CSE 167 Lecture Notes - Lecture 13: Color Filter Array, Raster Graphics, Raster Scan
19 Feb 2019
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Raster graphics: use a bitmap w/ discrete pixels. Raster scan crt (paints image line by line ) Crt, flat panel, television (rect array of pixels) Printers (scanning: no physical grid but print ink ) Store image as 2d array (of rgb [sub-pixel] values) In practice, there may be resolution mismatch , or resize . Vector image: description of shapes (line, circle, ) 32 bit of memory for rgba framebuffer 8+ mb. For printers, pixel density (300 dpi or ppi) Often binary or cmyk, require finer grid iphone retina display > 300 dpi. At 12 inches, pixels closer than retina"s ability to distinguish angles. Digital cameras in mega-pixels (often > 10 mp) In the early days, the cost of a frame buffer was significant, compared to now! Non-zero intensity for 0, black level even when off (there is some reflection in your eyes) Vanta black is the material closest to reaching true black (absorbs 99. 96%)
