LINES, CURVES, AND STROKES
While the last chapter dealt exclusively with techniques that change single pixels in either their position or color, we will now explore how units extending over and above the size of a single pixel can be created, and we will consider how they will be used in non-photorealistic renditions. We have already seen examples for such techniques in the last chapter—stippling and image mosaics; they were, however, based on altering the pixels of a given image. Here, the main focus is on constructing new images from units that extend the size of a pixel. The reason we explore this area is that it is indeed one of the fundamental characteristics of non-photorealistic images that their basic “building blocks” are often markings ...
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