public static unsafe StdInput FromBitmap(Bitmap bm)
{
int r = 2, g = 1, b = 0;
float cr = 0.5f, cg = 0.419f, cb = 0.081f; // RMY convert method
StdInput lenetInput = new StdInput(bm.Height, bm.Width);
byte[] buffer = lenetInput.GetDataBuffer();
// lock source bitmap data
BitmapData srcData = bm.LockBits(
new Rectangle(0, 0, bm.Width, bm.Height),
ImageLockMode.ReadOnly, bm.PixelFormat);
int pixelSize = (srcData.PixelFormat == PixelFormat.Format8bppIndexed) ? 1 : 3;
byte *src = (byte *)srcData.Scan0.ToPointer();
int srcOffset = srcData.Stride - bm.Width * pixelSize;
int width = bm.Width;
int height = bm.Height;
int yres;
// --- GrayScale ---
if (srcData.PixelFormat == PixelFormat.Format8bppIndexed)
{
// for each line
for (int y = 0; y < height; y++)
{
// for each pixel
for (int x = 0; x < width; x++, src++)
{
yres = y;
buffer[yres * width + x] = Convert.ToByte(255 - *src);
}
src += srcOffset;
}
}
else //--- RGB ---
{
// for each line
for (int y = 0; y < height; y++)
{
// for each pixel
for (int x = 0; x < width; x++, src += pixelSize)
{
yres = y;
buffer[yres * width + x] = Convert.ToByte(255 - Convert.ToByte(cr * src[r] + cg * src[g] + cb * src[b]));
}
src += srcOffset;
}
}
// unlock source image
bm.UnlockBits(srcData);
return(lenetInput);
}
public static unsafe StdInput FromBitmap(Bitmap bm)
{
int r = 2, g = 1, b = 0;
float cr = 0.5f, cg = 0.419f, cb = 0.081f; // RMY convert method
StdInput lenetInput = new StdInput(bm.Height, bm.Width);
byte[] buffer = lenetInput.GetDataBuffer();
// lock source bitmap data
BitmapData srcData = bm.LockBits(
new Rectangle(0, 0, bm.Width, bm.Height),
ImageLockMode.ReadOnly, bm.PixelFormat);
int pixelSize = (srcData.PixelFormat == PixelFormat.Format8bppIndexed) ? 1 : 3;
byte* src = (byte*)srcData.Scan0.ToPointer();
int srcOffset = srcData.Stride - bm.Width * pixelSize;
int width = bm.Width;
int height = bm.Height;
int yres;
// --- GrayScale ---
if (srcData.PixelFormat == PixelFormat.Format8bppIndexed)
{
// for each line
for (int y = 0; y < height; y++)
{
// for each pixel
for (int x = 0; x < width; x++, src++)
{
yres = y;
buffer[yres * width + x] = Convert.ToByte(255 - *src);
}
src += srcOffset;
}
}
else //--- RGB ---
{
// for each line
for (int y = 0; y < height; y++)
{
// for each pixel
for (int x = 0; x < width; x++, src += pixelSize)
{
yres = y;
buffer[yres * width + x] = Convert.ToByte(255 - Convert.ToByte(cr * src[r] + cg * src[g] + cb * src[b]));
}
src += srcOffset;
}
}
// unlock source image
bm.UnlockBits(srcData);
return lenetInput;
}