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Digital Imaging

Digital Imaging - Digital Imaging Digital Image Resolution...

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Digital Imaging Digital Imaging
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Image Resolution m Expressed as the number of horizontal and vertical pixels Higher resolutions contain more data (larger file size) and are higher quality
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Image Resolution m File size of bitmaps can be reduced by cropping i Bitmaps are resolution dependent i When you increase the resolution of a bitmap, pixel interpolation may occur Some images may appear pixelated
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Color Depth and Palettes m Color depth is the number of colors available for use in an image Monochrome bitmap i Increasing color depth increases file size True Color bitmap (24-bit bitmap) 32-bit bitmap i Color palettes are used to control color depth Grayscale palette System palette Web palette
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Image Compression m Any technique that recodes data in an image file so it contains fewer bits Lossless compression Lossy compression i File compression utility
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Bitmap Graphics m Composed of a grid of dots Color of each dot is stored as a binary number i Bitmaps do not have a fixed physical size
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Bitmap Graphic Formats
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