The other difference is how 'zero' is handled
I just compared -contrast-stretch 0,1 and -linear-stretch 0,1 and you're right, -linear-stretch 0,1 makes no change to the blackpoint where -contrast-stretch 0,1 does.
I must have overlooked this when searching through the list of operators.
Thanks for ...
Search found 3 matches
- 2011-10-22T01:56:10-07:00
- Forum: Users
- Topic: contrast-stretch without blackpoint
- Replies: 5
- Views: 10818
- 2011-10-21T12:44:45-07:00
- Forum: Users
- Topic: contrast-stretch without blackpoint
- Replies: 5
- Views: 10818
Re: contrast-stretch without blackpoint
Thanks, i've tried it, it works very well, exactly what i needed..!
Although I'm still trying to understand why it works.. :)
Intuitively i would have expected: get the minimum value in the image, and then use: convert image -level minimum,100% result
Trying to wrap my head around this..
Thanks ...
Although I'm still trying to understand why it works.. :)
Intuitively i would have expected: get the minimum value in the image, and then use: convert image -level minimum,100% result
Trying to wrap my head around this..
Thanks ...
- 2011-10-21T06:47:00-07:00
- Forum: Users
- Topic: contrast-stretch without blackpoint
- Replies: 5
- Views: 10818
contrast-stretch without blackpoint
Hi all,
I'm trying to implement a contrast-stretch that stretches the whitepoint of an image to 100% but leaves the blackpoint alone.
For instance if the darkest point in an image is 30% white and the lightest point is 85% white, i want it to stretch from 30% to 100% (but not from 0% to 100%).
So ...
I'm trying to implement a contrast-stretch that stretches the whitepoint of an image to 100% but leaves the blackpoint alone.
For instance if the darkest point in an image is 30% white and the lightest point is 85% white, i want it to stretch from 30% to 100% (but not from 0% to 100%).
So ...