Search found 8 matches

by patdavid
2014-06-18T07:35:01-07:00
Forum: Users
Topic: Hald CLUT
Replies: 24
Views: 33388

Re: Hald CLUT

Nope. Wrong again. Back where I started. Any information would be appreciated but I won't hold my breath. Thanks. s. I'm not 100% sure, but I have been playing with these hald cluts for a while now, so I feel your pain about file size! :) I do have a theory about the identity hald clut file size, t...
by patdavid
2013-11-26T13:15:36-07:00
Forum: Users
Topic: Mean Average Cumulative (~5800 frames)
Replies: 2
Views: 2448

Re: Mean Average Cumulative (~5800 frames)

After looking at a newer version of IM, it appears that -poly may be what I'm looking for? So if I have a frame 4, that is the mean average of all frames up to (and including 4), I can then add frame 5 to the cumulative average through the coefficient weighting in -poly? (ie: upto4.png 5.png -poly &...
by patdavid
2013-11-26T12:54:23-07:00
Forum: Users
Topic: Mean Average Cumulative (~5800 frames)
Replies: 2
Views: 2448

Mean Average Cumulative (~5800 frames)

Hi all! I've been doing some mean averaging of different stuff for a while now using IM, and I had a question I hoped some guru could help me solve. I have a few music videos that I've dumped all of the frames for, then batch mean averaged all of the frames to produce a final mean average output of ...
by patdavid
2013-09-05T08:34:26-07:00
Forum: Users
Topic: Extracting HSL shift from base image to new
Replies: 10
Views: 5963

Re: Extracting HSL shift from base image to new

snibgo wrote:Here we go. With luck, I won't lose this one. A Windows script (that I call whatMod.bat).
I wanted to drop in and thank you very much for taking the time to do this!

The script crashes my IM for some reason, but I've gotten exactly what I need to do it manually out of your script, so thank you.
by patdavid
2013-09-04T10:52:50-07:00
Forum: Users
Topic: Extracting HSL shift from base image to new
Replies: 10
Views: 5963

Re: Extracting HSL shift from base image to new

Yes, it is one way, and I found it successful. (I wish I could find my code!!) From very vague memory: 1. Find the HSL difference between images A and B. This gives approximate parameters for "-modulate", to transform A to B. This is the black magic part for me. Is there a method for acco...
by patdavid
2013-09-04T10:18:34-07:00
Forum: Users
Topic: Extracting HSL shift from base image to new
Replies: 10
Views: 5963

Re: Extracting HSL shift from base image to new

I've tried to solve a similar question: given corresponding colour patches in two images, what transformation from one makes the other? Sorry, I can't find my code. From memory, I needed to iterate to get the "-modulate" parameters, even when the only initial transformation was "-mod...
by patdavid
2013-09-04T09:32:12-07:00
Forum: Users
Topic: Extracting HSL shift from base image to new
Replies: 10
Views: 5963

Re: Extracting HSL shift from base image to new

So, if I had an image that I know to be some pure red color ( rgb(255,0,0) ), and a second image identical in all ways, except there has been an HSL shift of some sort, there's not a way for me to determine what that shift was? (Sorry if I'm dense, just trying to understand a path forward).
by patdavid
2013-09-04T08:23:22-07:00
Forum: Users
Topic: Extracting HSL shift from base image to new
Replies: 10
Views: 5963

Extracting HSL shift from base image to new

Hi all, I'll get right to it... I've got a base image that I apply some color modifications to (namely, HSL shifts, and then RGB curve shifts). I'd like to find a way to extract the shift values between the base/identity image, and the color modified version. For instance, I've got a HALD CLUT ident...