# US 11,445,070 B2 · Determining print quality based on information obtained from rendered image > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,070 B2 - Document ID: US11445070B2 - Status: Granted - Kind: B2 - Application number: 17/283,320 - Filed: 2019-07-22 - Published: 2021-12-16 - Granted: 2022-09-13 - Earliest claimed: 2019-01-23 - Assignees: Hewlett-Packard Development Company, L.P. - Applicants: Hewlett-Packard Development Company, L.P. - Inventors: Gwangeun Sim - Web page: https://patentgrep.com/patent/US11445070B2 ## CPC - H04N 1/6013: {by simulating several colour corrected versions of the same image simultaneously on the same picture reproducer} - G06K 15/027: {Test patterns and calibration (arrangements for controlling or analysing printing mechanisms of typewriters or selective printing units B41J29/393 takes precedence; colour correction using test pattern analysis in general H04N1/6033)} - G06V 10/993: {Evaluation of the quality of the acquired pattern} - H04N 1/00005: {relating to image data} - H04N 1/00015: {Reproducing apparatus} - H04N 1/00031: {Testing, i.e. determining the result of a trial (H04N1/00029 takes precedence; using test signals for transmission mode changing H04N2201/33371)} - H04N 1/00034: {Measuring, i.e. determining a quantity by comparison with a standard (H04N1/00031 takes precedence)} - H04N 1/00037: {Detecting, i.e. determining the occurrence of a predetermined state (H04N1/00031 takes precedence)} - H04N 1/00045: {using a reference pattern designed for the purpose, e.g. a test chart} - H04N 1/00061: {using a remote apparatus (H04N1/00066 takes precedence)} - H04N 1/00063: {using at least a part of the apparatus itself, e.g. self-testing} - H04N 1/6036: {involving periodic tests or tests during use of the machine} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract An example image forming apparatus includes an image forming apparatus, a processor, and a memory storing instructions executable by the processor. The processor of the image forming apparatus executes the instructions to render a print job, obtain information regarding a pattern for determining print quality from a rendered image of the print job, scan, through the image forming job unit, a document on which the rendered image is printed, and determine the print quality based on a scanned image of the document and the obtained information regarding the pattern. ## Claims ### Claim 1 An image forming apparatus comprising: an image forming job unit; a processor; and a memory to store instructions executable by the processor and a pattern of a diagnostic item, wherein the processor is to execute the instructions to: render a print job; identify whether a rendered image of the print job includes an object corresponding to the pattern of the diagnostic item; based on the rendered image of the print job including the object corresponding to the pattern of the diagnostic item, obtain color information of the object in the rendered image based on a location of the object in the rendered image; based on the color information corresponding to the pattern of the diagnostic item, identify that the object includes a pattern for determining print quality; scan, through the image forming job unit, a document on which the rendered image is printed; and determine the print quality based on a scanned image of the document and the pattern for determining the print quality. ### Claim 2 (depends on 1) The image forming apparatus of claim 1, wherein the processor executes the instructions to: extract a type of the object and the color information of the object in the rendered image; and determine whether the object corresponds to the pattern for determining the print quality based on the extracted type and color information of the object. ### Claim 3 (depends on 1) The image forming apparatus of claim 1, wherein the processor executes the instructions to: extract a type of the object, the color information of the object, and location information indicating the location of the object in the rendered image, based on an image file, an object tag file, and a print material property file of the print job, wherein the type of the object is determined according to the diagnostic item; detect the pattern for determining the print quality based on the extracted information; and obtain the location information for the diagnostic item with regard to the detected pattern for determining the print quality. ### Claim 4 (depends on 3) The image forming apparatus of claim 3, wherein the processor executes the instructions to determine the print quality for the diagnostic item, based on the location information obtained for the diagnostic item with regard to the scanned image. ### Claim 5 (depends on 1) The image forming apparatus of claim 1, wherein the processor executes the instructions to, based on the image forming apparatus entering a standby state and satisfying a certain condition, determine the print quality based on the scanned image of the document and the obtained information regarding the pattern. ### Claim 6 (depends on 1) The image forming apparatus of claim 1, wherein the processor executes the instructions to determine the print quality according to a predetermined cycle. ### Claim 7 (depends on 1) The image forming apparatus of claim 1, further comprising a communication interface, wherein the processor executes the instructions to receive, from a server, a correction measure corresponding to a determination result of the print quality, in response to transmission of the determination result to the server through the communication interface, and to perform correction according to the received correction measure. ### Claim 8 (depends on 1) The image forming apparatus of claim 1, wherein the processor executes the instructions