Patent ID: 7830551
Filing Date: 2010-11-09
Classification: H04N

Abstract:
1. An image processing method of correcting image data, the image data including bitmap data of an image, a drawing instruction and tone value information, the method comprising: reading the drawing instruction from the image data; determining whether the drawing instruction read from the image data is a drawing instruction to draw a line drawing over the image; extracting the tone value information from the image data in response to determining that the drawing instruction read from the image data is the drawing instruction to draw a line drawing over the image, wherein the tone value information specifies a tone value of the line drawing drawn in accordance with the drawing instruction; determining whether the tone value specified by the tone value information included in image data is equal to or greater than a predetermined tone value; and converting the tone value information into a description that specifies a tone value that is smaller than the tone value specified by the tone value information included in the image data if it is determined that the tone value specified by the tone value information included in the image data is not equal to or greater than the predetermined tone value.