各位前輩好:
以下有個影像強化的範例，但是速度有點慢，請問能否加快執行速度呢?


[code cpp]
[code cpp]
void stretch(TImage *Image1,int max,int min) //伸張強化
{
for (int j=0;jHeight;j )
{
for (int i=0;iWidth;i )
{
int R=GetRValue(Image1->Canvas->Pixels[i][j]);
int G=GetGValue(Image1->Canvas->Pixels[i][j]);
int B=GetBValue(Image1->Canvas->Pixels[i][j]); if(R<=min || R>=max)
{if(R<=min){R=0;}else{R=255;}}
else
{R= (R-min)*255 / (max-min);}
if(G<=min || G>=max)
{if(G<=min){G=0;}else{G=255;}}
else
{G= (G-min)*255 / (max-min);}
if(B<=min || B>=max)
{if(B<=min){B=0;}else{B=255;}}
else
{B= (B-min)*255 / (max-min);}
Image1->Picture->Bitmap->Canvas->Pixels[i][j]=RGB(check(R),check(G),check(B));
}
}
}
[/code]
[/code]

編輯記錄

請搜尋ScanLine的用法^_^

請問是這樣嗎?


[code cpp]
void stretch(TImage *Image1,int max,int min) //伸張強化
{
Byte **ptr;
int R, G, B, index;
Image1->Picture->Bitmap->PixelFormat = pf24bit;
ptr = new Byte*[Image1->Picture->Height];
for (int k=0; k<=Image1->Height; k )
ptr[k] = (Byte*) Image1->Picture->Bitmap->ScanLine[k];
for (int row=0; row<=Image1->Height; row )
{ index = 0;
for (int col=0; col<=Image1->Width; col )
{ B = ptr[row][index ];
G = ptr[row][index 1];
R = ptr[row][index 2];
if(R<=min || R>=max)
{if(R<=min){R=0;}else{R=255;}}
else
{R= (R-min)*255 / (max-min);}
if(G<=min || G>=max)
{if(G<=min){G=0;}else{G=255;}}
else
{G= (G-min)*255 / (max-min);}
if(B<=min || B>=max)
{if(B<=min){B=0;}else{B=255;}}
else
{B= (B-min)*255 / (max-min);}
Image1->Picture->Assign(Image1);
}
}
}
[/code]


===================引 用 taishyang 文 章===================
請搜尋ScanLine的用法^_^

請參考下面連結的用法
http://delphi.ktop.com.tw/board.php?cid=168&fid=921&tid=88279

編輯記錄