我这里有源码:unit Unit1;interfaceuses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls;type TForm1 = class(TForm) Button1: TButton; OpenDialog1: TOpenDialog; Edit1: TEdit; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end;var Form1: TForm1;implementation uses GBlur2; {$R *.DFM}procedure TForm1.Button1Click(Sender: TObject); var b: TBitmap; begin if not openDialog1.Execute then exit; b:= TBitmap.Create; b.LoadFromFile(OpenDialog1.Filename); b.PixelFormat:= pf24Bit; Canvas.Draw(0, 0, b); GBlur(b, StrToFloat(Edit1.text)); Canvas.Draw(b.Width, 0, b); b.Free; end;end. GBlur2单元: unit GBlur2;interfaceuses Windows, Graphics;type PRGBTriple = ^TRGBTriple; TRGBTriple = packed record b: byte; //easier to type than rgbtBlue... g: byte; r: byte; end; PRow = ^TRow; TRow = array[0..1000000] of TRGBTriple; PPRows = ^TPRows; TPRows = array[0..1000000] of PRow; const MaxKernelSize = 100;type TKernelSize = 1..MaxKernelSize; TKernel = record Size: TKernelSize; Weights: array[-MaxKernelSize..MaxKernelSize] of single; end; //the idea is that when using a TKernel you ignore the Weights //except for Weights in the range -Size..Size.procedure GBlur(theBitmap: TBitmap; radius: double);implementationuses SysUtils;procedure MakeGaussianKernel(var K: TKernel; radius: double; MaxData, DataGranularity: double); //makes K into a gaussian kernel with standard deviation = radius. //for the current application you set MaxData = 255, //DataGranularity = 1. Now the procedure sets the value of //K.Size so that when we use K we will ignore the Weights //that are so small they can't possibly matter. (Small Size //is good because the execution time is going to be //propertional to K.Size.) var j: integer; temp, delta: double; KernelSize: TKernelSize; begin for j:= Low(K.Weights) to High(K.Weights) do begin temp:= j/radius; K.Weights[j]:= exp(- temp*temp/2); end;//now divide by constant so sum(Weights) = 1: temp:= 0; for j:= Low(K.Weights) to High(K.Weights) do temp:= temp + K.Weights[j]; for j:= Low(K.Weights) to High(K.Weights) do K.Weights[j]:= K.Weights[j] / temp; //now discard (or rather as ignorable by setting Size) //the entries that are too small to matter - //this is important, otherwise a blur with a small radius //will take as long as with a large radius... KernelSize:= MaxKernelSize; delta:= DataGranularity / (2*MaxData); temp:= 0; while (temp < delta) and (KernelSize > 1) do begin temp:= temp + 2 * K.Weights[KernelSize]; dec(KernelSize); end; K.Size:= KernelSize;//now just to be correct go back and jiggle again so the //sum of the entries we'll be using is exactly 1: temp:= 0; for j:= -K.Size to K.Size do temp:= temp + K.Weights[j]; for j:= -K.Size to K.Size do K.Weights[j]:= K.Weights[j] / temp;end;function TrimInt(Lower, Upper, theInteger: integer): integer; begin if (theInteger <= Upper) and (theInteger >= Lower) then result:= theInteger else if theInteger > Upper then result:= Upper else result:= Lower; end;function TrimReal(Lower, Upper: integer; x: double): integer; begin if (x < upper) and (x >= lower) then result:= trunc(x) else if x > Upper then result:= Upper else result:= Lower; end;procedure BlurRow(var theRow: array of TRGBTriple; K: TKernel; P: PRow); var j, n, LocalRow: integer; tr, tg, tb: double; //tempRed, etc w: double; beginfor j:= 0 to High(theRow) do begin tb:= 0; tg:= 0; tr:= 0; for n:= -K.Size to K.Size do begin w:= K.Weights[n];//the TrimInt keeps us from running off the edge of the row... with theRow[TrimInt(0, High(theRow), j - n)] do begin tb:= tb + w * b; tg:= tg + w * g; tr:= tr + w * r; end; end; with P[j] do begin b:= TrimReal(0, 255, tb); g:= TrimReal(0, 255, tg); r:= TrimReal(0, 255, tr); end; end;Move(P[0], theRow[0], (High(theRow) + 1) * Sizeof(TRGBTriple)); end;procedure GBlur(theBitmap: TBitmap; radius: double); var Row, Col: integer; theRows: PPRows; K: TKernel; ACol: PRow; P:PRow; begin if (theBitmap.HandleType <> bmDIB) or (theBitmap.PixelFormat <> pf24Bit) then raise exception.Create('GBlur only works for 24-bit bitmaps'); MakeGaussianKernel(K, radius, 255, 1); GetMem(theRows, theBitmap.Height * SizeOf(PRow)); GetMem(ACol, theBitmap.Height * SizeOf(TRGBTriple));//record the location of the bitmap data: for Row:= 0 to theBitmap.Height - 1 do theRows[Row]:= theBitmap.Scanline[Row];//blur each row: P:= AllocMem(theBitmap.Width*SizeOf(TRGBTriple)); for Row:= 0 to theBitmap.Height - 1 do BlurRow(Slice(theRows[Row]^, theBitmap.Width), K, P);//now blur each column ReAllocMem(P, theBitmap.Height*SizeOf(TRGBTriple)); for Col:= 0 to theBitmap.Width - 1 do begin //- first read the column into a TRow: for Row:= 0 to theBitmap.Height - 1 do ACol[Row]:= theRows[Row][Col]; BlurRow(Slice(ACol^, theBitmap.Height), K, P);//now put that row, um, column back into the data: for Row:= 0 to theBitmap.Height - 1 do theRows[Row][Col]:= ACol[Row]; end;FreeMem(theRows); FreeMem(ACol); ReAllocMem(P, 0); end;end.
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls;type
TForm1 = class(TForm)
Button1: TButton;
OpenDialog1: TOpenDialog;
Edit1: TEdit;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation
uses GBlur2;
{$R *.DFM}procedure TForm1.Button1Click(Sender: TObject);
var b: TBitmap;
begin
if not openDialog1.Execute then exit; b:= TBitmap.Create;
b.LoadFromFile(OpenDialog1.Filename);
b.PixelFormat:= pf24Bit;
Canvas.Draw(0, 0, b);
GBlur(b, StrToFloat(Edit1.text));
Canvas.Draw(b.Width, 0, b);
b.Free;
end;end.
GBlur2单元:
unit GBlur2;interfaceuses Windows, Graphics;type
PRGBTriple = ^TRGBTriple;
TRGBTriple = packed record
b: byte; //easier to type than rgbtBlue...
g: byte;
r: byte;
end; PRow = ^TRow;
TRow = array[0..1000000] of TRGBTriple; PPRows = ^TPRows;
TPRows = array[0..1000000] of PRow;
const MaxKernelSize = 100;type TKernelSize = 1..MaxKernelSize; TKernel = record
Size: TKernelSize;
Weights: array[-MaxKernelSize..MaxKernelSize] of single;
end;
//the idea is that when using a TKernel you ignore the Weights
//except for Weights in the range -Size..Size.procedure GBlur(theBitmap: TBitmap; radius: double);implementationuses SysUtils;procedure MakeGaussianKernel(var K: TKernel; radius: double;
MaxData, DataGranularity: double);
//makes K into a gaussian kernel with standard deviation = radius.
//for the current application you set MaxData = 255,
//DataGranularity = 1. Now the procedure sets the value of
//K.Size so that when we use K we will ignore the Weights
//that are so small they can't possibly matter. (Small Size
//is good because the execution time is going to be
//propertional to K.Size.)
var j: integer; temp, delta: double; KernelSize: TKernelSize;
begin
for j:= Low(K.Weights) to High(K.Weights) do
begin
temp:= j/radius;
K.Weights[j]:= exp(- temp*temp/2);
end;//now divide by constant so sum(Weights) = 1: temp:= 0;
for j:= Low(K.Weights) to High(K.Weights) do
temp:= temp + K.Weights[j];
for j:= Low(K.Weights) to High(K.Weights) do
K.Weights[j]:= K.Weights[j] / temp;
//now discard (or rather as ignorable by setting Size)
//the entries that are too small to matter -
//this is important, otherwise a blur with a small radius
//will take as long as with a large radius...
