IGI ParCAM 10.2: The Precision Engine for Aerial Photogrammetry
IGI ParCAM 10.2 is a specialized, high-precision software application focused on the core mathematical process of aerial triangulation (AT) and bundle block adjustment for aerial and UAV-based photogrammetric projects. It serves as a critical processing step for surveyors, mapping professionals, and service providers who need to establish accurate exterior orientation parameters (position and attitude) for every photograph in a project, forming the essential georeferenced foundation for creating orthomosaics, digital surface models (DSMs), and 3D point clouds.
Core Function: Mathematical Optimization of Image Geometry
The software’s primary role is to solve the complex bundle adjustment problem. It uses measured image coordinates of tie points and ground control points (GCPs) to compute the most statistically probable 3D positions of those points and the precise orientation (X, Y, Z, omega, phi, kappa) of each camera at the moment of exposure. This process corrects for errors and ensures the entire block of photos is adjusted into a consistent, accurate coordinate system.
Key Processing Workflows & Features:
1. Robust Aerial Triangulation (AT)
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Automatic Tie Point Measurement: Measures thousands of conjugate points across overlapping images to build a strong network of observations.
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Integrated GPS/IMU Processing: Can incorporate direct georeferencing data from airborne GPS and inertial measurement units (IMU) to strengthen the adjustment, especially in areas with limited ground control.
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Blunder Detection & Statistical Analysis: Identifies and removes gross measurement errors (blunders) and provides comprehensive statistical reports on the adjustment’s accuracy and reliability.
2. Input/Output & Integration
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Camera Calibration & Support: Manages detailed camera calibration data (focal length, principal point, lens distortion parameters) which is crucial for high accuracy.
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Export to Mapping Systems: Exports the final, adjusted exterior orientation parameters and calibrated imagery in standard formats for direct import into photogrammetric stereoplotters, DTMs, and orthophoto production software (like INPHO, Trimble Inpho, or Pix4D).
3. Project Management & Quality Control
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Handling Large Projects: Efficiently processes large blocks of imagery from traditional aerial surveys and modern UAV flights.
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Visualization Tools: Provides tools to visualize the flight lines, image centers, and the adjusted block.
