Asher Kelman
OPF Owner/Editor-in-Chief
Not often do "experts" give things away. One of the things we treasure is the sincere colleagial approach we have nurtured here. We have no gurus, just exchange. It's that simple.
So when we see a guesture of kindness to other photographers, I'd like to say thanks!
Uwe Steinmueller has gotten together with input from Jack Flesher and brought the LAB output printing target of Bill Atkinson to the common world of our RGB set up (albeit CMYK) printers from Epson, Canon, HP and more. Printers do not necessarily behave with each paper batch and ink set exactly as expected.
Viewing conditions and staring at the screen can alter perception. Photometry is important but perception needs a real print! There's a whole train of remapping and assumptions that are at work in choosing inks to build a paticular dot on your print. That's the world of mathematics. Still the result has to work with our eyes and brains.
It's valuable, therefore, to have a standard reference file to be able to check the images have no failure in rendering.
This file offers a number of unique advantages as explained by Uwe:
The great thing is that the file is available for download free of charge!
Thanks guys!
So when we see a guesture of kindness to other photographers, I'd like to say thanks!
Uwe Steinmueller has gotten together with input from Jack Flesher and brought the LAB output printing target of Bill Atkinson to the common world of our RGB set up (albeit CMYK) printers from Epson, Canon, HP and more. Printers do not necessarily behave with each paper batch and ink set exactly as expected.
Viewing conditions and staring at the screen can alter perception. Photometry is important but perception needs a real print! There's a whole train of remapping and assumptions that are at work in choosing inks to build a paticular dot on your print. That's the world of mathematics. Still the result has to work with our eyes and brains.
It's valuable, therefore, to have a standard reference file to be able to check the images have no failure in rendering.
This file offers a number of unique advantages as explained by Uwe:
Uwe Steinmueller said:
- Can be printed as is on Letter sized paper
- ProPhoto RGB and not LAB mode (some new printer plugins cannot print from LAB)
- 16 bit
- Some new elements (printer black/highlight test ramp by Uwe Steinmueller)
- New B&W test image by Jack Flesher
- Large black patch to easily measure the dmax
- Pure white close to the border to check the influence of Gloss Enhancers
The great thing is that the file is available for download free of charge!
Thanks guys!
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