Base Color Result Color Difference Color Base Color Difference Color Result Color in Software

Generator Code-39 in Software Base Color Result Color Difference Color Base Color Difference Color Result Color

Figure 7-13: Difference blend mode calculates the difference in hue between the layer in this mode and the layer(s) beneath it

make dramatic video clips by changing the position of the blend layer s contents or the base layer s visual content over time

If the two colors are exactly the same, the result your view of the composition will be black, no difference If the two colors are on exactly opposite sides of the color spectrum, the result will be white

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As shown in Figure 7-14, the glass of the blender is blue and the bananas outside of the glass area are completely unsaturated, color neutral, white in some areas But where the bananas coincide with the blue glass, the result is yellow, the difference between white and blue

In Figure 7-14, notice that the bottom layer s background is apparently unaffected by the Difference layer s color content All underlying layers are affected by the top layer s blend mode; however, the background behind the blender s glass was selected and tinted a neutral color, so the audience doesn t see any effect Read 5

You can create an effect similar to Difference mode with Exclusion, which lowers the contrast of the affected layer(s), but still produces the psychedelic inversions of Difference mode Blending with white inverts the base color values, and blending with black produces no change

Figure 7-14: Create dramatic changes using Difference blend mode and different base and blend colors

The remaining blend modes on the drop-down list on the Layers panel are terrific for performing significant edits to images, and they are quite straightforward Hue, Color, and the other modes covered in the next sections only modify one color attribute based on the HSL color model such as saturation In contrast Color Burn or Overlay alter both saturation plus brightness, begging some guesswork on the user s part

Saturation is the presence of hue, so you cannot expect Hue blend mode to add color to areas that lack saturation

The Hue blend mode will do absolutely nothing to underlying layer image areas that have no Saturation, but has a great effect on areas with adequate saturation and medium brightness Hue blend mode is therefore ineffective at

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hand-tinting grayscale images, but you can turn this to your advantage when you have a photo with a combination of saturated and dull image areas The design possibilities for Hue blend mode are only limited to your imagination: you can change the color of leaves in a nature scene while leaving dull tree bark and rocks unchanged You can also remove the saturation from image areas if you paint with white on the Hue blend layer:

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Choose an image that has both unsaturated areas and colorful areas Click the Create A New Layer icon on the Layers panel to create a new layer on top of your original photo Choose Hue from the blend mode drop-down list on the Layers panel Click the Gradient tool on the Tools panel, then on the Options bar, click the presets pop-up arrow and click the Spectrum preset gradient Click the Radial Gradient style button to the right of the presets pop-up, drag the cursor from the area in your photo where there is little saturation to an area of more colorful visual content, and then release the mouse button If you re unhappy with the result, repeat this step: you don t have to erase your current layer or create a new one When a gradient has no transparency in it, you overwrite the layer s pixels Figure 7-15 shows a beautiful, dreamlike image as a result of using Hue blend mode in combination with an appropriate photograph