explain 4-D unit8

when i read the video ex- vid = read(obj); then in vid we get the 4-D uint8..then 4d means(h,w,b,f) is or not..

[Image Analyst]

I do not know what "then 4d means(h,w,b,f) is or not.." means. Please explain. With read() you can read a frame from a video, or the whole video, which would be a 4D array if you had a color video.

[asmi]

Is is a whole video not frame..

[Walter Roberson]

Each frame of a video is represented by a 3D array -- height, width, and color channel (R, G, B). You can store multiple frames in the same array by using the 4th dimension, making the array height, width, channel, frames

IM(13,5,2,14)

is frame 14, channel 2 (Green), pixel row 13, pixel column 5.

[asmi]

Thanx Walter Roberson..

Answer 1

[Walter Roberson]

Height, Width, Color Plane, Frame Number, where Color Plane is in the order Red, Green, Blue