liz/rawTherapee
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

locallab: dedup dehaze code

Browse Source
This commit is contained in:
heckflosse
2019-04-08 14:44:02 +02:00
parent d2f7db7182
commit 7970afa400
7 changed files with 28 additions and 143 deletions
Download Patch File Download Diff File Expand all files Collapse all files

129
rtengine/ipdehaze.cc
View File

@@ -209,9 +209,9 @@ void extract_channels(Imagefloat *img, array2D<float> &r, array2D<float> &g, arr
} // namespace
void ImProcFunctions::dehaze(Imagefloat *img)
void ImProcFunctions::dehaze(Imagefloat *img, const DehazeParams &dehazeParams)
{
if (!params->dehaze.enabled) {
if (!dehazeParams.enabled) {
return;
}
@@ -219,7 +219,7 @@ void ImProcFunctions::dehaze(Imagefloat *img)
const int W = img->getWidth();
const int H = img->getHeight();
const float strength = LIM01(float(params->dehaze.strength) / 100.f * 0.9f);
const float strength = LIM01(float(dehazeParams.strength) / 100.f * 0.9f);
if (options.rtSettings.verbose) {
std::cout << "dehaze: strength = " << strength << std::endl;
@@ -288,7 +288,7 @@ void ImProcFunctions::dehaze(Imagefloat *img)
std::cout << "dehaze: max distance is " << max_t << std::endl;
}
float depth = -float(params->dehaze.depth) / 100.f;
float depth = -float(dehazeParams.depth) / 100.f;
const float t0 = max(1e-3f, std::exp(depth * max_t));
const float teps = 1e-3f;
#ifdef _OPENMP
@@ -308,7 +308,7 @@ void ImProcFunctions::dehaze(Imagefloat *img)
}
}
float mt = max(t[y][x], t0, tl + teps, tu + teps);
if (params->dehaze.showDepthMap) {
if (dehazeParams.showDepthMap) {
img->r(y, x) = img->g(y, x) = img->b(y, x) = LIM01(1.f - mt);
} else {
float r = (rgb[0] - ambient[0]) / mt + ambient[0];
@@ -325,123 +325,4 @@ void ImProcFunctions::dehaze(Imagefloat *img)
img->normalizeFloatTo65535();
}
void ImProcFunctions::dehazeloc(Imagefloat *img, float deha, float depth)
{
img->normalizeFloatTo1();
const int W = img->getWidth();
const int H = img->getHeight();
float strength = deha;//LIM01(float(params->locallab.dehaze) / 100.f * 0.9f);
if (options.rtSettings.verbose) {
std::cout << "dehaze: strength = " << strength << std::endl;
}
array2D<float> dark(W, H);
int patchsize = max(int(5 / scale), 2);
int npatches = 0;
float ambient[3];
array2D<float> &t_tilde = dark;
float max_t = 0.f;
{
array2D<float> R(W, H);
array2D<float> G(W, H);
array2D<float> B(W, H);
extract_channels(img, R, G, B, patchsize, 1e-1, multiThread);
patchsize = max(max(W, H) / 600, 2);
npatches = get_dark_channel(R, G, B, dark, patchsize, nullptr, false, multiThread);
DEBUG_DUMP(dark);
max_t = estimate_ambient_light(R, G, B, dark, patchsize, npatches, ambient);
if (options.rtSettings.verbose) {
std::cout << "dehaze: ambient light is "
<< ambient[0] << ", " << ambient[1] << ", " << ambient[2]
<< std::endl;
}
get_dark_channel(R, G, B, dark, patchsize, ambient, true, multiThread);
}
if (min(ambient[0], ambient[1], ambient[2]) < 0.01f) {
if (options.rtSettings.verbose) {
std::cout << "dehaze: no haze detected" << std::endl;
}
img->normalizeFloatTo65535();
return; // probably no haze at all
}
DEBUG_DUMP(t_tilde);
#ifdef _OPENMP
#pragma omp parallel for if (multiThread)
#endif
for (int y = 0; y < H; ++y) {
for (int x = 0; x < W; ++x) {
dark[y][x] = 1.f - strength * dark[y][x];
}
}
const int radius = patchsize * 4;
const float epsilon = 1e-5;
array2D<float> &t = t_tilde;
{
array2D<float> guideB(W, H, img->b.ptrs, ARRAY2D_BYREFERENCE);
guidedFilter(guideB, t_tilde, t, radius, epsilon, multiThread);
}
DEBUG_DUMP(t);
if (options.rtSettings.verbose) {
std::cout << "dehaze: max distance is " << max_t << std::endl;
}
float dept = depth;
if (options.rtSettings.verbose) {
std::cout << "dehaze: depth = " << dept << std::endl;
}
const float t0 = max(1e-3f, std::exp(dept * max_t));
const float teps = 1e-3f;
#ifdef _OPENMP
#pragma omp parallel for if (multiThread)
#endif
for (int y = 0; y < H; ++y) {
for (int x = 0; x < W; ++x) {
// ensure that the transmission is such that to avoid clipping...
float rgb[3] = { img->r(y, x), img->g(y, x), img->b(y, x) };
// ... t >= tl to avoid negative values
float tl = 1.f - min(rgb[0]/ambient[0], rgb[1]/ambient[1], rgb[2]/ambient[2]);
// ... t >= tu to avoid values > 1
float tu = t0 - teps;
for (int c = 0; c < 3; ++c) {
if (ambient[c] < 1) {
tu = max(tu, (rgb[c] - ambient[c])/(1.f - ambient[c]));
}
}
float mt = max(t[y][x], t0, tl + teps, tu + teps);
if (params->dehaze.showDepthMap) {
img->r(y, x) = img->g(y, x) = img->b(y, x) = 1.f - mt;
} else {
float r = (rgb[0] - ambient[0]) / mt + ambient[0];
float g = (rgb[1] - ambient[1]) / mt + ambient[1];
float b = (rgb[2] - ambient[2]) / mt + ambient[2];
img->r(y, x) = r;
img->g(y, x) = g;
img->b(y, x) = b;
}
}
}
img->normalizeFloatTo65535();
}
} // namespace rtengine