Patent ID: 8144255
Filing Date: 2012-03-27
Classification: G06K,H04N

Abstract:
1. A still subtitle detection apparatus configured to detect in pixel units or in a pixel unit a subtitle part included in an image in one video frame including a plurality of pixels, the apparatus comprising: a subtitle part determination module configured to determine within the one video frame, as the subtitle part, a pixel or a pixel group a still subtitle detection module configured to detect the subtitle part as a still subtitle by comparing two video frames and determining that the subtitle part remains unchanged in the two video frames, the two video frames being continuous along a time axis, wherein an input image signal including the subtitle part includes a previous frame and a current frame having a first frame rate; and a frame interpolation module configured to convert the input image signal into an output image signal having a second frame rate higher than the first frame rate, the frame interpolation module including wherein the subtitle part determination module includes a previous frame edge detection module configured to detect a luminance level change in a luminance level distribution of a group of pixels on a horizontal line in the video frame, and to input a previous frame edge detection result indicating the luminance level change to the previous frame edge neighboring peak region detection module, and a previous frame edge neighboring peak region detection module configured to detect in pixel units or in a pixel unit an edge of a character of the subtitle part in the previous frame from the previous frame edge detection result.