Overhead scanner device, image acquiring method, and computer-readable recording medium
AssigneePfu Limited
InventorsSatoshi KUBO, Yuki Kasahara
Life of this patent
Estimating the term…
Abstract
An overhead scanner device includes an area sensor, a linear sensor, and a control unit, wherein the control unit includes an area-image acquiring unit that controls the area sensor to successively acquire a plurality of images, a feature-point extracting unit that extracts feature points from the images acquired by the area-image acquiring unit, a velocity-vector computing unit that computes a velocity vector of each of the feature points by comparing the feature points extracted by the feature-point extracting unit between the images, and a read-start determining unit that determines a read start by the linear sensor, based on the velocity vector computed by the velocity-vector computing unit.
Claims11
An overhead scanner device comprising:
- an area sensor;
- a linear sensor;
- and
- a control unit, wherein
- the control unit includes
- an area-image acquiring unit that controls the area sensor to successively acquire a plurality of images;
- a feature-point extracting unit that extracts feature points from the images acquired by the area-image acquiring unit;
- a velocity-vector computing unit that computes a velocity vector of each of the feature points by comparing the feature points extracted by the feature-point extracting unit between the images;
- and
- a read-start determining unit that determines a read start by the linear sensor, based on the velocity vector computed by the velocity-vector computing unit.
An image acquiring method executed by an overhead scanner device including an area sensor, a linear sensor, and a control unit, wherein
- the method executed by the control unit comprising
- an area-image acquiring step of controlling the area sensor to successively acquire a plurality of images;
- a feature-point extracting step of extracting feature points from the images acquired at the area-image acquiring step;
- a velocity-vector computing step of computing a velocity vector of each of the feature points by comparing the feature points extracted at the feature-point extracting step between the images;
- and
- a read-start determining step of determining a read start by the linear sensor, based on the velocity vector computed at the velocity-vector computing step.
A computer-readable recording medium that stores therein a computer program for an overhead scanner device including an area sensor, a linear sensor, and a control unit, the computer program causing the control unit to execute:
- an area-image acquiring step of controlling the area sensor to successively acquire a plurality of images;
- a feature-point extracting step of extracting feature points from the images acquired at the area-image acquiring step;
- a velocity-vector computing step of computing a velocity vector of each of the feature points by comparing the feature points extracted at the feature-point extracting step between the images;
- and
- a read-start determining step of determining a read start by the linear sensor, based on the velocity vector computed at the velocity-vector computing step.
Dependencies are inferred from the claim text.