# US 8,149,249 B1 · Feedback during crossing of zoom levels > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,149,249 B1 - Document ID: US8149249B1 - Status: Granted - Kind: B1 - Application number: 13/249,658 - Filed: 2011-09-30 - Granted: 2012-04-03 - Earliest claimed: 2010-09-22 - Assignees: Google Inc. - Inventors: Andrew Oplinger - Web page: https://patentgrep.com/patent/US8149249B1 ## CPC - G06F 3/04883: for inputting data by handwriting, e.g. gesture or text - G09G 5/00: Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators (image data processing or generation, in general G06T) - G06F 2203/04806: Zoom, i.e. interaction techniques or interactors for controlling the zooming operation - G06F 2203/04808: Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen - G09G 2340/045: Zooming at least part of an image, i.e. enlarging it or shrinking it - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract Aspects of this disclosure are directed to zooming into or out of image content. A user may request to zoom into or out of image content by inputting a multi-touch gesture. The request may reach one or more discrete zoom levels of a plurality of discrete zoom levels. Discrete zoom levels may indicate specific magnification factors for which a device may be able to clearly render image content. The device may output an indication when the request reaches the one or more discrete zoom levels. ## Claims ### Claim 1 A method comprising: receiving a multi-touch gesture input comprising a request to zoom in or zoom out of image content that is displayed using a touch-sensitive surface of a device; determining, during receipt of the multi-touch gesture input using the touch-sensitive surface, whether the request to zoom in or zoom out of the image content has reached one or more discrete zoom levels of a plurality of discrete zoom levels, wherein the one or more discrete zoom levels are between a maximum and a minimum zoom boundary for displaying the image content, and wherein each one of the one or more discrete zoom levels comprises a magnification factor for a stored version of the image content that is zoomed in or zoomed out to that magnification factor; and outputting, by the device, an indication to alert a user when the request reaches the one or more discrete zoom levels. ### Claim 2 (depends on 1) The method of claim 1, further comprising: determining one or more magnification factors during the receipt of the request; and determining whether the one or more magnification factors correspond to the one or more discrete zoom levels, wherein outputting the indication comprises outputting the indication when the request reaches the one or more discrete zoom levels based on the determination of whether the one or more magnification factors correspond to the one or more discrete zoom levels. ### Claim 3 (depends on 2) The method of claim 2, wherein determining the one or more magnification factors during receipt of the request comprises determining the one or more magnification factors during increments of the request. ### Claim 4 (depends on 2) The method of claim 2, further comprising: determining a distance traversed by the multi-touch gesture input, wherein determining the one or more magnification factors during the receipt of the request comprises determining the one or more magnification factors during receipt of the request based on the distance traversed by the multi-touch gesture input. ### Claim 5 (depends on 4) The method of claim 4, wherein determining the distance traversed by the multi-touch gesture input comprises determining a distance that two fingers moved in providing the multi-touch gesture input. ### Claim 6 (depends on 1) The method of claim 1, wherein receiving the request to zoom in or zoom out of image content comprises receiving the request to zoom in or zoom out of image content with a two-finger touch technique. ### Claim 7 (depends on 1) The method of claim 1, wherein outputting the indication comprises outputting the indication for every discrete zoom level of the plurality of discrete zoom levels that is reached by the request. ### Claim 8 (depends on 1) The method of claim 1, wherein outputting the indication comprises outputting at least one of a physical indication, an audio indication, and a visual indication to alert the user when the request reaches the one or more discrete zoom levels. ### Claim 9 (depends on 8) The method of claim 8, wherein outputting the physical indication comprises vibrating the device. ### Claim 10 (depends on 8) The method of claim 8, wherein outputting the audio indication comprises outputting a sound when the request reaches the one or more discrete zoom levels. ### Claim 11 (depends on 8) The method of claim 8, wherein outputting the visual indication comprises outputting at least one of one or more magnification factors of the one or more discrete zoom levels, and changing a color of the touch-sensitive surface of the device that displays the image content. ### Claim 12 (depends on 1) The method of claim 1, wherein the stored version of the image content that is zoomed in or zoomed out to that magnification factor is stored in an external server. ### Claim 13 A computer-readable storage medium comprising instructions that cause one or more processors to: receive a multi-touch gesture input comprising a request to zoom in or zoom out of image content that is displayed using a touch-sensitive surface of a device; determine, during receipt of the multi-touch gesture input using the touch-sensitive surface, whether the request to zoom in or zoom out of the image content has reached one or more discrete zoom levels of a plurality of discrete zoom levels, wherein