Abstract: A method Abstract a histogram of HSV (Hue-Saturation-Value) colors from a color signal. The method includes receiving the color signal having a luminance component (Y) and chrominance components (CbCr). One section of a lookup table is selected according to the luminance component (Y) of the received color signal. The lookup table is divided into a plurality of sections each storing quantizing index values. Each section is divided by concentric circles corresponding to quantizing boundaries of the Saturation from a center, and divided by radial lines. Corresponding quantizing index values are selected according to the chrominance components (CbCr) of the received color signal in the selected section. The histogram index of the HSV colors is abstracted with reference to the selected section and the quantizing index values selected in the selected section.

Abstract: A scene change detector algorithm in image sequence is disclosed, in which a two-stage detecting process is applied to perceive a scene change in a precise and safe way. The algorithm includes classifying images into two different states, a transition state and a stationary state, after determining whether there is any change in adjacent frames, and confirming the scene change by rechecking whether there is the scene change in the classified frames.