INFORMATION PROCESSOR, INFORMATION PROCESSING METHOD, AND RECORDING MEDIUM

• US 20130163812A1
• Filed: 11/29/2012
• Published: 06/27/2013
• Est. Priority Date: 12/22/2011
• Status: Abandoned Application

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: MUKASA, Shinya
• Application Number:
  US13/688,489
• Publication Number:
  US 20130163812A1
• Time in Patent Office: Days
• US Class Current: 382/103
• CPC Class Codes: G06T 9/00 Image coding bandwidth or redundancy reduction for static pictures H04N1/41; coding or decoding of static colour picture signals H04N1/64; methods or arrangements for coding, decoding, compressing or decompressing digital video signals H04N19/00
• CPC Class Codes: H04N 19/507 using conditional replenishment
• CPC Class Codes: H04N 19/85 using pre-processing or post-processing specially adapted for video compression

Abstract

An information processor includes an image capturing part configured to obtain a displayed screen image; a storage part configured to store the screen image each time the screen image is obtained; an image comparison part configured to generate one or more difference pixels by comparing a screen image stored last and the obtained screen image; a difference region determination part configured to determine the smallest rectangular region including the difference pixels as a difference region based on a predetermined rectangle formed of a predetermined number of pixels, the screen image being divided using the predetermined rectangle as a unit; a compressed difference image generation part configured to generate a compressed difference image by compressing a difference image using the predetermined rectangle as a unit, the difference region being cut out from the screen image into the difference image; and an image transmission part configured to transmit the compressed difference image.

Claims

1. An information processor, comprising:

an image capturing part configured to obtain a screen image displayed on a display part;

a storage part configured to store the screen image each time the screen image is obtained by the image capturing part;

an image comparison part configured to generate one or more difference pixels by comparing a last screen image stored a last time by the storage part and the screen image obtained by the image capturing part;

a difference region determination part configured to determine a smallest rectangular region that includes the one or more difference pixels as a difference region based on a predetermined rectangle formed of a predetermined number of pixels, wherein the screen image is divided using the predetermined rectangle as a unit;

a compressed difference image generation part configured to generate a compressed difference image by performing compression on a difference image using the predetermined rectangle as a unit, wherein the difference region is cut out from the screen image into the difference image; and

an image transmission part configured to transmit the compressed difference image to an image display unit connected to the information processor via a network.

2. The information processor as claimed in claim 1, wherein the screen image is rectangular, and

the rectangular screen image is divided in units of the predetermined number of pixels using a point of one of four corners of the rectangular screen image as an origin for dividing the rectangular screen image.

3. The image processor as claimed in claim 1, wherein the screen image is divided in units of the predetermined number of pixels using a point of one of four corners of a rectangular region that is circumscribed about a leftmost difference pixel, a rightmost difference pixel, a topmost difference pixel, and a bottommost difference pixel of the one or more difference pixels extracted by the image comparison part as an origin for dividing the screen image.

4. The image processor as claimed in claim 1, wherein the compression is JPEG compression.

5. A non-transitory computer-readable recording medium having a program recorded thereon, wherein the program is executed by a processor of an information processor to implement:

an image capturing part configured to obtain a screen image displayed on a display part;

a storage part configured to store the screen image each time the screen image is obtained by the image capturing part;

an image comparison part configured to generate one or more difference pixels by comparing a last screen image stored a last time by the storage part and the screen image obtained by the image capturing part;

a difference region determination part configured to determine a smallest rectangular region that includes the one or more difference pixels as a difference region based on a predetermined rectangle formed of a predetermined number of pixels, wherein the screen image is divided using the predetermined rectangle as a unit;

a compressed difference image generation part configured to generate a compressed difference image by performing compression on a difference image using the predetermined rectangle as a unit, wherein the difference region is cut out from the screen image into the difference image; and

an image transmission part configured to transmit the compressed difference image to an image display unit connected to the information processor via a network.

6. The non-transitory computer-readable recording medium as claimed in claim 5, wherein the screen image is rectangular, and

the rectangular screen image is divided in units of the predetermined number of pixels using a point of one of four corners of the rectangular screen image as an origin for dividing the rectangular screen image.

7. The non-transitory computer-readable recording medium as claimed in claim 5, wherein the screen image is divided in units of the predetermined number of pixels using a point of one of four corners of a rectangular region that is circumscribed about a leftmost difference pixel, a rightmost difference pixel, a topmost difference pixel, and a bottommost difference pixel of the one or more difference pixels extracted by the image comparison part as an origin for dividing the screen image.

8. The non-transitory computer-readable recording medium as claimed in claim 5, wherein the compression is JPEG compression.

9. An information processing method, comprising:

obtaining a screen image displayed on a display part of an information processor;

storing the screen image each time the screen image is obtained by said obtaining;

generating one or more difference pixels by comparing a last screen image stored a last time by said storing and the screen image obtained by said obtaining;

determining a smallest rectangular region that includes the one or more difference pixels as a difference region based on a predetermined rectangle formed of a predetermined number of pixels, wherein the screen image is divided using the predetermined rectangle as a unit;

generating a compressed difference image by performing compression on a difference image using the predetermined rectangle as a unit, wherein the difference region is cut out from the screen image into the difference image; and

transmitting the compressed difference image to an image display unit connected to the information processor via a network.