为了在曲面屏幕上正确的显示图像，需要在投影前实时地对图像进行几何校正和边缘融合。
The image should be corrected by geometric calibration and edge-blending before projection in order to display image on the curved plane screen correctly.
对于如何在复杂显示表面，例如异型屏幕、大规模异型屏幕上面如何进行图像校正，相关的工作还比较少。
However, there is less method on how to solve the calibration on large complex screen. We summarize recent popular methods on the geometry calibration and photometric calibration.
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