Photoshop Grab Bag: Crowd-Sourced Questions and How-To Answers

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Is trying to master certain aspects of Photoshop making you pull your hair out in frustration? The Event Space and expert Andy Graber are here to help. We are trying something new with this class: We are asking YOU to help us design the curriculum by interacting with us on social media. What aspects of Photoshop are you having trouble with? What is it you need to learn about? We want to know. Contact us on Facebook or Twitter to tell us. Please visit the "Photoshop Grab Bag" post on our Facebook page and post your questions or problems in the Comments section there. Or tweet us your questions using the hashtag #PSGrabBag. In advance of the class, we will choose a selection of your questions and build this workshop around them.

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How best to used the dusk removal filter.

Hello,

The best approach is sparingly as this will affect the entire image. For old family photo's, I make a duplicate copy layer so I have the original just in case. Open the dialog box [Filter > Noise > Dust & Scratches] and set the zoom to 100%.

Set the Threshold slider to 0 so that all pixels can be examined. The Threshold value determines how dissimilar the pixels should be before they are eliminated.

Move the Radius slider left or right, or choose a value from 1 to 16 pixels. The Radius determines how far to search for differences among pixels. Increasing the radius blurs the image. Use the smallest value that eliminates the defects to your liking.

Gradually increase the Threshold to the highest value that still produces the desired effect again to your satisfaction.

We wanted new siding on our house. To visualize the possibilities, we took photos of the house with the existing siding and trim, and the color swatches of the new siding, in the same light. We recorded the RGB values of the color swatches as seen in PS. We tried to change the colors of the existing siding and the trim to the new color RGB values. Nothing worked perfectly. We masked the siding and the trim separately in PS, then we tried COLORIZE in the HUE/SATURATION adjustment, but the old colors interfered when the illumination changed from bright to shadow. Curves adjustments of the RGB colors helped a bit. Sometimes, changing the blending mode to color, lighter color or darker color helped. But none of this completely eliminated the interference from the old colors. Any ideas???

Hello,

I would try Photoshops's "Match" and Replace"color commands. 

The Match Color command matches colors between multiple images, between multiple layers, or between multiple selections. It also lets you adjust the colors in an image by changing the luminance, changing the color range, and neutralizing a color cast. The Match Color command works only in RGB mode.

The Replace Color dialog box combines tools for selecting a color range with HSL sliders for replacing that color. You can also choose the replacement color in the Color Picker.

Replace Color lacks the Colorize option from the Hue/Saturation adjustment, which may be needed for a complete color change. You may also find the adjustment layer technique easier for changing specific objects. However, the Replace Color command is good for global color changes—especially changing out-of-gamut colors for printing.

There's no "best method" for re-coloring an object. Here are a couple of different methods:

Select the Quick Selection tool and create a selection for the object that you want to change the color. Then choose Refine Edge to improve the selection.

To change the color, go to Image>Adjustments>Hue/Saturation.

To improve the color, go to Image>Adjustments>Color Balance.

Adjust the colors from the 3 channels: Shadows, midtones and highlights.

Brush Tool method:

Select the Brush tool. Set the opacity to 100% and the flow to 30% then create a new layer. Next choose your color and brush over your object until you cover it entirely. Do not worry; you will then erase any unwanted areas. Then change the blend mode to hue.

Hello,

I do not use "Facebook or Twitter", can I just use my email account?

What I would like to see would be take each Menu bar item and what is under it and have a detailed discussion about it.. How would this item be used and how to use it in different areas of the Photoshop work flow.

Thanks for asking...