#include <vector>
#include <limits> // std::numeric_limits
#include "igs_color_rgb_hls.h"
#include "igs_math_random.h"
#include "igs_ifx_common.h" // igs::image::rgba
namespace
{
/*------ バッファをまとめて確保(return or throwで自動解放) ------*/
class noise_reference_
{
public:
noise_reference_(
const int ww, const int hh, const double hue_range, const double lig_range, const double sat_range, const double alp_range, const unsigned long random_seed, const double near_blur, const int camera_x, const int camera_y, const int camera_w, const int camera_h) : w_(ww), h_(hh), nblur_(near_blur)
{
if (0 == ww) {
return;
}
if (0 == hh) {
return;
}
/* 枚数ゼロ(rangeが全部ゼロ)なのでノイズかけない */
if ((0.0 == hue_range) && (0.0 == lig_range) && (0.0 == sat_range) && (0.0 == alp_range)) {
return;
}
/* memory確保 */
const int sz = ww * hh;
if (0.0 != hue_range) {
this->hue_array_.resize(sz);
}
if (0.0 != lig_range) {
this->lig_array_.resize(sz);
}
if (0.0 != sat_range) {
this->sat_array_.resize(sz);
}
if (0.0 != alp_range) {
this->alp_array_.resize(sz);
}
/* タネを設定 */
igs::math::random hue_rand, lig_rand, sat_rand, alp_rand;
unsigned long step = 0;
if (0.0 != hue_range) {
hue_rand.seed(random_seed + step++);
}
if (0.0 != lig_range) {
lig_rand.seed(random_seed + step++);
}
if (0.0 != sat_range) {
sat_rand.seed(random_seed + step++);
}
if (0.0 != alp_range) {
alp_rand.seed(random_seed + step++);
}
igs::math::random hue_rand_ext, lig_rand_ext, sat_rand_ext, alp_rand_ext;
if (0.0 != hue_range) {
hue_rand_ext.seed(random_seed + step++);
}
if (0.0 != lig_range) {
lig_rand_ext.seed(random_seed + step++);
}
if (0.0 != sat_range) {
sat_rand_ext.seed(random_seed + step++);
}
if (0.0 != alp_range) {
alp_rand_ext.seed(random_seed + step++);
}
/* ノイズを書く */
/* -???_range/2〜???_range/2 */
const int x1 = camera_x;
const int y1 = camera_y;
const int x2 = camera_x + camera_w - 1;
const int y2 = camera_y + camera_h - 1;
/* マージンあるかないかでノイズパターンが変わってしまうため、
near_blur用に広げてはいけない */
//if (0.0 != near_blur) { x1-=1; x2+=1; y1-=1; y2+=1; }
if (0.0 != hue_range) {
int pos = 0;
for (int yy = 0; yy < hh; ++yy) {
for (int xx = 0; xx < ww; ++xx, ++pos) {
if ((xx < x1) || (x2 < xx) || (yy < y1) || (y2 < yy)) {
/* 計算用マージンがあったらそこは別のパターン */
this->hue_array_[pos] = hue_range * (hue_rand_ext.next_d() - 0.5);
} else {
/* 計算用マージン幅が変化してもその中のノイズパターンは
変わらないようにマージン内は別計算 */
this->hue_array_[pos] = hue_range * (hue_rand.next_d() - 0.5);
}
}
}
}
if (0.0 != lig_range) {
int pos = 0;
for (int yy = 0; yy < hh; ++yy) {
for (int xx = 0; xx < ww; ++xx, ++pos) {
if ((xx < x1) || (x2 < xx) || (yy < y1) || (y2 < yy)) {
this->lig_array_[pos] = lig_range * (lig_rand_ext.next_d() - 0.5);
} else {
this->lig_array_[pos] = lig_range * (lig_rand.next_d() - 0.5);
}
}
}
}
if (0.0 != sat_range) {
int pos = 0;
for (int yy = 0; yy < hh; ++yy) {
for (int xx = 0; xx < ww; ++xx, ++pos) {
if ((xx < x1) || (x2 < xx) || (yy < y1) || (y2 < yy)) {
this->sat_array_[pos] = sat_range * (sat_rand_ext.next_d() - 0.5);
} else {
this->sat_array_[pos] = sat_range * (sat_rand.next_d() - 0.5);
}
}
}
}
if (0.0 != alp_range) {
int pos = 0;
for (int yy = 0; yy < hh; ++yy) {
