A stretch renderer enhances the visual contrast of raster data in a RasterLayer. More...
| Header | #include <Stretch |
| Since | Esri |
| Inherits | Esri |
Public Functions
| Stretch | |
| Stretch | |
| virtual | ~ |
| Esri | color |
Detailed Description
A stretch renderer displays continuous raster cell values across a gradual ramp of colors. Use it to draw a single band of continuous data. The stretch renderer works well when you have a large range of values to display, such as in imagery, aerial photographs, or elevation models.
Stretching improves the appearance of the raster data by spreading its pixel values along a histogram whose minimum and maximum values are defined by the raster's bit depth. For example, an 8-bit raster dataset will be stretched along a histogram from 0 to 255.
Relevant samples:
- Apply map algebra: Apply map algebra to an elevation raster to floor, mask, and categorize the elevation values into discrete integer-based categories.
- Stretch renderer: Use a stretch renderer to enhance the visual contrast of raster data for analysis.
See also RasterRenderer.
Member Function Documentation
StretchRenderer::StretchRenderer (const Esri::ArcGISRuntime::StretchParameters &stretchParameters , const QList<double> &gammas, bool estimateStats , Esri::ArcGISRuntime::ColorRamp *colorRamp , QObject *parent = nullptr)
Creates a stretch renderer.
- stretchParameters - The stretch parameters handle.
- gammas - Gamma adjustment. A QList of double. Can be empty.
- estimateStats - Whether to estimate statistics if it does not exist.
- colorRamp - The color ramp object, can be
nullptr. - parent - The optional parent QObject.
StretchRenderer::StretchRenderer (const Esri::ArcGISRuntime::StretchParameters &stretchParameters , const QList<double> &gammas, bool estimateStats , Esri::ArcGISRuntime::PresetColorRampType presetColorRampType , QObject *parent = nullptr)
Creates a stretch renderer.
- stretchParameters - The stretch parameters handle.
- gammas - Gamma adjustment. A QList of double. Can be empty.
- estimateStats - Whether to estimate statistics if it does not exist.
- presetColorRampType - The type of color ramp.
- parent - The optional parent QObject.
[override virtual noexcept] StretchRenderer::~StretchRenderer ()
Destructor.
Esri::ArcGISRuntime::ColorRamp *StretchRenderer::colorRamp () const
The ColorRamp object used to create this StretchRenderer.