"Log" in camera stands for "logarithmic". It's a shooting profile or gamma curve that's found on some digital video cameras.
D log : Dji log
C log : Cannon log
S log : Sony log
■ logarithmic
relating to a logarithm (= a number that shows how many times a number has to be multiplied by itself to produce another number):
Decibels are measured on a logarithmic scale.
These variables were transformed using a logarithmic transformation.
Yields and returns had to be worked out by logarithmic tables, since there were no electronic calculators.
The Richter scale is logarithmic, not linear.
Logarithmic graph paper is calibrated so that a logarithmic graph appears as a straight line.
대수 단위, 혹은 로그 단위(Logarithmic units)는 로그 눈금을 사용하는 물리적, 수학적 단위를 의미한다. 즉 단위 척도가 로그 함수를 이용한 단위로 척도가 1씩 올라가면 통상 데이터 값이 10배와 같이 n배로 증가하는 형태를 띤다.
Explanation
Logarithmic footage, or Log, is a flat video image that contains more details of the scene.
It's not intended to be used without editing.
Logarithmic footage preserves more of the image's dynamic range and tonality.
It's often associated with better image quality.
Logarithmic footage is relatively desaturated, but minimal color grading is required to add the colors back in.
Logarithmic footage gives filmmakers greater control over the final look of their films.
Comparison to RAW
RAW video preserves all the camera sensor's information and passes it on untouched for post-production.
LOG video bakes more of an image's dynamic range and tonality into the video.