The differences in appearance between key frames are automatically calculated by the computer in a process known as tweening or morphing. of the figure are moved by the animator on key frames. Then the limbs, eyes, mouth, clothes, etc. This technique is identical to how the illusion of movement is achieved with television and motion pictures.įor 3D animations, objects (models) are built on the computer monitor (modeled) and 3D figures are rigged with a virtual skeleton. To create the illusion of movement, an image is displayed on the computer monitor and repeatedly replaced by a new image that is similar to it but advanced slightly in time (usually at a rate of 24, 25, or 30 frames/second). Computer-generated animations can also allow a single graphic artist to produce such content without the use of actors, expensive set pieces, or props. The target of the animation is sometimes the computer itself, while other times it is film.Ĭomputer animation is essentially a digital successor to stop motion techniques, but using 3D models, and traditional animation techniques using frame-by-frame animation of 2D illustrations. Modern computer animation usually uses 3D computer graphics to generate a three-dimensional picture. The more general term computer-generated imagery (CGI) encompasses both static scenes ( still images) and dynamic images ( moving images), while computer animation only refers to moving images. Set Lossy to 5 for fun.An example of computer animation which is produced from the " motion capture" techniqueĬomputer animation is the process used for digitally generating animations. However, you have to make careful decisions about which settings to skimp on.įor this GIF, I will stick with Selective and Diffusion, set the Dither to 100%, and leave Transparency and Interlaced unchecked. If you’ll be placing it on a website, you want to keep the file size as low as possible so it doesn’t bog down the site. This quick overview should help you decide on the settings you want for your GIF. Most of the time you’ll want to leave this at 256. Colorsįewer colors mean a smaller file size but it also means a reduction in quality. However, it comes with a stiff drawback as turning Lossy up close to 100 will virtually destroy the image’s quality.Ībout 5-10 is usually good, though some GIFs may allow you to go up to 50 without too much visible loss. LossyĪ higher number in the Lossy box will reduce the file size by up to 40% and sometimes more by discarding data. This can make download time feel shorter, but it also increases the file size so there’s some give and take. InterlacedĬheck the box so that a low-resolution version of the GIF appears in the browser while waiting for the full image to download. Click the Matte color swatch and use the color picker to choose your color. What if you want to put a color behind the GIF and fill the transparent spots? Un-check the transparency box and choose a matte color to go behind it. Transparency and MatteĬheck the transparency box to make fully transparent pixels transparent. You can change it to Pattern for a halftone-like square pattern or Noise. The random pattern is less noticeable in most GIFs. Diffusionĭiffusion is the default option under the dithering method. Restrictive provides the best visual optimization for web use but can make the file size bigger, which isn’t always ideal. It works when most of the colors in the image are concentrated around a single area of the color spectrum. Perceptual builds a custom color table that emphasizes color that the human eye prioritizes.Īdaptive changes with the image. Selective favors broad swaths of color and preserves web colors and is the best option most of the time. Selective is the default option but you can also choose Perceptual, Adaptive, Restrictive, or Custom.
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