%indent
* 画像変換 [#ba478ff1]
*** Bitmap ==> Mat [#t35bb635]
- cf: http://www42.atwiki.jp/jfactory/pages/23.html
- cf: http://bicycle.life.coocan.jp/takamints/index.php/doc/opencv/doc/Mat_conversion
- cf: http://imagingsolution.blog107.fc2.com/blog-entry-90.html
- BitmapのPixelFormatとcvCreateImageのdepth,channelを対応させる必要あり:
|*Bitmap |*cvCreateImage|<|
|*PixelFormat |*depth|*channel|tx:
| Format8bppIndexed|8 |1 |
| Format24bppRgb |8 |3 |tx:
| Format32bppRgba |8 |4 |tx:
|*PixelFormat |*depth|lx:*channel|tx:
| Format8bppIndexed|8 |lx:1 |
| Format24bppRgb |8 |lx:3 |tx:
| Format32bppRgba |8 |lx:4 |tx:
### cpp
static Mat ToMat(Bitmap^ bitmap) {
return Mat(ToIpl(bitmap));
}
static IplImage* ToIpl(Bitmap^ bitmap) {
auto format = PixelFormat::Format32bppArgb;
auto size = cvSize(bitmap->Width, bitmap->Height);
int depth = 8;
int channel = 4;
if (bitmap == nullptr) return 0;
if (bitmap->PixelFormat != format) return 0;
IplImage* ipl = cvCreateImage(size, depth, channel);
BitmapData^ data = bitmap->LockBits(
Drawing::Rectangle(0, 0, bitmap->Width, bitmap->Height),
ImageLockMode::ReadWrite,
format
);
memcpy_s(ipl->imageData, ipl->widthStep * ipl->height,
data->Scan0.ToPointer(), data->Stride * data->Height
);
return (ipl);
}
###