- URL:https://<imageservice-url>/histograms
- Required Capability:Image
- Version Introduced:10.1
Description
The histograms resource returns histograms of the image. This resource is supported if the hasHistograms property of the service is true.
Request parameters
| Parameter | Details |
|---|---|
| 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. |
| renderingRule | Specifies the rendering rule for how the requested image should be rendered. In the context of accessing image service histograms resource, this parameter is used to retrieve histograms info in attached predefined raster function templates (inside a StatisticsHistogram function). |
| 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
Nota:
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
...
]
}
]
}