Compare two bitmaps (Views: 27)
Problem/Question/Abstract: How to compare two bitmaps Answer: If you really only need to know if they're 100% identical then there is a pretty fast way by reading the bitmaps in strings via a MemoryStream: { ... } begin MemStream := TMemoryStream.Create; try Bmp1.SaveToStream(MemStream); MemStream.Position := 0; SetLength(S1, MemStream.Size); MemStream.Read(S1[1], Length(S1)); MemStream.Clear; Bmp2.SaveToStream(MemStream); MemStream.Position := 0; SetLength(S2, MemStream.Size); MemStream.Read(S2[1], Length(S2)); finally MemStream.Free; end; if S1 = S2 then {they are identically}; end; |