142 lines
4.2 KiB
C++
142 lines
4.2 KiB
C++
#pragma once
|
|
|
|
#include <array>
|
|
#include <cstdint>
|
|
#include <numeric>
|
|
|
|
#include "color.h"
|
|
#include "colors.h"
|
|
#include "coord.h"
|
|
#include "image.h"
|
|
#include "lut.h"
|
|
#include "minimum.h"
|
|
|
|
// Maximum LUT size that has each point adjacent to at least one ColorChecker color.
|
|
typedef Lut3d<4, 3, 3> ColorCheckerLut3d;
|
|
|
|
constexpr std::array<Color, 24> kColorCheckerSrgb = {{
|
|
{{{0x7300, 0x5200, 0x4400}}},
|
|
{{{0xc200, 0x9600, 0x8200}}},
|
|
{{{0x6200, 0x7a00, 0x9d00}}},
|
|
{{{0x5700, 0x6c00, 0x4300}}},
|
|
{{{0x8500, 0x8000, 0xb100}}},
|
|
{{{0x6700, 0xbd00, 0xaa00}}},
|
|
{{{0xd600, 0x7e00, 0x2c00}}},
|
|
{{{0x5000, 0x5b00, 0xa600}}},
|
|
{{{0xc100, 0x5a00, 0x6300}}},
|
|
{{{0x5e00, 0x3c00, 0x6c00}}},
|
|
{{{0x9d00, 0xbc00, 0x4000}}},
|
|
{{{0xe000, 0xa300, 0x2e00}}},
|
|
{{{0x3800, 0x3d00, 0x9600}}},
|
|
{{{0x4600, 0x9400, 0x4900}}},
|
|
{{{0xaf00, 0x3600, 0x3c00}}},
|
|
{{{0xe700, 0xc700, 0x1f00}}},
|
|
{{{0xbb00, 0x5600, 0x9500}}},
|
|
{{{0x0800, 0x8500, 0xa100}}},
|
|
{{{0xf300, 0xf300, 0xf200}}},
|
|
{{{0xc800, 0xc800, 0xc800}}},
|
|
{{{0xa000, 0xa000, 0xa000}}},
|
|
{{{0x7a00, 0x7a00, 0x7900}}},
|
|
{{{0x5500, 0x5500, 0x5500}}},
|
|
{{{0x3400, 0x3400, 0x3400}}},
|
|
}};
|
|
|
|
template <uint32_t X, uint32_t Y>
|
|
std::array<Coord, kColorCheckerSrgb.size()> FindClosest(const Image<X, Y>& image) {
|
|
std::array<Coord, kColorCheckerSrgb.size()> closest;
|
|
std::array<uint32_t, kColorCheckerSrgb.size()> diff;
|
|
diff.fill(UINT32_MAX);
|
|
|
|
for (uint32_t y = 0; y < Y; ++y) {
|
|
const auto& row = image.at(y);
|
|
|
|
for (uint32_t x = 0; x < X; ++x) {
|
|
const auto& pixel = row.at(x);
|
|
|
|
for (uint32_t cc = 0; cc < kColorCheckerSrgb.size(); ++cc) {
|
|
auto pixel_diff = pixel.Difference(kColorCheckerSrgb.at(cc));
|
|
if (pixel_diff < diff.at(cc)) {
|
|
diff.at(cc) = pixel_diff;
|
|
closest.at(cc) = {x, y};
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return closest;
|
|
}
|
|
|
|
template <uint32_t X, uint32_t Y>
|
|
uint32_t ScoreImage(const Image<X, Y>& image) {
|
|
std::array<uint32_t, kColorCheckerSrgb.size()> diff;
|
|
diff.fill(UINT32_MAX);
|
|
|
|
for (uint32_t y = 0; y < Y; ++y) {
|
|
const auto& row = image.at(y);
|
|
|
|
for (uint32_t x = 0; x < X; ++x) {
|
|
const auto& pixel = row.at(x);
|
|
|
|
for (uint32_t cc = 0; cc < kColorCheckerSrgb.size(); ++cc) {
|
|
auto pixel_diff = pixel.Difference(kColorCheckerSrgb.at(cc));
|
|
if (pixel_diff < diff.at(cc)) {
|
|
diff.at(cc) = pixel_diff;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return std::accumulate(diff.begin(), diff.end(), UINT32_C(0));
|
|
}
|
|
|
|
template <uint32_t X, uint32_t Y>
|
|
std::unique_ptr<Image<X, Y>> HighlightClosest(const Image<X, Y>& image) {
|
|
auto out = std::make_unique<Image<X, Y>>(image);
|
|
|
|
auto closest = FindClosest(*out);
|
|
for (uint32_t cc = 0; cc < kColorCheckerSrgb.size(); ++cc) {
|
|
const auto& coord = closest.at(cc);
|
|
const auto& color = kColorCheckerSrgb.at(cc);
|
|
out->DrawSquare({std::max(5U, coord.x) - 5, std::max(5U, coord.y) - 5}, kBlack, 10);
|
|
out->DrawSquare({std::max(6U, coord.x) - 6, std::max(6U, coord.y) - 6}, color, 12);
|
|
out->DrawSquare({std::max(7U, coord.x) - 7, std::max(7U, coord.y) - 7}, color, 14);
|
|
out->DrawSquare({std::max(8U, coord.x) - 8, std::max(8U, coord.y) - 8}, color, 16);
|
|
out->DrawSquare({std::max(9U, coord.x) - 9, std::max(9U, coord.y) - 9}, kWhite, 18);
|
|
}
|
|
return out;
|
|
}
|
|
|
|
template <uint32_t P, uint32_t R, uint32_t G, uint32_t B, uint32_t X, uint32_t Y>
|
|
uint32_t OptimizeLut(const Image<X, Y>& image, Lut3d<R, G, B>* lut) {
|
|
uint32_t diff = 0;
|
|
|
|
for (uint32_t r = 0; r < R; ++r) {
|
|
auto& rect = lut->at(r);
|
|
|
|
for (uint32_t g = 0; g < G; ++g) {
|
|
auto& row = rect.at(g);
|
|
|
|
for (uint32_t b = 0; b < B; ++b) {
|
|
auto& color = row.at(b);
|
|
|
|
std::cout << "(" << r << ", " << g << ", " << b << ")" << std::endl;
|
|
|
|
for (uint32_t c = 0; c < color.size(); ++c) {
|
|
auto min = FindPossibleMinimum<uint32_t, uint32_t, 4>(
|
|
0, UINT16_MAX,
|
|
[&image, &lut, r, g, b, c](uint32_t val) {
|
|
auto test_lut = *lut;
|
|
test_lut[r][g][b].at(c) = val;
|
|
return ScoreImage(*test_lut.MapImage(image));
|
|
});
|
|
std::cout << "\tC" << c << ": " << color.at(c) << " -> " << min << std::endl;
|
|
diff += AbsDiff(color.at(c), min);
|
|
color.at(c) = min;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return diff;
|
|
}
|