spektrafilm tech discussions

[hanatos (jo)]

dunno about engineer or not, but glenn wrote some pretty comprehensive posts on the topic:

The Quest for Good Color - 1. Spectral Sensitivity Functions (SSFs) and Camera Profiles

If you've read my Article: Color Management in Raw Processing, you'll know that the whole color management chain starts with a profile describing the camera's tonality and color representation. This profile is essential to the chain, as the chain is a set of transforms that take the image from one colorspace and tone to another, and the first transform in the chain needs to know where the camera-produced data is in terms of color and tone. Tone from most modern cameras is "linear", that is, …

The Quest for Good Color - 2. Spectral Profiles "On The Cheap"

Note: This post is a follow-up to The Quest for Good Color - 1. Spectral Sensitivity Functions (SSFs) and Camera Profiles. A lot of terminology was established in that post, so reading it first will help in understanding the missive below… The economics of using spectral data for camera profiles is rather vexing. The predominant research, and the general opinion of the major practitioners, is that individual captures of monochromator-sourced single wavelength light is the best way to measure …

The Quest for Good Color - 3. How Close Can IT8 Come to SSF?"

Note: This post is a follow-up to The Quest for Good Color - 2. Spectral Profiles "On The Cheap" and The Quest for Good Color - 1. Spectral Sensitivity Functions (SSFs) and Camera Profiles. You might want to read forward from the first post to understand what I’m doing here… As I review the results of my Rube Goldberg approach to characterizing a camera’s spectral sensitivity, I’m also becoming sensitive to how far an individual would want to go in pursuing better camera profiles than the good…

and since not everybody has access/skills to build such a device, vkdt has a utility that guesses ssf from dcp: vkdt: utilities to create input device transforms