{
  "date": "2026-10-27",
  "method": {
    "ko": "직접 그린 1200×800 그림(밝기가 거의 같은 빨간 꽃과 초록 잎, 하늘, 노랑, 피부색, 0~255 회색 11단계)을 사진 보정 저장과 같은 processImage 경로로 처리했습니다. 밝기는 Rec.709 가중치(0~255), 남은 색은 RGB 최댓값−최솟값의 평균, R−B는 빨강에서 파랑을 뺀 평균입니다.",
    "en": "A synthetic 1200×800 scene (a red flower and green leaves of almost equal brightness, sky, yellow, a skin tone and an 11-step grey wedge from 0 to 255) was processed through the same processImage path the Filters save uses. Brightness uses Rec.709 weights (0–255); remaining colour is the mean of RGB max−min; R−B is the mean of red minus blue.",
    "ja": "自作の1200×800の画像（明るさがほぼ同じ赤い花と緑の葉、空、黄、肌色、0〜255の灰色11段階）を、写真補正の保存と同じprocessImageの経路で処理しました。明るさはRec.709の重み（0〜255）、残った色はRGBの最大−最小の平均、R−Bは赤から青を引いた平均です。"
  },
  "table": {
    "ko": {
      "headers": [
        "설정",
        "꽃 / 잎 밝기",
        "남은 색 · R−B",
        "회색 단계 최대 변화"
      ],
      "rows": [
        [
          "원본(컬러)",
          "85 / 86",
          "82.3 · -29.0",
          "0"
        ],
        [
          "흑백 100",
          "85 / 86",
          "0.0 · +0.0",
          "0"
        ],
        [
          "흑백 50",
          "85 / 87",
          "41.3 · -14.5",
          "0"
        ],
        [
          "흑백 100 + 대비 +30",
          "84 / 84",
          "0.0 · +0.0",
          "4"
        ],
        [
          "흑백 100 + 빨강 밝기 −50",
          "45 / 86",
          "0.0 · +0.0",
          "0"
        ],
        [
          "흑백 100 + 빨강 밝기 +50",
          "164 / 86",
          "0.0 · +0.0",
          "0"
        ],
        [
          "흑백 100 + 초록 밝기 +50",
          "85 / 182",
          "0.0 · +0.0",
          "1"
        ],
        [
          "푸른 흑백",
          "85 / 86",
          "12.4 · -12.4",
          "2"
        ],
        [
          "세피아 100",
          "116 / 94",
          "52.1 · +52.1",
          "39"
        ],
        [
          "흑백 100 + 세피아 60",
          "96 / 98",
          "34.2 · +34.2",
          "26"
        ],
        [
          "오래된 사진",
          "89 / 92",
          "70.4 · -4.4",
          "15"
        ]
      ]
    },
    "en": {
      "headers": [
        "Setting",
        "Flower / leaf brightness",
        "Colour left · R−B",
        "Largest grey-step shift"
      ],
      "rows": [
        [
          "Original (colour)",
          "85 / 86",
          "82.3 · -29.0",
          "0"
        ],
        [
          "Black and white 100",
          "85 / 86",
          "0.0 · +0.0",
          "0"
        ],
        [
          "Black and white 50",
          "85 / 87",
          "41.3 · -14.5",
          "0"
        ],
        [
          "B&W 100 + Contrast +30",
          "84 / 84",
          "0.0 · +0.0",
          "4"
        ],
        [
          "B&W 100 + Red lightness −50",
          "45 / 86",
          "0.0 · +0.0",
          "0"
        ],
        [
          "B&W 100 + Red lightness +50",
          "164 / 86",
          "0.0 · +0.0",
          "0"
        ],
        [
          "B&W 100 + Green lightness +50",
          "85 / 182",
          "0.0 · +0.0",
          "1"
        ],
        [
          "Cool mono",
          "85 / 86",
          "12.4 · -12.4",
          "2"
        ],
        [
          "Sepia 100",
          "116 / 94",
          "52.1 · +52.1",
          "39"
        ],
        [
          "B&W 100 + Sepia 60",
          "96 / 98",
          "34.2 · +34.2",
          "26"
        ],
        [
          "Vintage",
          "89 / 92",
          "70.4 · -4.4",
          "15"
