Image acquisition system and method for distance determination using an image recording system
AssigneeRobert Bosch GmbH
InventorsKarsten Muehlmann, Alexander Wuerz-Wessel
Life of this patent
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Abstract
A vehicle-based image acquisition system having an image sensor that has a characteristic curve assembled from linear segments. The system includes an arrangement for determining the distance of luminous objects imaged by the image sensor.
Claims20
A method for determining the distance between an image acquisition system encompassing an image sensor and a luminous object moving relative to the image acquisition system, the method comprising:
- generating, using the image sensor, an image of surroundings of the image sensor encompassing a luminous object;
- after the image has been generated, selecting at least one luminous object of interest from the image generated by the image sensor;
- for the selected luminous object, sensing a tailing of the image of the selected luminous object, where tailing occurs as a consequence of control properties of the image sensor and a relative velocity between the image sensor and the luminous object;
- and
- associating a magnitude of the tailing with a distance value;
- wherein from an acquisition time interval of the images of the sensor, and from a change in a relative size of the object in the image, a time to adjacency is determined based on an acquisition time interval of the images and a scale change.
A method for determining the distance between an image acquisition system encompassing an image sensor and a luminous object moving relative to the image acquisition system, the method comprising:
- generating, using the image sensor, an image of surroundings of the image sensor encompassing a luminous object;
- selecting a luminous object of interest from the image generated by the image sensor;
- for the selected object, sensing a tailing of the image of the luminous object, which tailing occurs as a consequence of control properties of the image sensor and a relative velocity between the image sensor and the luminous object;
- and
- associating a magnitude of the tailing with a distance value;
- wherein from an acquisition time interval of the images of the sensor, and from a change in a relative size of the object in the image, a time to adjacency is determined according to the following equation:
- tta=Δt/(sc−1.0),
- where
- tta=time to adjacency;
- Δt=acquisition time interval of the images;
- sc=scale change (change in relative size of the object in the image).
An image acquisition system for determining the distance to a luminous object moving relative to the image acquisition system, comprising:
- an image sensor for generating an image of surroundings of the image sensor encompassing a luminous object and selecting at least one luminous object of interest from the generated image after the image has been generated;
- wherein for the selected luminous object, a tailing of the image of the selected luminous object, where tailing occurs as a consequence of control properties of the image sensor and a relative velocity between the image sensor and the luminous object is sensed, and
- wherein a magnitude of the tailing is associated with a distance value;
- wherein from an acquisition time interval of the images of the sensor, and from a change in a relative size of the object in the image, a time to adjacency is determined based on an acquisition time interval of the images and a scale change.
An image acquisition system for determining the distance to a luminous object moving relative to the image acquisition system, comprising:
- an image sensor for generating an image of surroundings of the image sensor encompassing a luminous object and selecting a luminous object of interest from the generated image;
- wherein for the selected object, a tailing of the image of the luminous object, which tailing occurs as a consequence of control properties of the image sensor and a relative velocity between the image sensor and the luminous object is sensed,
- wherein a magnitude of the tailing is associated with a distance value, and
- wherein from an acquisition time interval of the images of the sensor, and from a change in a relative size of the object in the image, a time to adjacency is determined according to the following equation:
- tta=Δt/(sc−1.0), where tta=time to adjacency, Δt=acquisition time interval of the images;
- and sc=scale change (change in relative size of the object in the image).
Dependencies are inferred from the claim text.