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added number of bands cropping in multi-bands blending

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This commit is contained in:
Alexey Spizhevoy 2011-05-25 13:14:56 +00:00
parent c65a39be82
commit 052bf4df73
2 changed files with 12 additions and 3 deletions
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9
modules/stitching/blenders.cpp
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@ -158,8 +158,15 @@ void FeatherBlender::blend(Mat &dst, Mat &dst_mask)
void MultiBandBlender::prepare(Rect dst_roi) void MultiBandBlender::prepare(Rect dst_roi)
{ {
dst_roi_final_ = dst_roi; dst_roi_final_ = dst_roi;
// Crop unnecessary bands
double max_len = static_cast<double>(max(dst_roi.width, dst_roi.height));
num_bands_ = min(actual_num_bands_, static_cast<int>(ceil(log(max_len) / log(2.0))));
// Add border to the final image, to ensure sizes are divided by (1 << num_bands_)
dst_roi.width += ((1 << num_bands_) - dst_roi.width % (1 << num_bands_)) % (1 << num_bands_); dst_roi.width += ((1 << num_bands_) - dst_roi.width % (1 << num_bands_)) % (1 << num_bands_);
dst_roi.height += ((1 << num_bands_) - dst_roi.height % (1 << num_bands_)) % (1 << num_bands_); dst_roi.height += ((1 << num_bands_) - dst_roi.height % (1 << num_bands_)) % (1 << num_bands_);
Blender::prepare(dst_roi); Blender::prepare(dst_roi);
dst_pyr_laplace_.resize(num_bands_ + 1); dst_pyr_laplace_.resize(num_bands_ + 1);
@ -186,12 +193,14 @@ void MultiBandBlender::feed(const Mat &img, const Mat &mask, Point tl)
CV_Assert(img.type() == CV_16SC3); CV_Assert(img.type() == CV_16SC3);
CV_Assert(mask.type() == CV_8U); CV_Assert(mask.type() == CV_8U);
// Keep source image in memory with small border
int gap = 3 * (1 << num_bands_); int gap = 3 * (1 << num_bands_);
Point tl_new(max(dst_roi_.x, tl.x - gap), Point tl_new(max(dst_roi_.x, tl.x - gap),
max(dst_roi_.y, tl.y - gap)); max(dst_roi_.y, tl.y - gap));
Point br_new(min(dst_roi_.br().x, tl.x + img.cols + gap), Point br_new(min(dst_roi_.br().x, tl.x + img.cols + gap),
min(dst_roi_.br().y, tl.y + img.rows + gap)); min(dst_roi_.br().y, tl.y + img.rows + gap));
// Ensure coordinates of top-left, bootom-right corners are divided by (1 << num_bands_)
tl_new.x = dst_roi_.x + (((tl_new.x - dst_roi_.x) >> num_bands_) << num_bands_); tl_new.x = dst_roi_.x + (((tl_new.x - dst_roi_.x) >> num_bands_) << num_bands_);
tl_new.y = dst_roi_.y + (((tl_new.y - dst_roi_.y) >> num_bands_) << num_bands_); tl_new.y = dst_roi_.y + (((tl_new.y - dst_roi_.y) >> num_bands_) << num_bands_);
int width = br_new.x - tl_new.x; int width = br_new.x - tl_new.x;

6
modules/stitching/blenders.hpp
View File

@ -84,15 +84,15 @@ class MultiBandBlender : public Blender
{ {
public: public:
MultiBandBlender(int num_bands = 5) { setNumBands(num_bands); } MultiBandBlender(int num_bands = 5) { setNumBands(num_bands); }
int numBands() const { return num_bands_; } int numBands() const { return actual_num_bands_; }
void setNumBands(int val) { num_bands_ = val; } void setNumBands(int val) { actual_num_bands_ = val; }
void prepare(cv::Rect dst_roi); void prepare(cv::Rect dst_roi);
void feed(const cv::Mat &img, const cv::Mat &mask, cv::Point tl); void feed(const cv::Mat &img, const cv::Mat &mask, cv::Point tl);
void blend(cv::Mat &dst, cv::Mat &dst_mask); void blend(cv::Mat &dst, cv::Mat &dst_mask);
private: private:
int num_bands_; int actual_num_bands_, num_bands_;
std::vector<cv::Mat> dst_pyr_laplace_; std::vector<cv::Mat> dst_pyr_laplace_;
std::vector<cv::Mat> dst_band_weights_; std::vector<cv::Mat> dst_band_weights_;
cv::Rect dst_roi_final_; cv::Rect dst_roi_final_;