動的な二値化

 写真で文書をとると、照明の関係でどうしても、背景の明暗が影響して二値化がうまくいかない。これをうまく処理するために、opencvsharpライブラリを利用しC#で作ってみた。Nugetで、ライブラリを入手して作成。だいぶみやすくなる。

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using OpenCvSharp; namespace _2chika { class Program { static void Main(string[] args) { string[] Commands = System.Environment.GetCommandLineArgs(); Mat src = new Mat(@Commands[1]); Cv2.CvtColor(src, src, ColorConversionCodes.RGB2GRAY); Mat binary = new Mat(), binearyInv = new Mat(), otsu = new Mat(), adaptiveMean = new Mat(), adaptiveGaussian = new Mat(); double maxVal = 255; int blocksize = 13, c = 6; //Cv2.AdaptiveThreshold(src, adaptiveMean, maxVal, AdaptiveThresholdTypes.MeanC, ThresholdTypes.Binary, blocksize, c); Cv2.AdaptiveThreshold(src, adaptiveGaussian, maxVal, AdaptiveThresholdTypes.GaussianC, ThresholdTypes.Binary, blocksize, c); Cv2.ImWrite(Commands[1] + "out.jpg",adaptiveGaussian); // Cv2.ImWrite(Commands[1] + "out.jpg",adaptiveMean); Cv2.WaitKey(); } } }