Image processing apparatus and computer readable medium

An image processing apparatus comprising:

• a color region extracting section that is configured to extract a color region from a received image by extracting pixels of a low definition image which have saturation greater than or equal to a value greater than zero, the color region corresponding to a region marked as a to-be-masked region;
• a determination section that is configured to determine whether the color region is to be adopted as a concealing region for concealing a part of the received image, based on at least one of:
• i) a lightness of the color region extracted by the color region extracting section,
• ii) a lightness of a peripheral region of the color region extracted by the color region extracting section, and
• iii) a hue of the color region extracted by the color region extracting section,
• a concealing image generating section that is configured to:
• i) convert the color region determined to be adopted as the concealing region by the determination section into the concealing region, and ii) generate a concealing image including the concealing region, the concealing image reducing a visibility of an original content of a part of the received image, and being different from the color region;
• a graying image generating section that performs gray image generation of the received image and generates a grayed image;
• and
• an image combining section that is configured to superimpose the concealing image on a part of the grayed image, the part including information to be concealed, to generate a single image of the concealing image and the grayed image, wherein
• the concealing image generating section is configured to generate the concealing image based on the low definition image having a lower definition than the received image.

A non-transitory computer readable medium storing a program causing a computer to execute a process for image processing, the process comprising:

• generating a low definition image having a lower definition than a received image, based on the received image;
• extracting a color region from the low definition image by extracting pixels of the low definition image which have saturation greater than or equal to a value greater than zero, the color region corresponding to a region marked as a to-be-masked region;
• converting the color region into a concealing region for concealing a part of the received image, based on the color region;
• generating a concealing image including the concealing region, the concealing image reducing a visibility of an original content of the part of the received image, and being different from the color region;
• performing gray image generation of the received image so as to generate a grayed image;
• and
• superimposing the concealing image on a part of the grayed image, the part including information to be concealed, to generate a single image of the concealing image and the grayed image.

A non-transitory computer readable medium storing a program causing a computer to execute a process for image processing, the process comprising:

• extracting a color region from a received image by extracting pixels of a low definition image which have saturation greater than or equal to a value greater than zero, the color region corresponding to a region marked as a to-be-masked region;
• determining whether the color region is to be adopted as a concealing region for concealing a part of the received image, based on at least one of:
• i) a lightness of the color region, ii) a lightness of a peripheral region of the color region, and iii) a hue of the color region;
• converting the color region determined to be adopted as the concealing region into the concealing region;
• generating a concealing image including the concealing region, the concealing image reducing a visibility of an original content of a part of the received image, and being different from the color region;
• performing gray image generation of the received image so as to generate a grayed image;
• and
• superimposing the concealing image on a part of the grayed image, the part including information to be concealed, to generate a single image of the concealing image and the grayed image, wherein
• the concealing image is generated based on the low definition image having a lower definition than the received image.