"Sobel operator" meaning in English

{
  "etymology_text": "Based on the work of Irwin Sobel.",
  "forms": [
    {
      "form": "Sobel operators",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Sobel operator (plural Sobel operators)",
      "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"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
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          "source": "w"
        },
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          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
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          "source": "w"
        }
      ],
      "glosses": [
        "A discrete differentiation operator that computes an approximation of the gradient of the image intensity function, used in image processing and computer vision, particular for detecting edges."
      ],
      "id": "en-Sobel_operator-en-noun-qBbb6WdZ",
      "links": [
        [
          "computer vision",
          "computer vision"
        ]
      ],
      "synonyms": [
        {
          "word": "Sobel-Feldman operator"
        },
        {
          "word": "Sobel filter"
        }
      ],
      "wikipedia": [
        "Sobel operator"
      ]
    }
  ],
  "word": "Sobel operator"
}

{
  "etymology_text": "Based on the work of Irwin Sobel.",
  "forms": [
    {
      "form": "Sobel operators",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Sobel operator (plural Sobel operators)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys"
      ],
      "glosses": [
        "A discrete differentiation operator that computes an approximation of the gradient of the image intensity function, used in image processing and computer vision, particular for detecting edges."
      ],
      "links": [
        [
          "computer vision",
          "computer vision"
        ]
      ],
      "synonyms": [
        {
          "word": "Sobel-Feldman operator"
        },
        {
          "word": "Sobel filter"
        }
      ],
      "wikipedia": [
        "Sobel operator"
      ]
    }
  ],
  "word": "Sobel operator"
}