Spectral filtering for vehicular driver assistance systems
First Claim
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1. A vision system of a vehicle, said vision system comprising:
- a camera disposed behind a windshield of a vehicle equipped with said vision system, said camera comprising a lens and an imaging array;
wherein said camera views forward of the equipped vehicle and through the windshield of the equipped vehicle;
wherein said imaging array captures image data;
wherein said imaging array comprises a two dimensional array of columns and rows of photosensing pixels;
wherein said two dimensional array comprises a plurality of sub-arrays;
wherein light is imaged at said plurality of sub-arrays via said lens of said camera;
wherein a sub-array of said plurality of sub-arrays comprises a first pixel, a second pixel and a third pixel, and wherein said first pixel is adjacent to said second pixel and wherein said second pixel is adjacent to said third pixel;
a deflection microsplitting spectral filter is disposed in front of said second pixel of said sub-array;
wherein a deflection microsplitting spectral filter is not disposed in front of said first and third pixels of said sub-array;
wherein light emanating from external the equipped vehicle and passing through the windshield is incident at said lens and passes through said deflection microsplitting spectral filter and is split so that (i) light within a first spectral band is imaged at said first pixel of said sub-array, (ii) light within a second spectral band is imaged at said second pixel of said sub-array and (iii) light within a third spectral band is imaged at said third pixel of said sub-array;
a vehicle control having an image processor, wherein said image processor is operable to process image data captured by said imaging array; and
wherein, responsive at least in part to processing of captured image data by said image processor, said control is operable to control a driver assistance system of the equipped vehicle.
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Abstract
A vision system of a vehicle includes an imaging array and a spectral filter disposed at the imaging array. The imaging array includes a two dimensional array of photosensing pixels. The spectral filter includes a deflection color microsplitting configuration. The deflection microsplitting spectral filters are disposed in front of a pixel of a respective sub-array of a plurality of sub-arrays and not disposed in front of other pixels of the respective sub-array. The imaging array captures image data for use in a driver assistance system of the vehicle.
325 Citations
20 Claims
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1. A vision system of a vehicle, said vision system comprising:
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a camera disposed behind a windshield of a vehicle equipped with said vision system, said camera comprising a lens and an imaging array; wherein said camera views forward of the equipped vehicle and through the windshield of the equipped vehicle; wherein said imaging array captures image data; wherein said imaging array comprises a two dimensional array of columns and rows of photosensing pixels; wherein said two dimensional array comprises a plurality of sub-arrays; wherein light is imaged at said plurality of sub-arrays via said lens of said camera; wherein a sub-array of said plurality of sub-arrays comprises a first pixel, a second pixel and a third pixel, and wherein said first pixel is adjacent to said second pixel and wherein said second pixel is adjacent to said third pixel; a deflection microsplitting spectral filter is disposed in front of said second pixel of said sub-array; wherein a deflection microsplitting spectral filter is not disposed in front of said first and third pixels of said sub-array; wherein light emanating from external the equipped vehicle and passing through the windshield is incident at said lens and passes through said deflection microsplitting spectral filter and is split so that (i) light within a first spectral band is imaged at said first pixel of said sub-array, (ii) light within a second spectral band is imaged at said second pixel of said sub-array and (iii) light within a third spectral band is imaged at said third pixel of said sub-array; a vehicle control having an image processor, wherein said image processor is operable to process image data captured by said imaging array; and wherein, responsive at least in part to processing of captured image data by said image processor, said control is operable to control a driver assistance system of the equipped vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A vision system of a vehicle, said vision system comprising:
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a camera disposed behind a windshield of a vehicle equipped with said vision system, said camera comprising a lens and an imaging array; wherein said camera views forward of the equipped vehicle and through the windshield of the equipped vehicle; wherein said imaging array captures image data; wherein said imaging array comprises a CMOS two dimensional array of columns and rows of photosensing pixels; wherein said two dimensional array comprises a plurality of sub-arrays; wherein light is imaged at said plurality of sub-arrays via said lens of said camera; wherein a sub-array of said plurality of sub-arrays comprises a first pixel, a second pixel and a third pixel, and wherein said first pixel is adjacent to said second pixel and wherein said second pixel is adjacent to said third pixel; a deflection microsplitting spectral filter is disposed in front of said second pixel of said sub-array; wherein a deflection microsplitting spectral filter is not disposed in front of said first and third pixels of said sub-array; wherein white light emanating from external the equipped vehicle and passing through the windshield is incident at said lens and passes through said deflection microsplitting spectral filter and is split so that (i) light within a first spectral band is imaged at said first pixel of said sub-array, (ii) light within a second spectral band is imaged at said second pixel of said sub-array and (iii) light within a third spectral band is imaged at said third pixel of said sub-array; wherein said first and third spectral bands comprise a red colored spectral band and wherein said second spectral band comprises a blue-green colored spectral band; a vehicle control having an image processor, wherein said image processor is operable to process image data captured by said imaging array; and wherein, responsive at least in part to processing of captured image data by said image processor, said control is operable to control a driver assistance system of the equipped vehicle. - View Dependent Claims (12, 13, 14, 15)
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16. A vision system of a vehicle, said vision system comprising:
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a camera disposed behind a windshield of a vehicle equipped with said vision system, said camera comprising a lens and an imaging array; wherein said camera views forward of the equipped vehicle and through the windshield of the equipped vehicle; wherein said imaging array captures image data; wherein said imaging array comprises a two dimensional array of columns and rows of photosensing pixels; wherein said two dimensional array comprises a plurality of sub-arrays; wherein light is imaged at said plurality of sub-arrays via said lens of said camera; wherein a sub-array of said plurality of sub-arrays comprises a first pixel, a second pixel and a third pixel, and wherein said first pixel is adjacent to said second pixel and wherein said second pixel is adjacent to said third pixel; wherein said first, second and third pixels are linearly arranged along one of (i) a row of photosensing pixels of said imaging array and (ii) a column of photosensing pixels of said imaging array; a deflection microsplitting spectral filter is disposed in front of said second pixel of said sub-array; wherein a deflection microsplitting spectral filter is not disposed in front of said first and third pixels of said sub-array; wherein white light emanating from external the equipped vehicle and passing through the windshield is incident at said lens and passes through said deflection microsplitting spectral filter and is split so that (i) light within a first spectral band is imaged at said first pixel of said sub-array, (ii) light within a second spectral band is imaged at said second pixel of said sub-array and (iii) light within a third spectral band is imaged at said third pixel of said sub-array; a vehicle control having an image processor, wherein said image processor is operable to process image data captured by said imaging array; wherein, responsive at least in part to processing of captured image data by said image processor, said control is operable to control a driver assistance system of the equipped vehicle; and wherein said driver assistance system comprises at least one of (i) a headlamp control system of the equipped vehicle, (ii) a lane departure warning system of the equipped vehicle, (iii) an adaptive cruise control system of the equipped vehicle, (iv) a traffic sign recognition system of the equipped vehicle, (v) a forward collision warning system of the equipped vehicle, (vi) a collision mitigation braking system of the equipped vehicle, (vii) an automatic emergency braking system of the equipped vehicle, (viii) a pedestrian detection system of the equipped vehicle, (ix) an object detection system of the equipped vehicle, (x) a traffic driving control system of the equipped vehicle and (xi) a video display system of the equipped vehicle. - View Dependent Claims (17, 18, 19, 20)
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Specification