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#include <stdexcept> /* std::domain_error  */</stdexcept>
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#include <limits>    /* std::numeric_limits */</limits>
Toshihiro Shimizu 890ddd
#include "igs_color_rgb_hsv.h"
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namespace {
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void pixel_rgba_(const double red_in, const double gre_in, const double blu_in,
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                 const double alp_in, const double hue_noise  // -0.5...0.5
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                 ,
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                 const double sat_noise, const double val_noise  // -0.5...0.5
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                 ,
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                 const double alp_noise, double &red_out, double &gre_out,
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                 double &blu_out, double &alp_out) {
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  double hue, sat, val, alp;
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  igs::color::rgb_to_hsv(red_in, gre_in, blu_in, hue, sat, val);
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  alp = alp_in;
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  if (0.0 != hue_noise) {
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    hue += 360.0 * hue_noise;
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    while (hue < 0.0) {
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      hue += 360.0;
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    }
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    while (360.0 <= hue) {
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      hue -= 360.0;
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    }
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  }
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  if (0.0 != sat_noise) {
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    sat += sat_noise;
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    if (sat < 0.0) {
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      sat = 0.0;
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    } else if (1.0 < sat) {
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      sat = 1.0;
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    }
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  }
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  if (0.0 != val_noise) {
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    val += val_noise;
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    if (val < 0.0) {
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      val = 0.0;
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    } else if (1.0 < val) {
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      val = 1.0;
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    }
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  }
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  if (0.0 != alp_noise) {
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    alp += alp_noise;
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    alp = (alp < 0.0) ? 0.0 : ((1.0 < alp) ? 1.0 : alp);
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  }
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  igs::color::hsv_to_rgb(hue, sat, val, red_out, gre_out, blu_out);
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  alp_out = alp;
Toshihiro Shimizu 890ddd
}
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}
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//------------------------------------------------------------
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namespace {
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class noise_ref_ {
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public:
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  noise_ref_(const unsigned char *array, const int height, const int width,
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             const int channels, const int bits, const int xoffset,
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             const int yoffset, const int zz);
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  double noise(int xx  // 0...width-1...
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               ,
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               int yy    // 0...height-1...
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               ) const;  // return range is 0...1
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private:
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  const unsigned char *array_;
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  const int height_;
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  const int width_;
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  const int channels_;
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  const int bits_;
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  const double bmax_;
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  const int xoffset_;
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  const int yoffset_;
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  const int zz_;
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  /* copy constructorを無効化 */
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  noise_ref_(const noise_ref_ &);
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  /* 代入演算子を無効化 */
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  noise_ref_ &operator=(const noise_ref_ &);
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};
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noise_ref_::noise_ref_(const unsigned char *array, const int height,
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                       const int width, const int channels, const int bits,
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                       const int xoffset, const int yoffset, const int zz)
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    : array_(array)
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    , height_(height)
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    , width_(width)
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    , channels_(channels)
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    , bits_(bits)
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    , bmax_(static_cast<double>((1 << bits) - 1))</double>
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    , xoffset_(xoffset)
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    , yoffset_(yoffset)
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    , zz_(zz) {
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  if (0 == array) {
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    throw std::domain_error("noise_ref_  no data");
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  }
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  if ((zz < 0) || (channels <= zz)) {
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    throw std::domain_error("noise_ref_  bad zz");
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  }
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  if ((std::numeric_limits<unsigned char="">::digits != this->bits_) &&</unsigned>
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      (std::numeric_limits<unsigned short="">::digits != this->bits_)) {</unsigned>
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    throw std::domain_error("noise_ref_  bad bits");
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  }
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}
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double noise_ref_::noise(int xx, int yy) const {
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  xx -= this->xoffset_;
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  yy -= this->yoffset_;
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  while (xx < 0) {
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    xx += this->width_;
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  }
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  while (this->width_ <= xx) {
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    xx -= this->width_;
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  }
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  while (yy < 0) {
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    yy += this->height_;
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  }
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  while (this->height_ <= yy) {
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    yy -= this->height_;
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  }
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  if (std::numeric_limits<unsigned char="">::digits == this->bits_) {</unsigned>
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    return (*(this->array_ + this->channels_ * this->width_ * yy +
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              this->channels_ * xx + this->zz_)) /
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           this->bmax_;
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  }
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  return (*(reinterpret_cast<const *="" short="" unsigned="">(this->array_) +</const>
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            this->channels_ * this->width_ * yy + this->channels_ * xx +
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            this->zz_)) /
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         this->bmax_;
Toshihiro Shimizu 890ddd
}
Toshihiro Shimizu 890ddd
}
Toshihiro Shimizu 890ddd
//------------------------------------------------------------
Toshihiro Shimizu 890ddd
#include "igs_ifx_common.h" /* igs::image::rgba */
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#include "igs_hsv_add.h"
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namespace {
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/* raster画像にノイズをのせるtemplate */
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template <class class="" it,="" rt=""></class>
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void change_template_(
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    IT *image_array, const int height, const int width, const int channels
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    ,
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    const noise_ref_ &noi
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    ,
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    const RT *ref /* 求める画像(out)と同じ高さ、幅、チャンネル数 */
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    ,
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    const int ref_mode /* 0=R,1=G,2=B,3=A,4=Luminance,5=Nothing */
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    ,
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    const double offset, const double hue_scale, const double sat_scale,
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    const double val_scale, const double alp_scale
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    ,
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    const bool add_blend_sw) {
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  const int t_max      = std::numeric_limits<it>::max();</it>
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  const double div_val = static_cast<double>(t_max);</double>
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  const double mul_val = static_cast<double>(t_max) + 0.999999;</double>
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  const int r_max      = std::numeric_limits<rt>::max();</rt>
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  if (igs::image::rgba::siz == channels) {
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    using namespace igs::image::rgba;
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    for (int yy = 0; yy < height; ++yy) {
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      for (int xx = 0; xx < width; ++xx, image_array += channels) {
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        /* 変化量初期値 */
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        double refv = 1.0;
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        /* 参照画像あればピクセル単位の画像変化量を得る */
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        if (ref != 0) {
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          refv *= igs::color::ref_value(ref, channels, r_max, ref_mode);
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          ref += channels; /* continue;の前に行うこと */
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        }
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        /* 加算合成で、Alpha値ゼロならRGB値を計算する必要はない */
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        if (add_blend_sw && (0 == image_array[alp])) {
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          continue;
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        }
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        /* 加算合成でなくAlpha合成の時は、
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Alpha値がゼロでもRGB値は存在する(してもよい) */
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        /* HSVAそれぞれに対するオフセット済ノイズ値 */
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        refv *= (noi.noise(xx, yy) - offset);
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        /* マスクSWがON、なら変化をMask */
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        if (add_blend_sw && (image_array[alp] < t_max)) {
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          refv *= static_cast<double>(image_array[alp]) / div_val;</double>
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        }
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        /* RGBAにHSVAノイズを加える */
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        double rr, gg, bb, aa;
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        pixel_rgba_(static_cast<double>(image_array[red]) / div_val,</double>
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                    static_cast<double>(image_array[gre]) / div_val,</double>
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                    static_cast<double>(image_array[blu]) / div_val,</double>
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                    static_cast<double>(image_array[alp]) / div_val,</double>
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                    refv * hue_scale, refv * sat_scale, refv * val_scale,
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                    refv * alp_scale, rr, gg, bb, aa);
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        /* 変化後の値を戻す */
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        image_array[red] = static_cast<it>(rr * mul_val);</it>
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        image_array[gre] = static_cast<it>(gg * mul_val);</it>
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        image_array[blu] = static_cast<it>(bb * mul_val);</it>
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        image_array[alp] = static_cast<it>(aa * mul_val);</it>
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      }
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    }
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  } else if (igs::image::rgb::siz == channels) {
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    using namespace igs::image::rgb;
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    for (int yy = 0; yy < height; ++yy) {
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      for (int xx = 0; xx < width; ++xx, image_array += channels) {
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        /* 変化量初期値 */
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        double refv = 1.0;
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        /* 参照画像あればピクセル単位の画像変化量を得る */
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        if (ref != 0) {
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          refv *= igs::color::ref_value(ref, channels, r_max, ref_mode);
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          ref += channels; /* continue;の前に行うこと */
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        }
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        /* HSVそれぞれに対するオフセット済ノイズ値 */
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        refv *= (noi.noise(xx, yy) - offset);
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        /* RGBにHSVノイズを加える */
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        double rr, gg, bb, aa;
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        pixel_rgba_(static_cast<double>(image_array[red]) / div_val,</double>
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                    static_cast<double>(image_array[gre]) / div_val,</double>
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                    static_cast<double>(image_array[blu]) / div_val, 1.0,</double>
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                    refv * hue_scale, refv * sat_scale, refv * val_scale, 0.0,
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                    rr, gg, bb, aa);
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        /* 変化後の値を戻す */
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        image_array[red] = static_cast<it>(rr * mul_val);</it>
