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POMore efficient way of scanning the screen for a specific color?
 

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  1. POMore efficient way of scanning the screen for a specific color?
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    <p>I currently have the following code which will take a screenshot and check each pixel one at a time if it matches the color I have specified. If it matches then it will move the mouse to the specific pixel location.</p> <p>I am currently looking for a better and faster way of doing this if anybody is able to help out.</p> <p>If you don't want to read the entire code I will explain the process right here: Basically the program will take a screenshot, and analyze it 1 pixel at a time comparing it to the desired color. It will start in the top left pixel and horizontally moving down one row at a time and if it was unable to find the pixel it will restart. This code also will only work for a 1080p screen which is fine for me.</p> <p>Now the code WORKS I am just looking for a more efficient way than scanning 2 Million + pixels.</p> <pre><code>Bitmap bitmap = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height); Graphics graphics = Graphics.FromImage(bitmap as Image); graphics.CopyFromScreen(0, 0, 0, 0, bitmap.Size); bool found = false; bool one = true; bool two = false; int x = 0; int y = 0; Bitmap myBitmap = bitmap; while (found != true) { Color pixelColor = myBitmap.GetPixel(x, y); if (pixelColor == Color.FromArgb(0, 0, 0)) { Cursor.Position = new Point(x, y); found = true; } if (one == true) { x = x + 1; if (x &gt;= 1920) { one = false; two = true; x = 0; } } else if (two == true) { y = y + 1; if (y &gt;= 1080) { y = 0; } one = true; two = false; } } </code></pre>
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    1. USElliot Ames
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      1. POMore efficient way of scanning the screen for a specific color?
      1. USNicholas Post
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    1. COYou want to search for a colour within an unordered collection of pixels without checking every pixel until you find the colour. There are other methods such as dropping the pixels into a set first, or sorting the collection, however these will each add a significant overhead as they much process every pixel before you even check. TLDR, Linear search is the only practical search method for unordered data. Other search algos such as binary search require ordered data.
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      1. POMore efficient way of scanning the screen for a specific color?
      1. USRobadob
    2. COThis seems a good task for a GPU
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      1. POMore efficient way of scanning the screen for a specific color?
      1. USFabio Marcolini
 

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