From the course: Digital Media Foundations

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Merging images with blend modes

Merging images with blend modes

From the course: Digital Media Foundations

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Merging images with blend modes

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- [Instructor] When you change the opacity of a pixel to reveal the pixel behind it, you're blending the combined color and luminance values of those two pixels together. In this default case, an amount of the background pixel is revealed, depending on the alpha channel level for the foreground pixel. Blend modes as used in Photoshop and a great many other applications use mathematics to combine the values of the foreground pixel with the pixel behind it, in a number of different ways. There's a long list of types of blend modes and they're usually grouped together to make it easier to manage them. Options to do with lightening pixels or darkening pixels are grouped together for example. When you choose no special blend mode, the default option is normal. Let's look at a couple of simple examples to illustrate the more advanced modes. Lighten mode simply means pixels in the foreground that are lighter than pixels in the background are displayed. If the background pixel is lighter that…

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