Search found 4236 matches

by jsachs
October 25th, 2009, 7:12 am
Forum: Picture Window Support
Topic: Printing on transparancies
Replies: 6
Views: 4552

Re: Printing on transparancies

You can also use the Composite transformation, setting the Overlay to the solid color you want the background to be. Set the input image mask to cover the region you don't want covered and set the Overlay Amount to 100% (or less if you want the background to show through the solid color partially.
by jsachs
October 8th, 2009, 7:20 pm
Forum: Picture Window Support
Topic: Three Stage Sharpening
Replies: 17
Views: 14565

Re: Three Stage Sharpening

See the latest version of Sharpen.pdf for a detailed explanation of bilateral sharpening.
by jsachs
October 2nd, 2009, 3:36 pm
Forum: Picture Window Support
Topic: unexpected mask tool behavior
Replies: 7
Views: 5786

Re: unexpected mask tool behavior

I can't make it fail here. Please make sure the cursor changes to diagonal arrows before you drag - otherwise it is easy to drag the interior which moves everything or one of the edges.
by jsachs
September 26th, 2009, 11:06 am
Forum: Picture Window Support
Topic: Macbeth Colour Checker and Illumination temperature
Replies: 11
Views: 9183

Re: Macbeth Colour Checker and Illumination temperature

The Macbeth patches are defined in terms of CIE XYZ coordinates. From these coordinates, their appearance in any color light can then be computed. By transforming according to the gamma, white point and primaries of the color space, theoretical RGB values can then be computed.
by jsachs
September 26th, 2009, 10:03 am
Forum: Picture Window Support
Topic: High ISO Digital Monochromic [BW] Imaging
Replies: 26
Views: 18240

Re: High ISO Digital Monochromic [BW] Imaging

You might want to experiment with Transformation/Special Effects/Halftone with a custom mezzotint screen.
by jsachs
September 26th, 2009, 10:00 am
Forum: Picture Window Support
Topic: Macbeth Colour Checker and Illumination temperature
Replies: 11
Views: 9183

Re: Macbeth Colour Checker and Illumination temperature

Each color space has its own white point as defined the profile.
by jsachs
September 20th, 2009, 9:58 am
Forum: Picture Window Support
Topic: Reducing Chroma noise
Replies: 2
Views: 3265

Re: Reducing Chroma noise

You could try this:

1) Blur the original image A to produce blurred image B.
2) Split A and B into their respective HSV or HSL channels
3) Combine the V or L channel from A with the H and S channels from B.
by jsachs
September 12th, 2009, 10:07 pm
Forum: Picture Window Support
Topic: Print to image dimensions - unwanted cropping
Replies: 2
Views: 3091

Re: Print to image dimensions - unwanted cropping

There is nothing in PWP that would do something different if Photo Enhance was selected so my guess is that this is a bug in the Epson printer driver which for some reason does not affect some other programs.
by jsachs
September 4th, 2009, 1:12 pm
Forum: Picture Window Support
Topic: PRINTER/MONITOR CALIBRATION
Replies: 2
Views: 3153

Re: PRINTER/MONITOR CALIBRATION

It is a common problem, even with color management to have blues come out either too purple or too cyan since light saturated blues are usually in the monitor gamut and outside the printer gamut. Reducing the saturation of the blues may help. Otherwise it may be necessary to tweak the blues using Tr...
by jsachs
August 31st, 2009, 9:44 pm
Forum: Profile Mechanic Announcements and Support
Topic: PM-Scanner can't read Target Image File
Replies: 1
Views: 11923

Re: PM-Scanner can't read Target Image File

There are many different variations of TIFF. PWP has been updated to support more of these variants than PM so the older code in PM is probably having a problem with the type of TIFF file Epson Scan is writing. You may get PWP to read Epson Scan's TIFF files if there are various options for saving t...