private List <ImageHash> FindDuplicatesTo(ImageHash hash, int minSimilarity, ref List <ImageHash> alreadyMarkedAsDupl)
{
var currHashDupl = new List <ImageHash>();
foreach (var hashCompareWith in _hashLibToCompare)
{
if (hash.CompareWith(hashCompareWith) >= minSimilarity)
{
if (!alreadyMarkedAsDupl.Contains(hash))
{
alreadyMarkedAsDupl.Add(hash);
currHashDupl.Add(hash);
}
//if (!alreadyMarkedAsDupl.Contains(hashCompareWith))
//{
// alreadyMarkedAsDupl.Add(hashCompareWith);
// currHashDupl.Add(hashCompareWith);
//}
}
}
return(currHashDupl);
}
public void AddPicByPathToCompare(string path)
{
var hash = new ImageHash(_hashSize);
hash.GenerateFromPath(path);
_hashLibToCompare.Add(hash);
hash = new ImageHash(_hashSize);
hash.GenerateFromPathReversed(path);
_hashLibToCompare.Add(hash);
}
/// <summary>
/// Method to compare 2 image hashes
/// </summary>
/// <returns>% of similarity</returns>
public double CompareWith(ImageHash compareWith)
{
if (HashData.Length != compareWith.HashData.Length)
{
throw new Exception("Cannot compare hashes with different sizes");
}
int differenceCounter = 0;
for (int i = 0; i < HashData.Length; i++)
{
if (HashData[i] != compareWith.HashData[i])
{
differenceCounter++;
}
}
return(100 - differenceCounter / 100.0 * HashData.Length / 2.0);
}