Optimised a little bit

OCR_Decode/DriverDrsWindow.cs

@@ -6,6 +6,7 @@ using System.Text;
 using System.Threading.Tasks;
 using Tesseract;
 using System.Windows.Forms;
+using System.Drawing.Imaging;
 
 namespace OCR_Decode
 {
@@ -19,41 +20,6 @@ namespace OCR_Decode
         }
         public override object DecodePng()
         {
-            /*
-            Pix tessImage = Pix.LoadFromMemory(ImageToByte(WindowImage));
-
-            Page page = Engine.Process(tessImage);
-            // Get the iterator for the page layout
-            using (var iter = page.GetIterator())
-            {
-                // Loop over the elements of the page layout
-                iter.Begin();
-                do
-                {
-                    // Declare a Rect variable to hold the bounding box
-                    Rect boundingBox;
-
-                    // Get the bounding box for the current element
-                    if (iter.TryGetBoundingBox(PageIteratorLevel.Word, out boundingBox))
-                    {
-                        //g.DrawRectangle(Pens.Red, new Rectangle(boundingBox.X1, boundingBox.Y1, boundingBox.Width, boundingBox.Height));
-                    }
-
-                    // Get the text for the current element
-                    var text = iter.GetText(PageIteratorLevel.Word);
-                    //MessageBox.Show(text.ToUpper() + Environment.NewLine);
-                } while (iter.Next(PageIteratorLevel.Word));
-            }
-
-            WindowImage.Save(Reader.DEBUG_DUMP_FOLDER + "testDRS"+ ".png");
-            page.Dispose();
-            */
-            /*
-            string result = GetStringFromPng();
-            //if (result == "")
-                //result = "DRS_OPENED";
-            WindowImage.Save(Reader.DEBUG_DUMP_FOLDER + result+ rnd.Next(0,10000) +".png");
-            */
             bool result = false;
             int greenValue = GetGreenPixels();
             if (EmptyDrsGreenValue == -1)
@@ -66,20 +32,38 @@ namespace OCR_Decode
 
             return result;
         }
-        private int GetGreenPixels()
+        private unsafe int GetGreenPixels()
         {
             int tot = 0;
-            for (int y = 0; y < WindowImage.Height; y++)
+
+            Bitmap bmp = WindowImage;
+            Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
+            BitmapData bmpData = bmp.LockBits(rect, ImageLockMode.ReadOnly, bmp.PixelFormat);
+            int bytesPerPixel = Bitmap.GetPixelFormatSize(bmp.PixelFormat) / 8;
+
+            unsafe
             {
-                for (int x = 0; x < WindowImage.Width; x++)
+                byte* ptr = (byte*)bmpData.Scan0.ToPointer();
+                for (int y = 0; y < bmp.Height; y++)
                 {
-                    Color pxlColor = WindowImage.GetPixel(x, y);
+                    byte* currentLine = ptr + (y * bmpData.Stride);
-                    if (pxlColor.G > pxlColor.B * 1.5 && pxlColor.G > pxlColor.R * 1.5)
+                    for (int x = 0; x < bmp.Width; x++)
                     {
-                        tot++;
+                        byte* pixel = currentLine + (x * bytesPerPixel);
+
+                        byte blue = pixel[0];
+                        byte green = pixel[1];
+                        byte red = pixel[2];
+
+                        if (green > blue * 1.5 && green > red * 1.5)
+                        {
+                            tot++;
+                        }
                     }
                 }
             }
+            bmp.UnlockBits(bmpData);
+
             return tot;
         }
         public Rectangle GetBox()

OCR_Decode/OCR_Decode.csproj

@@ -24,6 +24,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>

OCR_Decode/OcrImage.cs

@@ -6,6 +6,7 @@ using System.Threading.Tasks;
 using System.Drawing;
 using System.Drawing.Drawing2D;
 using Accord.Imaging.Filters;
+using System.Drawing.Imaging;
 
 namespace OCR_Decode
 {
@@ -42,7 +43,6 @@ namespace OCR_Decode
                     result = Grayscale(result);
                     result = InvertColors(result);
                     result = Tresholding(result, 165);
-                    //result = Erode(result,1);
                     result = Resize(result);
                     result = Dilatation(result, 1);
                     break;
@@ -53,60 +53,99 @@ namespace OCR_Decode
                     result = Erode(result, 1);
                     break;
             }
-            
+
             //result = Dilatation(result, 1);
             return result;
         }
         public static Bitmap Grayscale(Bitmap input)
         {
-            Bitmap output = new Bitmap(input.Width, input.Height);
+            Bitmap bmp = input;
+            Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
+            BitmapData bmpData = bmp.LockBits(rect, ImageLockMode.ReadWrite, bmp.PixelFormat);
+            int bytesPerPixel = Bitmap.GetPixelFormatSize(bmp.PixelFormat) / 8;
 
