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// Copyright (c) the JPEG XL Project Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "lib/jxl/enc_dot_dictionary.h"
#include <stddef.h>
#include <string.h>
#include <array>
#include <utility>
#include "lib/jxl/base/override.h"
#include "lib/jxl/base/status.h"
#include "lib/jxl/chroma_from_luma.h"
#include "lib/jxl/dec_bit_reader.h"
#include "lib/jxl/dec_xyb.h"
#include "lib/jxl/enc_bit_writer.h"
#include "lib/jxl/enc_detect_dots.h"
#include "lib/jxl/enc_params.h"
#include "lib/jxl/enc_xyb.h"
#include "lib/jxl/image.h"
namespace jxl {
// Private implementation of Dictionary Encode/Decode
namespace {
/* Quantization constants for Ellipse dots */
const size_t kEllipsePosQ = 2; // Quantization level for the position
const double kEllipseMinSigma = 0.1; // Minimum sigma value
const double kEllipseMaxSigma = 3.1; // Maximum Sigma value
const size_t kEllipseSigmaQ = 16; // Number of quantization levels for sigma
const size_t kEllipseAngleQ = 8; // Quantization level for the angle
// TODO: fix these values.
const std::array<double, 3> kEllipseMinIntensity{{-0.05, 0.0, -0.5}};
const std::array<double, 3> kEllipseMaxIntensity{{0.05, 1.0, 0.4}};
const std::array<size_t, 3> kEllipseIntensityQ{{10, 36, 10}};
} // namespace
std::vector<PatchInfo> FindDotDictionary(const CompressParams& cparams,
const Image3F& opsin,
const ColorCorrelationMap& cmap,
ThreadPool* pool) {
if (ApplyOverride(cparams.dots,
cparams.butteraugli_distance >= kMinButteraugliForDots)) {
GaussianDetectParams ellipse_params;
ellipse_params.t_high = 0.04;
ellipse_params.t_low = 0.02;
ellipse_params.maxWinSize = 5;
ellipse_params.maxL2Loss = 0.005;
ellipse_params.maxCustomLoss = 300;
ellipse_params.minIntensity = 0.12;
ellipse_params.maxDistMeanMode = 1.0;
ellipse_params.maxNegPixels = 0;
ellipse_params.minScore = 12.0;
ellipse_params.maxCC = 100;
ellipse_params.percCC = 100;
EllipseQuantParams qParams{
opsin.xsize(), opsin.ysize(), kEllipsePosQ,
kEllipseMinSigma, kEllipseMaxSigma, kEllipseSigmaQ,
kEllipseAngleQ, kEllipseMinIntensity, kEllipseMaxIntensity,
kEllipseIntensityQ, kEllipsePosQ <= 5, cmap.YtoXRatio(0),
cmap.YtoBRatio(0)};
return DetectGaussianEllipses(opsin, ellipse_params, qParams, pool);
}
return {};
}
} // namespace jxl
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