A line-by-line bitmap representation of the current screen being seen on the computer. 
This is a resolution - dependant image that is produced using pixels. The quality of a low - resolution image decreases as you zoom in to the image. Photoshop is raster software
This is a resolution - dependant image that is produced using pixels. The quality of a low - resolution image decreases as you zoom in to the image. Photoshop is raster software. 
See Bit Image
An image in raster format.
An image composed of lines of pixels in a grid layout or bitmap.