void ColorTransform::ProcessFrame(FrameSetPtr input, list<FrameSetPtr>* output) {
VideoFrame* frame = dynamic_cast<VideoFrame*>(input->at(video_stream_idx_).get());
ASSERT_LOG(frame);
IplImage image;
frame->ImageView(&image);
// Read transform weights.
float weights[3];
float shift;
ifs_ >> weights[0] >> weights[1] >> weights[2] >> shift;
for (int i = 0; i < frame_height_; ++i) {
uchar* color_ptr = RowPtr<uchar>(&image, i);
for (int j = 0; j < frame_width_; ++j, color_ptr +=3 ) {
color_ptr[0] = (uchar) clamp_uchar((float)color_ptr[0] * weights[0] * shift);
color_ptr[1] = (uchar) clamp_uchar((float)color_ptr[1] * weights[1] * shift);
color_ptr[2] = (uchar) clamp_uchar((float)color_ptr[2] * weights[2] * shift);
}
}
output->push_back(input);
}
void ColorCheckerUnit::ProcessFrame(FrameSetPtr input, list<FrameSetPtr>* output) {
VideoFrame* frame = dynamic_cast<VideoFrame*>(input->at(video_stream_idx_).get());
ASSERT_LOG(frame);
IplImage image;
frame->ImageView(&image);
const VideoFrame* lum_frame = dynamic_cast<const VideoFrame*>(input->at(lum_stream_idx_).get());
ASSERT_LOG(lum_frame);
IplImage lum_image;
lum_frame->ImageView(&lum_image);
// Sum according to checker image.
vector<CvPoint3D32f> colors(256);
vector<float> pixel_num(256);
for (int i = 0; i < frame_height_; ++i) {
const uchar* mask_ptr = RowPtr<const uchar>(checker_img_, i);
uchar* color_ptr = RowPtr<uchar>(&image, i);
const uchar* lum_ptr = RowPtr<const uchar>(&lum_image, i);
for (int j = 0; j < frame_width_; ++j, ++mask_ptr, color_ptr +=3, ++lum_ptr) {
int idx = mask_ptr[0];
if (idx == 0) // Don't sample background
continue;
// Is pixel within range?
int min_val = std::min(std::min(color_ptr[0], color_ptr[1]), color_ptr[2]);
int max_val = std::max(std::max(color_ptr[0], color_ptr[1]), color_ptr[2]);
if (min_val >= min_thresh_ && max_val <= max_thresh_) {
// if (lum_ptr[0] >= min_thresh_ && lum_ptr[0] <= max_thresh_) {
++pixel_num[idx];
colors[idx] = colors[idx] + cvPoint3D32f(color_ptr[0],
color_ptr[1],
color_ptr[2]);
// Mark pixel as processed!
color_ptr[0] ^= 0xff;
color_ptr[1] ^= 0xff;
color_ptr[2] ^= 0xff;
}
}
}
if (frame_num_ != 0)
ofs_ << "\n";
// Normalize and output.
int processed_colors = 0;
for (vector<int>::const_iterator c = checker_ids_.begin(); c != checker_ids_.end(); ++c) {
if (pixel_num[*c] > 0) {
++processed_colors;
colors[*c] = colors[*c] * (1.0 / pixel_num[*c]);
}
ofs_ << *c << " " << pixel_num[*c] << " " << colors[*c].x << " "
<< colors[*c].y << " " << colors[*c].z << " ";
}
std::cout << "Frame " << frame_num_ << ": Processed colors " << processed_colors << "\n";
++frame_num_;
output->push_back(input);
}