Systems and methods use cameras to provide autonomous navigation features. In one implementation, a driver assist navigation system for a primary vehicle may include at least one image capture device configured to acquire a plurality of images of an area in a vicinity of the primary vehicle; a data
Systems and methods use cameras to provide autonomous navigation features. In one implementation, a driver assist navigation system for a primary vehicle may include at least one image capture device configured to acquire a plurality of images of an area in a vicinity of the primary vehicle; a data interface; and at least one processing device. The at least processing device may be configured to: receive the plurality of images via the data interface; identify a target object within the plurality of images; monitor, via the plurality of images, a motion of the target object and a distance between the primary vehicle and the target object; determine an indicator of an intercept time between the primary vehicle and the target object based on the monitored motion and the distance between the primary vehicle and the target object; and cause a response in the primary vehicle based on a comparison of the intercept time to a plurality of predetermined intercept thresholds.
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1. A driver assist navigation system for a primary vehicle, the system comprising: at least one camera configured to acquire a plurality of images of an area in a vicinity of the primary vehicle;a data interface; andat least one processing device configured to: receive the plurality of images via th
1. A driver assist navigation system for a primary vehicle, the system comprising: at least one camera configured to acquire a plurality of images of an area in a vicinity of the primary vehicle;a data interface; andat least one processing device configured to: receive the plurality of images via the data interface;identify a target object within the plurality of images;monitor, via the plurality of images, a motion of the target object and a distance between the primary vehicle and the target object;determine an indicator of an intercept time between the primary vehicle and the target object based on the monitored motion and the monitored distance between the primary vehicle and the target object; andcause a response in the primary vehicle based on a comparison of the indicator of the intercept time to a plurality of predetermined intercept thresholds,wherein the response is based on an average motion of the target object if the indicator of the intercept time exceeds one or more of the predetermined intercept thresholds, and the response is based on actual motion of the target object if the indicator of the intercept time does not exceed the one or more predetermined intercept thresholds. 2. The driver assist navigation system of claim 1, wherein the target object is a target vehicle traveling in a lane different from the primary vehicle. 3. The driver assist navigation system of claim 1, wherein the intercept time is based on an indicator of speed of the tracked object, as determined based on the plurality of images. 4. The driver assist navigation system of claim 1, wherein the intercept time is based on an indicator of an acceleration of the tracked object, as determined based on the plurality of images. 5. The driver assist navigation system of claim 1, wherein the at least one processing device is further configured to: determine whether the target object is traveling in the same lane as the primary vehicle; andforego the response in the primary vehicle if the target object is determined to be traveling in a lane different from the primary vehicle. 6. The driver assist navigation system of claim 5, wherein determination of whether the target object is traveling in the same lane as the primary vehicle is based on the plurality of images. 7. The driver assist navigation system of claim 5, wherein determination of whether the target object is traveling in the same lane as the primary vehicle is based on at least one of predetermined map data or yaw rate of the primary vehicle. 8. The driver assist navigation system of claim 1, wherein the response includes an emergency avoidance action if the indicator of intercept time to the target object does not exceed at least a second intercept threshold among the plurality of predetermined intercept thresholds. 9. The driver assist navigation system of claim 8, wherein the emergency avoidance action includes changing lanes. 10. The driver assist navigation system of claim 8, wherein the emergency avoidance action includes emergency braking. 11. A primary vehicle, comprising: a body;at least one camera configured to acquire a plurality of images of an area in a vicinity of the primary vehicle;a data interface; andat least one processing device configured to: receive the plurality of images via the data interface;identify a target object within the plurality of images;monitor, via the plurality of images, a motion of the target object and a distance between the primary vehicle and the target object;determine an indicator of an intercept time between the primary vehicle and the target object based on the monitored motion and the monitored distance between the primary vehicle and the target object; andcause a response in the primary vehicle based on a comparison of the indicator of the intercept time to a plurality of predetermined intercept thresholds,wherein the response is based on an average motion of the target object if the indicator of the intercept time exceeds one or more of the predetermined intercept thresholds, and the response is based on actual motion of the target object if the indicator of the intercept time does not exceed the one or more predetermined intercept thresholds. 12. The primary vehicle of claim 11, wherein the target object is a target vehicle traveling in a lane different from the primary vehicle. 13. The primary vehicle of claim 11, wherein the intercept time is based on an indicator of speed of the tracked object, as determined based on the plurality of images. 14. The primary vehicle of claim 11, wherein the intercept time is based on an indicator of an acceleration of the tracked object, as determined based on the plurality of images. 15. The primary vehicle of claim 11, wherein the at least one processing device is further configured to: determine whether the target object is traveling in the same lane as the primary vehicle; andforego the response in the primary vehicle if the target object is determined to be traveling in a lane different from the primary vehicle. 16. The primary vehicle of claim 15, wherein determination of whether the target object is traveling in the same lane as the primary vehicle is based on the plurality of images. 17. The primary vehicle of claim 15, wherein determination of whether the target object is traveling in the same lane as the primary vehicle is based on at least one of predetermined map data or yaw rate of the primary vehicle. 18. The primary vehicle of claim 11, wherein the response includes an emergency avoidance action if the indicator of intercept time to the target object does not exceed at least a second intercept threshold among the plurality of redetermined intercept thresholds. 19. The primary vehicle of claim 18, wherein the emergency avoidance action includes changing lanes. 20. The primary vehicle of claim 18, wherein the emergency avoidance action includes emergency braking. 21. A method for navigating a primary vehicle, the method comprising: acquiring, via at least one camera, a plurality of images of an area in a vicinity of the primary vehicle;identifying a target object within the plurality of images;monitoring, based on the plurality of images, a motion of the target object and a distance between the primary vehicle and the target object;determining an indicator of an intercept time between the primary vehicle and the target object based on the monitored motion and the monitored distance between the primary vehicle and the target object; andcausing a response in the primary vehicle based on a comparison of the indicator of the intercept time to a plurality of predetermined intercept thresholds,wherein the response is based on an average motion of the target object if the indicator of the intercept time exceeds one or more of the predetermined intercept thresholds, and the response is based on actual motion of the target object if the indicator of the intercept time does not exceed the one or more predetermined intercept thresholds.
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