Function Tcomm.CompareBMP(var Bmp1,Bmp2: TBitmap):boolean;
var
begin //如何比较??相同返回True,不同返回False.
//只需要知道相同不相同就可以了,不需要细致,最好能整体比较,效率高的方法,谢谢!!!!
// 已经知道:Bmp1,Bmp2大小、颜色数都是相同的
end;
var
begin //如何比较??相同返回True,不同返回False.
//只需要知道相同不相同就可以了,不需要细致,最好能整体比较,效率高的方法,谢谢!!!!
// 已经知道:Bmp1,Bmp2大小、颜色数都是相同的
end;
begin
P1 := Bmp1.ScanLine[i];
P2 := Bmp2.ScanLine[i]; if P1 <> P2 then
begin
Flag:=False;
break ;
end;
end;
我这样,但不行
begin
P1 := Bmp1.ScanLine[i];
P2 := Bmp2.ScanLine[i];
for j := 0 to Bmp1.Width -1 do
begin
if P1[j] <> P2[j] then
begin
Flag:=False;
break ;
end;
end; end;
我这样,也不行
大家帮帮忙呀,谢谢!
var Total, Match, Differ: integer): Boolean;
type
TRGBTripleArray = array[WORD] OF TRGBTriple;
pRGBTripleArray = ^TRGBTripleArray;var
i : INTEGER;
j : INTEGER;
rowA: pRGBTripleArray;
rowB: pRGBTripleArray;
begin
Result := False;
Assert((BitmapA.width = BitmapB.width) and
(BitmapA.height = BitmapB.height), 'Different Sizes');
BitmapA.PixelFormat := pf24bit;
BitmapB.PixelFormat := pf24bit; Total := BitmapA.width * BitmapA.height;
Match := 0;
Differ := 0; for j := 0 to Pred(BitmapA.height) do
begin
rowA := BitmapA.Scanline[j];
rowB := BitmapB.Scanline[j];
for i := 0 tO Pred(BitmapA.width) do
begin
if (rowA[i].rgbtRed = rowB[i].rgbtRed) and
(rowA[i].rgbtGreen = rowB[i].rgbtGreen) and
(rowA[i].rgbtBlue = rowB[i].rgbtBlue)
then Inc(Match)
else Inc(Differ);
end;
end;
if Differ = 0 then Result := False;
end;procedure TForm1.Button1Click(Sender: TObject);
var
Bitmap1: TBitmap;
Bitmap2: TBitmap;
PixelsDiffer: Integer;
PixelsMatch : Integer;
PixelsTotal : Integer;
Rtn: Boolean;
begin
Bitmap1 := TBitmap.Create;
Bitmap2 := TBitmap.Create;
try
Bitmap1.LoadFromFile('ViewSMSLogo.bmp');
Bitmap2.LoadFromFile('ViewStationLogo.bmp'); Rtn := CompareBitmaps(Bitmap1, Bitmap2, PixelsTotal, PixelsMatch, PixelsDiffer);
if not rtn then
ShowMessage(Format('Different BitMap: Total=%d, Match=%d, Differ=%d', [PixelsTotal, PixelsMatch, PixelsDiffer]));
finally
Bitmap1.Free;
Bitmap2.Free
end;
end;
var
AStream: TFileStream;
AMD5: TMd5Digest;
StrA, StrB: string;
begin
Bmp1.SaveToFile('C:\A');
AStream := TFileStream.Create('C:\A', fmOpenRead);
try
SetString(StrA, nil, AStream.Size);
AStream.Read(Pointer(StrA)^, AStream.Size);
StrA := AMD5.Md5(StrA);
finally
AStream.Free;
end;
Bmp2.SaveToFile('C:\A');
AStream := TFileStream.Create('C:\A', fmOpenRead);
try
SetString(StrB, nil, AStream.Size);
AStream.Read(Pointer(StrB)^, AStream.Size);
StrB := AMD5.Md5(StrB);
finally
AStream.Free;
end;
Result := StrA = StrB;end;
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls,
Dialogs, StdCtrls, ExtCtrls;
type
TIntData = array of Integer; TMd5Digest = class
protected
function Add(X, Y: Integer): Integer;
function Rol(X, n: Integer): Integer;
function Cmn(q, a, b, x, s, t: Integer): Integer;
function Cvt(S: String): TIntData;
function rHex(X: Integer): String;
function ff(a, b, c, d, x, s, t: Integer): Integer;
function gg(a, b, c, d, x, s, t: Integer): Integer;
function hh(a, b, c, d, x, s, t: Integer): Integer;
function ii(a, b, c, d, x, s, t: Integer): Integer;
public
function Md5(S: String): String;
published end;
