Patent ID: 7907788
Filing Date: 2011-03-15
Classification: G06T

Abstract:
1. A resolution conversion method for converting a resolution of an input image, which is a binary image represented in a dot-matrix format, comprising: representing a density at a specific point, located at an arbitral position residing between pixels included in the input image, as an interpolation value of an adjacent pixel located adjacent to the specific point within the input image; allotting an output pixel area, which serves as a pixel area of each of output pixels to be included in an output image acquired after a resolution conversion processing is completed, to each of the output pixels in such a state that the input image and the output image are superimposed with each other so that four corners of the input image and those of the output image respectively correspond to each other; and determining binary data of each of the output pixels by comparing a normalized value that is acquired by normalizing a value derived by integrating the interpolation value with respect to an area of an input pixel, which is superimposed with the output pixel area, in reference to the output pixel area, wherein the determining binary data comprises determining a binary value of small when a density of a corresponding pixel of the output pixels is less than a predetermined threshold value and determining a binary value of large when the density of the corresponding pixel is greater than the predetermined threshold value; wherein an operation for integrating the interpolation value with respect to the area of the input pixel is implemented after: