Beginning Photoshop & Graphic Design

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  • Home
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QuickLINK to Lesson   00   FP   01   02   03   04   05   06   07   08   09   10   11   12   13   14   15
Lesson 8:   08-A   08-B   08-C   08-D

​​Lesson 8 - Objectives 4-5 (Tuesday) 

B08-04 Skill: Use adjustment layer presets

Objectives:
  • Know how to use adjustment layer presets
Learn:
Some of the adjustment layers come with a pre-defined set of presets.  They are the levels, curves, exposure, hue & saturation, black & white, channel mixer, and selective color adjustment layers.  The presets are worth exploring because they can give you an idea of some of the adjustments you can make with a particular layer adjustment.  
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Original photo by Nathan Smith
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Photo with hue/saturation adjustment layer using the cyanotype preset.

B08-05 Skill: Use brightness/contrast, levels, curves, exposure, and vibrance adjustment layers

Objectives:
  • Experiment and understand how to use the brightness/contrast, levels, curves, exposure, and vibrance adjustment layers
Learn and Apply:
As we work through each of the adjustment layers, the image on the left is the original, which you can click on and download to try on your own. Please do that! The image of the adjustment layer is in the center, which you can click for a larger view.  The image on the right is the adjusted image, which you can also click for a larger view.
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Brightness/Contrast:  This adjustment layer simply works with brightness and contrast sliders.  You can click on the public domain image at left, download it, and try it for yourself.  In this example, I've decreased the brightness and increased the contrast.
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Before getting into the levels and curves adjustment layers, it's important to understand histograms.  Please watch the video, "Photoshop: Introducing the Histogram Panel".

Histograms are bar charts of luminance values - values of light - from black to white. The chart helps you understand what is happening with light in an image or photo.

The levels and curves adjustment layers allow you to mess around and change those values.  You could make black pixels become grey or even white.  You could make white pixels become black. They provide a wonderful amount of "light control" over an image, and are some of the most powerful tools in Photoshop.
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Video: Photoshop: Introducing the Histogram panel | lynda.com tutorial (7:01)
Exercise B08-05 Levels
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Levels:  This adjustment layer is extremely powerful. You use the Levels adjustment to correct the tonal range and color balance of an image by adjusting intensity levels of image shadows, midtones, and highlights. The Levels histogram is a visual guide for adjusting the image key tones.  (Source) Watch the video "How to edit the histogram in Photoshop."  Then watch the demonstration video next. Download the image in the center (below) and try it yourself. Save your file as B08-05 Levels_Your_Name.PSD. This will be submitted in the lesson 8 exercises assignment.
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Video: How to edit the histogram in Photoshop | lynda.com overview (2:23)
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Original Photo: Click to go to source.
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Video: Demonstration of Levels adjustment layer
Exercise B08-05 Curves
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Curves:  This adjustment layer is even more powerful than levels. In the Curves adjustment, you adjust points throughout an image’s tonal range. Initially, the image’s tonality is represented as a straight diagonal line on a graph. When adjusting an RGB image, the upper-right area of the graph represents the highlights and the lower-left area represents the shadows. The horizontal axis of the graph represents the input levels (original image values) and the vertical axis represents the output levels (new adjusted values). As you add control points to the line and move them, the shape of the curve changes, reflecting your image adjustments. The steeper sections of the curve represent areas of higher contrast while flatter sections represent areas of lower contrast. (Source)  Watch the video "Easy ONE-CLICK Color Correction in Photoshop | Quickest Way To White Balance a Photo​". Then watch the demonstration video next.  Download the image in the center (below) and try it yourself. And if you're curious, here is another way to do this with the same image: Color Cast Removal, a YouTube demonstration by Tim Grey. Fix the photo using a curves adjustment layer. Save your files as B08-05 Curves_Your_Name.PSD. This will be submitted with the lesson 8 exercises assignment.
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Video: Easy ONE-CLICK Color Correction in Photoshop | Quickest Way To White Balance a Photo
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Original image: Click to go to source.
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Video: Demonstration of Using Curves (2:00)
Exposure:  This adjustment layer lets you correct the exposure of an image.  In this demonstration, I've used the mask to bring back some of the sky, first by selecting the sky with the quick select tool, then filling the selection with black on the mask.  I then went to the mask properties and lowered the density until the sky looked right.  Click on the original image at left, download it, and try it for yourself!
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Original image: Click to open source...
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Vibrance: Vibrance is different than saturation.  As you apply vibrance to an image, it begins by saturating the least saturated colors, and as you increase it further, it works up through the more saturated colors - saturating them even more.  Saturation works equally on every pixel in the image. ​Click on the original image at left, download it, and try it for yourself!
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Original Image: Click to open source...
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Optional resources to share with you! (Not required)

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Video: Photoshop Playbook: How To Use Curves (4:49)
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Video: Difference Between Levels and Curves in Photoshop (6:07)
QuickLINK to Lesson   00   FP   01   02   03   04   05   06   07   08   09   10   11   12   13   14   15
Lesson 8:   08-A   08-B   08-C   08-D

​This page was last updated February 22, 2021
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