implementation{ TMd5Digest }function TMd5Digest.Add(X, Y: Integer): Integer;
var
lsw, msw: Integer;
begin
lsw := (X and $ffff) + (Y and $ffff);
msw := (X shr 16) + (Y shr 16) + (lsw shr 16);
Result := (msw shl 16) or (lsw and $ffff);
end;function TMd5Digest.Cmn(q, a, b, x, s, t: Integer): Integer;
begin
Result := Add(Rol(Add(Add(a, q), Add(x, t)), s), b);
end;function TMd5Digest.Cvt(S: String): TIntData;
var
nblk: Integer;
len, i: Integer;
begin
len := Length(S);
nblk := ((len + 8) shr 6) + 1;
SetLength(Result, nblk * 16);
for i := 0 to (nblk * 16 - 1) do Result[i] := 0;
for i := 0 to len - 1 do
Result[i shr 2] := Result[i shr 2] or
(Ord(S[i + 1]) shl ((i mod 4) * 8));
Result[len shr 2] := Result[len shr 2] or
($80 shl ((len mod 4) * 8));
Result[nblk * 16 - 2] := len * 8;
end;function TMd5Digest.ff(a, b, c, d, x, s, t: Integer): Integer;
begin
Result := Cmn((b and c) or (not b and d), a, b, x, s, t);
end;function TMd5Digest.gg(a, b, c, d, x, s, t: Integer): Integer;
begin
Result := Cmn((b and d) or (c and not d), a, b, x, s, t);
end;function TMd5Digest.hh(a, b, c, d, x, s, t: Integer): Integer;
begin
Result := Cmn(b xor c xor d, a, b, x, s, t);
end;function TMd5Digest.ii(a, b, c, d, x, s, t: Integer): Integer;
begin
Result := Cmn(c xor (b or not d), a, b, x, s, t);
end;function TMd5Digest.Md5(S: String): String;
var
x: TIntData;
a, b, c, d: Integer;
olda, oldb, oldc, oldd: Integer;
len, i: Integer;
begin
x := Cvt(S);
len := Length(x);
a := 1732584193;
b := -271733879;
c := -1732584194;
d := 271733878; i := 0;
while i < len do begin
olda := a;
oldb := b;
oldc := c;
oldd := d; a := ff(a, b, c, d, x[i+ 0], 7 , -680876936);
d := ff(d, a, b, c, x[i+ 1], 12, -389564586);
c := ff(c, d, a, b, x[i+ 2], 17, 606105819);
b := ff(b, c, d, a, x[i+ 3], 22, -1044525330);
a := ff(a, b, c, d, x[i+ 4], 7 , -176418897);
d := ff(d, a, b, c, x[i+ 5], 12, 1200080426);
c := ff(c, d, a, b, x[i+ 6], 17, -1473231341);
b := ff(b, c, d, a, x[i+ 7], 22, -45705983);
a := ff(a, b, c, d, x[i+ 8], 7 , 1770035416);
d := ff(d, a, b, c, x[i+ 9], 12, -1958414417);
c := ff(c, d, a, b, x[i+10], 17, -42063);
b := ff(b, c, d, a, x[i+11], 22, -1990404162);
a := ff(a, b, c, d, x[i+12], 7 , 1804603682);
d := ff(d, a, b, c, x[i+13], 12, -40341101);
c := ff(c, d, a, b, x[i+14], 17, -1502002290);
b := ff(b, c, d, a, x[i+15], 22, 1236535329); a := gg(a, b, c, d, x[i+ 1], 5 , -165796510);
d := gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
c := gg(c, d, a, b, x[i+11], 14, 643717713);
b := gg(b, c, d, a, x[i+ 0], 20, -373897302);
a := gg(a, b, c, d, x[i+ 5], 5 , -701558691);
d := gg(d, a, b, c, x[i+10], 9 , 38016083);
c := gg(c, d, a, b, x[i+15], 14, -660478335);
b := gg(b, c, d, a, x[i+ 4], 20, -405537848);
a := gg(a, b, c, d, x[i+ 9], 5 , 568446438);
d := gg(d, a, b, c, x[i+14], 9 , -1019803690);
c := gg(c, d, a, b, x[i+ 3], 14, -187363961);
b := gg(b, c, d, a, x[i+ 8], 20, 1163531501);
a := gg(a, b, c, d, x[i+13], 5 , -1444681467);
d := gg(d, a, b, c, x[i+ 2], 9 , -51403784);
c := gg(c, d, a, b, x[i+ 7], 14, 1735328473);
b := gg(b, c, d, a, x[i+12], 20, -1926607734); a := hh(a, b, c, d, x[i+ 5], 4 , -378558);
