248 lines
7.9 KiB
C++
248 lines
7.9 KiB
C++
/* -*- C++ -*-
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*
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* This file is part of RawTherapee.
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*
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* Copyright (c) 2018 Alberto Griggio <alberto.griggio@gmail.com>
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*
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* RawTherapee is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* RawTherapee is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with RawTherapee. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "pdaflinesfilter.h"
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#include "settings.h"
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#include <iostream>
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namespace rtengine {
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extern const Settings *settings;
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namespace {
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class PDAFGreenEqulibrateThreshold: public RawImageSource::GreenEqulibrateThreshold {
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static constexpr float base_threshold = 0.5f;
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public:
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PDAFGreenEqulibrateThreshold(int w, int h, int ntiles=20):
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RawImageSource::GreenEqulibrateThreshold(base_threshold),
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w_(w),
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h_(h)
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{
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tw_ = (w_ + 1) / ntiles;
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th_ = (h_ + 1) / ntiles;
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area_ = tw_ * th_;
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tiles_.resize(ntiles+1, std::vector<int>(ntiles+1));
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}
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void increment(int row, int col)
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{
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auto &r = tiles_[row / th_];
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++r[col / tw_];
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}
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float operator()(int row, int col) const
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{
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int y = row / th_;
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int x = col / tw_;
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float f = tile_factor(y, x);
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int cy = y * th_ + th_/2;
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int cx = x * tw_ + tw_/2;
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if (std::abs(y - cy) > std::abs(x - cx)) {
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int y1 = y > cy ? y+1 : y-1;
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if (y1 >= 0 && size_t(y1) < tiles_.size()) {
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float f2 = tile_factor(y1, x);
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int d = std::abs(cy - row);
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f = f * float(th_ - d)/float(th_) + f2 * float(d)/float(th_);
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}
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} else {
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int x1 = x > cx ? x+1 : x-1;
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if (x1 >= 0 && size_t(x1) < tiles_[y].size()) {
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float f2 = tile_factor(y, x1);
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int d = std::abs(cx - col);
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f = f * float(tw_ - d)/float(tw_) + f2 * float(d)/float(tw_);
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}
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}
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return thresh_ * f;
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}
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void print() const
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{
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std::cout << "PDAFGreenEqulibrateThreshold:\n";
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for (size_t row = 0; row < tiles_.size(); ++row) {
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for (size_t col = 0; col < tiles_.size(); ++col) {
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std::cout << " " << tile_factor(row, col);
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}
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std::cout << std::endl;
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}
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}
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private:
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float tile_factor(int y, int x) const
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{
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return float(tiles_[y][x] * 12) / area_;
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}
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int w_;
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int h_;
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int ntiles_;
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int tw_;
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int th_;
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float area_;
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std::vector<std::vector<int>> tiles_;
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};
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} // namespace
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PDAFLinesFilter::PDAFLinesFilter(RawImage *ri):
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ri_(ri),
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W_(ri->get_width()),
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H_(ri->get_height())
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{
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gthresh_ = new PDAFGreenEqulibrateThreshold(W_, H_);
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if (ri_->get_maker() == "Sony") {
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if (ri_->get_model() == "ILCE-7M3") {
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// A7III, from https://www.dpreview.com/forums/post/60843139
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// in the original post:
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// P 5 P 17 P 11 P 11 P 17 P 11 P 5 P 11 P 11 P 11 P 17 P 11 P 5 P 11 P 11 P 17 P 5 P 11 P 17 P 5 P 17 P 5 P 11 P 11 P 11 P 17 P 5 P 11 P 11 P 11 P 5 P 17 P 5 P 17 P 11
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//
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// rotated to match the start of the frame
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// P 11 P 11 P 11 P 17 P 11 P 5 P 11 P 11 P 17 P 5 P 11 P 17 P 5 P 17 P 5 P 11 P 11 P 11 P 17 P 5 P 11 P 11 P 11 P 5 P 17 P 5 P 17 P 11 P 5 P 17 P 11 P 11 P 17 P 11 P 5
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pattern_ = {
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0, 12, 24, 36, 54, 66, 72, 84, 96, 114, 120, 132, 150, 156, 174, 180, 192, 204, 216, 234, 240, 252, 264, 276, 282, 300, 306, 324, 336, 342, 360, 372, 384, 402, 414, 420
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};
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offset_ = 9;
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} else if (ri_->get_model() == "ILCE-6000") {
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// detected by hand, using the picture from https://www.dpreview.com/forums/thread/3923513
