Search found 4231 matches

by jsachs
May 19th, 2009, 6:07 pm
Forum: Picture Window Support
Topic: Adventures in Wide Space
Replies: 8
Views: 7760

Re: Adventures in Wide Space

The problem with using too small a gamut is saturation clipping, not brightness clipping.
by jsachs
May 19th, 2009, 11:35 am
Forum: Picture Window Support
Topic: Adventures in Wide Space
Replies: 8
Views: 7760

Re: Adventures in Wide Space

This is exactly why I don't recommend using super-wide color spaces - most colors are compressed into a small area and there are not enough bits to avoid posterization which is exactly what you are seeing. Chrome 2000 was designed to just capture the entire gamut of slide film. Unfortunately I have ...
by jsachs
May 18th, 2009, 1:26 pm
Forum: Picture Window Support
Topic: Behaviour of the Colour Correction dialogue
Replies: 4
Views: 4991

Re: Behaviour of the Colour Correction dialogue

It comes back again if you click on a control point. The value can be different for each control point.
by jsachs
May 18th, 2009, 8:07 am
Forum: Picture Window Support
Topic: TFT monitor
Replies: 17
Views: 16856

Re: TFT monitor

While I don't have one, the Apple Cinema display is supposed to be very good and should work on a PC if you have a DVI connector. I bought a Dell 2009W a year or so ago and am not very happy with its off-axis viewing which is much worse than the Cinema display. Maybe the newer Dells are better.
by jsachs
May 18th, 2009, 8:00 am
Forum: Picture Window Support
Topic: TIFF and LZH and ZIP compression
Replies: 2
Views: 4204

Re: TIFF and LZH and ZIP compression

It can be proven mathematically that there is no compression scheme that will not enlarge some files. Both LZW and ZIP depend on finding repeating patterns within the image which may be few and far between for noisy images. They compress the most on very soft images or images with large blocks of so...
by jsachs
May 9th, 2009, 7:29 pm
Forum: Profile Mechanic Announcements and Support
Topic: 64 bit computer
Replies: 4
Views: 17031

Re: 64 bit computer

I don't think so, but I haven't tried it. I seriously doubt if the drivers for the colorimeter will not install.
by jsachs
May 5th, 2009, 9:54 am
Forum: Picture Window Support
Topic: Transformation Brightness Curve
Replies: 3
Views: 5292

Re: Transformation Brightness Curve

Thanks, I have fixed this for the next maintenance release.
by jsachs
May 3rd, 2009, 5:57 pm
Forum: Picture Window Support
Topic: Advanced Sharpening not available any more in PWPro 5.0?
Replies: 4
Views: 6326

Re: Advanced Sharpening not available any more in PWPro 5.0?

Sounds like you downloaded the standard and not the pro version.
by jsachs
May 2nd, 2009, 1:37 pm
Forum: Picture Window Support
Topic: Masking and 2-Zone and 3-Zone transformations
Replies: 4
Views: 6734

Re: Masking and 2-Zone and 3-Zone transformations

Not within the tranformation - as with any transformation you can create a mask manually and use Composite to blend the transformed image back into the original image with the mask to restrict the effect to certain areas.
by jsachs
May 2nd, 2009, 6:13 am
Forum: Picture Window Support
Topic: Bilateral Sharpen experiences
Replies: 3
Views: 5488

Re: Bilateral Sharpen experiences

There is an extensive discussion of bilateral sharpening in the updated white paper Sharpen.pdf.