Digital imaging. Two types of graphic Bitmap Vector.

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Presentation transcript:

Digital imaging

Two types of graphic Bitmap Vector

Digital imaging Bitmap Image is made up of millions of tiny blocks called pixels, and each pixel is given a single colour Files to store bitmap images are large. Large file size means large upload time and download time. For this reason, they should not be used on web-pages Harder to edit than a vector. Image loses sharpness when re- sized.

Digital imaging Vector Information about how to draw the image is stored rather than the image itself. Stored as a series of equations. The equations tell the computer how to draw the parts of the image. Only instructions/equations are stored, so file size is small. Quick upload and download time. Can store lots more images in the same storage space compared to bitmaps. Easier to edit as you can edit parts of the image. Can re-size image without loss in quality. Only suitable for images with a limited number of colours. No good for images with continuously changing colours like a photograph.