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PODigital camera algorithms
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copied!<p>I'm working on a simple video device and I'd like to introduce some standard cool camera features. Amongst all I'd like to introduce</p> <ul> <li>Focus indicator</li> <li>Auto focus</li> <li>Auto exposure (ideal exposure time estimation)</li> </ul> <p>Right now I'm looking for some examples, how these features can be implemented. Do you have any useful links?</p> <p>EDIT : Ok, I will use standard CCD camera, which can provide me ~ 20fps in ~1MPix resolution. I'm planning to write it in C#, in case of performance issues, I'll use C++. I'll have lens + CCD camera + motor. </p> <p>EDIT : I'd like to see some more detailed algorithm description. I'm sure some have to be taught in university courses, but I have troubles finding some. For focus indicator I've tried a primitive approach, but in some cases it failed.</p> <pre><code> int verticalPoints = 0, horizontalPoints = 0; ///Calculate the vertical differences for (int x = 0; x < toAnalyze.Width; x++) { for (int y = 1; y < toAnalyze.Height; y++) { byte* pixel = (byte*)data.Scan0 + y * stride + x; verticalDiff += Math.Abs(*pixel - *(pixel - stride));; } } verticalDiff /= toAnalyze.Width * (toAnalyze.Height-1); ///Calculate horizontal differences for (int y = 0; y < toAnalyze.Height; y++) { for (int x = 1; x < toAnalyze.Width; x++) { byte* pixel = (byte*)data.Scan0 + y * stride + x; horizontalDiff += Math.Abs(*pixel - *(pixel - 1)); } } horizontalDiff /= (toAnalyze.Width-1) * toAnalyze.Height; ///And return the average value return(verticalDiff + horizontalDiff) / 2; </code></pre> <p>Thanks</p>

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