Pixel binarization device and method

摘要

The present invention relates to an image processing apparatus, and more particularly, to a device and method capable of binarizing pixels by removing an isolated point. The pixel binarization method contemplates the steps of: establishing a local window of pixels including a central pixel and a plurality of neighboring pixels; analyzing the neighboring pixels within the local window and detecting a minimum brightness value and a maximum brightness value exhibited by the neighboring pixels; comparing a brightness value exhibited by the central pixel with the minimum brightness value; and determining the central pixel to be an isolated point and outputting the central pixel as a white pixel when the brightness value exhibited by the central pixel is less than the minimum brightness value.