Image Composite
Function Description
Image Composite refers to the synthesis of three single-band Image Data into an RGB image. Users can select the best band for synthesis according to their needs, so as to improve the Display Speed and accuracy of the image. Color synthesis is based on the principle of additive color synthesis, according to the Remote Sensing Imagery of the three specified bands, red, green and blue are given respectively to synthesize color images.
When different bands are synthesized, the Result image highlights different features. Take the 7 bands of TM image as an example to list the commonly used band combinations:
- 321 band: True color synthesis. Band 3, 2 and 1 are assigned with red, green and blue respectively to obtain a natural color synthesis image. The color of the image is consistent with the actual color of the source area or scene. It is suitable for shallow sea exploration and mapping, and is suitable for non-remote sensing application professionals.
- 432 bands: standard false color synthesis. Bands 4, 3 and 2 are respectively assigned with red, green and blue. Vegetation in the standard false color image is displayed in red, which can highlight the characteristics of vegetation. It is often used to extract vegetation information. It is the most commonly used band combination in the analysis of vegetation, crops, Land Use and wetlands.
- 453 band: the combination with the most abundant information. In the spectral images of 7 bands of TM data, the 5th band generally contains the most abundant information of ground objects. The synthetic images with bands 4, 5 and 3 endowed with red, green and blue respectively have obvious color contrast and rich layers, and the color display rules of various ground objects on the map are similar to those of conventional synthetic images. It is often used for visual interpretation and is also used to determine the boundaries of land and water bodies.
- 741 band: This band combination image has the advantage of being compatible with mid-infrared, near-infrared and visible Band Info, with rich colors, good sense of hierarchy, extremely rich geological information and surface environmental information, less interference information, high degree of geological interpretation, and clear display of various structural features (folds and fractures). The boundaries of different types of rock areas are clear.
Function entrance
- Data tab-> Data Processing-> Grid-> Image Composite.
- Toolbox-> Data Processing-> Grid-> Image Composite. (iDesktopX)
Operating instructions
- Red band: Set a Dataset of a band, load the data through the red channel, and render the Raster Data of the band with red as the primary color.
- Green band: Set a Dataset of a band, load the data through the green channel, and render the Raster Data of the band with green as the primary color.
- Blue band: Set a Dataset of a band, load the data through the blue channel, and render the Raster Data of the band with blue as the primary color.
- Set Result: select the Datasource where the Result Dataset is to be saved and the name of the resultant Result Dataset, which is consistent with the Datasource where the single-band Dataset is located by default.
After setting the above parameters, the composite color Image Data operation can be executed.
 |
| 453 band composite color image |
Related topics