MATLAB - Video Basics

Work in progess - TO add MORE

mov = aviread(movieFile, frameNo);

• The function aviread is used to extract a frame from the video, where movieFile is the path of the movie file and frameNo is the number of frame to be extracted.

[Img,Map] = frame2im(mov);

• The function frame2im is used to convert the frame into GRB image, where mov is the value returned by aviread and Img is the RGB image and Map is the color map.

aviinfo(mov);

• The properties of the movie file will be printed.

Common feature detectors and their classification:

Feature detector	Edge	Corner	Blob
Canny	X
Sobel	X
Harris & Stephens / Plessey	X	X
SUSAN	X	X
Shi & Tomasi		X
Level curve curvature		X
FAST		X
Laplacian of Gaussian		X	X
Difference of Gaussians		X	X
Determinant of Hessian		X	X
MSER			X
PCBR			X
Grey-level blobs			X

Standard	NTSC	PAL	SECAM
Property
images / second	29.97	25	25
ms / image	33.37	40.0	40.0
lines / image	525	625	625
(horiz./vert.) = aspect ratio	4:3	4:3	4:3
interlace	2:1	2:1	2:1
us / line	63.56	64.00	64.00