for (int xx = 0; xx < ww; ++xx, ++pos) {
if ((xx < x1) || (x2 < xx) || (yy < y1) || (y2 < yy)) {
this->alp_array_[pos] = alp_range * (alp_rand_ext.next_d() - 0.5);
} else {
this->alp_array_[pos] = alp_range * (alp_rand.next_d() - 0.5);
}
}
}
}
}
double hue_value(const int xx, const int yy)
{
return this->noise_value_(
this->hue_array_, this->w_, this->h_, xx, yy, this->nblur_);
}
double lig_value(const int xx, const int yy)
{
return this->noise_value_(
this->lig_array_, this->w_, this->h_, xx, yy, this->nblur_);
}
double sat_value(const int xx, const int yy)
{
return this->noise_value_(
this->sat_array_, this->w_, this->h_, xx, yy, this->nblur_);
}
double alp_value(const int xx, const int yy)
{
return this->noise_value_(
this->alp_array_, this->w_, this->h_, xx, yy, this->nblur_);
}
void clear()
{
this->alp_array_.clear();
this->sat_array_.clear();
this->lig_array_.clear();
this->hue_array_.clear();
}
~noise_reference_()
{
this->clear();
}
private:
const int w_;
const int h_;
const double nblur_;
std::vector<double> hue_array_;
std::vector<double> lig_array_;
std::vector<double> sat_array_;
std::vector<double> alp_array_;
void accum_in_(
const double *noise_array, const int ww, const int hh, const int xx, const int yy, double &accum_val, int &accum_count)
{
if ((0 <= xx) && (xx < ww) && (0 <= yy) && (yy < hh)) {
accum_val += noise_array[yy * ww + xx];
++accum_count;
}
}
double noise_value_(
const std::vector<double> &noise_vector, const int ww, const int hh, const int xx, const int yy, const double near_blur)
{
if (noise_vector.size() <= 0) {
return 0.0;
}
const double *noise_array = &noise_vector.at(0);
if (0.0 == near_blur) {
return noise_array[yy * ww + xx];
}
double accum_val = 0.0;
int accum_count = 0;
this->accum_in_(noise_array, ww, hh, xx - 1, yy - 1, accum_val, accum_count);
this->accum_in_(noise_array, ww, hh, xx, yy - 1, accum_val, accum_count);
this->accum_in_(noise_array, ww, hh, xx + 1, yy - 1, accum_val, accum_count);
this->accum_in_(noise_array, ww, hh, xx - 1, yy, accum_val, accum_count);
this->accum_in_(noise_array, ww, hh, xx + 1, yy, accum_val, accum_count);
this->accum_in_(noise_array, ww, hh, xx - 1, yy + 1, accum_val, accum_count);
this->accum_in_(noise_array, ww, hh, xx, yy + 1, accum_val, accum_count);
this->accum_in_(noise_array, ww, hh, xx + 1, yy + 1, accum_val, accum_count);
if (accum_count <= 0) {
return noise_array[yy * ww + xx];
}
accum_val /= static_cast<double>(accum_count);
/* 中心Pixelと廻り(1Pixel幅)の平均値とのバランスを返す */
return (near_blur * accum_val) +
((1.0 - near_blur) * noise_array[yy * ww + xx]);
/*
ノイズをなじませるために、
8近傍ピクセルと対象ピクセルとの重み付けをする処理
+-----+-----+-----+
| p00 | p01 | p02 |
+-----+-----+-----+
| p10 | p11 | p12 |
+-----+-----+-----+
| p20 | p21 | p22 |
+-----+-----+-----+
対象ピクセル = p11
8近傍ピクセル = p00,p01,p02,p10,p12,p20,p21,p22
重み付け = near_blur = nb = 0...1
注意：対象ピクセルが画像のエッジにあると、8近傍ピクセルには、
存在しないピクセルがあるのでそれは除いて計算する
p00+p01+p02+p10+p12+p20+p21+p22
------------------------------- x nb + p22 x (1 - nb)
8
nb
= (p00+p01+p02+p10+p12+p20+p21+p22) x -- + p22 x (1 - nb)
8
nb == 0のとき
--> 対象ピクセルの値
= p22
nb == 0.5のとき
--> 対象が半分、8近傍平均値が半分
= (p00+p01+p02+p10+p12+p20+p21+p22) / 16 + p22 / 2
nb == 0.888...(8/9)のとき
--> 対象と8近傍クセルの平均値
= (p00+p01+p02+p10+p12+p20+p21+p22) x 8 / 72 + p22 / 9
nb == 1のとき
--> 8近傍ピクセルのみの平均値
= (p00+p01+p02+p10+p12+p20+p21+p22) / 8
*/
}
/* copy constructorを無効化 */
noise_reference_(const noise_reference_ &);
/* 代入演算子を無効化 */
noise_reference_ &operator=(const noise_reference_ &);
};
/*------ 端値を適度に調整する ------*/
class control_term_within_limits_
{
public:
control_term_within_limits_(
const double effective_low /* = 0.0 */
,
const double effective_high /* = 0.0 */
,
const double center /* = 0.5 */
,
const int type /* = 0 */
,
const double noise_range /* = 0.0 */
) : effective_low_(effective_low), effective_high_(effective_high), center_(center), type_(static_cast<term_type_>(type)), noise_range_(noise_range)
{
}
void exec(
const double current_value /* 0...1 */
,
double &noise /* -noise_range/2...noise_range/2 */
,
double &shift_value)
{
if ((0.0 < this->effective_low_) && (current_value < this->center_)) {
const double cen = this->center_;
const double val = current_value;
const double ran = this->noise_range_;
const double eff = this->effective_low_;
switch (this->type_) {
case shift_all_:
shift_value = ((cen - val) / cen) * (ran / 2.0) * eff;
break;
case shift_term_:
if (val < ran) {
shift_value = (((cen < ran) ? cen : ran) - val) / 2.0 * eff;
}
break;
case decrease_all_: {
const double tmp = (cen - val) / cen * eff;
if (0.0 < tmp) {
noise *= 1.0 - tmp;
}
} break;
case decrease_term_:
if (val < (ran / 2.0)) {
const double stop = (cen < (ran / 2.0)) ? cen : ran / 2.0;
const double tmp = (stop - val) / stop * eff;
if (0.0 < tmp) {
noise *= 1.0 - tmp;
}
}
break;
}
}
if ((0.0 < this->effective_high_) && (this->center_ < current_value)) {
const double cen = this->center_;
const double val = current_value;
const double ran = this->noise_range_;
const double eff = this->effective_high_;
switch (this->type_) {
case shift_all_:
shift_value = ((cen - val) / (1.0 - cen)) * (ran / 2.0) * eff;
break;
case shift_term_:
if ((1.0 - ran) < val) {
const double ira = 1.0 - ran;
shift_value = (((cen < ira) ? ira : cen) - val) / 2.0 * eff;
}
break;
case decrease_all_: {
const double tmp = (val - cen) / (1.0 - cen) * eff;
if (0.0 < tmp) {
noise *= 1.0 - tmp;
}
} break;
case decrease_term_:
if ((1.0 - (ran / 2.0)) < val) {
const double rpos = 1.0 - (ran / 2.0);
const double stop = (cen < rpos) ? rpos : cen;
const double tmp = (val - stop) / (1.0 - stop) * eff;
if (0.0 < tmp) {
noise *= 1.0 - tmp;
}
}
break;
}
}
}
double noise_range(void) const { return this->noise_range_; }
private:
/* low,high両方ゼロ =exec()内処理せず =端値はカット =default */
const double effective_low_;
const double effective_high_;
const double center_;
enum term_type_ { /* 端値の調整方法 */
shift_all_ = 0, /* 0.全体的にノイズ位置がずれる */
shift_term_, /* 1.端のみでノイズ位置がずれる */
decrease_all_, /* 2.全体的にノイズ幅が減る */
decrease_term_, /* 3.端のみでノイズ幅が減る */
};
const term_type_ type_;
const double noise_range_;
/* copy constructorを無効化 */
control_term_within_limits_(const control_term_within_limits_ &);
/* 代入演算子を無効化 */
control_term_within_limits_ &operator=(const control_term_within_limits_ &);
