faceroi.h
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// faceroi.h: face ROI, and translation from image frame to the ROI
//
// Copyright (C) 2005-2013, Stephen Milborrow
#ifndef STASM_FACEROI_H
#define STASM_FACEROI_H
namespace stasm
{
// RoiFrac controls the size of the ROI area around the face. So for
// example leftfrac is the distance from the center to the left margin in
// units of the original detector rect width. So ROI_FRAC=.5, say, would
// return the original face detector rectangle.
static const double ROI_FRAC = 1.0; // ROI is double the face detector width
Shape ImgShapeToRoiFrame( // return shape in ROI frame
const Shape& shape, // in: shape in image frame
const DetPar& detpar_roi, // in: detpar wrt the ROI
const DetPar& detpar); // in
Shape RoiShapeToImgFrame( // return shape in image frame
const Shape& shape, // in: shape in roi frame
const Image& face_roi, // in
const DetPar& detpar_roi, // in: detpar wrt the ROI
const DetPar& detpar); // in: detpar wrt the image
void PossiblySetRotToZero( // avoid rotating the image unnecessarily
double& rot); // io
void FaceRoiAndDetPar( // extract ROI around the face, rotate if necessary
Image& face_roi, // out
DetPar& detpar_roi, // out: detpar wrt the ROI
const Image& img, // in: original image
const DetPar& detpar, // in: wrt img frame, only x,y,w,h,rot used
bool flip, // in: mirror the ROI
double botfrac = ROI_FRAC, // in: distance from center to bottom marg
double leftfrac = ROI_FRAC, // in: dist from center to left marg
double topfrac = ROI_FRAC, // in
double rightfrac = ROI_FRAC); // in
} // namespace stasm
#endif // STASM_FACEROI_H