-            for (int y = 0; y < input.Height; y++)
+            unsafe
             {
-                for (int x = 0; x < input.Width; x++)
+                byte* ptr = (byte*)bmpData.Scan0.ToPointer();
+                for (int y = 0; y < bmp.Height; y++)
                 {
-                    Color pixel = input.GetPixel(x, y);
+                    byte* currentLine = ptr + (y * bmpData.Stride);
-                    int gray = (int)(pixel.R * 0.3 + pixel.G * 0.59 + pixel.B * 0.11);
+                    for (int x = 0; x < bmp.Width; x++)
-                    output.SetPixel(x, y, Color.FromArgb(gray, gray, gray));
+                    {
+                        byte* pixel = currentLine + (x * bytesPerPixel);
+
+                        byte blue = pixel[0];
+                        byte green = pixel[1];
+                        byte red = pixel[2];
+
+                        int gray = (int)(red * 0.3 + green * 0.59 + blue * 0.11);
+
+                        pixel[0] = pixel[1] = pixel[2] = (byte)gray;
+                    }
                 }
             }
+            bmp.UnlockBits(bmpData);
 
-            return output;
+            return bmp;
         }
         public static Bitmap Tresholding(Bitmap input, int threshold)
         {
-            Bitmap output = new Bitmap(input.Width, input.Height);
+            Bitmap bmp = input;
+            Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
+            BitmapData bmpData = bmp.LockBits(rect, ImageLockMode.ReadWrite, bmp.PixelFormat);
+            int bytesPerPixel = Bitmap.GetPixelFormatSize(bmp.PixelFormat) / 8;
 
-            for (int y = 0; y < input.Height; y++)
+            unsafe
             {
-                for (int x = 0; x < input.Width; x++)
+                byte* ptr = (byte*)bmpData.Scan0.ToPointer();
+                for (int y = 0; y < bmp.Height; y++)
                 {
-                    Color pixel = input.GetPixel(x, y);
+                    byte* currentLine = ptr + (y * bmpData.Stride);
-                    int gray = (int)(pixel.R * 0.3 + pixel.G * 0.59 + pixel.B * 0.11);
+                    for (int x = 0; x < bmp.Width; x++)
-                    int value = gray < threshold ? 0 : 255;
+                    {
-                    output.SetPixel(x, y, Color.FromArgb(value, value, value));
+                        byte* pixel = currentLine + (x * bytesPerPixel);
+
+                        byte blue = pixel[0];
+                        byte green = pixel[1];
+                        byte red = pixel[2];
+
+                        int gray = (int)(red * 0.3 + green * 0.59 + blue * 0.11);
+                        int value = gray < threshold ? 0 : 255;
+
+                        pixel[0] = pixel[1] = pixel[2] = (byte)value;
+                    }
                 }
             }
+            bmp.UnlockBits(bmpData);
 
-            return output;
+            return bmp;
         }
         public static Bitmap InvertColors(Bitmap input)
         {
-            Bitmap output = new Bitmap(input.Width, input.Height);
+            Bitmap bmp = input;
+            Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
+            BitmapData bmpData = bmp.LockBits(rect, ImageLockMode.ReadWrite, bmp.PixelFormat);
+            int bytesPerPixel = Bitmap.GetPixelFormatSize(bmp.PixelFormat) / 8;
 
-            for (int y = 0; y < input.Height; y++)
+            unsafe
             {
-                for (int x = 0; x < input.Width; x++)
+                byte* ptr = (byte*)bmpData.Scan0.ToPointer();
+                for (int y = 0; y < bmp.Height; y++)
                 {
-                    Color pixel = input.GetPixel(x, y);
+                    byte* currentLine = ptr + (y * bmpData.Stride);
-                    int red = 255 - pixel.R;
+                    for (int x = 0; x < bmp.Width; x++)
-                    int green = 255 - pixel.G;
+                    {
-                    int blue = 255 - pixel.B;
+                        byte* pixel = currentLine + (x * bytesPerPixel);
-                    output.SetPixel(x, y, Color.FromArgb(red, green, blue));
+
+                        pixel[0] = (byte)(255 - pixel[0]);
+                        pixel[1] = (byte)(255 - pixel[1]);
+                        pixel[2] = (byte)(255 - pixel[2]);
+                    }
                 }
             }
+            bmp.UnlockBits(bmpData);
 
-            return output;
+            return bmp;
         }
         public static Bitmap ApplyGaussianBlur(Bitmap input, int radius)
         {