Colour recovery [Was: Regex and more! [Was: Crossword puzzle]]

Thanks for that info Richard. I must admit I was mainly interested
because I have some old colour pics and slides that have seriously
degraded (especially 30-year-old Ectachrome slides taken when I was
foolish and ignorant enough to use it instead of Kodachrome).

From what I gather, your technique depends on "clues" in the recorded
image(s), so wouldn't be of much use to me? :-(

[But I admit I haven't yet followed *all* the links on that site.]

Cheers, Phred.

 

The process relies on residual chroma information retained on
cine-recorded colour TV programs, so it's of no use for film.

Personally, I recover faded photos by scanning them (with as many bits
per colour channel as possible), then re-levelling R,G & B in Photoshop
(16 bit mode). It gives you a pretty good result, & with some tweaking,
an excellent result - even on badly faded colour prints dating back to
the 70's.

 

[CLBM dropped from followups; aus.computers added]

The process relies on residual chroma information retained on
cine-recorded colour TV programs, so it's of no use for film.

Personally, I recover faded photos by scanning them (with as many bits
per colour channel as possible), then re-levelling R,G & B in Photoshop
(16 bit mode). It gives you a pretty good result, & with some tweaking,
an excellent result - even on badly faded colour prints dating back to
the 70's.[/QUOTE]

Thanks for that advice Bob. Have you tried that approach with slides?
I guess it should work the same, but a problem could be scanning
slides with sufficient resolution without going to an expensive
dedicated slide scanner. (Do those still exist? I haven't seen
mention of them for a few years now, not even ads. Perhaps like so
much else, they have succumbed to the mediocrity of the masses?)

Cheers, Phred.

 

Bob Larter's legal name: Lionel Lauer
Home news-group, an actual group in the "troll-tracker" hierarchy:
alt.kook.lionel-lauer (established on, or before, 2004)
Registered Description: "the 'owner of several troll domains' needs a group where he'll stay on topic."

<http://groups.google.com/groups/search?hl=en&num=10&as_ugroup=alt.kook.lionel-lauer>

"Results 1 - 10 of about 2,170 for group:alt.kook.lionel-lauer."

 

It would only be rubbish if it weren't true.


Bob Larter's legal name: Lionel Lauer
Home news-group, an actual group in the "troll-tracker" hierarchy:
alt.kook.lionel-lauer (established on, or before, 2004)
Registered Description: "the 'owner of several troll domains' needs a group where he'll stay on topic."

<http://groups.google.com/groups/search?hl=en&num=10&as_ugroup=alt.kook.lionel-lauer>

"Results 1 - 10 of about 2,170 for group:alt.kook.lionel-lauer."

 

Don't mind the troll, Phred, he always follows up my posts with this
rubbish. ;^)

 

*belch*

 

Phred expounded in

My wife and I just bought a small unit for $80 Cdn at Costco.
You can use it via USB, or just in your lap in front of the TV,
scanning into a memory stick. 5.x MP full colour scanned images.

Scan is more of a 0.5 second "picture take", since there is no
moving parts. You just advance the tray manually for the next
slide (or negative). It's quick compared to a scanner. You
spend all your time loading/unloading the slide tray.

Warren