![]() If you remember back to your high school geometry, the equation for a circle of center ( h, k) and radius r is (x - h) 2 + (y - k) 2 = r 2. One of the greatest things about vector images is that you can re-size them infinitely larger or smaller, and they will still print out just as clearly, with no increase (or decrease) in file size. Generally speaking, vector images are made up of paths or line art that can infinitely scalable because they work based on algorithms rather than pixels. Instead of trying to keep track of the millions of tiny pixels in a raster image, vector images keep track of points and the equations for the lines that connect them. This is a common problem but can be remedied by using raster image editing programs such as Photoshop to change resolution and properly scale images.Ĭommon Raster Image Types: JPG, TIFF, GIF, PNG, BMP This is because we are stretching the pixels over a larger area, thus making them look less sharp. As you may have guessed, the more pixels in the image and the higher the resolution is, the higher quality the image will be.įor example, if we scale a raster image to enlarge it, without changing resolution, it will lose quality and look blurry or pixilated. The number of pixels that make up an image as well as how many of those pixels are displayed per inch, both determine the quality of an image. 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. These are the types of images that are produced when scanning or photographing an object. On the occasion of receiving a lifetime achievement award at the 2013 Webby Award ceremony, Wilhite rejected the hard-"G" pronunciation, and his speech led to 17,000 posts on Twitter and 50 news articles.Raster (or bitmap) images are generally what you think about when thinking of images. The disagreement over the pronunciation led to heated Internet debate. Steve Wilhite says that the intended pronunciation deliberately echoes the American peanut butter brand Jif, and CompuServe employees would often say "Choosy developers choose GIF", spoofing this brand's television commercials. The creators of the format pronounced the word as "jif" with a soft "G" /dʒɪf/ as in "gin". This is no longer a problem, because the patents have expired.Ī GIF may often represent a small clip of a favorite scene from a show or video. These issues led to the development of another format, called PNG. That patent was not held by CompuServe, but by Unisys. There were some problems with the patent of the LZW compression. No information is lost when compressing or uncompressing. Lempel-Ziv-Welch, or LZW, is a lossless compression. To reduce their size, images are compressed using Lempel–Ziv–Welch compression. GIF is not used to show photographs very much, because having only 256 colors is limiting for such a task. Each frame of an animation can have its own set of 256 colors. ![]() Today, it is widely used on the World Wide Web.The format supports up to 8 bits per pixel, or 256 colors. CompuServe developed and introduced the format in 1987. ![]() It is a raster graphics format that is the image has a fixed size. Graphics Interchange Format (often shortened to GIF) is a file format for images. Posterization is noticeable in the blue gradient areas due to the restricted palette.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |