示例#1
0
        /// <summary>
        /// Converts an 4-bit grayscale array to a bitmap.
        /// </summary>
        /// <param name="width">Width of the image</param>
        /// <param name="height">Height of the image</param>
        /// <param name="frame">4-bit grayscale array</param>
        /// <param name="hue">Hue in which the bitmap will be created</param>
        /// <param name="saturation">Saturation in which the bitmap will be created</param>
        /// <param name="luminosity">Maximal luminosity in which the bitmap will be created</param>
        /// <returns>Bitmap</returns>
        private static BitmapSource ConvertFromGray4(int width, int height, Frame frame, double hue, double saturation, double luminosity)
        {
            var bmp         = new WriteableBitmap(width, height, 96, 96, PixelFormats.Bgr32, null);
            var bufferSize  = (Math.Abs(bmp.BackBufferStride) * height + 2);
            var frameBuffer = new byte[bufferSize];

            var index = 0;

            bmp.Lock();
            for (var y = 0; y < height; y++)
            {
                for (var x = 0; x < width; x++)
                {
                    var  pixelLum = frame.Get(y * width + x);
                    var  lum = luminosity * pixelLum / 15;
                    byte red, green, blue;
                    ColorUtil.HslToRgb(hue, saturation, lum, out red, out green, out blue);

                    frameBuffer[index]     = blue;
                    frameBuffer[index + 1] = green;
                    frameBuffer[index + 2] = red;
                    index += 4;
                }
            }
            bmp.WritePixels(new Int32Rect(0, 0, width, height), frameBuffer, bmp.BackBufferStride, 0);
            bmp.Unlock();
            bmp.Freeze();
            return(bmp);
        }
示例#2
0
        /// <summary>
        /// Converts a bitmap to an RGB24 array.
        /// </summary>
        /// <param name="bmp">Source bitmap</param>
        /// <param name="buffer">Destination buffer. Will be filled with RGB values for each pixel between 0 and 255.</param>
        /// <param name="offset">Offset in destination array</param>
        /// <param name="lum">Multiply luminosity</param>
        public static void ConvertToRgb24(BitmapSource bmp, byte[] buffer, int offset = 0, double lum = 1)
        {
            var bytesPerPixel = (bmp.Format.BitsPerPixel + 7) / 8;
            var bytes         = new byte[bytesPerPixel];
            var rect          = new Int32Rect(0, 0, 1, 1);
            var pos           = offset;

            for (var y = 0; y < bmp.PixelHeight; y++)
            {
                for (var x = 0; x < bmp.PixelWidth; x++)
                {
                    rect.X = x;
                    rect.Y = y;
                    bmp.CopyPixels(rect, bytes, bytesPerPixel, 0);

                    if (Math.Abs(lum - 1) > 0.01)
                    {
                        double hue, saturation, luminosity;
                        byte   r, g, b;
                        ColorUtil.RgbToHsl(bytes[2], bytes[1], bytes[0], out hue, out saturation, out luminosity);
                        ColorUtil.HslToRgb(hue, saturation, luminosity * lum, out r, out g, out b);
                        buffer[pos]     = r;
                        buffer[pos + 1] = g;
                        buffer[pos + 2] = b;
                    }
                    else
                    {
                        buffer[pos]     = bytes[2];                          // r
                        buffer[pos + 1] = bytes[1];                          // g
                        buffer[pos + 2] = bytes[0];                          // b
                    }
                    pos += 3;
                }
            }
        }
示例#3
0
        /// <summary>
        /// Converts an 2-bit grayscale array to a bitmap.
        /// </summary>
        /// <param name="width">Width of the image</param>
        /// <param name="height">Height of the image</param>
        /// <param name="frame">2-bit grayscale array</param>
        /// <param name="hue">Hue in which the bitmap will be created</param>
        /// <param name="saturation">Saturation in which the bitmap will be created</param>
        /// <param name="luminosity">Maximal luminosity in which the bitmap will be created</param>
        /// <returns>Bitmap</returns>
        private static BitmapSource ConvertFromGray2(int width, int height, Frame frame, double hue, double saturation, double luminosity)
        {
            if (frame.Size > 0 && frame.Size != width * height)
            {
                throw new ArgumentException($"Must convert to {width}x{height} but frame buffer is {frame.Size} bytes");
            }

            var bmp         = new WriteableBitmap(width, height, 96, 96, PixelFormats.Bgr32, null);
            var bufferSize  = (Math.Abs(bmp.BackBufferStride) * height + 2);
            var frameBuffer = new byte[bufferSize];

            var index = 0;

            bmp.Lock();
            for (var y = 0; y < height; y++)
            {
                for (var x = 0; x < width; x++)
                {
                    try {
                        var  pixelLum = frame.Get(y * width + x);                        // 0 - 3
                        var  lum = luminosity * pixelLum / 3;
                        byte red, green, blue;
                        ColorUtil.HslToRgb(hue, saturation, lum, out red, out green, out blue);

                        frameBuffer[index]     = blue;
                        frameBuffer[index + 1] = green;
                        frameBuffer[index + 2] = red;
                        index += 4;
                    } catch (IndexOutOfRangeException e) {
                        Logger.Error(e, $"Converting {width}x{height} with {frame.Size} bytes: Trying to get pixel at position {y * width + x}");
                        throw;
                    }
                }
            }
            bmp.WritePixels(new Int32Rect(0, 0, width, height), frameBuffer, bmp.BackBufferStride, 0);
            bmp.Unlock();
            bmp.Freeze();
            return(bmp);
        }
示例#4
0
        /// <summary>
        /// Converts a bitmap to an RGB24 array.
        /// </summary>
        /// <param name="bmp">Source bitmap</param>
        /// <param name="buffer">Destination buffer. Will be filled with RGB values for each pixel between 0 and 255.</param>
        /// <param name="offset">Offset in destination array</param>
        /// <param name="lum">Multiply luminosity</param>
        public static void ConvertToRgb24(BitmapSource bmp, byte[] buffer, int offset = 0, double lum = 1)
        {
            var stride = bmp.PixelWidth * (bmp.Format.BitsPerPixel / 8);

            var bytes = new byte[bmp.PixelHeight * stride];

            bmp.CopyPixels(bytes, stride, 0);

            if (Math.Abs(lum - 1) > 0.01)
            {
                for (var i = 0; i < bytes.Length; i += 3)
                {
                    double hue, saturation, luminosity;
                    byte   r, g, b;
                    ColorUtil.RgbToHsl(bytes[i + 2], bytes[i + 1], bytes[i], out hue, out saturation, out luminosity);
                    ColorUtil.HslToRgb(hue, saturation, luminosity * lum, out r, out g, out b);
                    buffer[i]     = r;
                    buffer[i + 1] = g;
                    buffer[i + 2] = b;
                }
            }
            else
            {
                unsafe
                {
                    fixed(byte *pBuffer = buffer, pBytes = bytes)
                    {
                        byte *pB = pBuffer, pEnd = pBytes + bytes.Length;

                        for (var pByte = pBytes; pByte < pEnd; pByte += 4, pB += 3)
                        {
                            *(pB)     = *(pByte + 2);
                            *(pB + 1) = *(pByte + 1);
                            *(pB + 2) = *(pByte);
                        }
                    }
                }
            }
        }