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    "Warns": {
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    "Methods": {
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    },
    "Returns": {
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      "children": [
        {
          "__type": "Parameters",
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          "children": [
            {
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              "name": "out",
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                {
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                    {
                      "__type": "Text",
                      "__tag": 4046,
                      "value": "Sigmoid corrected output image."
                    }
                  ]
                }
              ]
            }
          ]
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    },
    "Summary": {
      "__type": "Section",
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      "children": [
        {
          "__type": "Paragraph",
          "__tag": 4045,
          "children": [
            {
              "__type": "Text",
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              "value": "Performs Sigmoid Correction on the input image."
            }
          ]
        }
      ],
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      "level": 0,
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    },
    "Receives": {
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    "Attributes": {
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    "Parameters": {
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          "__type": "Parameters",
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              "__type": "DocParam",
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              "name": "image",
              "annotation": "ndarray",
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                  "__type": "Paragraph",
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                  "children": [
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                      "value": "Input image."
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                  ]
                }
              ]
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            {
              "__type": "DocParam",
              "__tag": 4016,
              "name": "cutoff",
              "annotation": "float, optional",
              "desc": [
                {
                  "__type": "Paragraph",
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                    {
                      "__type": "Text",
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                      "value": "Cutoff of the sigmoid function that shifts the characteristic curve in horizontal direction. Default value is 0.5."
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                  ]
                }
              ]
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            {
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              "__tag": 4016,
              "name": "gain",
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                  "children": [
                    {
                      "__type": "Text",
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                      "value": "The constant multiplier in exponential's power of sigmoid function. Default value is 10."
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                }
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              "name": "inv",
              "annotation": "bool, optional",
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                  "children": [
                    {
                      "__type": "Text",
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                      "value": "If True, returns the negative sigmoid correction. Defaults to False."
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    },
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              "value": "Also known as Contrast Adjustment. This function transforms the input image pixelwise according to the equation "
            },
            {
              "__type": "InlineCode",
              "__tag": 4051,
              "value": "O = 1/(1 + exp*(gain*(cutoff - I)))"
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              "__type": "Text",
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              "value": " after scaling each pixel to the range 0 to 1."
            }
          ]
        }
      ],
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    },
    "Other Parameters": {
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    "Attributes",
    "Methods",
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    "Warnings"
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  "item_file": "/dev/scikit-image/src/skimage/exposure/exposure.py",
  "item_line": 735,
  "item_type": "function",
  "aliases": [
    "skimage.exposure.adjust_sigmoid"
  ],
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  },
  "see_also": [
    {
      "__type": "SeeAlsoItem",
      "__tag": 4028,
      "name": {
        "__type": "CrossRef",
        "__tag": 4002,
        "value": "adjust_gamma",
        "reference": {
          "__type": "LocalRef",
          "__tag": 4022,
          "kind": "module",
          "path": "skimage.exposure.exposure:adjust_gamma"
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  ],
  "signature": {
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    "__tag": 4029,
    "kind": "function",
    "parameters": [
      {
        "__type": "SigParam",
        "__tag": 4030,
        "name": "image",
        "annotation": {
          "__type": "Empty",
          "__tag": 4031
        },
        "kind": "POSITIONAL_OR_KEYWORD",
        "default": {
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        }
      },
      {
        "__type": "SigParam",
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        "name": "cutoff",
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        },
        "kind": "POSITIONAL_OR_KEYWORD",
        "default": "0.5"
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        "name": "gain",
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        "default": "False"
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    ],
    "return_annotation": {
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    },
    "target_name": "adjust_sigmoid"
  },
  "references": [
    ".. [1] Gustav J. Braun, \"Image Lightness Rescaling Using Sigmoidal Contrast",
    "       Enhancement Functions\",",
    "       http://markfairchild.org/PDFs/PAP07.pdf"
  ],
  "qa": "skimage.exposure.exposure:adjust_sigmoid",
  "arbitrary": [],
  "local_refs": [
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    "gain",
    "image",
    "inv",
    "out"
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}