Mike Chaney's Tech Corner

Mike's Software => Profile Prism => Topic started by: CHoffman on May 31, 2021, 02:39:59 PM

Title: IT-8 Target 1&2
Post by: CHoffman on May 31, 2021, 02:39:59 PM
1) My Red River factory profile produces a wider gamut in the green than my Profile Prism efforts. My target has been stored well, but is 15 years old! I have a pretty good T/R densitometer (Xrite 811, I think). Can I measure my target and compare the results to the matching text file to determine if it's faded? What's the organization of the file? Can I create a new one myself?

2) I've seen some PR stuff on targets with wider range. Would something like that deliver a better profile? (If I could afford it!) My scanner is an Epson 4490 Photo. I think it's decent, but could it be causing a lack of gamut in the green? Maybe I have problems with other colors, but right now I'm fixated on green. FWIW, I like the results of my Profile Prism profiles better than factory in every area except for the green limitation.

Title: Re: IT-8 Target 1&2
Post by: admin on June 01, 2021, 10:40:00 AM
It may be a limitation of using a scanner with a fluorescent light source.  Those can cause metamerism since the light source is not full spectrum.  Scanners with LED light sources produce a more consistent result.


Title: Re: IT-8 Target 1&2
Post by: CHoffman on June 01, 2021, 02:39:03 PM
Interesting! It does have a florescent source. I'll see what the big scanner/copier at work has and see if I can use that. My control over what it's doing is more limited but being new, I bet it uses LEDs.