        ]
      ]
    },
    "ja": {
      "headers": [
        "設定",
        "花 / 葉の明るさ",
        "残った色 · R−B",
        "灰色の段階の最大の変化"
      ],
      "rows": [
        [
          "元の写真（カラー）",
          "85 / 86",
          "82.3 · -29.0",
          "0"
        ],
        [
          "白黒 100",
          "85 / 86",
          "0.0 · +0.0",
          "0"
        ],
        [
          "白黒 50",
          "85 / 87",
          "41.3 · -14.5",
          "0"
        ],
        [
          "白黒 100 + コントラスト +30",
          "84 / 84",
          "0.0 · +0.0",
          "4"
        ],
        [
          "白黒 100 + 赤の明るさ −50",
          "45 / 86",
          "0.0 · +0.0",
          "0"
        ],
        [
          "白黒 100 + 赤の明るさ +50",
          "164 / 86",
          "0.0 · +0.0",
          "0"
        ],
        [
          "白黒 100 + 緑の明るさ +50",
          "85 / 182",
          "0.0 · +0.0",
          "1"
        ],
        [
          "青いモノクロ",
          "85 / 86",
          "12.4 · -12.4",
          "2"
        ],
        [
          "セピア 100",
          "116 / 94",
          "52.1 · +52.1",
          "39"
        ],
        [
          "白黒 100 + セピア 60",
          "96 / 98",
          "34.2 · +34.2",
          "26"
        ],
        [
          "レトロ",
          "89 / 92",
          "70.4 · -4.4",
          "15"
        ]
      ]
    }
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  "figures": [
    {
      "file": {
        "ko": "batch2-black-and-white-photo-comparison-ko.webp",
        "en": "batch2-black-and-white-photo-comparison-en.webp",
        "ja": "batch2-black-and-white-photo-comparison-ja.webp"
      },
      "width": 1200,
      "height": {
        "ko": 851,
        "en": 930,
        "ja": 851
      },
      "alt": {
        "ko": "실제 저장한 결과(표시용 축소). 흑백 100만 쓰면 꽃과 잎이 같은 회색이 되고, 색별 조정을 함께 쓰면 갈라집니다.",
        "en": "Actual saved results, downscaled for display. Black and white alone turns flower and leaves the same grey; the colour mixer pulls them apart.",
        "ja": "実際に保存した結果（表示用に縮小）。白黒だけでは花と葉が同じ灰色になり、色別の調整を合わせると分かれます。"
      },
      "caption": {
        "ko": "실제 저장한 결과(표시용 축소). 흑백 100만 쓰면 꽃과 잎이 같은 회색이 되고, 색별 조정을 함께 쓰면 갈라집니다.",
        "en": "Actual saved results, downscaled for display. Black and white alone turns flower and leaves the same grey; the colour mixer pulls them apart.",
        "ja": "実際に保存した結果（表示用に縮小）。白黒だけでは花と葉が同じ灰色になり、色別の調整を合わせると分かれます。"
      }
    },
    {
      "file": {
        "ko": "batch2-black-and-white-photo-steps-ko.webp",
        "en": "batch2-black-and-white-photo-steps-en.webp",
        "ja": "batch2-black-and-white-photo-steps-ja.webp"
      },
      "width": 1200,
      "height": {
        "ko": 1800,
        "en": 1800,
        "ja": 1800
      },
      "alt": {
        "ko": "사진 보정과 필터: 효과의 흑백을 100으로 올린 상태(위)와, 이어서 색별 조정 (8색)에서 바꿀 색을 빨강으로 고르고 고른 색의 밝기를 −50으로 내린 상태(아래)입니다.",
        "en": "Photo adjustments and filters: Effects › Black and white at 100 (top), then Color mixer › Red, Selected color lightness −50 (bottom).",
        "ja": "写真補正とフィルター：効果の白黒を100にした状態（上）と、続けて色別の調整で赤の「選んだ色の明るさ」を−50にした状態（下）です。"
      },
      "caption": {
        "ko": "사진 보정과 필터: 효과의 흑백을 100으로 올린 상태(위)와, 이어서 색별 조정 (8색)에서 바꿀 색을 빨강으로 고르고 고른 색의 밝기를 −50으로 내린 상태(아래)입니다.",
        "en": "Photo adjustments and filters: Effects › Black and white at 100 (top), then Color mixer › Red, Selected color lightness −50 (bottom).",
        "ja": "写真補正とフィルター：効果の白黒を100にした状態（上）と、続けて色別の調整で赤の「選んだ色の明るさ」を−50にした状態（下）です。"
      }
    }
  ]
}