Re: Perl Hashes in C?

Is there a sample image on the Internet that demonstrates your requirements?

The mathematics of your problem can't be duplicated easily, but an image that demonstrates your actually problem could give those of us with a math background the ability to test for a better solution.

BrowserUk solution is excellent, but without data representing your problem, we're just guessing!

Regards...Ed

"Well done is better than well said." - Benjamin Franklin

Comment on Re: Perl Hashes in C?

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Re^2: Perl Hashes in C? by Anonymous Monk on Aug 13, 2015 at 04:20 UTC
Ed, I am exploring alternate color spaces, bizarre processes and different printing options. I like the ProPhoto colorspace and find that I have many fewer problem spots when I use it; less burnouts, fewer jet black holes and better skin tones. A large percentage of the photo establishment insisting that no camera, monitor, printer or eyeball can see anything other than sRGB. It's easier to print, everything looks the same everywhere, the least common denominator makes your life easier. HOGWASH! I suspect that these people are keeping MacDonalds in business because it tastes the same everywhere. I am building analytic tools to measure the degradation that occurs with 20-year-old color spaces from a formerly large, low quality software empire. I don't know if you will be able to see this but it is a fairly colorful picture minimally processed in both ProPhoto and srgb, converted to 16bit/channel raw, subtracted by the uint16 and normalized. There is a mountain of difference. <<Link>> https://picasaweb.google.com/lh/photo/u4_oeKwuv6vXjOQesjBQri_P6Kt2i5G4X9d1GVZOYtg?feat=directlink This is one of the reasons I wanted this tool. I need to do zillions of these and 2 hours each was objectionable. These Perl hashes are astonishing in their raw power on big data. Crusading for Better Color, BrianP	[reply]

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Re^2: Perl Hashes in C?
by Anonymous Monk on Aug 13, 2015 at 04:20 UTC

Ed,

I am exploring alternate color spaces, bizarre processes and different printing options. I like the ProPhoto colorspace and find that I have many fewer problem spots when I use it; less burnouts, fewer jet black holes and better skin tones.

A large percentage of the photo establishment insisting that no camera, monitor, printer or eyeball can see anything other than sRGB. It's easier to print, everything looks the same everywhere, the least common denominator makes your life easier.

HOGWASH!

I suspect that these people are keeping MacDonalds in business because it tastes the same everywhere. I am building analytic tools to measure the degradation that occurs with 20-year-old color spaces from a formerly large, low quality software empire.

I don't know if you will be able to see this but it is a fairly colorful picture minimally processed in both ProPhoto and srgb, converted to 16bit/channel raw, subtracted by the uint16 and normalized. There is a mountain of difference.

<<Link>> https://picasaweb.google.com/lh/photo/u4_oeKwuv6vXjOQesjBQri_P6Kt2i5G4X9d1GVZOYtg?feat=directlink

This is one of the reasons I wanted this tool. I need to do zillions of these and 2 hours each was objectionable. These Perl hashes are astonishing in their raw power on big data.

Crusading for Better Color,

BrianP

[reply]