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US 7,480,397 B2Granted
Fingerprint image reading apparatus
AssigneeCasio Computer Co., Ltd.
InventorHiroyasu Ide
Life of this patent
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AssigneeCasio Computer Co., Ltd.
InventorHiroyasu Ide
Estimating the term…
An image reading apparatus which reads a fingerprint image, includes a roller rotatably mounted to the image reading apparatus, a given pattern being printed on part of an outer surface of the roller in a circumferential direction, a line sensor including a plurality of image pickup elements which read a fingerprint image from a finger that touches with the roller as well as the pattern printed on the roller, a generating unit which generates a reference value to each of the image pickup elements corresponding to part of the line sensor, which reads the pattern, based on image data of the pattern, a rotation sensing image extracting unit which extracts a rotation sensing image based on the reference value, and a determination unit which determines capture timing of the fingerprint image based on variations in the rotation sensing image.
A fingerprint image processing apparatus comprising:
A method of processing fingerprint image data, which is captured by a line sensor that includes a plurality of image pickup elements, and each pixel of the fingerprint image data having a multilevel pixel value, the method comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Reading arrangements: arrangements for reading an image from an unusual original, e.g. 3-dimensional objects
Based on the shapes or appearances of their bodies or parts thereof: using fingerprinting
Sensors therefor: by using geometrical optics, e.g. using prisms
Fingerprints or palmprints: combining adjacent partial images to create a composite input or reference pattern; Tracking a sweeping finger movement
Term ended 30 Aug 2026 (estimated)
This application is based upon and claims the benefit of priority from prior Japanese Patent Applications No. 2003-114831, filed Apr. 18, 2003; and No. 2003-159657, filed Jun. 4, 2003, the entire contents of both of which are incorporated herein by reference.
1. Field of the Invention
The present invention relates to an image reading apparatus for reading fingerprint image data.
FIG. 1 is a block diagram of an electronic circuit of a mobile phone with a fingerprint reading apparatus according to an embodiment of the present invention.
FIG. 2 is an external view of the mobile phone.
FIG. 3 is a schematic sectional view of a mechanical section of the fingerprint reading apparatus according to the embodiment of the present invention.
FIG. 1 is a block diagram of an electronic circuit of a mobile phone with an image reading apparatus according to an embodiment of the present invention.
The mobile phone has a computer which reads programs recorded on a recording medium and whose operation is controlled by the programs. It includes a CPU 10, a storage unit 12, a RAM 14, a communication unit 16, a display unit 18, a key unit 19 and a fingerprint reading unit 20. The CPU 10 is connected to these units through buses. The fingerprint reading unit 20 reads an image of a fingerprint of a user's fingertip as a subject.
The CPU 10 executes programs stored in a program area of the RAM 14 to fulfill various functions. It not only controls the functions of the mobile phone but also controls the fingerprint reading unit 20 to read image data of a fingerprint and performs various processes for the image data.