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// P 11 P 23 P 17 P 17 P 17 P 23 P 11 P 17 P 17 P 17 P 23 P 11 P 23 P 11 P 17 P 23 P 11 P 17 P 17 P 23 P 17 P 11 P 17 P 17 P 17 P 23 P 17 P 11 P 17 P 17 P 23 P 11 P 17 P 11 P 23
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pattern_ = {
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0, 12, 36, 54, 72, 90, 114, 126, 144, 162, 180, 204, 216, 240, 252, 270, 294, 306, 324, 342, 366, 384, 396, 414, 432, 450, 474, 492, 504, 522, 540, 564, 576, 594, 606, 630
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};
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offset_ = 3;
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} else if (ri_->get_model() == "ILCE-9") {
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// the A9 is the same as the A7III, rotated of 1 position
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// source: https://www.dpreview.com/forums/post/60857788
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// P 11 P 11 P 11 P 17 P 11 P 5 P 11 P 11 P 17 P 5 P 11 P 17 P 5 P 17 P 5 P 11 P 11 P 11 P 17 P 5 P 11 P 11 P 11 P 5 P 17 P 5 P 17 P 11 P 5 P 17 P 11 P 11 P 17 P 11 P 5
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pattern_ = {
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0, 12, 24, 36, 54, 66, 72, 84, 96, 114, 120, 132, 150, 156, 174, 180, 192, 204, 216, 234, 240, 252, 264, 276, 282, 300, 306, 324, 336, 342, 360, 372, 384, 402, 414, 420
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};
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offset_ = -7;
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}
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}
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}
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PDAFLinesFilter::~PDAFLinesFilter()
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{
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delete gthresh_;
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}
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RawImageSource::GreenEqulibrateThreshold &PDAFLinesFilter::greenEqThreshold()
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{
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return *gthresh_;
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}
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int PDAFLinesFilter::markLine(array2D<float> &rawData, PixelsMap &bpMap, int y)
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{
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rowmap_.clear();
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rowmap_.resize((W_+1)/2, false);
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int marked = 0;
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for (int x = 1; x < W_-1; ++x) {
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if (ri_->FC(y, x) == 1) {
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const float
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g0 = rawData[y][x],
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g1 = rawData[y-1][x+1],
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g2 = rawData[y+1][x+1],
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g3 = rawData[y-1][x-1],
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g4 = rawData[y+1][x-1];
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if (g0 > max(g1, g2, g3, g4)) {
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const float gu = (g2 + g4) / 2.f;
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const float gd = (g1 + g3) / 2.f;
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const float gM = max(gu, gd);
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const float gm = min(gu, gd);
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const float d = (gM - gm) / gM;
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if (d < 0.2f && (g0 - (gm + gM)/2.f) / g0 > std::min(d, 0.1f)) {
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rowmap_[x/2] = true;
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}
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}
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}
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}
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PDAFGreenEqulibrateThreshold *m = static_cast<PDAFGreenEqulibrateThreshold *>(gthresh_);
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for (int x = 2; x < W_-2; ++x) {
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if (ri_->FC(y, x) == 1) {
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const int i = x/2;
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if (rowmap_[i-1] && rowmap_[i] && rowmap_[i+1]) {
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for (int xx = x-2; xx <= x+2; ++xx) {
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if (!bpMap.get(xx, y)) {
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bpMap.set(xx, y);
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m->increment(y, xx);
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++marked;
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}
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}
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}
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}
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}
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return marked;
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}
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int PDAFLinesFilter::mark(array2D<float> &rawData, PixelsMap &bpMap)
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{
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if (pattern_.empty()) {
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if (settings->verbose) {
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std::cout << "no PDAF pattern known for " << ri_->get_maker() << " " << ri_->get_model() << std::endl;
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}
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return 0;
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}
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size_t idx = 0;
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int off = offset_;
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int found = 0;
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for (int y = 1; y < H_-1; ++y) {
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int yy = pattern_[idx] + off;
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if (y == yy) {
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int n = markLine(rawData, bpMap, y) + markLine(rawData, bpMap, y-1) + markLine(rawData, bpMap, y+1);
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if (n) {
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found += n;
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if (settings->verbose) {
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std::cout << "marked " << n << " pixels in PDAF line at " << y << std::endl;
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}
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}
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} else if (y > yy) {
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++idx;
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if (idx >= pattern_.size()) {
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idx = 0;
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off += pattern_.back();
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}
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}
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}
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if (settings->verbose) {
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static_cast<PDAFGreenEqulibrateThreshold *>(gthresh_)->print();
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}
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return found;
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}
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} // namespace rtengine
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