Raster image is one of the two graphics types. Raster images are also call bitmap images because they are made by millions of tiny squares, called pixels. Each pixel or bit in the image contains the information about the colour displayed. Any image can be easily identifying a raster or bitmap image by looking at it very closely. If we zoom enough to the picture you will see the outlines of the each pixel all over the edges. Raster images have larger file size than the vector image. Higher Dots per inch(DPI) and Pixels per inch(PPI) takes large space as software must keep track of and also able to render every pixel. File size always be a concern if the storage is limited. Bitmap images have fixed resolution and it cannot be re sized without the losing quality. Common raster based formats are JPEG,GIF,TIFF,PNG,PICT and BMP. The raster image can be converting easily to another raster or bitmap image very easily. If we think about the quality of the raster image, we have keep in mind that raster graphics are resolution specific. That means raster images defined on specific resolution. The resolution can be defined in DPI(dots per Inch). The higher DPI will give better resolution. The better resolution however comes on price.Raster images Raster graphics are best for scanned artwork, detailed graphics, or for the digitized photographs. Non line art images are best as raster image because these include the undefined lines, shapes and complex composition. Raster files are typically larger than the vector files. Raster files are economical, slower to print, display, less versatile and more unwieldy to work with. Raster graphics are very easy to create. It is mostly being used by the photographer. The photo is taken in to the camera, scan and place it to the system. Raster images are less costly. It is easy to create unlike vector images. Data analysis is very easy. Raster graphics are best for creating the websites. Raster graphics and its formats can be used to add extra effects to the picture like blur texture etc. The most important draw back of raster image is, it cannot be scaled without losing the quality. If we try to enlarge the picture, it will lose their quality, or some part of the picture. The blur image blown up and individual squares and dots will come up on the image. Due to the limitation of raster image, vector image has taken place in everywhere. The conversion of image raster to vector has become harder.
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raster graphics, vector illustration, vector patterns, convert vector to raster,
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