What does it mean to shoot RAW in the movie?

It can be understood that the RAW image is the original data that a CMOS or CCD image sensor converts the captured light source signal into a digital signal. RAW file is a file that records the original information of digital camera sensor and some metadata (such as ISO setting, shutter speed, aperture value, white balance, etc.). ) camera shooting production.

RAW is an unprocessed and compressed format, which can be conceptualized as "original image encoded data" or more vividly called "digital negative". The full name of RAW format is RAW? Image format, called primitive in programming.

Extended data:

Each pixel of traditional CCD can only be sensitive to one color, which is converted into different numbers according to the intensity of exposure. The digital range of different CCD is different, from the early 8bit to 10bit and 12bit. 8bit means that the sensitivity of a point is divided into 256 levels from the darkest to the brightest, 10bit means 1024 level, and so on.

Assuming that 3 million pixels each contain digital information of 10 bits, the uncompressed original file size is:

3000000 *10bit = 30000000 bit = 3750000 byte ≈ 3662.1k ≈ 3.58m. General cameras also compress raw files, which is a lossless compression algorithm similar to zip, and the files will be smaller.

Baidu encyclopedia -RAW format