HARMLESS FRAME FILTER, HARMFUL IMAGE BLOCKING APPARATUS HAVING THE SAME, AND METHOD FOR FILTERING HARMLESS FRAMES

摘要

Disclosed herein are a harmless frame filter, a harmful image blocking apparatus having the filter, and a method for filtering harmless frames, which can rapidly identify clearly harmless images and exclude those harmless images in advance upon determining harmful image content including obscene images in real time, thus improving task efficiency. The harmless frame filter includes a primary filtering unit for extracting skin region candidate pixels from an input image, and primarily filtering harmless frames, based on a ratio of the skin region candidate pixels to the input image, and a secondary filtering unit for generating a Block Binary Pattern (BBP) histogram representing distribution characteristics of the skin region candidate pixels in a two-dimensional (2D) image space, and secondarily filtering harmless frames by comparing predefined learning data with the BBP histogram.