Description
An RGB composite raster renderer.
Instances of this class represent an RGB composite stretch renderer that can help visualize raster data using AGSRasterLayer.
An RGB composite stretch renderer similar to AGSStretchRenderer but allows you to combine bands as red, green, blue composites. This renderer can be used for viewing color aerial photography, which is a three-band raster dataset, or to display different combinations of bands when working with multiband raster datasets, such as satellite or aerial imagery.
- Since
- 100
Instance Methods | |
| (instancetype) | - init |
| (instancetype) | - initWithStretchParameters:bandIndexes:gammas:estimateStatistics: |
| (instancetype) | - initWithStretchParameters:bandIndexes:gammas:estimateStatistics:pansharpenType:panchromaticRaster:weights: |
Class Methods | |
| (instancetype) | + baseStretchRenderer |
| (instancetype) | + rasterRenderer |
| (instancetype) | + RGBRendererWithStretchParameters:bandIndexes:gammas:estimateStatistics: |
| (instancetype) | + RGBRendererWithStretchParameters:bandIndexes:gammas:estimateStatistics:pansharpenType:panchromaticRaster:weights: |
Properties | |
| NSArray< NSNumber * > * | bandIndexes |
| BOOL | estimateStatistics |
| NSArray< NSNumber * > * | gammas |
| AGSRaster * | panchromaticRaster |
| AGSPansharpenType | pansharpenType |
| AGSStretchParameters * | stretchParameters |
| NSArray< NSNumber * > * | weights |
Method Documentation
◆ baseStretchRenderer
| + (instancetype) baseStretchRenderer |
- Deprecated:
- 100.9. Do not use this method, it creates an invalid and incomplete object.
◆ init
| - (instancetype) init |
◆ initWithStretchParameters:bandIndexes:gammas:estimateStatistics:
| - (instancetype) initWithStretchParameters: | (AGSStretchParameters *) | stretchParameters | |
| bandIndexes: | (NSArray< NSNumber * > *) | bandIndexes | |
| gammas: | (NSArray< NSNumber * > *) | gammas | |
| estimateStatistics: | (BOOL) | estimateStatistics | |
Initializes an RGB composite stretch renderer.
- Parameters
-
stretchParameters The stretch parameters to use. bandIndexes Specifying which bands to use as red, green, and blue. gammas An array of values in the range 0-2to apply gamma correction for each band in the raster dataset. Gamma refers to the degree of contrast between the midlevel gray values of a raster dataset. Gamma does not affect the black or white values in a raster dataset, only the middle values. By applying a gamma correction, you can control the overall brightness of a raster dataset. Additionally, gamma changes not only the brightness but also the ratios of red to green to blue. Values lower than1decrease the contrast in the darker areas and increase the contrast in the lighter areas. This darkens the image without saturating the dark or light areas of the image. This helps bring out details in lighter features, such as building tops. Conversely, gamma values greater than1increase the contrast in darker areas, such as shadows from buildings. Gamma values greater than one can also help bring out details in lower elevation areas when working with elevation data.estimateStatistics indicating whether statistics should be estimated for raster datasets that don't contain statistical information about their pixel values.
- Since
- 100
◆ initWithStretchParameters:bandIndexes:gammas:estimateStatistics:pansharpenType:panchromaticRaster:weights:
| - (instancetype) initWithStretchParameters: | (AGSStretchParameters *) | stretchParameters | |
| bandIndexes: | (NSArray< NSNumber * > *) | bandIndexes | |
| gammas: | (NSArray< NSNumber * > *) | gammas | |
| estimateStatistics: | (BOOL) | estimateStatistics | |
| pansharpenType: | (AGSPansharpenType) | pansharpenType | |
| panchromaticRaster: | (nullable AGSRaster *) | panchromaticRaster | |
| weights: | (nullable NSArray< NSNumber * > *) | weights | |
Initializes an RGB composite stretch renderer.
- Parameters
-
stretchParameters The stretch parameters to use. bandIndexes specifying which bands to use as red, green, and blue. gammas An array of values in the range 0-2to apply gamma correction for each band in the raster dataset. Gamma refers to the degree of contrast between the midlevel gray values of a raster dataset. Gamma does not affect the black or white values in a raster dataset, only the middle values. By applying a gamma correction, you can control the overall brightness of a raster dataset. Additionally, gamma changes not only the brightness but also the ratios of red to green to blue. Values lower than1decrease the contrast in the darker areas and increase the contrast in the lighter areas. This darkens the image without saturating the dark or light areas of the image. This helps bring out details in lighter features, such as building tops. Conversely, gamma values greater than1increase the contrast in darker areas, such as shadows from buildings. Gamma values greater than one can also help bring out details in lower elevation areas when working with elevation data.estimateStatistics Indicating whether statistics should be estimated for raster datasets that don't contain statistical information about their pixel values. pansharpenType Specifying the type of panchromatic sharpening method to apply. panchromaticRaster The high resolution raster used as the basis for pan-sharpening weights Weights used by the pan-sharpening method.
- Since
- 100
◆ rasterRenderer
| + (instancetype) rasterRenderer |
◆ RGBRendererWithStretchParameters:bandIndexes:gammas:estimateStatistics:
| + (instancetype) RGBRendererWithStretchParameters: | (AGSStretchParameters *) | stretchParameters | |
| bandIndexes: | (NSArray< NSNumber * > *) | bandIndexes | |
| gammas: | (NSArray< NSNumber * > *) | gammas | |
| estimateStatistics: | (BOOL) | estimateStatistics | |
Creates an RGB composite stretch renderer.
