# US 2017/0255253 A1 · Projector and image drawing method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0255253 A1 - Document ID: US20170255253A1 - Status: Published application - Kind: A1 - Application number: 15/599,742 - Filed: 2017-05-19 - Published: 2017-09-07 - Earliest claimed: 2011-10-13 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Kazuki Nagai - Web page: https://patentgrep.com/patent/US20170255253A1 ## CPC - G06F 3/01: Input arrangements or combined input and output arrangements for interaction between user and computer (G06F3/16 takes precedence) - G06F 3/0425: {using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected (tracking a projected light spot to determine a position on a display surface G06F3/0386)} - G06F 3/04883: for inputting data by handwriting, e.g. gesture or text - G06V 30/333: {Preprocessing; Feature extraction} - G06V 40/28: {Recognition of hand or arm movements, e.g. recognition of deaf sign language (static hand signs G06V40/113)} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract A projector includes a position recognition section, an identification information recognition section, an acquisition section, and a drawing control section. The position recognition section recognizes a drawing area in which an image is to be drawn based on a first trajectory of a first symbol. The identification information recognition section recognizes, based on a second trajectory of a second symbol, identification information linked with image data representing the image. The acquisition section acquires image data representing the image based on the identification information. The drawing control section performs control so that the image represented by the image data is drawn in a drawing area of a projection surface. ## Claims ### Claim 1 A projector comprising: a position recognition section adapted to recognize a drawing area in which an image is to be drawn based on a first trajectory of a first symbol, the drawing area being designated in a projection surface; an identification information recognition section adapted to recognize, based on a second trajectory of a second symbol, identification information linked with image data representing the image; an acquisition section adapted to acquire image data representing the image based on the identification information; and a drawing control section adapted to perform control so that the image represented by the image data is drawn in the drawing area of the projection surface, wherein the drawing control section performs control so that the second symbol and the image represented by the image data are displayed concurrently. ### Claim 2 (depends on 1) The projector according to claim 1, wherein the acquisition section acquires the image data and the identification information linked with the image data, and the drawing control section makes the image, which is represented by the image data linked with the identification information recognized by the identification information recognition section, be drawn in the drawing area of the projection surface recognized by the position recognition section. ### Claim 3 (depends on 1) The projector according to claim 1, wherein the identification information recognition section determines whether or not the second symbol is included in the second trajectory to thereby recognize the identification information. ### Claim 4 (depends on 1) The projector according to claim 1, wherein the position recognition section recognizes a plurality of drawing areas, the identification information recognition section recognizes a plurality of pieces of identification information, and the drawing control section determines a correspondence relationship between each drawing area of the plurality of drawing areas and at least one piece of identification information of the plurality of pieces of identification information based on at least one of a position of each drawing area, a position of each piece of identification information, and a number at which each drawing area and each piece of identification information are recognized. ### Claim 5 (depends on 1) The projector according to claim 1, wherein the identification information includes information representing one of a color and a shape of the first trajectory adapted to designate the drawing area, and the identification information recognition section recognizes the identification information based on the one of the color and the shape of the first trajectory. ### Claim 6 (depends on 1) The projector according to claim 1, further comprising: a control information recognition section adapted to recognize control information, which is used for controlling reproduction of the image, based on the second trajectory, wherein the drawing control section controls the reproduction of the image with the control information recognized by the control information recognition section. ### Claim 7 (depends on 1) The projector according to claim 1, wherein the drawing control section updates the image if a change in the second trajectory fulfills a predetermined condition. ### Claim 8 An image drawing method comprising: recognizing a drawing area in which an image is to be drawn based on a first trajectory of a first symbol, the drawing area being designated in a projection surface; recognizing, based on a second trajectory of a second symbol, identification information linked with image data representing the image; acquiring image data representing the image based on the identification information; and drawing the image, which is represented by the image data, in the drawing area on the projection surface, wherein the second symbol and the image represented by the image data are displayed concurrently. ### Claim 9 (depends on 1) The projector according to claim 1, wherein the identification information includes a predetermined color that is associated with the image data, and a user selects the image to be drawn in the drawing area by writing, on the projection surface, the first trajectory of the first symbol, which defines boundaries of the drawing area, in the predetermined color associated with the image data. ### Claim 10 (depends on 1) The projector according to claim 1, wherein the drawing area is defined by a predetermined trajectory defining at least one substantially horizontal boundary and at least one substantially vertical boundary, and the image represented by the image data is drawn inside the drawing area defined by the at least one substantially horizontal boundary and the at least one substantially vertical boundary based on the identification information linked with the image data representing the image indicated by the second trajectory of the second symbol, which a user draws outside of the drawing area defined by the at least one substantially horizontal boundary and the at least one substantially vertical boundary.