i have double array and i want to rescale it in the range (0,1) and then convert it into jpg.how to do it?

i have double array and i want to rescale it in the range (0,1) and then convert it into jpg .how to do it?

Answer 1

[Walter Roberson]

mat2gray() followed by imwrite()

Note: true grayscale jpg are very uncommon in practice, but they have been valid for quite a while. They are not handled by some rather old browers (e.g., don't expect to display them easily in Windows XP time frame.)

In practice nearly all jpeg are RGB images.

Reminder: JPEG is a lossy image format, so if you expect to be able to read back in exactly what you wrote out, then you should use a different image format.