![]() ![]() ![]() So masking inside of Photoshop looks a little bit different in our layers palette is where were going to see our masks. Since raster images are pixel based, they are resolution dependent. Raster images are compiled using pixels, or tiny dots, containing unique color and tonal information that come together to create the image. Now lets just jump straight into opacity masks because theyre very similar to the way that illustrator handles them. These are the types of images that are produced when scanning or photographing an object. You can resize actual text without reducing the quality of that text, whereas resizing a raster image (such as a photo) will cause some reduction in quality. Jake Bartlett (07:42): Now lets jump into Photoshop and talk about masking techniques inside of this program. A good example of a vector shape would be the letters in a font. That is because a vector is defined by angles and curves rather than specific pixels. Your shape is now saved as a work path that can be used to create. Then, go to the Edit menu, and choose Define Custom Shape. Simply select the shape with the Selection tool, go to the Paths panel, and click on the Make Work Path option. One of the things that makes vector graphics unique and useful is that they can be scaled infinitely without reducing the quality of the shape. Converting a shape into a path in Photoshop is a quick and easy way to create custom shapes or text elements. More Detail: In a very general way, you can think of a layer mask as being composed of pixels (just like a photographic image) and a vector mask as being composed of a shape (such as a font or a geometric shape). However, there are certainly situations where a vector shape can serve as a good starting point for a layer mask or a vector mask. Tim’s Quick Answer: In most cases I would say that only layer masks (and not a vector mask) should be used in the context of a photographic image. We will continue working with the Digital Surface Model (DSM) raster for the NEON Harvard Forest Field Site. It also covers how to layer a raster on top of a hillshade to produce an eloquent map. Unlike raster graphics, vector images are resolution independent, meaning you and I dont have to worry about quality, pixels, resolution, or re-sampling. Today’s Question: What’s your opinion on the use of vector versus layer masks in general photo editing, and also the potential utility of combining both types of masks on a single layer? This episode covers how to plot a raster in R using the ggplot2 package with customized coloring schemes. ![]()
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