View Single Post
Old 28th March 2005, 22:33   #5  |  Link
Didée
Registered User
 
Join Date: Apr 2002
Location: Germany
Posts: 5,389
Sorry to spoil the fun, but this does not enhance contrast. In contrary, it is reducing contrast, shifting all outer levels towards 128. The pleasing effect is only the brightening of the dark parts. Also, the histogram shows loss of tonalities, indicated by "spikes" in the histogram. Please check yourself with

interleave(a,last).histogram(mode="levels")

Then, blur(0.2,0.2) is not a simulation of a radius 10 gaussian blur. To simulate that, you'd need to replace that blur() with resize(33%).resize(100%)
__________________
- We´re at the beginning of the end of mankind´s childhood -

My little flickr gallery. (Yes indeed, I do have hobbies other than digital video!)
Didée is offline   Reply With Quote