# US 8,542,808 B2 · Contact image selection and association method and system for mobile device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,542,808 B2 - Document ID: US8542808B2 - Status: Granted - Kind: B2 - Application number: 13/097,436 - Filed: 2011-04-29 - Published: 2011-08-25 - Granted: 2013-09-24 - Earliest claimed: 2006-07-14 - Assignees: BlackBerry Limited - Applicants: Piotr Tysowski; Earl Wikkerink; Stuart Pollock - Inventors: Piotr Tysowski; Earl Wikkerink; Stuart Pollock - Web page: https://patentgrep.com/patent/US8542808B2 ## CPC - H04N 19/192: the adaptation method, adaptation tool or adaptation type being iterative or recursive - G06F 16/51: Indexing; Data structures therefor; Storage structures - H04N 19/124: Quantisation - H04N 19/152: by measuring the fullness of the transmission buffer - H04N 19/172: the region being a picture, frame or field - H04N 19/184: the unit being bits, e.g. of the compressed video stream - H04N 19/60: using transform coding - H04M 1/27475: using interactive graphical means or pictorial representations - H04M 1/576: {associated with a pictorial or graphical representation} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) ## Abstract A method and computing device for encoding an image according to a preset encoding parameter for the image. The encoding producing an encoded image having a file size. If it is determined that the file size exceeds a maximum file size and the encoding parameter does not meet a threshold, the encoding parameter is modified. The encoding, determining and modifying are repeated until the file size does not exceed a maximum file size or the encoding parameter meets the threshold. ## Claims ### Claim 1 A computer-implemented method for encoding an image based on a maximum file size requirement, the method comprising: receiving a selection of a portion of the image; cropping the image according to the selection, to produce a sub-image; setting an encoding parameter; encoding the sub-image according to the encoding parameter to produce an encoded sub-image; determining that a file size of the sub-image file exceeds the maximum file size and that the encoding parameter does not meet a threshold and, in response, modifying the encoding parameter; repeating the encoding, the determining, and the modifying until the file size does not exceed the maximum file size or the encoding parameter meets the threshold; and saving the encoded sub-image. ### Claim 2 (depends on 1) The method according to claim 1 wherein the encoding parameter comprises any one of a quality factor, image dimensions and color depth. ### Claim 3 (depends on 1) The method according to claim 1 wherein the maximum file size is about 3 kilobytes. ### Claim 4 (depends on 1) The method according to claim 1 wherein encoding the sub-image comprises encoding the sub-image according to any one of JPEG, GIF and PNG image file formats. ### Claim 5 (depends on 1) The method according to claim 1 wherein setting an encoding parameter comprises setting a JPEG compression quality factor to about 75 on a scale of 0 to 100, wherein modifying the encoding parameter comprises decreasing the quality factor and wherein the encoding parameter meets the threshold when the quality factor is below about 50. ### Claim 6 (depends on 5) The method according to claim 5, comprising receiving configuration data from a host system before setting the quality factor, the configuration data containing any one of an initial encoding parameter, a threshold encoding parameter and a maximum file size. ### Claim 7 A computing device for encoding an image based on a maximum file size requirement, the device comprising: a memory containing at least one image file containing image data for rendering an image; and a cropping module for receiving a selection of a portion of an image and cropping the image according to the selection, to produce a sub-image; an image encoder for receiving selection of the sub-image and encoding the sub-image according to an encoding parameter to produce a sub-image file, wherein the image encoder is configured to incrementally modify the encoding parameter and re-encode the sub-image with the modified encoding parameter until a file size of the sub-image file exceeds the maximum file size or the encoding parameter meets a threshold and to save the encoded sub-image. ### Claim 8 (depends on 7) The computer implemented method according to claim 7 wherein the encoding parameter comprises any one of a quality factor, image dimensions and color depth. ### Claim 9 (depends on 7) The computing device according to claim 7 wherein the maximum file size is about 3 kilobytes. ### Claim 10 (depends on 7) The computing device according to claim 7 wherein the image encoder comprises any one of a JPEG, GIF and PNG image encoder. ### Claim 11 (depends on 7) The computing device according to claim 7 wherein the encoding parameter comprises a JPEG compression quality factor of about 75 on a scale of 0 to 100 and the threshold comprises about 50, and wherein the image encoder is configured to modify the encoding parameter by decreasing the encoding parameter. ### Claim 12 A non-transitory machine-readable medium having encoded thereon computer-readable instructions executable by a processor, the computer-readable instructions for: receiving a selection of a portion of an image; cropping the image according to the selection, to produce a sub-image; setting an encoding parameter; encoding the sub-image according to the encoding parameter to produce an encoded sub-image; determining that a file size of the sub-image file exceeds the maximum file size and that the encoding parameter does not meet a threshold and, in response, modifying the encoding parameter; repeating the encoding, the determining, and the modifying until the file size does not exceed the maximum file size or the encoding parameter meets the threshold; and saving the encoded sub-image. ### Claim 13 (depends on 12) The non-transitory machine-readable medium according to claim 12 wherein the encoding parameter comprises any one of a quality factor, image dimensions and color depth. ### Claim 14 (depends on 12) The non-transitory machine-readable medium according to claim 12 wherein the maximum file size is about 3 kilobytes. ### Claim 15 (depends on 12) The non-transitory machine-readable medium according to claim 12 wherein the instructions for encoding the sub-image comprise instructions for encoding the sub-image according to anyone of JPEG, GIF and PNG image file formats. ### Claim 16 (depends on 12) The non-transitory machine-readable medium according to claim 12 wherein the instructions for setting an encoding parameter comprise instructions for setting a JPEG compression quality factor to about 75 on a scale of 0 to 100, wherein modifying the encoding parameter comprises decreasing the quality factor and wherein the encoding parameter meets the threshold when the quality factor is below about 50.