Imaging apparatus, imaging system, target person monitoring system and control method of imaging apparatus
First Claim
Patent Images
1. An imaging apparatus comprising:
- an image sensor in which a plurality of pixels are arranged in a two-dimensional array with a plurality of lines, and wherein charge accumulation and reading out of the plurality of lines are controlled per line; and
a controller configured to,in a first mode, control illumination light to illuminate a target area during a charge accumulation period for all of the plurality of lines in a first frame,generate a first captured image of the first frame,perform object detection on the first captured image,in response to detecting an object, switch to a second mode,in the second mode,identify one or more lines from the plurality of lines of the image sensor that correspond to a location of the detected object in the first captured image,for each of one or more second frames,control the illumination light to illuminate the target area during a portion of the charge accumulation period for only the identified one or more lines in the second frame,generate a second captured image of the second frame, andperform object detection on the second captured image, and,when the object is not detected for a first reference number of consecutive second frames, switch back to the first mode, and,when the object is not detected for a second reference number of consecutive first or second frames, initiate a warning,wherein the second reference number is greater than the first reference number.
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Abstract
The imaging apparatus comprises an image sensor and a controller. In the image sensor, charge accumulation and reading out in a plurality of pixels arranged in a two-dimensional array are controlled per line. The controller identifies one or more lines from lines of the image sensor to generate control information for controlling illumination light on the basis of the one or more lines identified.
31 Citations
7 Claims
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1. An imaging apparatus comprising:
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an image sensor in which a plurality of pixels are arranged in a two-dimensional array with a plurality of lines, and wherein charge accumulation and reading out of the plurality of lines are controlled per line; and a controller configured to, in a first mode, control illumination light to illuminate a target area during a charge accumulation period for all of the plurality of lines in a first frame, generate a first captured image of the first frame, perform object detection on the first captured image, in response to detecting an object, switch to a second mode, in the second mode, identify one or more lines from the plurality of lines of the image sensor that correspond to a location of the detected object in the first captured image, for each of one or more second frames, control the illumination light to illuminate the target area during a portion of the charge accumulation period for only the identified one or more lines in the second frame, generate a second captured image of the second frame, and perform object detection on the second captured image, and, when the object is not detected for a first reference number of consecutive second frames, switch back to the first mode, and, when the object is not detected for a second reference number of consecutive first or second frames, initiate a warning, wherein the second reference number is greater than the first reference number. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A control method of an imaging apparatus comprising an image sensor in which a plurality of pixels are arranged in a two-dimensional array with a plurality of lines, and wherein charge accumulation and reading out of the plurality of lines are controlled per line, the method comprising:
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in a first mode, controlling illumination light to illuminate a target area during a charge accumulation period for all of the plurality of lines in a first frame; generating a first captured image of the first frame; performing object detection on the first captured image; in response to detecting an object, switching to a second mode; in the second mode, identifying one or more lines from the plurality of lines of the image sensor that correspond to a location of the detected object in the first captured image, for each of one or more second frames, control the illumination light to illuminate the target area during a portion of the charge accumulation period for only the identified one or more lines in the second frame, generate a second captured image of the second frame, and perform object detection on the second captured image, and, when the object is not detected for a first reference number of consecutive second frames, switch back to the first mode; and
,when the object is not detected for a second reference number of consecutive first or second frames, initiate a warning, wherein the second reference number is greater than the first reference number.
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Specification