数字制图栅格与矢量的区别（The difference between raster and vector in digital mapping）.docVIP

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数字制图栅格与矢量的区别（The difference between raster and vector in digital mapping）.doc

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数字制图栅格与矢量的区别（The difference between raster and vector in digital mapping） Lattice diagram (Bitmap) (grid diagram) (1) what are the properties of dot matrix and dot matrix diagrams? In contrast to the following vector based drawing programs, an edit photo program like Photoshop is used to process bitmap images. When you deal with bitmap images, you can optimize minor details, make significant changes, and enhance the effect. A bitmap image, also called a dot matrix image or an image, consists of a single point called a pixel (picture element). These dots can be arranged and dyed in different directions to form a pattern. When you zoom in on the bitmap, you can see numerous individual blocks that make up the entire image. The effect of enlarging bitmap sizes is to increase the number of individual pixels, which makes the lines and shapes appear jagged. However, if you look at it from a slightly farther position, the color and shape of the bitmap image appear continuous. Since each pixel is individually dyed, you can generate realistic effects of approximate photos by operating selection regions at a frequency of one pixel each, such as increasing shadows and increasing color. Narrowing the bitmap size also causes the artwork to deform because it reduces the overall image by reducing pixels. Similarly, bitmap images can not be operated individually (such as moving) local bitmaps because bitmap images are created in an ordered collection of pixels. Bitmap images are related to resolution, which means that a fixed number of pixels is contained on a certain area of the image. Therefore, if the image is magnified on a screen at a larger magnification or printed at a low resolution, the jagged edge of the bitmap image will appear. In Figure 1, you can clearly see the contrast between 4 and 12 times the local image. Now lets take the photos below. For example, if we scan the picture into a file and save it, we can describe the file like this: how much the resolution is, how