Feature Description
Filter image refers to the process of automatically filtering and selecting original images based on criteria such as image coverage, capture time, resolution, cloud cover percentage, and duplicate filenames. This process enables rapid extraction of high-quality images meeting specific requirements from massive datasets, effectively reducing redundant data. It not only enhances data processing efficiency but also ensures the accuracy and timeliness of analysis results, thereby satisfying diverse application scenarios including topographic mapping, resource surveys, environmental monitoring, and disaster assessment.
Filter image precisely eliminates unqualified data such as outdated images, low-resolution images, or those heavily obscured by clouds, ensuring subsequent analysis is based on high-quality data. This refined screening mechanism optimizes data processing workflows and enhances the overall efficiency of geographic information systems. Its role becomes particularly critical in application scenarios requiring rapid response and high-precision results.
SuperMap ImageX Pro 2025 version begins to support this feature.
Feature Entry
Imagery tab->Image Management group->Filter Image.
Steps
- Click Imagery tab->Image Management group->Filter Image button to open Filter Image panel and Image Preview window.
- In the filter image panel, configure filtering parameters including Image Path, Filter Criteria, and Trim Overlapping Images. Detailed explanations:
- Image Path: Specify the storage path for original images. The system automatically reads all image data under this path (including subfolders).
- Filter Criteria: Filter original images based on:
- Image Coverage: Three methods to define coverage area:
- Geographic Range: Construct coverage area using Left, Bottom, Right, Top GCS coordinates. Supports coordinate copy/paste for reuse.
- Range Data: Use specified dataset boundaries as coverage. Supported formats: UDBX/UDB, GeoJson, or ShapeFile.
- Standard View Frame Number: Input frame numbers under designated scale to automatically calculate coverage.
- Capture Time: Set temporal range. The system automatically reads time metadata and loads images within specified period.
- Resolution (m): Define resolution range. The system automatically reads resolution metadata and loads images within specified range.
- Cloud Cover(%): Set cloud coverage percentage range. The system automatically reads cloud cover metadata and loads images within specified range.
- Image Coverage: Three methods to define coverage area:
- Trim Overlapping Images: Further refine overlapping images after initial filtering:
- Eliminate Duplicate Names: Remove images with duplicate filenames.
- Primary Priority: Set first priority for trimming (options: Time, Resolution, or Same Orbit).
- Secondary Priority: Set second priority from remaining options (e.g., if primary is Time, choose between Resolution or Same Orbit).
- Tertiary Priority: Set final priority from remaining option (e.g., if primary is Time and secondary is Resolution, select Same Orbit).
Example: Enable Eliminate Duplicate Names, set priorities as Time (primary), Resolution (secondary), Same Orbit (tertiary). The system will first remove duplicates, then retain most recent images, followed by highest resolution images, and finally same-orbit images.
- Click Query to display filtered panchromatic and multispectral images in Search Result groups. Image bounds appear in Image Preview window. Use Visible toggle before each image to control its display.
- Verify filtering results in Filter Image window. Use tools in Search Result groups to add/remove images. Deleting panchromatic/multispectral image automatically removes its paired counterpart.
- After confirmation, click Export to output image list. Use Add List in Set Image Path and Set Image Path (DSM/DEM) to apply filtered results to production workflows.
Related Topics
DOM Production from Original Images
Environment Variable Configuration