};
/*------ RGB値にノイズをのせる ------*/
void pixel_rgb_(
const double red_in, const double gre_in, const double blu_in, const double alp_in, const double hue_noise, const double lig_noise, const double sat_noise, control_term_within_limits_ &lig_term, control_term_within_limits_ &sat_term, double &red_out, double &gre_out, double &blu_out)
{
if (0.0 == alp_in) {
red_out = red_in;
gre_out = gre_in;
blu_out = blu_in;
return;
}
double hue, lig, sat;
igs::color::rgb_to_hls(red_in, gre_in, blu_in, hue, lig, sat);
if (0.0 != hue_noise) {
hue += 360.0 * hue_noise * alp_in;
while (hue < 0.0) {
hue += 360.0;
}
while (360.0 <= hue) {
hue -= 360.0;
}
}
if (0.0 != lig_term.noise_range()) {
double shift_value = 0;
double lignoise = lig_noise;
lig_term.exec(lig, lignoise, shift_value);
lig += shift_value * alp_in;
lig += lignoise * alp_in;
if (lig < 0.0) {
lig = 0.0;
} else if (1.0 < lig) {
lig = 1.0;
}
}
if (0.0 != sat_term.noise_range()) {
double shift_value = 0;
double satnoise = sat_noise;
sat_term.exec(sat, satnoise, shift_value);
sat += shift_value * alp_in;
sat += satnoise * alp_in;
if (sat < 0.0) {
sat = 0.0;
} else if (1.0 < sat) {
sat = 1.0;
}
// if( 0.0 == sat ) hue = -1.0; // hls_to_rgb(-)
}
igs::color::hls_to_rgb(hue, lig, sat, red_out, gre_out, blu_out);
}
/*------ Alpha値にノイズをのせる ------*/
void pixel_a_(
const double alp_in, const double alp_noise, control_term_within_limits_ &alp_term, double &alp_out)
{
// if (0.0 == alp_in) { return; }
double alpin = alp_in;
if (0.0 != alp_term.noise_range()) {
double shift_value = 0.0;
double alpnoise = alp_noise;
alp_term.exec(alpin, alpnoise, shift_value);
const double mask = alpin;
alpin += shift_value * mask;
alpin += alpnoise * mask;
if (alpin < 0.0) {
alpin = 0.0;
} else if (1.0 < alpin) {
alpin = 1.0;
}
}
alp_out = alpin;
}
/*------ raster画像にノイズをのせるtemplate ------*/
template <class IT, class RT>
void change_template_(
IT *image_array, const int width, const int height, const int channels
,
const RT *ref /* 求める画像(out)と同じ高さ、幅、チャンネル数 */
,
const int ref_mode /* 0=R,1=G,2=B,3=A,4=Luminance,5=Nothing */
,
noise_reference_ &noise, const double hue_range, control_term_within_limits_ &lig_term, control_term_within_limits_ &sat_term, control_term_within_limits_ &alp_term
,
const bool add_blend_sw)
{
const int t_max = std::numeric_limits<IT>::max();
const double div_val = static_cast<double>(t_max);
const double mul_val = static_cast<double>(t_max) + 0.999999;
const int r_max = std::numeric_limits<RT>::max();
if (igs::image::rgba::siz == channels) {
using namespace igs::image::rgba;
for (int yy = 0; yy < height; ++yy) {
for (int xx = 0; xx < width; ++xx, image_array += channels) {
/* 変化量初期値 */
double refv = 1.0;
/* 参照画像あればピクセル単位の画像変化量を得る */
if (ref != 0) {
refv *= igs::color::ref_value(
ref, channels, r_max, ref_mode);
ref += channels; /* continue;の前に行うこと */
}
/* 加算合成で、Alpha値ゼロならRGB値を計算する必要はない */
if (add_blend_sw && (0 == image_array[alp])) {
continue;
}
/* 加算合成でなくAlpha合成の時は、
Alpha値がゼロでもRGB値は存在する(してもよい) */
/* マスクSWがON、なら変化をMask */
if (add_blend_sw && (image_array[alp] < t_max)) {
