Lamp detection device and lamp detection method
First Claim
Patent Images
1. A lamp detection device comprising:
- an image shooting unit mounted on a vehicle and configured to acquire a camera image by shooting an image around the vehicle;
an edge detection circuit configured to detect an edge portion from the camera image, the edge portion having a luminance difference equal to or above a predetermined value;
an edge smoothing circuit configured to generate a smoothed image by diminishing the luminance difference between adjacent pixels at the edge portion;
a synchronized pixel extraction circuit configured to extract synchronized pixels from the smoothed image, the synchronized pixels having luminances varying synchronously with an alternating current cycle of power supplied to a lamp; and
a lamp detection circuit configured to detect the lamp from the synchronized pixels.
1 Assignment
0 Petitions
Accused Products
Abstract
A lamp detection device detects an edge portion from a camera image, the edge portion having a luminance difference equal to or above a predetermined value, and generates a smoothed image by diminishing the luminance difference of the edge portion. Then, the lamp detection device extracts synchronized pixels from the smoothed image, the synchronized pixels having luminances varying synchronously with an alternating current cycle of power supplied to a lamp, and detects the lamp from the synchronized pixels.
-
Citations
4 Claims
-
1. A lamp detection device comprising:
-
an image shooting unit mounted on a vehicle and configured to acquire a camera image by shooting an image around the vehicle; an edge detection circuit configured to detect an edge portion from the camera image, the edge portion having a luminance difference equal to or above a predetermined value; an edge smoothing circuit configured to generate a smoothed image by diminishing the luminance difference between adjacent pixels at the edge portion; a synchronized pixel extraction circuit configured to extract synchronized pixels from the smoothed image, the synchronized pixels having luminances varying synchronously with an alternating current cycle of power supplied to a lamp; and a lamp detection circuit configured to detect the lamp from the synchronized pixels. - View Dependent Claims (2, 3)
-
-
4. A lamp detection method comprising:
-
acquiring a camera image by shooting an image around a vehicle while using an image shooting unit mounted on the vehicle; detecting an edge portion from the camera image, the edge portion having a luminance difference equal to or above a predetermined value; generating a smoothed image by diminishing the luminance difference between adjacent pixels at the edge portion; extracting synchronized pixels from the smoothed image, the synchronized pixels having luminances varying synchronously with an alternating current cycle of power supplied to a lamp; and detecting the lamp from the synchronized pixels.
-
Specification