# US 2009/0262199 A1 · Notebook information processor and projective transformation parameter calculating method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2009/0262199 A1 - Document ID: US20090262199A1 - Status: Published application - Kind: A1 - Application number: 12/248,637 - Filed: 2008-10-09 - Published: 2009-10-22 - Earliest claimed: 2008-04-18 - Assignees: Pfu Limited - Inventors: Satoshi MIYAMOTO; Nobuhisa Yamazaki; Jiyun Du; Masanari Takabatake - Web page: https://patentgrep.com/patent/US20090262199A1 ## CPC - H04N 1/387: Composing, repositioning or otherwise {geometrically} modifying originals - G06T 3/00: Geometric image transformations in the plane of the image - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL ## Abstract A notebook information processor includes a lid including an image photographing unit and a display, and a main body, wherein the control unit includes a live view displaying unit that displays a live view obtained by photographing at least a portion of the main body within a photographing area of the image photographing unit on the display, a rectangle detecting unit that detects a rectangle for calculating a projective transformation parameter from the live view, a projective transformation parameter calculating unit that calculates the projective transformation parameter from a coordinate of the rectangle, and a still image obtaining unit that performs a projective transformation on the live view so as to obtain a live view photographed from a front direction, using the projective transformation parameter, obtains a still image from the live view after the projective transformation, and stores the still image in the storage unit. ## Claims ### Claim 1 A notebook information processor, comprising: a lid including an image photographing unit and a display; and a main body including a storage unit and a control unit, wherein the control unit includes: a live view displaying unit that displays a live view obtained by photographing at least a portion of the main body within a photographing area of the image photographing unit on the display; a rectangle detecting unit that detects a rectangle for calculating a projective transformation parameter from the live view displayed on the display by the live view displaying unit; a projective transformation parameter calculating unit that calculates the projective transformation parameter from a coordinate of the rectangle detected by the rectangle detecting unit; and a still image obtaining unit that performs a projective transformation on the live view so as to obtain a live view photographed from a front direction, using the projective transformation parameter calculated by the projective transformation parameter calculating unit, obtains a still image from the live view after the projective transformation, and stores the still image in the storage unit. ### Claim 2 (depends on 1) The notebook information processor according to claim 1, wherein the main body further includes a touch pad; and the rectangle detecting unit detects at least a portion of the touch pad as the rectangle for calculating the projective transformation parameter. ### Claim 3 (depends on 1) The notebook information processor according to claim 1, wherein the main body further includes a keyboard; and the rectangle detecting unit detects at least a portion of the keyboard as the rectangle for calculating the projective transformation parameter. ### Claim 4 (depends on 3) The notebook information processor according to claim 3, wherein the rectangle detecting unit detects at least a portion of a shape of at least one key top forming the keyboard as the rectangle for calculating the projective transformation parameter. ### Claim 5 (depends on 1) The notebook information processor according to claim 1, wherein a rectangular sign is displayed on an upper surface of the main body; and the rectangle detecting unit detects at least a portion of the sign as the rectangle for calculating the projective transformation parameter. ### Claim 6 (depends on 1) The notebook information processor according to claim 1, wherein the rectangle detecting unit detects at least a portion of an appearance of the main body as the rectangle for calculating the projective transformation parameter. ### Claim 7 A projective transformation parameter calculating method executed by a notebook information processor, including: a lid including an image photographing unit and a display; and a main body including a storage unit and a control unit, the method comprising: a live view displaying step of displaying a live view obtained by photographing at least a portion of the main body within a photographing area of the image photographing unit on the display; a rectangle detecting step of detecting a rectangle for calculating a projective transformation parameter from the live view displayed on the display by the live view displaying unit; a projective transformation parameter calculating step of calculating the projective transformation parameter from a coordinate of the rectangle detected by the rectangle detecting unit; and a still image obtaining step of performing a projective transformation on the live view so as to obtain a live view photographed from a front direction, using the projective transformation parameter calculated by the projective transformation parameter calculating unit, obtains a still image from the live view after the projective transformation, and stores the still image in the storage unit. ### Claim 8 (depends on 7) The projective transformation parameter calculating method according to claim 7, wherein the main body further includes a touch pad; and the rectangle detecting step is executed for detecting at least a portion of the touch pad as the rectangle for calculating the projective transformation parameter. ### Claim 9 (depends on 7) The projective transformation parameter calculating method according to claim 7, wherein the main body further includes a keyboard; and the rectangle detecting step is executed for detecting at least a portion of the keyboard as the rectangle for calculating the projective transformation parameter. ### Claim 10 (depends on 9) The projective transformation parameter calculating method according to claim 9, wherein the rectangle detecting step is executed for detecting at least a portion of a shape of at least one key top forming the keyboard as the rectangle for calculating the projective transformation parameter. ### Claim 11 (depends on 7) The projective transformation parameter calculating method according to claim 7, wherein a rectangular sign is displayed on an upper surface of the main body; and the rectangle detecting step is executed for detecting at least a portion of the sign as the rectangle for calculating the projective transformation parameter. ### Claim 12 (depends on 7) The projective transformation parameter calculating method according to claim 7, wherein the rectangle detecting step is executed for detecting at least a portion of an appearance of the main body as the rectangle for calculating the projective transformation parameter.