week13_fs

# week13_fs - 1 3 Points[Interactivity Gamut runs from almost...

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1. 3 Points [Interactivity] Gamut runs from almost no interactivity, as in a slide show, to full-blown immersive virtual reality. In a slide show, one can control the pace, usually with no jumps. Jumps are next level. Then control of media– start, stop, search, scroll, zoom. Then control of variables, as in DB query. Then control objects on the screen. Finally, control entire simulation. 2. 4 Points [Colour] int hist[256][256][256]; //image is an appropriate struct with int fields red,green,blue for i=0. .(MAX_Y-1) for j=0. .(MAX_X-1) { R = image[i][j].red; G = image[i][j].green; B = image[i][j].blue; hist[R][G][B]++; } 3. 3 Points [Colour] Answer: Find XYZ via X = i E ( λ x ( λ ) and similarly for Y and Z . Convert to RGB using, say, the NTSC 3 × 3 matrix — this assumes linear signals, which we do have so far. For a Planckian radiator at 6000 K, e.g., we get R=255,G=255,B=221, once we normal- ize to max==255. Then we still have to do a gamma-correction: e.g., we raise the RGB/255 values to the power 0.5, say, and get

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week13_fs - 1 3 Points[Interactivity Gamut runs from almost...

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