public static bool IsFullPage(Bitmap page, IEnumerable<IPolygon> polygons)
{
Grayscale gs = new Grayscale(0.30, 0.59, 0.11);
Bitmap result = gs.Apply(page.To32bpp());
long color = aggregateImageIntensity(result);
return isWhite(color, page.Width * page.Height, 0.95) ||
isBlack(color, page.Width * page.Height, 0.6) ||
cellsCover(polygons) < 0.4 * page.Width * page.Height;
}
public static Bitmap Threshold(Bitmap page, int threshold)
{
page = page.To32bpp();
Grayscale gs = new Grayscale(0.30, 0.59, 0.11);
Threshold ts = new Threshold(threshold);
Bitmap result = gs.Apply(page);
return ts.Apply(result);
}
private void CheckColors(HashSet<Color> testColors, Bitmap b)
{
bool result;
b = b.To32bpp();
BitmapData data = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
result = CheckColors(testColors, data);
b.UnlockBits(data);
Assert.IsTrue(result, "Required point missing");
}
