# US 12,192,627 B2 · Signal processing device, signal processing method, signal processing program, imaging apparatus and lens apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,627 B2 - Document ID: US12192627B2 - Status: Granted - Kind: B2 - Application number: 18/188,301 - Filed: 2023-03-22 - Published: 2023-07-20 - Granted: 2025-01-07 - Earliest claimed: 2020-09-24 - Assignees: FUJIFILM Corporation - Applicants: FUJIFILM Corporation - Inventors: Toshiki Kobayashi; Yota Akashi; Yuya Hirakawa; Yuta Watanabe - Web page: https://patentgrep.com/patent/US12192627B2 ## CPC - H04N 23/683: {performed by a processor, e.g. controlling the readout of an image memory} - H04N 23/687: {by shifting the lens or sensor position} - G03B 5/00: Adjustment of optical system relative to image or object surface other than for focusing - H04N 23/64: {Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image} - H04N 23/6812: {based on additional sensors, e.g. acceleration sensors} - H04N 23/73: by influencing the exposure time - H04N 23/80: Camera processing pipelines; Components thereof - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) ## Abstract Provided are a signal processing device, a signal processing method, a signal processing program, an imaging apparatus, and a lens apparatus capable of accurately calculating an amount of blurring on the basis of a signal which is output from a blurring detection sensor. The signal processing device processes a signal which is output from a blurring detection sensor in progress of exposure of an imaging element. The signal processing device includes a processor. The processor is configured to perform processing of generating a second signal obtained by performing high-pass filter processing on a first signal which is output from the blurring detection sensor; and processing of calculating an amount of blurring on the basis of the first signal or the second signal. ## Claims ### Claim 1 A signal processing device that processes a signal which is output from a blurring detection sensor in progress of exposure of an imaging element, the signal processing device comprising a processor, wherein the processor is configured to perform: processing of generating a second signal obtained by performing high-pass filter processing on a first signal which is output from the blurring detection sensor; and processing of calculating an amount of blurring on the basis of the first signal or the second signal, wherein in calculation of the amount of blurring, the processor switches a signal to be used for calculating the amount of blurring, on the basis of an exposure time of the imaging element and an elapsed time for calculation in the high-pass filter processing. ### Claim 2 (depends on 1) The signal processing device according to claim 1, wherein in the calculation of the amount of blurring based on the second signal, in a case where the calculation of the high-pass filter processing is reset, the processor switches from the second signal to the first signal and calculates the amount of blurring. ### Claim 3 (depends on 1) The signal processing device according to claim 1, wherein in a case where the exposure time is greater than a first threshold value and the elapsed time for calculation is equal to or less than a second threshold value, the processor calculates the amount of blurring on the basis of the first signal during a period from start of the exposure to a third threshold value, and calculates the amount of blurring on the basis of the second signal after elapse of the period from the start of the exposure to the third threshold value. ### Claim 4 (depends on 1) The signal processing device according to claim 1, wherein in a case where the exposure time is equal to or less than a first threshold value, the processor calculates the amount of blurring on the basis of the first signal. ### Claim 5 (depends on 1) The signal processing device according to claim 1, wherein in a case where the exposure time is greater than a first threshold value and the elapsed time for calculation is greater than a second threshold value, the processor calculates the amount of blurring on the basis of the second signal. ### Claim 6 (depends on 3) The signal processing device according to claim 3, wherein the first threshold value, the second threshold value, and the third threshold value are set on the basis of a cut-off frequency in the high-pass filter processing and an offset of the blurring detection sensor. ### Claim 7 (depends on 6) The signal processing device according to claim 6, wherein the processor further performs processing of calculating the offset on the basis of a signal which is output from the blurring detection sensor. ### Claim 8 (depends on 7) The signal processing device according to claim 7, wherein the processor is configured to perform: in the calculation of the offset, processing of obtaining a direct current component of a signal which is output from the blurring detection sensor and calculating a first feature amount; processing of obtaining a gradient of an accumulated integral value of a signal which is output from the blurring detection sensor and calculating a second feature amount; and processing of calculating the offset on the basis of the first feature amount and the second feature amount. ### Claim 9 (depends on 1) An imaging apparatus comprising: a blurring detection sensor that is provided in an apparatus body; and the signal processing device according to claim 1 that processes a signal which is output from the blurring detection sensor. ### Claim 10 (depends on 1) A lens apparatus comprising: a blurring detection sensor that is provided in an apparatus body; and the signal processing device according to claim 1 that processes a signal which is output from the blurring detection sensor. ### Claim 11 A signal processing method for processing a signal which is output from a blurring detection sensor in progress of exposure of an imaging element, the signal processing method comprising: processing of generating a second signal obtained by performing high-pass filter processing on a first signal which is output from the blurring detection sensor; and processing of calculating an amount of blurring on the basis of the first signal or the second signal, wherein in the processing of calculating the amount of blurring, a signal to be used for calculating the amount of blurring is switched on the basis of an exposure time of the imaging element and an elapsed time for calculation in the high-pass filter processing. ### Claim 12 A non-transitory, computer-readable tangible recording medium which records thereon a program that causes, when read by a computer, the computer to execute: processing of acquiring a signal which is output from a blurring detection sensor in progress of exposure of an imaging element; processing of generating a second signal obtained by performing high-pass filter processing on a first signal which is output from the blurring detection sensor; and processing of calculating an amount of blurring on the basis of the first signal or the second signal, wherein in the processing of calculating the amount of blurring, a signal to be used for calculating the amount of blurring is switched on the basis of an exposure time of the imaging element and an elapsed time for calculation in the high-pass filter processing.