refv *= static_cast<double>(image_array[alp]) / div_val;
}
if (
((0.0 != hue_range) || (0.0 != lig_term.noise_range()) || (0.0 != sat_term.noise_range())) /* ノイズがhlsのどれか一つはある */
) {
double rr1 = static_cast<double>(image_array[red]) / div_val, gg1 = static_cast<double>(image_array[gre]) / div_val, bb1 = static_cast<double>(image_array[blu]) / div_val, aa1 = static_cast<double>(image_array[alp]) / div_val;
double rr2 = 0, gg2 = 0, bb2 = 0;
pixel_rgb_(
rr1, gg1, bb1, aa1, noise.hue_value(xx, yy), noise.lig_value(xx, yy), noise.sat_value(xx, yy), lig_term, sat_term, rr2, gg2, bb2);
if (refv != 1.0) {
rr2 = (rr2 - rr1) * refv + rr1;
gg2 = (gg2 - gg1) * refv + gg1;
bb2 = (bb2 - bb1) * refv + bb1;
}
image_array[red] = static_cast<IT>(rr2 * mul_val);
image_array[gre] = static_cast<IT>(gg2 * mul_val);
image_array[blu] = static_cast<IT>(bb2 * mul_val);
}
if (0.0 != alp_term.noise_range()) {
double aa1 = static_cast<double>(image_array[alp]) / div_val;
double aa2 = 0;
pixel_a_(aa1, noise.alp_value(xx, yy), alp_term, aa2);
if (refv != 1.0) {
aa2 = (aa2 - aa1) * refv + aa1;
}
image_array[alp] = static_cast<IT>(aa2 * mul_val);
}
}
}
} else if (igs::image::rgb::siz == channels) {
using namespace igs::image::rgb;
if (
((0.0 != hue_range) || (0.0 != lig_term.noise_range()) || (0.0 != sat_term.noise_range())) /* ノイズがhlsのどれか一つはある */
) {
for (int yy = 0; yy < height; ++yy) {
for (int xx = 0; xx < width; ++xx, image_array += channels) {
/* 変化量初期値 */
double refv = 1.0;
/* 参照画像あればピクセル単位の画像変化量を得る */
if (ref != 0) {
refv *= igs::color::ref_value(
ref, channels, r_max, ref_mode);
ref += channels; /* continue;の前に行うこと */
}
double rr1 = static_cast<double>(image_array[red]) / div_val, gg1 = static_cast<double>(image_array[gre]) / div_val, bb1 = static_cast<double>(image_array[blu]) / div_val;
double rr2 = 0, gg2 = 0, bb2 = 0;
pixel_rgb_(
rr1, gg1, bb1, 1.0, noise.hue_value(xx, yy), noise.lig_value(xx, yy), noise.sat_value(xx, yy), lig_term, sat_term, rr2, gg2, bb2);
if (refv != 1.0) {
rr2 = (rr2 - rr1) * refv + rr1;
gg2 = (gg2 - gg1) * refv + gg1;
bb2 = (bb2 - bb1) * refv + bb1;
}
image_array[red] = static_cast<IT>(rr2 * mul_val);
image_array[gre] = static_cast<IT>(gg2 * mul_val);
image_array[blu] = static_cast<IT>(bb2 * mul_val);
}
}
}
} else if (1 == channels) { /* grayscale */
if (0.0 != lig_term.noise_range()) {
for (int yy = 0; yy < height; ++yy) {
for (int xx = 0; xx < width; ++xx, ++image_array) {
/* 変化量初期値 */
double refv = 1.0;
/* 参照画像あればピクセル単位の画像変化量を得る */
if (ref != 0) {
refv *= igs::color::ref_value(
ref, channels, r_max, ref_mode);
ref += channels; /* continue;の前に行うこと */
}
double li1 = static_cast<double>(image_array[0]) / div_val;
double shift_value = 0;
double lig_noise = noise.lig_value(xx, yy);
lig_term.exec(li1, lig_noise, shift_value);
double li2 = li1;
li2 += shift_value;
li2 += lig_noise;
li2 = (li2 < 0.0) ? 0.0 : ((1.0 < li2) ? 1.0 : li2);
if (refv != 1.0) {
li2 = li1 + (li2 - li1) * refv;
}
image_array[0] = static_cast<IT>(li2 * mul_val);
}
}
}
}
}
}
//--------------------------------------------------------------------
#include <stdexcept> // std::domain_error
