Image Color Balancing

Feature Description

Due to factors such as weather conditions, human factors, and sensor characteristics, acquired remote sensing imagery often exhibits inconsistencies in color and brightness. These issues not only lead to errors during image mosaicking but also result in noticeable color differences along the seam lines of the mosaic, severely affecting the visual quality and usability of the final image.

Image color balancing effectively reduces tonal differences between images by adjusting their color, brightness, and contrast. It achieves uniform tonality, moderate contrast, and distinct layering while preserving authentic feature colors, significantly enhancing overall image quality and visual consistency.

SuperMap ImageX Pro Supported since version 11i(2023).


Figure: Original Image	Figure: Color Balancing Template	Figure: Color Balance Result

Feature Entry

Imagery Tab->DOM Data Production Group->Image Color Balancing
DOM Automated Processing Flow/Ortho Data DOM Automated Processing Process Window->Image Color Balancing Node.

Parameter Description

Parameter Name	Description	Type
Data Type	Available only when launched from Imagery Tab->DOM Data Production Group->Image Color Balancing. Specifies the source of input image data with two options: Image Files and Mosaic Dataset. Default is Image Files.
Image Files	Available only when launched from Imagery Tab->DOM Data Production Group->Image Color Balancing. When Data Type is set to Image Files, directly input local path information to automatically acquire all images under the path.	File
Image Data Source	Available only when launched from Imagery Tab->DOM Data Production Group->True Color Output. When Data Type is set to Mosaic Dataset, specifies the datasource containing the image dataset.	Datasource
Image Data	When Data Type is set to Mosaic Dataset, specifies the image dataset. Display-only and non-editable in workflow production.	DatasetMosaic
Color Balancing Method	Provides two methods: Template-based Color Balancing and Adaptive Color Uniformity. Template-based Color Balancing: Adjusts the color features of target images based on template files. Adaptive Color Uniformity: A self-adaptive global-local combined color consistency processing method that requires no color balancing template.
Color Balancing Template	Available when Color Balancing Method is set to Template-based Color Balancing. Specifies local image files as templates to adjust color features of target images, ensuring color consistency with the template.	File
Color Balancing Method	Available when Color Balancing Method is set to Template-based Color Balancing. Default is Uniform Illumination and Color. Uniform Illumination and Color: Maps local image grayscale mean and variance to specified values, enhancing subtle grayscale information by equalizing contrast across the image. Color Mapping Uniform Color: Uses lower-resolution color balancing templates to map template colors onto target images, improving processing efficiency while maintaining quality.	ColorBalanceMethod
Block Size	Default is *10241024**. Smaller blocks yield better results but require longer processing time.	BlockSizeOption
Red Band Index	Sets red band, default is 0.	Integer
Green Band Index	Sets green band, default is 1.	Integer
Blue Band Index	Sets blue band, default is 2.	Integer
Brightness	Adjusts brightness of result image. Range: [-100,100], default: 0.0. Higher values increase brightness.	Double
Contrast	Adjusts contrast of result image. Range: [-100,100], default: 0.0. Higher values enhance contrast.	Double
Saturation	Adjusts saturation of result image. Range: [-100,100], default: 0.0. Higher values increase saturation.	Double
Mask Data Source	Specifies the datasource containing mask dataset.	DataSource
Dataset	Default is empty (mask disabled). When set, color balancing will avoid the dataset bounds.	DatasetVector
Color Balancing Preview	Default unchecked (no preview). When checked, process execution pauses and outputs preview based on Preview Resolution.	Boolean
Preview Resolution	Available when Color Balancing Preview is checked. Sets preview resolution, default: 4x Downsampling (1/4 of original resolution). Use Preview button to view results.	OrthoRatioDecreaseMethod
Export Directory	Sets storage path for result images. For DOM automated processing flow, uses Processing Path parameter from Set Image Path, non-editable. For Ortho data DOM process, uses Processing Path from Add Orthophoto, non-editable.	File
Resampling Method	Sets image resampling method: Nearest, Bilinear, Cubic. Default: Bilinear. See Resampling Method.	ResampleMethod
Result Minimum Value	Sets minimum pixel value for result image, default: 1.	Integer
Result Maximum Value	Sets maximum pixel value for result image, default: 255.	Integer
NoData Value	Sets pixel value for NoData areas, default: 0.0.	Double
Resolution Type	Specifies output image resolution method. Default: Original Resolution. Original Resolution: Retains input image resolution. Fixed Value: Uses specified fixed resolution. Custom: Outputs different resolutions based on satellite sensor types. Opens Custom Resolution: dialog for configuration. Notes: For unsupported sensor types, select USEDEFINE to apply its resolution. When processing multi-sensor data (e.g., ZY3, GF-2, LandSat), unconfigured sensors retain original resolution.	OrthoRatioType
Output Format	Sets result image format: Unspecified, Tiff/GeoTIFF, Erdas Image, PCIDSK. Default: Tiff/GeoTIFF (original format). For workflows, uses parameters from Set Image Path or Add Orthophoto, non-editable.	FileType
Compression Method	Sets compression method for TIFF/GeoTIFF output. Default: NONE. Uses parameters from workflow settings, non-editable.	CompressMethod
Output as Original Image Coordinate	When checked, uses input data's coordinate system. Otherwise follows workflow settings.	Boolean
Add Results to Map Window	Available only when launched from Imagery Tab->DOM Data Production Group->Image Color Balancing. Default checked (displays results in map window after successful execution).	Boolean
Create Image Pyramid	Default checked. Builds pyramids using specified resampling method to improve rendering performance.	Boolean
Resampling Method	Available when Create Image Pyramid is checked. Default: Average. See Resampling Method.	ResamplingMethod
Asynchronously Create Statistics	Default checked (creates statistics in background without delaying workflow). Unchecking creates statistics during tool execution (may take longer).	Boolean

Output

Outputs color-balanced images to local folders.
Automatically creates color-balanced mosaic dataset in OrthoData datasource.