Gradient histogram

[mvmramos]

Hello all,

Can anybody tell me why the histogram for a gradient is not flat, as I guess it should be? Or, how to make a gradient that results in a flat histogram (that is, with the same number of pixels for each level)? The screen capture annexed should clarify the subject. Thanks in advance.

Regards,
Marcus.

 

[Steve]

The histogram shows that there is more 255 white and 0 black than any other individual value in between.
The gradient in loaded at both ends.

 

[mvmramos]

Sure, but how to make it look flat in the histogram? Or gradients in Photoshop are just like that?

 

[SCTRWD]

Check out my post http://www.photoshopgurus.com/forum...98-smooth-displacement-effect.html#post119864

One way to make clean black to white gradient:
Make Index color mode document, go to Image->Mode->Color Table dialog, choose Grayscale pallete and save it as a ACT file on disc. Find this file on disc and change it's extension to RAW.
Now open this file as raw image in PS. In Open dialog set Width - 256, Height - 1, Inteleaved - checked.
Now change the size of this image to 256x256 with Image->Image Size.

 

[mvmramos]

Perfect, thanks a lot!