Increasing their size requires GIMP to invent new pixel information to fill the larger dimensions, which it obviously can’t do, so it just scales up the existing data. Raster images handle color gradients exceptionally well, and they can be easily generated by digital camera sensors, which makes them perfect for creating and editing digital photographs.īut because they are grids of pixels, increasing or decreasing their size can cause unexpected results. The difference in structure between raster images and vector images means that they each have their own strengths and weaknesses. Part of the reason this distinction can be unclear is that vector image formats aren’t very widely supported by web browsers or operating systems (with the exception of open standards like SVG and PDF), so vector images usually get converted into pixel formats like JPG and PNG. The exact shape of each object, the color of each shape, and the order in which the shapes overlap are all stored as equations instead of pixels. Vector images are composed of a series of mathematical equations that describe all elements in the image. In its most basic form, a raster image is a simple grid of information that describes the color and brightness of each pixel. Raster images are the most common form of digital image because they’re composed of pixels in a similar way to your output device (your monitor, in other words). If you’re new to the world of image editing, you might not have heard the terms raster image and vector image before – and there are even a few more experienced editors who could brush up on their terminology too.
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