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20 Cards in this Set
- Front
- Back
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Digitizing pixels
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using ninary numbers to represent brightness intensity of pixel components
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pixel
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generated image from dots of colors
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Color image
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controls the intensity for the three colors RGB
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Black and white images
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pixel intensity on or off
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true image
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controlling pixl intensity i.e adjusting pixel brightness
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Monochrome imaging
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one color with one bit per pixel
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Storage requirements for images depend on what three parameters
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1. Size of image i.e pixels horizontal x vertical
2. display quality of pixel |
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Formula for computing image storage/memory requirements
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1. [Vertical x horizontal (pixels)x bits per pixel]divided by 8 bits per byte = # of Bytes
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Shortcut formula for storage requirements
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# of pixels x Bytes per pixel =
# of Bytes required |
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TIFF
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Tagged Image File Format...extension .tif...it uses 1 byte per color so three bytes in all per pixel
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JPEG
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Joint Photographic Experts group with a compression ratio of 15-20
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Codec
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algorithm used to compress and decompress a file
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Two type of line sequences that determine HDTV formats
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1. Progressive (p)
2. Interlaced or scanned (i) |
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Progressive Scan
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Sends all lines in sequence
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Interlaced scan
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Sends odd numbered in sequence and then sends even numbered lines
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Two determining factors for HDTV format
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1. Lines (more lines are better)
2. Progressive vs interlaced scans. (progressive is better) |
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Example of HDTV format
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1080p (This is ultimate standard that requires 1920 x 1080 poxels
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Factors effecting visual quality of HD
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1. Contrast ratio (white to black and higher is better)
2. Brighness (candelas per square meter. higher is better) 3. Response time (shorter is better) |
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HD ready TV
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TV can recieve and display regular (NTSC) broadcast but to display HD a HD source (HD tuner) is needed for HD signal
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Integrated HDTV
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Has an integrated HD tuner with the monitor and can also recieve regular TV broadcasts due to the NTSC tuner.
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