automatically, and in fact it was the source code of imagesc that gave me the correct property name to use.