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        image_array[gre] = static_cast<it>(gg * mul_val);</it>
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        image_array[blu] = static_cast<it>(bb * mul_val);</it>
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      }
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    }
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  } else if (1 == channels) { /* grayscale */
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    for (int yy = 0; yy < height; ++yy) {
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      for (int xx = 0; xx < width; ++xx, ++image_array) {
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        /* 変化量初期値 */
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        double refv = 1.0;
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        /* 参照画像あればピクセル単位の画像変化量を得る */
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        if (ref != 0) {
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          refv *= igs::color::ref_value(ref, channels, r_max, ref_mode);
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          ref += channels; /* continue;の前に行うこと */
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        }
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        /* Lに対するオフセット済ノイズ値 */
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        refv *= (noi.noise(xx, yy) - offset);
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        /* 変化なしなら次へ */
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        if (0.0 == refv * val_scale) {
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          continue;
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        }
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        /* GrayscaleにLノイズを加える */
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        double val =
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            static_cast<double>(image_array[0]) / div_val + refv * val_scale;</double>
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        val = (val < 0.0) ? 0.0 : ((1.0 < val) ? 1.0 : val);
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        /* 変化後の値を戻す */
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        image_array[0] = static_cast<it>(val * mul_val);</it>
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      }
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    }
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  }
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}
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}
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Toshihiro Shimizu 890ddd
void igs::hsv_add::change(
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    unsigned char *image_array, const int height, const int width,
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    const int channels, const int bits
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    ,
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    const unsigned char *noi_image_array, const int noi_height,
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    const int noi_width, const int noi_channels, const int noi_bits
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    ,
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    const unsigned char *ref /* 求める画像と同じ高、幅、channels数 */
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    ,
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    const int ref_bits /* refがゼロのときはここもゼロ */
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    ,
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    const int ref_mode /* 0=R,1=G,2=B,3=A,4=Luminance,5=Nothing */
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    ,
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    const int xoffset, const int yoffset, const int from_rgba,
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    const double offset, const double hue_scale, const double sat_scale,
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    const double val_scale, const double alp_scale
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    ,
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    const bool add_blend_sw) {
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  if ((0.0 == hue_scale) && (0.0 == sat_scale) && (0.0 == val_scale) &&
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      (0.0 == alp_scale)) {
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    return;
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  }
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  if ((igs::image::rgba::siz != channels) &&
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      (igs::image::rgb::siz != channels) && (1 != channels) /* grayscale */
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      ) {
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    throw std::domain_error("Bad channels,Not rgba/rgb/grayscale");
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  }
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  /* ノイズ参照画像を作成する */
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  noise_ref_ noi(noi_image_array
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                 ,
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                 noi_height, noi_width, noi_channels, noi_bits
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                 ,
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                 xoffset, yoffset, from_rgba);
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  /* rgb(a)画像にhsv(a)でドットノイズを加える */
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  if ((std::numeric_limits<unsigned char="">::digits == bits) &&</unsigned>
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      ((std::numeric_limits<unsigned char="">::digits == ref_bits) ||</unsigned>
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       (0 == ref_bits))) {
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    change_template_(image_array, height, width, channels, noi, ref, ref_mode,
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                     offset, hue_scale, sat_scale, val_scale, alp_scale,
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                     add_blend_sw);
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  } else if ((std::numeric_limits<unsigned short="">::digits == bits) &&</unsigned>
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             ((std::numeric_limits<unsigned char="">::digits == ref_bits) ||</unsigned>
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              (0 == ref_bits))) {
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    change_template_(reinterpret_cast<unsigned *="" short="">(image_array), height,</unsigned>
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                     width, channels, noi, ref, ref_mode, offset, hue_scale,
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                     sat_scale, val_scale, alp_scale, add_blend_sw);
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  } else if ((std::numeric_limits<unsigned short="">::digits == bits) &&</unsigned>
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             (std::numeric_limits<unsigned short="">::digits == ref_bits)) {</unsigned>
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    change_template_(
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        reinterpret_cast<unsigned *="" short="">(image_array), height, width,</unsigned>
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        channels, noi, reinterpret_cast<const *="" short="" unsigned="">(ref), ref_mode,</const>
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        offset, hue_scale, sat_scale, val_scale, alp_scale, add_blend_sw);
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  } else if ((std::numeric_limits<unsigned char="">::digits == bits) &&</unsigned>
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             (std::numeric_limits<unsigned short="">::digits == ref_bits)) {</unsigned>
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    change_template_(image_array, height, width, channels, noi,
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                     reinterpret_cast<const *="" short="" unsigned="">(ref), ref_mode,</const>
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                     offset, hue_scale, sat_scale, val_scale, alp_scale,
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                     add_blend_sw);
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  } else {
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    throw std::domain_error("Bad bits,Not uchar/ushort");
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  }
Toshihiro Shimizu 890ddd
}