Projection indication devices and methods
AssigneeAsia Optical Co., Inc.
InventorsChih-Hsuan Lee, Kei Poon
Life of this patent
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Abstract
A projection indication device includes an image capturing unit, a detection unit, a processing unit, and a projection unit. The image capturing unit acquires an image of a corresponding field. The detection unit detects a field state corresponding to the field and detects a target distance of a first object within the field state. The processing unit, using a calculation module based on the image, determines a first position of the first object and a second position of a second object within the image, and calculates a result based on the first position, the second position, and the target distance. The projection unit projects the result as a projection image onto the field. The length of the projection image varies according to the target distance.
Claims20
A projection indication device, comprising:
- an image capturing unit for acquiring an image of a corresponding field;
- a detection unit for detecting a field state corresponding to the field and detecting a target distance of a first object in the corresponding field state;
- a processing unit for determining, using a calculation module based on the image, a first position of the first object and a second position of a second object in the image, and calculating a result based on the first position of the first object, the second position of the second object, and the target distance;
- and
- a projection unit for projecting the result as a projection image onto the field,
- wherein, a length of the projection image varies according to the target distance, the result includes a direction and the length of the projection image, and the length of the projection image is positively correlated or proportional to the target distance.
A projection indication device, comprising:
- an image capturing unit for acquiring an image of a corresponding field;
- a detection unit for detecting a field state corresponding to the field and detecting a target distance of a first object in the corresponding field state;
- a processing unit for determining, using a calculation module based on the image, a first position of the first object and a second position of a second object in the image, and calculating a result based on the first position of the first object, the second position of the second object, and the target distance;
- a projection unit for projecting the result as a projection image onto the field,
- wherein a length of the projection image varies according to the distance, and the projection indication device meets at least one of the following conditions:
- 1
- ≦
- LDF
- /
- CF
- ≦
- 2
- ;
- 92
- ≦
- (
- LDP
- ×
- LDW
- )
- /
- V
- ≦
- 420
- ;
- 0.7
- ≦
- PF
- /
- CF
- ≦
- 1.5
- ,
- where LDF is any field of view of the detection unit, CF is any field of view of the image capturing unit, LDP is a pixel value of the detection unit, LDW is a weight of the detection unit, V is a volume of the projection indication device, and PF is any field of view of the projection unit.
A projection indication method, comprising:
- acquiring an image of a corresponding field using an image capturing unit;
- detecting a field state, and a target distance to a first object within the field state using a detection unit;
- determining a first position of the first object and a second position of a second object within the image using a calculation module based on the image;
- calculating a result comprising a length of a projection image based on the first position of the first object, the second position of the second object, and the target distance;
- adjusting a length of the projection image based on the target distance;
- and
- using a projection unit to project based on the result to display the projection image, wherein the projection unit includes a light source emitting visible light to project the projection image between the first position 14 and the second position in the field,
- and the projection indication device meets at least one of the following conditions:
- 1
- ≦
- LDF
- /
- CF
- ≦
- 2
- ;
- 92
- ≦
- (
- LDP
- ×
- LDW
- )
- /
- V
- ≦
- 420
- ;
- 0.7
- ≦
- PF
- /
- CF
- ≦
- 1.5
- 967.9
- ≦
- (
- (
- CW
- ×
- PW
- )
- /
- MV
- )
- +
- PF
- ≦
- 1607.9
- ,
- where LDF is any field of view of the detection unit, CF is any field of view of the image capturing unit, LDP is a pixel value of the detection unit, LDW is a weight of the detection unit, Vis a volume of the projection indication device, PF is any field of view of the projection unit, CW is a weight of the image capturing unit, PW is a weight of the projection unit, and MV is a volume of a light deflector.
Dependencies are inferred from the claim text.