[Geotools-devel] [JIRA] (GEOT-5180) Improve Contrast Enhancement in SLD and CSS

Ian Turton (JIRA) Tue, 04 Aug 2015 04:32:14 -0700

Title: Message Title

Ian Turton created an issue

GEOT-5180

Issue Type:	Improvement
Affects Versions:	14-beta
Assignee:	Unassigned
Components:	api, main, render
Created:	04/Aug/15 1:29 PM
Priority:	Medium
Reporter:	Ian Turton

The goal is to add some standards remote sensing linear contrast enhancement methods to GeoTools and GeoServer (like this http://www.r-s-c-c.org/node/240) with the ability to control the parameters for the stretch which is not possible via the standard SLD:

We need to extend SLD parsing and processing to apply at least linear contrast stretch as per the following elements:

<ContrastEnhancement>
<Normalize>
<Algorithm>ClipToMinimumMaximum|StretchToMinimumMaximum|StretchAndClipToMinimumMaximum</Algorithm>
<Parameter name=”minValue”>1</Parameter>
<Parameter name=”maxValue”>1</Parameter>
</Normalize>
</ContrastEnhancement>

and

{ raster-channels: auto; raster-contrast-enhancement: normalize; raster-contrast-enhancement-algorithm: ClipToMinimumMaximum; raster-contrast-enhancement-parameter: min 20 max 30; raster-gamma : 0.5; raster-color-map: color-map-entry(#008000, 70) color-map-entry(#663333, 256); raster-gamma: 0.5; }

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[Geotools-devel] [JIRA] (GEOT-5180) Improve Contrast Enhancement in SLD and CSS

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