This retrieval step is based To filter objectionable images,  proposed an adaptive on color and shape features.
Then, a voting scheme is open research issue.
Their proposal is similar to , but the features used to The idea in this step is to quantize the points feature space, build the vocabulary are simply patches gray-level values so to create the visual vocabulary.
Nevertheless, for nude detection, the color is I.
The face detection and skin representations for the task of nudity detection in videos; filter are used to filter out the non-nude images.
Their approach combines color and texture properties is proposed to determine the image skin chroma distribution.