Ich versuche, meine Bilderkennungsklasse mit Lockbits zu erhöhen, aber das verursacht Probleme mit dem Code und daher wird es nicht ausgeführt. Wie kann ich Lockbits und getpixel gleichzeitig verwenden, um die Bilderfassung zu beschleunigen, oder kann mir jemand eine Alternative zeigen, die genauso schnell ist?Bildverarbeitung mit Lockbits, Alternative zu getpixel?
Code:
static IntPtr Iptr = IntPtr.Zero;
static BitmapData bitmapData = null;
static public byte[] Pixels { get; set; }
static public int Depth { get; private set; }
static public int Width { get; private set; }
static public int Height { get; private set; }
static public void LockBits(Bitmap source)
{
// Get width and height of bitmap
Width = source.Width;
Height = source.Height;
// get total locked pixels count
int PixelCount = Width * Height;
// Create rectangle to lock
Rectangle rect = new Rectangle(0, 0, Width, Height);
// get source bitmap pixel format size
Depth = System.Drawing.Bitmap.GetPixelFormatSize(source.PixelFormat);
// Lock bitmap and return bitmap data
bitmapData = source.LockBits(rect, ImageLockMode.ReadWrite,
source.PixelFormat);
// create byte array to copy pixel values
int step = Depth/8;
Pixels = new byte[PixelCount * step];
Iptr = bitmapData.Scan0;
// Copy data from pointer to array
Marshal.Copy(Iptr, Pixels, 0, Pixels.Length);
}
static public bool SimilarColors(int R1, int G1, int B1, int R2, int G2, int B2, int Tolerance)
{
bool returnValue = true;
if (Math.Abs(R1 - R2) > Tolerance || Math.Abs(G1 - G2) > Tolerance || Math.Abs(B1 - B2) > Tolerance)
{
returnValue = false;
}
return returnValue;
}
public bool findImage(Bitmap small, Bitmap large, out Point location)
{
unsafe
{
LockBits(small);
LockBits(large);
//Loop through large images width
for (int largeX = 0; largeX < large.Width; largeX++)
{
//And height
for (int largeY = 0; largeY < large.Height; largeY++)
{
//Loop through the small width
for (int smallX = 0; smallX < small.Width; smallX++)
{
//And height
for (int smallY = 0; smallY < small.Height; smallY++)
{
//Get current pixels for both image
Color currentSmall = small.GetPixel(smallX, smallY);
Color currentLarge = large.GetPixel(largeX + smallX, largeY + smallY);
//If they dont match (i.e. the image is not there)
if (!colorsMatch(currentSmall, currentLarge))
//Goto the next pixel in the large image
goto nextLoop;
}
}
//If all the pixels match up, then return true and change Point location to the top left co-ordinates where it was found
location = new Point(largeX, largeY);
return true;
//Go to next pixel on large image
nextLoop:
continue;
}
}
//Return false if image is not found, and set an empty point
location = Point.Empty;
return false;
}
}
Ihre LockBits-Methode ist nutzlos ... es kopiert die Pixel in ein Byte-Array, aber Sie verwenden nie das Array –
Der Sinn der Verwendung von LockBits ist ** mit GetPixel ** zu stoppen. –