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    This study introduces CompenNeSt++, an end-to-end system for full projector compensation, jointly addressing geometric and photometric distortions. It offers improved accuracy and practicality for projection systems.

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    Area of Science:

    • Computer Vision
    • Image Processing
    • Computer Graphics

    Background:

    • Traditional projector compensation methods often address geometric and photometric distortions separately, leading to suboptimal results.
    • Existing approaches may not effectively handle the complex interactions between projection surfaces and projected images.

    Purpose of the Study:

    • To propose the first end-to-end differentiable solution, CompenNeSt++, for jointly compensating geometric and photometric distortions in projector input images.
    • To develop novel subnets for geometric correction (WarpingNet) and photometric compensation (CompenNeSt).
    • To introduce a synthetic data-based pre-training strategy to enhance practicability and reduce training overhead.

    Main Methods:

    • CompenNeSt++ integrates WarpingNet (cascaded coarse-to-fine structure for grid learning) and CompenNeSt (siamese architecture for photometric interaction analysis).
    • The system is designed for end-to-end trainability, enabling joint optimization of both compensation types.
    • A novel synthetic data-based pre-training strategy is employed to minimize training data and time requirements.

    Main Results:

    • CompenNeSt++ demonstrates clear advantages over prior art in comprehensive experiments.
    • The proposed method achieves promising full projector compensation quality.
    • The synthetic data pre-training significantly reduces the number of required training images and overall training duration.

    Conclusions:

    • CompenNeSt++ offers an effective and practical solution for full projector compensation by jointly addressing geometric and photometric disturbances.
    • The developed WarpingNet and CompenNeSt subnets, along with the pre-training strategy, contribute to superior compensation performance.
    • The creation of a setup-independent benchmark facilitates future research in projector compensation.