KernelSize:= MaxKernelSize;
delta:= DataGranularity / (2*MaxData);
temp:= 0;
while (temp < delta) and (KernelSize > 1) do
begin
temp:= temp + 2 * K.Weights[KernelSize];
dec(KernelSize);
end; K.Size:= KernelSize;//now just to be correct go back and jiggle again so the
//sum of the entries we'll be using is exactly 1: temp:= 0;
for j:= -K.Size to K.Size do
temp:= temp + K.Weights[j];
for j:= -K.Size to K.Size do
K.Weights[j]:= K.Weights[j] / temp;end;function TrimInt(Lower, Upper, theInteger: integer): integer;
begin
if (theInteger <= Upper) and (theInteger >= Lower) then
result:= theInteger
else
if theInteger > Upper then
result:= Upper
else
result:= Lower;
end;function TrimReal(Lower, Upper: integer; x: double): integer;
begin
if (x < upper) and (x >= lower) then
result:= trunc(x)
else
if x > Upper then
result:= Upper
else
result:= Lower;
end;procedure BlurRow(var theRow: array of TRGBTriple; K: TKernel; P: PRow);
var j, n, LocalRow: integer; tr, tg, tb: double; //tempRed, etc
w: double;
beginfor j:= 0 to High(theRow) do
begin
tb:= 0;
tg:= 0;
tr:= 0;
for n:= -K.Size to K.Size do
begin
w:= K.Weights[n];//the TrimInt keeps us from running off the edge of the row...
with theRow[TrimInt(0, High(theRow), j - n)] do
begin
tb:= tb + w * b;
tg:= tg + w * g;
tr:= tr + w * r;
end;
end;
with P[j] do
begin
b:= TrimReal(0, 255, tb);
g:= TrimReal(0, 255, tg);
r:= TrimReal(0, 255, tr);
end;
end;Move(P[0], theRow[0], (High(theRow) + 1) * Sizeof(TRGBTriple));
end;procedure GBlur(theBitmap: TBitmap; radius: double);
var Row, Col: integer; theRows: PPRows; K: TKernel; ACol: PRow; P:PRow;
begin
if (theBitmap.HandleType <> bmDIB) or (theBitmap.PixelFormat <> pf24Bit) then
raise exception.Create('GBlur only works for 24-bit bitmaps');
MakeGaussianKernel(K, radius, 255, 1);
GetMem(theRows, theBitmap.Height * SizeOf(PRow));
GetMem(ACol, theBitmap.Height * SizeOf(TRGBTriple));//record the location of the bitmap data:
for Row:= 0 to theBitmap.Height - 1 do
theRows[Row]:= theBitmap.Scanline[Row];//blur each row:
P:= AllocMem(theBitmap.Width*SizeOf(TRGBTriple));
for Row:= 0 to theBitmap.Height - 1 do
BlurRow(Slice(theRows[Row]^, theBitmap.Width), K, P);//now blur each column
ReAllocMem(P, theBitmap.Height*SizeOf(TRGBTriple));
for Col:= 0 to theBitmap.Width - 1 do
begin
//- first read the column into a TRow:
for Row:= 0 to theBitmap.Height - 1 do
ACol[Row]:= theRows[Row][Col];
BlurRow(Slice(ACol^, theBitmap.Height), K, P);//now put that row, um, column back into the data:
for Row:= 0 to theBitmap.Height - 1 do
theRows[Row][Col]:= ACol[Row];
end;FreeMem(theRows);
FreeMem(ACol);
ReAllocMem(P, 0);
end;end.
但是本人试了一下,速度好慢,而且效果不佳,但还是要感谢你!!