to check a correction measure corresponding to a determination result in the image forming apparatus and perform correction according to the checked correction measure. ### Claim 9 A method of determining print quality, the method comprising: rendering a print job; identifying whether a rendered image of the print job includes an object corresponding to a pattern of a diagnostic item; based on the rendered image of the print job including the object corresponding to the pattern of the diagnostic item, obtaining color information of the object in the rendered image based on a location of the object in the rendered image; based on the color information corresponding to the pattern of the diagnostic item, identifying that the object includes a pattern for determining print quality; scanning a document on which the rendered image is printed; and determining the print quality based on a scanned image of the document and the pattern for determining the print quality. ### Claim 10 (depends on 9) The method of claim 9, wherein the obtaining of the information comprises: extracting a type of the object, the color information of the object, and location information indicating the location of the object in the rendered image, based on an image file, an object tag file, and a print material property file of the print job, wherein the type of the object is determined according to the diagnostic item; detecting the pattern for determining the print quality based on the extracted information; and obtaining the location information for the diagnostic item with regard to the detected pattern for determining the print quality. ### Claim 11 (depends on 10) The method of claim 10, wherein the determining of the print quality comprises determining the print quality for the diagnostic item, based on the location information obtained for the diagnostic item with regard to the scanned image. ### Claim 12 (depends on 9) The method of claim 9, wherein the determining of the print quality comprises, based on the image forming apparatus entering a standby state and satisfying a certain condition, determining the print quality based on the scanned image of the document and the obtained information regarding the pattern. ### Claim 13 (depends on 9) The method of claim 9, wherein the determining of the print quality is performed according to a predetermined cycle. ### Claim 14 A non-transitory computer-readable recording medium storing instructions executable by a processor, the computer-readable recording medium comprising: instructions to render a print job; instructions to identify whether a rendered image of the print job includes an object corresponding to a pattern of a diagnostic item; instructions to, based on the rendered image of the print job including the object corresponding to the pattern of the diagnostic item, obtain color information of the object in the rendered image based on a location of the object in the rendered image; instructions to, based on the color information corresponding to the pattern of the diagnostic item, identify that the object includes a pattern for determining print quality; instructions to scan a document on which the rendered image is printed; and instructions to determine the print quality based on a scanned image of the pattern for determining the print quality. ### Claim 15 (depends on 14) The non-transitory computer-readable recording medium of claim 14, comprising: instructions to extract a type of the object and the color information of the object in the rendered image; and instructions to determine whether the object corresponds to the pattern for determining the print quality based on the extracted type and color information of the object. ### Claim 16 (depends on 14) The non-transitory computer-readable recording medium of claim 14, comprising: instructions to extract a type of the object, the color information of the object, and location information indicating the location of the object in the rendered image, based on an image file, an object tag file, and a print material property file of the print job, wherein the type of the object is determined according to the diagnostic item; instructions to detect the pattern for determining the print quality based on the extracted information; instructions to obtain the location information for the diagnostic item with regard to the detected pattern for determining the print quality; and instructions to determine the print quality for the diagnostic item, based on the location information obtained for the diagnostic item with regard to the scanned image. ### Claim 17 (depends on 14) The non-transitory computer-readable recording medium of claim 14, comprising instructions to, based on the image forming apparatus entering a standby state and satisfying a certain condition, determine the print quality based on the scanned image of the document and the obtained information regarding the pattern. ### Claim 18 (depends on 14) The non-transitory computer-readable recording medium of claim 14, comprising instructions to determine the print quality according to a predetermined cycle. ### Claim 19 (depends on 14) The non-transitory computer-readable recording medium of claim 14, comprising instructions to receive, from a server, a correction measure corresponding to a determination result of the print quality, in response to transmission of the determination result to the server through a communication interface, and to perform correction according to the received correction measure. ### Claim 20 (depends on 14) The non-transitory computer-readable recording medium of claim 14, comprising instructions to check a correction measure corresponding to a determination result in the image forming apparatus and perform correction according to the checked correction measure.