Errata and Omissions
This page records known issues with both Modern Photoshop Color Workflow and Photoshop LAB Color, Second Edition, as well as supporting materials, with resolutions indicated when available.
12 April 2013, early versions of Photoshop only: a reader reports that the Sharpen 2013 action doesn’t delete all scratch channels correctly. The reader is using Photoshop CS3, and therefore is not using the PPW panel but rather the Actions palette to invoke the action. Resolution: The action accesses a command that is not implemented in Photoshop CS3 (and possibly CS4, and presumably older versions). A new version of the action that bypasses the issue was posted in the appliedcolortheory newsgroup on 17 April and is now available here as well. Again, this is only needed by people with older versions of Photoshop. Anyone using the PPW panel is unaffected.
10 November 2016. We are not aware of any issues with the panel, which now runs in any version of Photoshop between CS5 and CC2017. Many user-specific actions can cause problems, however. If you need to troubleshoot a panel issue, click here for Photoshops CC2014-CC2017 or here for Photoshops CS5, CS6, and CC (original).
MODERN PHOTOSHOP COLOR WORKFLOW
23 April 2014, a reader is unable to open the file CH03 Fig 3-12 sm-hockey. Resolution: The file is missing the appropriate .jpg suffix, which the reader was advised to add manually.
3 April 2013, a reader points out that the original Grand Canyon image that opens Chapter 4 is missing from the downloadable chapter resources. Resolution: 3 May 2013, a revised download is now available.
8 August 2013, on p282 a reference to removal of halos incorrectly states the Figure that shows the problem. It is Figure 10.19B, not 10.19A.
3 July 2014, a reader complains of lack of clarity on page 292 in my description of how to produce a two-layered file in which the top layer has been multiplied three times. As this is in the advanced section there is some question as to whether a fuller explanation is needed. However, for completeness, here are four of the many ways to accomplish this, starting with a single-layered file.
1) Duplicate the background layer, than Image: Apply Image to the duplicate, source being itself, mode Multiply. Then repeat the Apply Image with the same settings.
2) Duplicate the background layer, then Image: Apply Image to the duplicate, source being the background, mode Multiply. Then repeat the Apply Image twice, using the same settings.
3) Duplicate the background layer, then change the duplicate’s mode to Multiply. Add two more duplicates of the duplicated layer, for a total of three new layers each set to Multiply. Use the PPW panel to Add Composite Layer, then delete the three multiplying layers.
4) Duplicate the background layer, then change the duplicate’s mode to Multiply. Add two more duplicates of the duplicated layer, for a total of three new layers each set to Multiply. Duplicate the background layer one more time, placing it beneath the three multiplying layers in Normal mode. Turn off visibility to the background layer itself. Then Layer: Merge Visible, and restore visibility of the background layer.
8 May 2013, on p333 a reference to “Postcard 12.15″ should read “Postcard 12.14″.
27 November 2013, on p402 a recommendation as to noise reduction has been changed; read about it here.
10 November 2016, in the first column of p412 the two references to Figure 15.4C should change to Figure 15.3C. The references to Figure 15.4C in the second column are correct.
Notes & Credits
1 May 2013. On p432, Review and Exercises section for Chapter 4, the answer to the fourth question originally posed on p90 is missing. Here’s the substitute:
Q. Why should we be cautious about blending the red or the blue into the green?
A. The blue and red channels are always noisier, so blending one of them into the green—which is the most important contrast channel—needs to be done carefully if at all.
3 May 2013. On p434, Review and Exercises section for Chapter 8, the answer to the third question originally posed on p204 is missing. Here’s the substitute:
Q. After the Darken Sky action runs, why does the Channels palette show five channels (in addition to the RGB composite) rather than four?
A. The action adds an alpha channel to the original three RGB. But the alpha channel is loaded as a layer mask, which counts as a fifth one. The fourth and fifth channels are, for the moment, identical.
20 April 2013. On p435, Review and Exercises section for Chapter 10, the third bulleted item doesn’t belong there. No text is missing, and the statement is accurate enough, so there’s no harm.
PHOTOSHOP LAB COLOR, SECOND EDITION
8 October 2015. In the curves orientation box on p157, the top graphic is mischaracterized. It is an LAB curves adjustment layer using the interface introduced in Photoshop CS4, with the Photoshop default (for RGB and LAB, that is) of darkness to the left. Beneath it, a curve that would be applied to the mask on that adjustment layer defaults to darkness to the right.
19 October 2015. On page 128, second paragraph, reference is made to a downloadable figure that allows one to experiment with how different L values affect the gamut of printable colors. The correct number is Figure 2.6.
28 July 2015. On p188, Figure 8.1B is mislabeled as 8.2A.