- Parameters
-
stretchParameters The stretch parameters to use. bandIndexes Specifying which bands to use as red, green, and blue. gammas An array of values in the range 0-2to apply gamma correction for each band in the raster dataset. Gamma refers to the degree of contrast between the midlevel gray values of a raster dataset. Gamma does not affect the black or white values in a raster dataset, only the middle values. By applying a gamma correction, you can control the overall brightness of a raster dataset. Additionally, gamma changes not only the brightness but also the ratios of red to green to blue. Values lower than1decrease the contrast in the darker areas and increase the contrast in the lighter areas. This darkens the image without saturating the dark or light areas of the image. This helps bring out details in lighter features, such as building tops. Conversely, gamma values greater than1increase the contrast in darker areas, such as shadows from buildings. Gamma values greater than one can also help bring out details in lower elevation areas when working with elevation data.estimateStatistics Indicating whether statistics should be estimated for raster datasets that don't contain statistical information about their pixel values.
- Returns
- A new RGB composite stretch renderer.
- Since
- 100
◆ RGBRendererWithStretchParameters:bandIndexes:gammas:estimateStatistics:pansharpenType:panchromaticRaster:weights:
| + (instancetype) RGBRendererWithStretchParameters: | (AGSStretchParameters *) | stretchParameters | |
| bandIndexes: | (NSArray< NSNumber * > *) | bandIndexes | |
| gammas: | (NSArray< NSNumber * > *) | gammas | |
| estimateStatistics: | (BOOL) | estimateStatistics | |
| pansharpenType: | (AGSPansharpenType) | pansharpenType | |
| panchromaticRaster: | (nullable AGSRaster *) | panchromaticRaster | |
| weights: | (nullable NSArray< NSNumber * > *) | weights | |
Creates an RGB composite stretch renderer.
- Parameters
-
stretchParameters The stretch parameters to use bandIndexes specifying which bands to use as red, green, and blue. gammas An array of values in the range 0-2to apply gamma correction for each band in the raster dataset. Gamma refers to the degree of contrast between the midlevel gray values of a raster dataset. Gamma does not affect the black or white values in a raster dataset, only the middle values. By applying a gamma correction, you can control the overall brightness of a raster dataset. Additionally, gamma changes not only the brightness but also the ratios of red to green to blue. Values lower than1decrease the contrast in the darker areas and increase the contrast in the lighter areas. This darkens the image without saturating the dark or light areas of the image. This helps bring out details in lighter features, such as building tops. Conversely, gamma values greater than1increase the contrast in darker areas, such as shadows from buildings. Gamma values greater than one can also help bring out details in lower elevation areas when working with elevation data.estimateStatistics Indicating whether statistics should be estimated for raster datasets that don't contain statistical information about their pixel values. pansharpenType Specifying the type of panchromatic sharpening method to apply. panchromaticRaster The high resolution raster used as the basis for pan-sharpening. weights Weights used by the pan-sharpening method.
- Returns
- A new RGB composite stretch renderer.
- Since
- 100
Property Documentation
◆ bandIndexes
|
readnonatomiccopy |
Indexes of bands of a multi-band raster dataset that the renderer is based on. The band specified by the 0th index is used as the red band, 1st index as the green band, and 2nd index as the blue band.
- Since
- 100
◆ estimateStatistics
|
readnonatomicassigninherited |
Indicates whether statistics should be estimated for the raster dataset. This is typically needed for datasets that do not have statistics.
- Since
- 100
◆ gammas
|
readnonatomiccopyinherited |
An array of values in the range 0-2 to apply gamma correction for each band in the raster dataset. Gamma refers to the degree of contrast between the midlevel gray values of a raster dataset. Gamma does not affect the black or white values in a raster dataset, only the middle values. By applying a gamma correction, you can control the overall brightness of a raster dataset. Additionally, gamma changes not only the brightness but also the ratios of red to green to blue. Values lower than 1 decrease the contrast in the darker areas and increase the contrast in the lighter areas. This darkens the image without saturating the dark or light areas of the image. This helps bring out details in lighter features, such as building tops. Conversely, gamma values greater than 1 increase the contrast in darker areas, such as shadows from buildings. Gamma values greater than one can also help bring out details in lower elevation areas when working with elevation data.
- Since
- 100
◆ panchromaticRaster
|
readnonatomicstrong |
The high-resolution panchromatic raster to use as a basis for panchoromatic sharpening.
Pan-sharpening uses a higher-resolution panchromatic image (or raster band) to fuse with a lower-resolution multiband raster dataset. The result produces a multiband raster dataset with the resolution of the panchromatic raster where the two rasters fully overlap.
- Since
- 100
◆ pansharpenType
|
readnonatomicassign |
The type of panchromatic sharpening method to apply.
- Since
- 100
◆ stretchParameters
|
readnonatomicstronginherited |
The stretch parameters used for the renderer.
- Since
- 100
◆ weights
|
readnonatomiccopy |
The weights to use in the panchormatic sharpening method.
Each of method uses different models to improve the spatial resolution while maintaining the color, and some are adjusted to include a weighting so that a fourth band can be included (such as the near-infrared band available in many multispectral image sources). By adding the weighting and enabling the infrared component, the visual quality in the output colors is improved.
- Since
- 100
