Image processing apparatus and image processing method

Abstract

Provide an image processing apparatus and an image processing method which can generate an image having a high quality and a small data quantity. An image processing apparatus according to an embodiment includes a dividing unit which calculates a threshold value based on a pixel value distribution in image data, and divides pixels into two classes based on the calculated threshold value, a purification unit which prepares purified image data obtained by changing the pixel belonging to one class divided by the dividing unit into a specific color, and a pseudo-gradation binarization unit which binarizes the purified image data through a pseudo-gradation method.

Description

technical field [0001] Embodiments of the present invention relate to an image processing device and an image processing method. Background technique [0002] Conventionally, there is a technique of binarizing image data input using, for example, a scanner. Binarization is performed by, for example, a threshold method such as a fixed threshold method or a dynamic threshold method, or an analog gradation method such as a dithering method, an error diffusion method, or a density model method. [0003] However, in the above-mentioned binarization process, there is a problem that the image quality of the image data resulting from the processing and the space occupied by the data cannot be balanced. If the method is used, the image quality will deteriorate and affect the observation. [0004] Specifically, the image data binarized by the threshold method takes up less data space, and in many cases, the image data becomes unobservable due to the occurrence of white spots or the ...

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