Image processing apparatus, image forming apparatus, display apparatus, image processing method, and storage medium

An image forming apparatus, comprising:

• a controller;
• and
• an image former,
• wherein the controller:
• receives input of a first image that is configured to be viewed up close;
• receives input of a second image that is configured to be viewed from a distance;
• extracts a high-frequency image from the first image that is configured to be viewed up close;
• extracts a low-frequency image from the second image that is configured to be viewed from a distance;
• extracts a density change portion of one of the second image and the low-frequency image;
• determines a composite position of the high-frequency image and the low-frequency image so that a degree of overlap between the density change portion and one of the first image and the high-frequency image is small;
• and
• combines the high-frequency image and the low-frequency image at the determined composite position, and the image former forms the combined image onto a recording medium.

A display apparatus, comprising:

• a controller;
• and
• a display,
• wherein the controller:
• receives input of a first image that is configured to be viewed up close;
• receives input of a second image that is configured to be viewed from a distance;
• extracts a high-frequency image from the first image that is configured to be viewed up close;
• extracts a low-frequency image from the second image that is configured to be viewed from a distance;
• extracts a density change portion of one of the second image and the low-frequency image;
• determines a composite position of the high-frequency image and the low-frequency image so that a degree of overlap between the density change portion and one of the first image and the high-frequency image is small;
• and
• combines the high-frequency image and the low-frequency image at the determined composite position, and the display displays the combined image.

An image processing method, comprising:

• extracting a high-frequency image from an input first image that is configured to be viewed up close;
• extracting a low-frequency image from an input second image that is configured to be viewed from a distance;
• extracting a density change portion of one of the second image and the low-frequency image;
• determining a composite position of the high-frequency image and the low-frequency image so that a degree of overlap between the density change portion and one of the first image and the high-frequency image is small;
• and
• combining the high-frequency image and the low-frequency image at the composite position.

A non-transitory computer-readable storage medium storing a program for causing a computer to:

• extract a high-frequency image from an input first image that is configured to be viewed up close;
• extract a low-frequency image from an input second image that is configured to be viewed from a distance;
• extract a density change portion of one of the second image and the low-frequency image;
• determine a composite position of the high-frequency image and the low-frequency image so that a degree of overlap between the density change portion and one of the first image and the high-frequency image is small;
• and combine the high-frequency image and the low-frequency image at the composite position.