Single-Camera Distance Ranging Method and System
First Claim
1. A single-camera distance ranging method, comprising:
- a displaying and inputting step;
a camera of a mobile terminal acquiring an image which contains a target object and displaying the image on a screen, and receiving a selection of the target object by a user;
a tracking step;
during a translation of the mobile terminal towards the target object, recognizing and tracking the target object;
a recording step;
recording a translation distance of the mobile terminal and a ratio of a display width of the target object before the translation of the mobile terminal to a display width of the target object after the translation of the mobile terminal; and
a calculating step;
based on data recorded in the recording step, calculating a distance between the mobile terminal and the target object.
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Accused Products
Abstract
Disclosed are a method and system for single-camera distance ranging. When a mobile terminal is in camera filming mode, the outer edge of a target object is continuously recognized and tracked. A user orients the mobile terminal toward the target object and moves said terminal laterally; the mobile terminal calculates the distance between the mobile terminal and the target object according to the change in the display width of the target object on a screen or the change in the framing width on a mobile terminal screen and the lateral-shift distance of the mobile terminal. The whole ranging process is completed based on the existing mobile terminal image processing and movement perception functions, thereby making possible single-camera ranging from a mobile terminal with no requirement for additional optical component. Ranging accuracy can be further enhanced with the addition of a posture-monitoring step during the lateral movement of the mobile terminal.
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Citations
10 Claims
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1. A single-camera distance ranging method, comprising:
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a displaying and inputting step;
a camera of a mobile terminal acquiring an image which contains a target object and displaying the image on a screen, and receiving a selection of the target object by a user;a tracking step;
during a translation of the mobile terminal towards the target object, recognizing and tracking the target object;a recording step;
recording a translation distance of the mobile terminal and a ratio of a display width of the target object before the translation of the mobile terminal to a display width of the target object after the translation of the mobile terminal; anda calculating step;
based on data recorded in the recording step, calculating a distance between the mobile terminal and the target object. - View Dependent Claims (2, 3, 4, 5)
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6. A single-camera distance ranging system, located on a mobile terminal, comprising:
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a displaying and inputting component;
configured to acquire an image which contains a target object by a camera of a mobile terminal and display the image on a screen; and
receive a selection of the target object by a user;a tracking component;
configured to recognize and track the target object during a translation of the mobile terminal towards the target object;a recording component;
configured to record a translation distance of the mobile terminal and a ratio of a display width of the target object before the translation of the mobile terminal to a display width of the target object after the translation of the mobile terminal; anda calculating component;
configured to calculate a distance between the mobile terminal and the target object based on data recorded in the recording component. - View Dependent Claims (7, 8, 9, 10)
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Specification