public static int LoadImageHashes(string rootdir, HashCache cache, uint bits = 32 *32)
{
LoadImageExtensions();
string[] files = Directory.GetFiles(rootdir, "*", SearchOption.AllDirectories);
int iters = 0;
foreach (string file in files)
{
var fi = new FileInfo(file);
if (!ImageExtensions.Contains(fi.Extension))
{
continue;
}
string stoname = Utils.GetRelativePath(fi.FullName, Path.GetFullPath(rootdir)).UrlDecode();
if (cache.HasFile(stoname))
{
continue;
}
//CompareUtils.GetHashBitmap(new Bitmap(file), 32 * 32).Save(Path.Combine(odir, fi.Name + ".png"));
long[] hsh = GetHash(new Bitmap(file), bits);
cache.Cache(stoname, bits, hsh);
iters++;
}
return(iters);
}
public static List <Pair <string> > CompareImages(HashCache cache, uint diffq = 10, bool debug = false)
{
List <Pair <string> > outp = new List <Pair <string> >();
var files = cache.Filenames;
for (int i = 0; i < files.Length; i++)
{
for (int j = i + 1; j < files.Length; j++)
{
string key = files[i];
string kez = files[j];
cache.TryGetHash(key, out long[] hsha);
cache.TryGetHashBits(key, out uint bita);
cache.TryGetHash(kez, out long[] hshb);
cache.TryGetHashBits(key, out uint bitb);
if (bita != bitb)
{
if (debug)
{
Console.WriteLine("Bits in hash inequal for {0} and {1}.".SFormat(key, kez));
}
continue;
}
long[] xord = new long[hsha.Length];
for (int k = 0; k < hsha.Length; k++)
{
xord[k] = hsha[k] ^ hshb[k];
}
uint diffs = 0;
for (int k = 0; k < xord.Length; k++)
{
diffs += xord[k].SetBits();
}
if (debug)
{
Console.WriteLine("Diffs in {0} and {1}: {2}".SFormat(key, kez, diffs));
}
if (diffs <= diffq)
{
outp.Add(new Pair <string>(key, kez));
}
}
}
return(outp);
}
private static int LoadCachedFiles(string cachefile = "cache.hash")
{
Cache = new HashCache(new FileInfo(cachefile));
int iters = CompareUtils.LoadImageHashes(RelDir, Cache);
foreach (string file in Cache.Filenames)
{
var fulf = Path.GetFullPath(Path.Combine(RelDir, file));
if (!new FileInfo(fulf).Exists)
{
Cache.RemoveFile(file);
}
}
Cache.WriteCache();
return(iters);
}