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Histograms

Description

The histograms resource returns histograms of the image. This resource is supported if the hasHistograms property of the service is true.

Request parameters

ParameterDetails
variable

This parameter is added at 10.8.1 and is available if the image service uses ArcObjects11 or ArcObjectsRasterRendering as the service provider.

For an image service that has multidimensional information, this parameter can be used to request histograms for each variable. It will return histograms for the whole image service if not specified. Eligible variable names can be queried from the Multidimensional Info image service resource.

f

The response format. The default response format is html.

Values: html | json

Example usage

Example: Return histograms of an image service.

https://sampleserver6.arcgisonline.com/arcgis/rest/services/CharlotteLAS/ImageServer/histograms

JSON Response syntax

Note:

Refer to the Histogram object for the syntax of a histogram.

{
  "histograms": [
    <histogram1>,
    <histogram2>,
    <histogram3>,
    ...
  ]
}

JSON Response example

{
  "histograms": [
    {
      "size": 256, 
      "min": -0.5, 
      "max": 255.5, 
      "counts": [
        42915, 
        23218, 
        24832, 
        25925 
        36054, 
        57097, 
        61278, 
        65211
        ...
      ]
    },
    {
      "size": 256, 
      "min": -0.5, 
      "max": 255.5, 
      "counts": [
        42915, 
        23218, 
        24832, 
        25925 
        36054, 
        57097, 
        61278, 
        65211
        ...
      ]
    },
    {
      "size": 256, 
      "min": -0.5, 
      "max": 255.5, 
      "counts": [
        42915, 
        23218, 
        24832, 
        25925 
        36054, 
        57097, 
        61278, 
        65211
        ...
      ]
    }
  ] 
}