디지털 영화제작에서 창조적 색 재현을 위한 룩업테이블(LUT) 기술 연구

A Technical Study of LUT for Creative Color Representation in the Digital Filmmaking

LUT has not been in the spotlight until recently. In the beginning of digital camera era on year 2000, the camera manufacturers based on analogue electronic signal process, users had no choice but to accept the whatever outcome it may delivers. But until the revolutionary camera called ‘Red One’ introduced in the world, it’s body was designed as a computer by itself, let users have freedom to control it as personal computer files and became massively popular among film makers. Eventually, the new electronic digital imaging process concepts like RAW, LOG and GAMMA are introduced to digital film makers and they must understand the technologies. In order to conceptualize the much broader dynamic range of image fields, one must understand the concept of LOG and shot images that conserves the true color information of original data of light called RAW. It is significant that camera manufacturers handed over the creative freedom of color representation process for making that ‘film-look’ to film makers. Therefore, the ‘film-look’ and most of visual decisions that used to be made at the shooting stage have transformed to the post production in DI(Digital Intermediate) process. Now, the film director could test all kinds of visual-look possibilities in the DI process. The active consumption of LUT technology would bring simplicity for directors and cinematographers whom are not only wanted the specific ‘film-look’ but to test the new infinite possibilities of ‘digital-look’. It is common to witness the preserving the original images in RAW data format at the film location and create true colors later in the DI post-production stage. During the process, it is necessary to use LUT creatively rather than making LUT as just preset filters.