#include "igs_hls_noise.h"
void igs::hls_noise::change(
unsigned char *image_array
,
const int height, const int width, const int channels, const int bits
,
const unsigned char *ref /* 求める画像と同じ高、幅、channels数 */
,
const int ref_bits /* refがゼロのときはここもゼロ */
,
const int ref_mode /* 0=R,1=G,2=B,3=A,4=Luminance,5=Nothing */
/* image_arrayに余白が変化してもノイズパターンが変わらない
ようにするためにカメラエリアを指定する */
,
const int camera_x, const int camera_y, const int camera_w, const int camera_h
,
const double hue_range, const double lig_range, const double sat_range, const double alp_range, const unsigned long random_seed, const double near_blur
,
const double lig_effective, const double lig_center, const int lig_type, const double sat_effective, const double sat_center, const int sat_type, const double alp_effective, const double alp_center, const int alp_type
,
const bool add_blend_sw)
{
if ((0.0 == hue_range) && (0.0 == lig_range) && (0.0 == sat_range) && (0.0 == alp_range)) {
return;
}
if ((igs::image::rgba::siz != channels) && (igs::image::rgb::siz != channels) && (1 != channels) /* grayscale */
) {
throw std::domain_error("Bad channels,Not rgba/rgb/grayscale");
}
/* ノイズ参照画像を作成する */
noise_reference_ noise(
width, height, hue_range, lig_range, sat_range, alp_range, random_seed, near_blur, camera_x, camera_y, camera_w, camera_h);
/* 端値を適度に調整する設定 */
control_term_within_limits_ lig_term(
lig_effective, lig_effective, lig_center, lig_type, lig_range);
control_term_within_limits_ sat_term(
sat_effective, sat_effective, sat_center, sat_type, sat_range);
control_term_within_limits_ alp_term(
alp_effective, alp_effective, alp_center, alp_type, alp_range);
/* rgb(a)画像にhls(a)でドットノイズを加える */
if ((std::numeric_limits<unsigned char>::digits == bits) && ((std::numeric_limits<unsigned char>::digits == ref_bits) || (0 == ref_bits))) {
change_template_(
image_array, width, height, channels, ref, ref_mode, noise, hue_range, lig_term, sat_term, alp_term, add_blend_sw);
noise.clear(); /* ノイズ画像メモリ解放 */
} else if ((std::numeric_limits<unsigned short>::digits == bits) && ((std::numeric_limits<unsigned char>::digits == ref_bits) || (0 == ref_bits))) {
change_template_(
reinterpret_cast<unsigned short *>(image_array), width, height, channels, ref, ref_mode, noise, hue_range, lig_term, sat_term, alp_term, add_blend_sw);
noise.clear(); /* ノイズ画像メモリ解放 */
} else if ((std::numeric_limits<unsigned short>::digits == bits) && (std::numeric_limits<unsigned short>::digits == ref_bits)) {
change_template_(
reinterpret_cast<unsigned short *>(image_array), width, height, channels, reinterpret_cast<const unsigned short *>(ref), ref_mode, noise, hue_range, lig_term, sat_term, alp_term, add_blend_sw);
noise.clear(); /* ノイズ画像メモリ解放 */
} else if ((std::numeric_limits<unsigned char>::digits == bits) && (std::numeric_limits<unsigned short>::digits == ref_bits)) {
change_template_(
image_array, width, height, channels, reinterpret_cast<const unsigned short *>(ref), ref_mode, noise, hue_range, lig_term, sat_term, alp_term, add_blend_sw);
noise.clear(); /* ノイズ画像メモリ解放 */
} else {
throw std::domain_error("Bad bits,Not uchar/ushort");
}
}