Bloom Effect for Integrating CG Elements into Live-Action Footage

Abstract

　In this study, in order to improve the visual consistency of CG live-action composites, we investigated a method for representing the bloom effect based on a simple measured camera point spread function (PSF). First, the camera-specific edge spread function (ESF) was obtained from the edge images taken, and the PSF was estimated from the line spread function (LSF) obtained. After that, we added the bloom effect by convolution of the CG image and PSF and evaluated the image quality. As a result, the PSF-based blooms were found to be effective in improving the visual consistency of CG live-action compositing, because the pixel values of the PSF-based blooms were almost identical to those of the camera-captured live-action blooms.