Driving system and method to prevent glare thereof
A driving system is in a vehicle and includes a camera sensing an image in front of the vehicle, first and second controllers, and a light controller. The first controller is connected to the camera and identifies same- and oncoming-direction vehicles in the image. The light controller is at a windshield of the vehicle. The second controller is connected to the first controller and the light controller, analyzes the image, when a brightness is greater than or equal to a brightness threshold in an oncoming-direction vehicle position of a camera view of the oncoming-direction vehicle, converts a high-brightness position of the camera view with the brightness greater than or equal to the brightness threshold into a high-brightness position of a driving view, and controls the light controller to reduce light transmittance at the high-brightness position of the driving view. A method to prevent glare in a driving system is provided.
1. A driving system, configured to be disposed in a vehicle, comprising:
a camera configured to sense an image in front of the vehicle;
a first controller electrically connected to the camera and configured to identify a same-direction vehicle and an oncoming-direction vehicle in the image;
a light controller configured to be disposed at a windshield of the vehicle; and
a second controller electrically connected to the first controller and the light controller,
wherein the second controller analyzes the image, and when a brightness is greater than or equal to a brightness threshold in an oncoming-direction vehicle position of a camera view of the oncoming-direction vehicle, coordinately converts a high-brightness position of the camera view with the brightness greater than or equal to the brightness threshold into a high-brightness position of a driving view, and then controls the light controller to reduce a light transmittance at the high-brightness position of the driving view,
wherein the light controller comprises p×q sub-light controllers, wherein p≥2, and q≥2,
wherein the second controller divides the image into p×q sub-images, and then controls the sub-light controller corresponding to the sub-image with a light intensity standard deviation greater than the brightness threshold to reduce a light transmittance when the light intensity standard deviation in the sub-images is greater than the brightness threshold,
wherein:
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wherein in each of the sub-images, σ is the light intensity standard deviation, b(x,y) is a light intensity of each pixel position, m is an average light intensity, and n×m is a sum of pixel quantity.
2. The driving system of claim 1 , further comprising:
a head-up display electrically connected to the second controller,
wherein the second controller coordinately converts a same-direction vehicle position of a camera view and an oncoming-direction vehicle position of the camera view of the same-direction vehicle and the oncoming-direction vehicle into a same-direction vehicle position of a driving view and an oncoming-direction vehicle position of the driving view, and then controls the head-up display to project a sign of the same-direction vehicle and the oncoming-direction vehicle at the same-direction vehicle position of the driving view and the oncoming-direction vehicle position of the driving view at the windshield.
3. The driving system of claim 1 , wherein the second controller binarizes the image, and then determines whether a brightness is greater than or equal to the brightness threshold in the oncoming-direction vehicle position of the camera view of the oncoming-direction vehicle.
4. The driving system of claim 1 , wherein the light controller is an electrochromic layer or an electrochromic glass.
5. A method to prevent glare in a driving system, comprising:
sensing an image in front of a vehicle;
identifying a same-direction vehicle and an oncoming-direction vehicle in the image; and
analyzing the image, and when a brightness is greater than or equal to a brightness threshold in an oncoming-direction vehicle position of a camera view of the oncoming-direction vehicle, coordinately converting a high-brightness position of the camera view with the brightness greater than or equal to the brightness threshold into a high-brightness position of a driving view, and then controlling a light controller to reduce a light transmittance at the high-brightness position of the driving view,
wherein the step of analyzing the image, and when the brightness is greater than or equal to the brightness threshold in the oncoming-direction vehicle position of the camera view of the oncoming-direction vehicle, coordinately converting the high-brightness position of the camera view with the brightness greater than or equal to the brightness threshold into the high-brightness position of the driving view, and then controlling the light controller to reduce the light transmittance at the high-brightness position of the driving view comprises:
dividing the image into p×q sub-images, and then controlling the sub-light controller corresponding to the sub-image with a light intensity standard deviation greater than the brightness threshold to reduce a light transmittance when the light intensity standard deviation in the sub-images is greater than the brightness threshold,
wherein:
σ
=
∑
x
=
1
,
y
=
1
n
,
m
(
b
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x
,
y
)
-
m
¯
)
2
n
m
,
m
¯
=
∑
x
=
1
,
y
=
1
n
,
m
b
(
x
,
y
)
n
m
,
wherein in each of the sub-images, σ is the light intensity standard deviation, b(x,y) is a light intensity of each pixel position, m is an average light intensity, and n×m is a sum of pixel quantity.
6. The method to prevent glare in the driving system of claim 5 , further comprising:
coordinately converting a same-direction vehicle position of a camera view and an oncoming-direction vehicle position of the camera view of the same-direction vehicle and the oncoming-direction vehicle into a same-direction vehicle position of a driving view and an oncoming-direction vehicle position of the driving view, and then controlling a head-up display to project a sign of the same-direction vehicle and the oncoming-direction vehicle at the same-direction vehicle position of the driving view and the oncoming-direction vehicle position of the driving view at a windshield.
7. The method to prevent glare in the driving system of claim 5 , wherein the step of analyzing the image, and when the brightness is greater than or equal to the brightness threshold in the oncoming-direction vehicle position of the camera view of the oncoming-direction vehicle, coordinately converting the high-brightness position of the camera view with the brightness greater than or equal to the brightness threshold into the high-brightness position of the driving view, and then controlling the light controller to reduce the light transmittance at the high-brightness position of the driving view comprises:
binarizing the image, and then determining whether a brightness is greater than or equal to the brightness threshold in the oncoming-direction vehicle position of the camera view of the oncoming-direction vehicle.