Method and system for 2D detection of localized light contributions
First Claim
1. A detection system for determining whether a light contribution of a first light source of an illumination system is present at a selected position within a scene;
- wherein the light contribution of the first light source includes a first embedded code comprising a repeating first sequence of N symbols, the detection system comprising;
a camera configured to acquire a series of images of the scene, wherein;
each acquired image includes a plurality of pixels, each pixel representing an intensity of a total light output of the illumination system at a different physical position within the scene and the total light output of the illumination system comprising at least the light contribution of the first light source,the series comprises at least N different images, andeach image of the at least N different images is acquired with a total exposure time comprising one or more exposure instances at different temporal positions within the repeating first sequence of N symbols; and
a processing unit configured to process the acquired series of images to determine that the light contribution of the first light source is present at the selected physical position.
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Accused Products
Abstract
The invention relates to a detection system for determining whether a light contribution of a light source is present at a selected position within a 2D scene. The light contribution includes an embedded code comprising a repeating sequence of N symbols. The detection system includes a camera and a processing unit. The camera is configured to acquire a series of images of the scene via specific open/closure patterns of the shutter. Each image includes a plurality of pixels, each pixel representing an intensity of the light output of the light source at a different physical position within the scene. The processing unit is configured to process the acquired series of images to determine whether the light contribution of the first light source is present at the selected physical position within the scene by e.g. correlating a sequence of pixels of the acquired series corresponding to the selected physical position with the first sequence of N symbols.
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Citations
14 Claims
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1. A detection system for determining whether a light contribution of a first light source of an illumination system is present at a selected position within a scene;
- wherein the light contribution of the first light source includes a first embedded code comprising a repeating first sequence of N symbols, the detection system comprising;
a camera configured to acquire a series of images of the scene, wherein; each acquired image includes a plurality of pixels, each pixel representing an intensity of a total light output of the illumination system at a different physical position within the scene and the total light output of the illumination system comprising at least the light contribution of the first light source, the series comprises at least N different images, and each image of the at least N different images is acquired with a total exposure time comprising one or more exposure instances at different temporal positions within the repeating first sequence of N symbols; and a processing unit configured to process the acquired series of images to determine that the light contribution of the first light source is present at the selected physical position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- wherein the light contribution of the first light source includes a first embedded code comprising a repeating first sequence of N symbols, the detection system comprising;
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11. A detection system for determining whether a light contribution of a first light source of an illumination system is present within a first part of a scene, wherein the light contribution of the first light source includes a first embedded code comprising a repeating first sequence of N symbols, the detection system comprising:
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a camera configured to acquire a series of images of the scene, wherein; each acquired image includes a plurality of pixels, each pixel representing an intensity of a total light output of the illumination system at a different physical position within the scene and the total light output of the illumination system comprising at least the light contribution of the first light source, the series comprises at least N different images, and each image of the at least N different images is acquired with a total exposure time comprising one or more exposure instances at different temporal positions within the repeating first sequence of N symbols; and a processing unit configured to; for each acquired image, determine a sum of the pixels included in a part of the image corresponding to the first part of the scene, correlate a sequence of the sums of the acquired series of images with the first sequence of N symbols, and determine that the light contribution of the first light source is present within the first part of the scene when the correlation of the sequence of the image sums of the acquired series of images with the first sequence of N symbols produces at least one correlation peak above a first threshold value.
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12. A method for determining whether a light contribution of a first light source of an illumination system is present at a selected position within a scene, wherein the light contribution of the first light source includes a first embedded code comprising a repeating first sequence of N symbols, the method comprising:
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acquiring a series of images of the scene, wherein; each acquired image includes a plurality of pixels, each pixel representing an intensity of a total light output of the illumination system at a different physical position within the scene and the total light output of the illumination system comprising at least the light contribution of the first light source, the series comprises at least N different images, and each image of the at least N different images is acquired with a total exposure time comprising one or more exposure instances at different temporal positions within the repeating first sequence of N symbols; and processing the acquired series of images to determine that the light contribution of the first light source is present at the selected physical position. - View Dependent Claims (13)
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14. A method for determining whether a light contribution of a first light source of an illumination system is present within a first part of a scene, wherein the light contribution of the first light source includes a first embedded code comprising a repeating first sequence of N symbols, the method comprising:
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acquiring a series of images of the scene, wherein; each acquired image includes a plurality of pixels, each pixel representing an intensity of a total light output of the illumination system at a different physical position within the scene and the total light output if the illumination system comprising at least the light contribution of the first light source, the series comprises at least N different images, and each image of the at least N different images is acquired with a total exposure time comprising one or more exposure instances at different temporal positions within the repeating first sequence of N symbols; for each acquired image, determining a sum of the pixels included in a part of the image corresponding to the first part of the scene; correlating a sequence of the sums of the acquired series of images with the first sequence of N symbols; and determining that the light contribution of the first light source is present within the first part of the scene when the correlation of the sequence of the image sums of the acquired series of images with the first sequence of N symbols produces at least one correlation peak above a first threshold value.
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Specification