imshow() black for max value and white for min value?

From the reference: https://www.mathworks.com/help/images/ref/imshow.html#bvmnrxi-1-DisplayRange

If you specify an empty matrix ([]), then imshow uses a display range of [min(I(:)) max(I(:))]. In other words, the minimum value in I is black, and the maximum value is white.

If I is data type single or double, then the default display range is [0, 1].

In my project, my I is a double (20 x 10), and I would like to show the minimum value in I is white, and the maximum value is black instead. Is there a way to do it?

Thank you.

Answer 1

[Stephen23]

Assuming that the image array A contains values in the range 0-1:

imshow(1-A)

[Milk]

Thank you Stephen. One question, why do we do a (1-A)? To inverse the value?

[Stephen23]

"To inverse the value?"

Yes.

[Milk]

Thank you :)