"gamma correction" meaning in English

{
  "etymology_text": "From the use of the Greek letter gamma in the mathematical notation.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "gamma correction (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
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          "source": "w"
        },
        {
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          "name": "Terms with German translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Computer graphics",
          "orig": "en:Computer graphics",
          "parents": [
            "Computing",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A nonlinear operation used to encode and decode luminance or tristimulus values in video or still image systems."
      ],
      "id": "en-gamma_correction-en-noun-~zGNrxTV",
      "links": [
        [
          "computer graphics",
          "computer graphics"
        ],
        [
          "nonlinear",
          "nonlinear"
        ],
        [
          "operation",
          "operation"
        ],
        [
          "encode",
          "encode"
        ],
        [
          "decode",
          "decode"
        ],
        [
          "luminance",
          "luminance"
        ],
        [
          "tristimulus",
          "tristimulus"
        ],
        [
          "video",
          "video"
        ]
      ],
      "raw_glosses": [
        "(computer graphics) A nonlinear operation used to encode and decode luminance or tristimulus values in video or still image systems."
      ],
      "synonyms": [
        {
          "word": "gamma"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "computer-graphics",
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "translations": [
        {
          "code": "de",
          "lang": "German",
          "sense": "computer graphics",
          "tags": [
            "feminine"
          ],
          "word": "Gammakorrektur"
        }
      ],
      "wikipedia": [
        "gamma correction"
      ]
    }
  ],
  "word": "gamma correction"
}

{
  "etymology_text": "From the use of the Greek letter gamma in the mathematical notation.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "gamma correction (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English uncountable nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with German translations",
        "en:Computer graphics"
      ],
      "glosses": [
        "A nonlinear operation used to encode and decode luminance or tristimulus values in video or still image systems."
      ],
      "links": [
        [
          "computer graphics",
          "computer graphics"
        ],
        [
          "nonlinear",
          "nonlinear"
        ],
        [
          "operation",
          "operation"
        ],
        [
          "encode",
          "encode"
        ],
        [
          "decode",
          "decode"
        ],
        [
          "luminance",
          "luminance"
        ],
        [
          "tristimulus",
          "tristimulus"
        ],
        [
          "video",
          "video"
        ]
      ],
      "raw_glosses": [
        "(computer graphics) A nonlinear operation used to encode and decode luminance or tristimulus values in video or still image systems."
      ],
      "synonyms": [
        {
          "word": "gamma"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "computer-graphics",
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "wikipedia": [
        "gamma correction"
      ]
    }
  ],
  "translations": [
    {
      "code": "de",
      "lang": "German",
      "sense": "computer graphics",
      "tags": [
        "feminine"
      ],
      "word": "Gammakorrektur"
    }
  ],
  "word": "gamma correction"
}