delphixe delphi-opencv-master ToBitmap 详细代码
时间: 2024-01-06 10:05:35 浏览: 223
以下是使用 Delphi-OpenCV 库在 Delphi XE 中将 IplImage 对象转换为Bitmap 对象的详细代码:
```delphiuses
OpenCV_Core, OpenCV_ImageProc, // Delphi-OpenCV 库单元
Vcl.Graphics; // VCL 图形单元
function IplImageToBitmap(const Image: pIplImage): TBitmap;
var
Depth, Channels: Integer;
LineSize: Integer;
ImageData, SrcLine, DestLine: Pointer;
Bitmap: TBitmap;
Row, Col: Integer;
Data: Byte;
begin
Depth := Image.depth;
Channels := Image.nChannels;
LineSize := Image.width * Channels;
// 分配 Bitmap 对象
Bitmap := TBitmap.Create;
Bitmap.PixelFormat := pf24bit;
Bitmap.Width := Image.width;
Bitmap.Height := Image.height;
// 按行遍历 IplImage 数据并转换为 TBitmap 数据
ImageData := Image.imageData;
for Row := 0 to Image.height - 1 do
begin
SrcLine := ImageData + Row * Image.widthStep;
DestLine := Bitmap.ScanLine[Row];
case Depth of
IPL_DEPTH_8U:
begin
for Col := 0 to Image.width - 1 do
begin
Data := PByte(SrcLine + Col * Channels)^;
PByte(DestLine + Col * 3)^ := Data;
PByte(DestLine + Col * 3 + 1)^ := Data;
PByte(DestLine + Col * 3 + 2)^ := Data;
end;
end;
IPL_DEPTH_8S:
begin
for Col := 0 to Image.width - 1 do
begin
Data := Byte(PShortInt(SrcLine + Col * Channels)^);
PByte(DestLine + Col * 3)^ := Data;
PByte(DestLine + Col * 3 + 1)^ := Data;
PByte(DestLine + Col * 3 + 2)^ := Data;
end;
end;
IPL_DEPTH_16U:
begin
for Col := 0 to Image.width - 1 do
begin
Data := Byte(PWord(SrcLine + Col * Channels)^ shr 8);
PByte(DestLine + Col * 3)^ := Data;
PByte(DestLine + Col * 3 + 1)^ := Data;
PByte(DestLine + Col * 3 + 2)^ := Data;
end;
end;
IPL_DEPTH_16S:
begin
for Col := 0 to Image.width - 1 do
begin
Data := Byte(PShortInt(SrcLine + Col * Channels)^ shr 8 + 128);
PByte(DestLine + Col * 3)^ := Data;
PByte(DestLine + Col * 3 + 1)^ := Data;
PByte(DestLine + Col * 3 + 2)^ := Data;
end;
end;
IPL_DEPTH_32S:
begin
for Col := 0 to Image.width - 1 do
begin
Data := Byte(PInteger(SrcLine + Col * Channels)^ shr 24);
PByte(DestLine + Col * 3)^ := Data;
PByte(DestLine + Col * 3 + 1)^ := Data;
PByte(DestLine + Col * 3 + 2)^ := Data;
end;
end;
IPL_DEPTH_32F:
begin
for Col := 0 to Image.width - 1 do
begin
Data := Byte(PSingle(SrcLine + Col * Channels)^ * 255);
PByte(DestLine + Col * 3)^ := Data;
PByte(DestLine + Col * 3 + 1)^ := Data;
PByte(DestLine + Col * 3 + 2)^ := Data;
end;
end;
IPL_DEPTH_64F:
begin
for Col := 0 to Image.width - 1 do
begin
Data := Byte(PDouble(SrcLine + Col * Channels)^ * 255);
PByte(DestLine + Col * 3)^ := Data;
PByte(DestLine + Col * 3 + 1)^ := Data;
PByte(DestLine + Col * 3 + 2)^ := Data;
end;
end;
end;
end;
Result := Bitmap;
end;
```
使用方法:
```delphi
var
Image: pIplImage;
Bitmap: TBitmap;
begin
// 加载图像到 Image 变量中
Image := cvLoadImage('image.jpg');
// 将 IplImage 对象转换为 TBitmap 对象
Bitmap := IplImageToBitmap(Image);
// 将 TBitmap 对象显示在 TImage 组件上
Image1.Picture.Assign(Bitmap);
// 释放 IplImage 对象内存
cvReleaseImage(@Image);
end;
```
需要注意的是,由于 Delphi-OpenCV 库中的 IplImage 对象是指针类型的,因此需要传入指针的指针作为参数。在使用完毕后,需要手动释放 IplImage 对象的内存。
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