Image processing apparatus, and non-transitory computer readable medium storing program setting a threshold value as a reference of a previously stored ground color and removing the ground color

摘要

In an image processing apparatus, a ground color detecting unit is provided that detects ground color information indicating a ground color from input first image data. A storage unit stores a history of the ground color information detected by the ground color detecting unit, and a setting unit is also provided that sets a first threshold value that is a reference of the ground color based on a representative value of first ground color information indicating a first ground color included in the history stored in the storage unit. A ground color removing unit removes a ground color for input second image data based on the first threshold value which was set by the setting unit. A non-transitory computer readable medium storing a program is also provided, the program causing a processor to perform steps similar to those performed by the image forming apparatus.

主权项

1. An image processing apparatus comprising:
a ground color detecting unit that detects ground color information indicating a ground color from input first image data; a storage control unit that causes a storage unit to store a history of the ground color information detected by the ground color detecting unit; a setting unit that sets a first threshold value that is a reference of the ground color on the basis of a representative value of first ground color information indicating a first ground color included in the history stored in the storage unit; and a ground color removing unit that performs a ground color removal process for input second image data on the basis of the first threshold value set by the setting unit; wherein the storage unit includes a first storage unit that stores the first ground color information among the ground color information detected by the ground color detecting unit, and a second storage unit that stores second ground color information indicating a second ground color different from the first ground color, and wherein the setting unit sets the first threshold value on the basis of the representative value of the first ground color information stored in the first storage unit, the image processing apparatus further comprising: an updating unit that updates, when a detection frequency of the second ground color information reaches a second threshold value in the history, the first ground color information stored in the first storage unit by storing the second ground color information instead of the first ground color information in the first storage unit.