d := hh(d, a, b, c, x[i+ 8], 11, -2022574463);
c := hh(c, d, a, b, x[i+11], 16, 1839030562);
b := hh(b, c, d, a, x[i+14], 23, -35309556);
a := hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
d := hh(d, a, b, c, x[i+ 4], 11, 1272893353);
c := hh(c, d, a, b, x[i+ 7], 16, -155497632);
b := hh(b, c, d, a, x[i+10], 23, -1094730640);
a := hh(a, b, c, d, x[i+13], 4 , 681279174);
d := hh(d, a, b, c, x[i+ 0], 11, -358537222);
c := hh(c, d, a, b, x[i+ 3], 16, -722521979);
b := hh(b, c, d, a, x[i+ 6], 23, 76029189);
a := hh(a, b, c, d, x[i+ 9], 4 , -640364487);
d := hh(d, a, b, c, x[i+12], 11, -421815835);
c := hh(c, d, a, b, x[i+15], 16, 530742520);
b := hh(b, c, d, a, x[i+ 2], 23, -995338651); a := ii(a, b, c, d, x[i+ 0], 6 , -198630844);
d := ii(d, a, b, c, x[i+ 7], 10, 1126891415);
c := ii(c, d, a, b, x[i+14], 15, -1416354905);
b := ii(b, c, d, a, x[i+ 5], 21, -57434055);
a := ii(a, b, c, d, x[i+12], 6 , 1700485571);
d := ii(d, a, b, c, x[i+ 3], 10, -1894986606);
c := ii(c, d, a, b, x[i+10], 15, -1051523);
b := ii(b, c, d, a, x[i+ 1], 21, -2054922799);
a := ii(a, b, c, d, x[i+ 8], 6 , 1873313359);
d := ii(d, a, b, c, x[i+15], 10, -30611744);
c := ii(c, d, a, b, x[i+ 6], 15, -1560198380);
b := ii(b, c, d, a, x[i+13], 21, 1309151649);
a := ii(a, b, c, d, x[i+ 4], 6 , -145523070);
d := ii(d, a, b, c, x[i+11], 10, -1120210379);
c := ii(c, d, a, b, x[i+ 2], 15, 718787259);
b := ii(b, c, d, a, x[i+ 9], 21, -343485551); a := add(a, olda);
b := add(b, oldb);
c := add(c, oldc);
d := add(d, oldd);
i := i + 16;
end;
Result := rHex(a) + rHex(b) + rHex(c) + rHex(d);
end;function TMd5Digest.rHex(X: Integer): String;
const
HexChs: String = '0123456789abcdef';
var
i: Integer;
begin
SetLength(Result, 8);
//for i := 1 to 8 do
// Result[i] := HexChs[(X shr ((8 - i) shl 2)) and $f + 1];
//转换为16进制的表示方法和IntToHex的不同
for i := 0 to 3 do begin
Result[i * 2 + 1] := HexChs[(X shr (i * 8 + 4)) and $f + 1];
Result[i * 2 + 2] := HexChs[(X shr (i * 8)) and $f + 1];
end;
end;function TMd5Digest.Rol(X, n: Integer): Integer;
begin
//Bitwise rotate a 32-bit number to the left
Result := (X shl n) or (X shr (32 - n));
end;end.
type
PRGBTripleArray = ^TRGBTripleArray;
TRGBTripleArray = array[0..32767] of TRGBTriple;
var
x, y: integer;
p0, p1: PRGBTripleArray;
sBmp, dBmp: TBitMap;
begin
Result := False; if (bmp1.Height <> bmp2.Height) or
(bmp1.Width <> bmp2.Width) then
begin
Exit;
end; sBmp := TBitmap.Create;
dBmp := TBitmap.Create;
try
sBmp.Assign(bmp1);
dBmp.Assign(bmp2);
sBmp.PixelFormat := pf24bit;
dBmp.PixelFormat := pf24bit;
for y := 0 to sBmp.Height - 1 do
begin
p0 := sBmp.ScanLine[y];
p1 := dBmp.ScanLine[y];
for x := 0 to sBmp.Width - 1 do
if (p0[x].rgbtBlue = p1[x].rgbtBlue) and
(p0[x].rgbtGreen = p1[x].rgbtGreen) and
(p0[x].rgbtRed = p1[x].rgbtRed) then
begin
Result := True;
end
else
begin
Break;
end;
end;
finally
sBmp.Free;
dBmp.Free;
end;
end;procedure TForm1.Button1Click(Sender: TObject);
begin
if IsHomology(SpeedButton1.Glyph, SpeedButton2.Glyph) then
showmessage('相同');
end;-------------------------------------------------------
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