# US 10,122,933 B2 · Method and apparatus for recording an image sequence of an area surrounding a vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,122,933 B2 - Document ID: US10122933B2 - Status: Granted - Kind: B2 - Application number: 13/163,213 - Filed: 2011-06-17 - Published: 2011-12-22 - Granted: 2018-11-06 - Earliest claimed: 2010-06-19 - Assignees: Volkswagen Aktiengesellschaft - Applicants: Georg Lambert; Reiner Katzwinkel - Inventors: Georg Lambert; Reiner Katzwinkel - Web page: https://patentgrep.com/patent/US10122933B2 ## CPC - H04N 23/70: Circuitry for compensating brightness variation in the scene - H04N 23/75: by influencing optical camera components - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract Optical radiation from an area surrounding a vehicle is detected by a sensor in order to record an image sequence of the surrounding area. The sensor may be exposed continuously to the radiation which is incident on it while the image sequence is being recorded in order to detect a light pulse of an indefinitely short time duration. ## Claims ### Claim 1 A method for recording an image sequence of an area surrounding a vehicle, the method comprising: detecting optical radiation from the surrounding area by a sensor to record the image sequence; regulating an amount of light from the radiation which is incident on the sensor such that the amount of light per unit time on the sensor is kept below a predetermined threshold value during the recording of the image sequence, wherein the regulating of the amount of light incident on the sensor to the predetermined threshold value is performed independently of the brightness conditions in the surrounding area; and continuously exposing the sensor to the optical radiation which is incident on the sensor during an entire cycle time while recording the image sequence, wherein the detection, regulation and continuous exposure are performed simultaneously and the regulating of the amount of light incident on the sensor prevents overloading of the sensor, thereby enabling exposure time of the sensor to be set to a maximum value independently of the brightness conditions in the surrounding area, and a pause time of the sensor to be set shorter than a predetermined time duration which corresponds to a predetermined light pulse duration of a light pulse that is to be detected by the sensor. ### Claim 2 (depends on 1) The method of claim 1, further comprising setting an exposure time, in which the sensor converts the radiation which is incident on the sensor to electrical signals, independently of a light intensity of the radiation from the surrounding area. ### Claim 3 (depends on 1) The method of claim 1, further comprising damping the radiation which is incident on the sensor by a damping filter depending on a light intensity of the radiation from the surrounding area such that the sensor is not overloaded. ### Claim 4 (depends on 1) The method of claim 1, further comprising controlling an amount of light of the radiation which is incident on the sensor by a variable aperture depending on a light intensity of the radiation from the surrounding area such that the sensor is not overloaded. ### Claim 5 An apparatus configured to record an image sequence of an area surrounding a vehicle, the apparatus comprising: a controller; and a sensor coupled to the controller and configured to detect optical radiation from the surrounding area to record the image sequence, wherein the controller is configured to regulate an amount of light from the radiation which is incident on the sensor such that the amount of light per unit time on the sensor is kept below a predetermined threshold value during the recording of the image sequence, and wherein the sensor is exposed continuously to the radiation which is incident on the sensor during an entire cycle time while the image sequence is being recorded, wherein the detection, regulation and continuous exposure are performed simultaneously, wherein the regulating of the amount of light incident on the sensor to the predetermined threshold value is performed independently of the brightness conditions in the surrounding area; and wherein the regulating of the amount of light incident on the sensor prevents overloading of the sensor, thereby enabling exposure time of the sensor to be set to a maximum value independently of the brightness conditions in the surrounding area, and a pause time of the sensor to be set shorter than a predetermined time duration which corresponds to a predetermined light pulse duration of a light pulse that is to be detected by the sensor. ### Claim 6 (depends on 5) The apparatus of claim 5 further comprising a damping filter arranged with respect to the sensor such that the optical radiation from the surrounding area is incident on the sensor through the damping filter, and wherein the controller is configured to control operation of the damping filter depending on a light intensity of the radiation from the surrounding area such that the damping filter dampens the radiation which is incident on the sensor such that the sensor is not overloaded. ### Claim 7 (depends on 5) The apparatus of claim 5 further comprising a variable aperture arranged with respect to the sensor such that the optical radiation from the surrounding area is incident on the sensor through the variable aperture, and wherein the controller is configured to control operation of the variable aperture depending on a light intensity of the radiation from the surrounding area, such that the variable aperture controls an amount of light of the radiation which is incident on the sensor such that the sensor is not overloaded. ### Claim 8 (depends on 5) The apparatus of claim 5, wherein the apparatus is configured to: detect optical radiation from the surrounding area by the sensor to record the image sequence; and continuously expose the sensor to the optical radiation which is incident on the sensor while recording the image sequence to detect a light pulse of an indefinitely short time duration. ### Claim 9 A vehicle including an apparatus configured to record an image sequence of an area surrounding the vehicle, the apparatus comprising: a controller; and a sensor coupled to the controller and configured to detect optical radiation from the surrounding area to record the image sequence, wherein the controller is configured to regulate an amount of light from the radiation which is incident on the sensor such that the amount of light per unit time on the sensor is kept below a predetermined threshold value during the recording of the image sequence, and wherein the sensor is exposed continuously to the radiation which is incident on the sensor during an entire cycle time while the image sequence is being recorded, wherein the detection, regulation and continuous exposure are performed simultaneously wherein the regulating of the amount of light incident on the sensor to the predetermined threshold value is performed independently of the brightness conditions in the surrounding area; and wherein the regulating of the amount of light incident on the sensor prevents overloading of the sensor, thereby enabling exposure time of the sensor to be set to a maximum value independently of the brightness conditions in the surrounding area, and a pause time of the sensor to be set shorter than a predetermined time duration which corresponds to a predetermined light pulse duration of a light pulse that is to be detected by the sensor. ### Claim 10 (depends on 9) The vehicle of claim 9, wherein the vehicle further comprises a monitor on which the recorded image sequence is reproduced. ### Claim 11 (depends on 5) The apparatus of claim 5 included in a digital external mirror in a vehicle. ### Claim 12 (depends on 8) The apparatus of claim 8 included in a digital external mirror in a vehicle.