Image warp effect filter.
The image processing filter implements a warping filter, which sets pixels in destination image to values from source image taken with specified offset (see WarpMap).
The filter accepts 8 bpp grayscale images and 24/32 color images for processing.
Sample usage:
// build warp map int width = image.Width; int height = image.Height; IntPoint[,] warpMap = new IntPoint[height, width]; int size = 8; int maxOffset = -size + 1; for ( int y = 0; y < height; y++ ) { for ( int x = 0; x < width; x++ ) { int dx = ( x / size ) * size - x; int dy = ( y / size ) * size - y; if ( dx + dy <= maxOffset ) { dx = ( x / size + 1 ) * size - 1 - x; } warpMap[y, x] = new IntPoint( dx, dy ); } } // create filter ImageWarp filter = new ImageWarp( warpMap ); // apply the filter Bitmap newImage = filter.Apply( image ); Initial image:
Result image:
private Bitmap AddWarpEffect(ref Bitmap image)
{
// build warp map
int width = image.Width;
int height = image.Height;
IntPoint[,] warpMap = new IntPoint[height, width];
int size = 8;
int maxOffset = -size + 1;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
int dx = (x / size) * size - x;
int dy = (y / size) * size - y;
if (dx + dy <= maxOffset)
{
dx = (x / size + 1) * size - 1 - x;
}
warpMap[y, x] = new IntPoint(dx, dy);
}
}
// create filter
ImageWarp filter = new ImageWarp(warpMap);
// apply the filter
Bitmap newImage = filter.Apply(image);
return newImage;
}
// "Rombozoid" effect based on Image Warp
private void rombozoidMenuItem_Click( object sender, EventArgs e )
{
// build warp map
int width = image.Width;
int height = image.Height;
IntPoint[,] warpMap = new IntPoint[height, width];
int size = 8;
int maxOffset = -size + 1;
for ( int y = 0; y < height; y++ )
{
for ( int x = 0; x < width; x++ )
{
int dx = ( x / size ) * size - x;
int dy = ( y / size ) * size - y;
if ( dx + dy <= maxOffset )
{
int neighborX = ( x / size + 1 ) * size - 1;
if ( neighborX < width )
{
dx = neighborX - x;
}
}
warpMap[y, x] = new IntPoint( dx, dy );
}
}
// create filter
ImageWarp filter = new ImageWarp( warpMap );
// apply the filter
ApplyFilter( filter );
}