the one or more discrete zoom levels are between a maximum and a minimum zoom boundary for displaying the image content, and wherein each one of the one or more discrete zoom levels comprises a magnification factor for a stored version of the image content that is zoomed in or zoomed out to that magnification factor; and output, by the device, an indication to alert a user when the request reaches the one or more discrete zoom levels. ### Claim 14 (depends on 13) The computer-readable storage medium of claim 13, further comprising instructions that cause the one or more processors to: determine one or more magnification factors during the receipt of the request; and determine whether the one or more magnification factors correspond to the one or more discrete zoom levels, wherein the instructions that cause the one or more processors to output the indication comprise instructions that cause the one or more processors to output the indication when the request reaches the one or more discrete zoom levels based on the determination of whether the one or more magnification factors correspond to the one or more discrete zoom levels. ### Claim 15 (depends on 14) The computer-readable storage medium of claim 14, wherein the instructions that cause the one or more processors to determine the one or more magnification factors during receipt of the request comprise instructions that cause the one or more processors to determine the one or more magnification factors during increments of the request. ### Claim 16 (depends on 14) The computer-readable storage medium of claim 14, further comprising instructions that cause the one or more processors to: determine a distance traversed by the multi-touch gesture input, wherein the instructions that cause the one or more processors to determine the one or more magnification factors during the receipt of the request comprise instructions that cause the one or more processors to determine the one or more magnification factors during receipt of the request based on the distance traversed by the multi-touch gesture input. ### Claim 17 (depends on 16) The computer-readable storage medium of claim 16, wherein the instructions that cause the one or more processors to determine the distance traversed by the multi-touch gesture input comprise instructions that cause the one or more processors to determine a distance that two fingers moved in providing the multi-touch gesture input. ### Claim 18 (depends on 13) The computer-readable storage medium of claim 13, wherein the instructions that cause the one or more processors to receive the request to zoom in or zoom out of image content comprise instructions that cause the one or more processors to receive the request to zoom in or zoom out of image content with a two-finger touch technique. ### Claim 19 (depends on 13) The computer-readable storage medium of claim 13, wherein the instructions that cause the one or more processors to output the indication comprise instructions that cause the one or more processors to output the indication for every discrete zoom level of the plurality of discrete zoom levels that is reached by the request. ### Claim 20 (depends on 13) The computer-readable storage medium of claim 13, wherein the instructions that cause the one or more processors to output the indication comprise instructions that cause the one or more processors to output at least one of a physical indication, an audio indication, and a visual indication to alert the user when the request reaches the one or more discrete zoom levels. ### Claim 21 (depends on 20) The computer-readable storage medium of claim 20, wherein the instructions that cause the one or more processors to output the physical indication comprise instructions that cause the one or more processors to vibrate the device. ### Claim 22 (depends on 20) The computer-readable storage medium of claim 20, wherein the instructions that cause the one or more processors to output the audio indication comprise instructions that cause the one or more processors to output a sound when the request reaches the one or more discrete zoom levels. ### Claim 23 (depends on 20) The computer-readable storage medium of claim 20, wherein the instructions that cause the one or more processors to output the visual indication comprise instructions that cause the one or more processors to output at least one of one or more magnification factors of the one or more discrete zoom levels, and changing a color of the touch-sensitive surface of the device that displays the image content. ### Claim 24 (depends on 13) The computer-readable storage medium of claim 13, wherein the stored version of the image content that is zoomed in or zoomed out to that magnification factor is stored in an external server. ### Claim 25 A device comprising: a touch-sensitive surface that receives a multi-touch gesture input comprising a request to zoom in or zoom out of image content that is displayed using a touch-sensitive surface of the device; means for determining, during receipt of the multi-touch gesture input using the touch-sensitive surface, whether the request to zoom in or zoom out of the image content has reached one or more discrete zoom levels of a plurality of discrete zoom levels, wherein the one or more discrete zoom levels are between a maximum and a minimum zoom boundary for displaying the image content, and wherein each one of the one or more discrete zoom levels comprises a magnification factor for a stored version of the image content that is zoomed in or zoomed out to that magnification factor; and one or more processors that output an indication to alert a user when the request reaches the one or more discrete zoom levels.