Invert by accord 

// create filter
Invert filter = new Invert( );
// apply the filter
filter.ApplyInPlace( image );

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batch file processing by C#

// For Directory.GetFiles and Directory.GetDirectories // For File.Exists, Directory.Exists using System; using System.IO; using System.Collections; public class RecursiveFileProcessor { public static void Main( string [] args) { foreach ( string path in args) { if (File.Exists(path)) { // This path is a file ProcessFile(path); } else if (Directory.Exists(path)) { // This path is a directory ProcessDirectory(path); } else { Console.WriteLine( "{0} is not a valid file or directory." , path); } } } // Process all files in the directory passed in, recurse on any directories // that are found, and process the files they contain. public static void ProcessDirectory( string targetDirector...
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Horizontal projection - AForge

// collect statistics HorizontalIntensityStatistics his = new HorizontalIntensityStatistics( sourceImage ); // get gray histogram (for grayscale image) Histogram histogram = his.Gray; // output some histogram's information System.Diagnostics.Debug.WriteLine( "Mean = " + histogram.Mean ); System.Diagnostics.Debug.WriteLine( "Min = " + histogram.Min ); System.Diagnostics.Debug.WriteLine( "Max = " + histogram.Max );
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