Method of displaying shot image on car reverse video system
First Claim
1. A method of displaying a shot image on a car reverse video system, executed in a car reverse video system, for automatically calibrating a displaying angle of an image shot by a photographic lens with a fixed shooting angle, comprising:
- shooting a scene image behind the car through using the lens;
activating a distance detector to detect a distance from an obstacle behind the car;
determining if the distance from the obstacle is smaller than a preset distance;
if yes, setting a scaling ratio according to an equation below;
Scaling Ratio=preset distance/distance between the car and the obstacle;
adjusting pixel pitches of the scene image according to the scaling ratio and distances between a reference point and all pixels in the scene image to produce an adjusted scene image; and
displaying the adjusted scene image on the car reverse video system.
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Abstract
A method of displaying a shot image on a car reverse video system is described, which is applicable for adjusting an image displaying angle of the car reverse video system with a fixed lens according to a distance from an obstacle. Firstly, a scene image behind the car is shot through using the lens. Then, a distance detector is activated to detect a distance from the obstacle behind the car. If the distance from the obstacle is smaller than a preset distance, a scaling ratio is set according to a ratio of the preset distance to the distance from the obstacle. Finally, according to the scaling ratio and a distance between each pixel in the scene image and a reference point, all pixel pitches are adjusted, such that the scene image is deformed, and thus achieving an effect of switching a viewing angle of the scene image.
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Citations
5 Claims
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1. A method of displaying a shot image on a car reverse video system, executed in a car reverse video system, for automatically calibrating a displaying angle of an image shot by a photographic lens with a fixed shooting angle, comprising:
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shooting a scene image behind the car through using the lens; activating a distance detector to detect a distance from an obstacle behind the car; determining if the distance from the obstacle is smaller than a preset distance; if yes, setting a scaling ratio according to an equation below;
Scaling Ratio=preset distance/distance between the car and the obstacle;adjusting pixel pitches of the scene image according to the scaling ratio and distances between a reference point and all pixels in the scene image to produce an adjusted scene image; and displaying the adjusted scene image on the car reverse video system. - View Dependent Claims (2, 3, 4, 5)
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Specification