PNG supports palettes of 24-bit RGB colors, RGB images or greyscale or RGB images. GIF as they also include an 8-bit transparency channel, which allows the colors in the image to fade from opaque to transparent GIF images only support fully opaque or fully transparent pixels. GIF file), but without those copyright limitations it cannot be animated like a GIF image. PNG uses indexed colors and lossless compression (like a. It was created originally to replace the GIF file format when it was announced that the companies who created the GIF format wanted royalties. PNG pronounced ping is a format for storing bitmapped (raster) images on computers. More detail on Photoshop and the PSD format.PSB which essentially stands for Photoshop Big, this allows images to support up to a maximum height and width of 300,000 pixels and a length limit of 4 Exabytes. Sometimes Photoshop files have the extension. PSD file extension, this PSD stores an image with support for a lot of imaging options such as Masks, transparency, clipping paths and duotone settings. You can't however re-convert a JPG/PNG file that has been converted from a PSD back to a PSD file - it loses it's layers. PSD is the propiertry format that Adobe uses to allow these files to be saved in, they can then be either opened in various versions of Adobe Photoshop or if a user wants to send them to others they can be flattened to PNG, JPG or other more standard image formats.
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A PSD file is known as a Photoshop document and was developed by Adobe in order for Graphic Designers to create layered images.