Basics of Photoshop
Basics of Photoshop What is Image? A Visual presentation of something is called Image eg: pictures, photgraphs. Basics of Photoshop. Images are of two types : Raster Images Vector Images Raster Images: Raster Images is a way to represent digital images. Eg Scanning photo. Raster Images are also know as bitmap. When a raster image is created, the image on the screen is converted into pixels. Each pixel is assigned a specific value that determines its color. This format uses the red, green, blue (RGB) color system. An RGB value of 0,0,0 would be black, and the values go all the way through to 256 for each color, allowing the expression of a wide range of values. In photographs with subtle shading, this can be extremely valuable. Raster graphic are resolution-dependent and cannot be scaled up arbitrary without loss of apparent quality. Some Raster Images : Here fish is formed by blue color pixels. As the image is created using pixel (no digital camera is used), hence the im