CodePudding user response:
I understand what you said literally pixel 4 in 1, four pixels by choice, is to calculate into a point, will become a 2 k 4 k picture, pixel lost 75%, picture details loss of 75%,CodePudding user response:
4 k compressed into 2 mp, is through some visual algorithm, JPEG, JPEG2000, etc., upon by these images are compressed into 2 mp algorithm will be 2 k, when we see the video, you need to 2 mp reduction through algorithm into 4 k, visual basic feel change, 4 in 1 is washed-up, lost 75% is change don't come back,