摘要:
An optical identification method, includes: projecting light on a finger to generate reflected light from the finger; receiving the reflected light by a pixel sensing array to obtain a plurality of finger images; and determining whether the finger images present a liveness characteristic, according to a required exposure time or average brightness of the finger images obtained by the pixel sensing array. When the finger images present the liveness characteristic, the optical identification method further includes: determining identification information according to the finger images; or when the finger images do not present the liveness characteristic, the optical identification method further includes: not determining identification information according to the finger images, and optionally, stopping the pixel sensing array from obtaining a subsequent finger image.
摘要:
A fingerprint detection apparatus, a mobile device using the same and a manufacturing method thereof are provided. The fingerprint detection apparatus comprises an image sensing integrated circuit and a spatial filter disposed on the image sensing integrated circuit. The spatial filter has adjacent light tunnels for restricting an incident angle of light to the image sensing integrated circuit to prevent scattered light from entering the image sensing integrated circuit.
摘要:
The present invention provides an image brightness non-uniformity correction method and an image brightness correction device therefor. The image brightness non-uniformity correction method includes the steps of: (A) generating an initial input image having pixels arranged in a matrix, wherein each pixel has a corresponding pixel brightness and the initial input image has non-uniform brightness; (B) performing a pre-processing procedure on the initial input image, to generate a pre-processed image; (C) performing an image gradient correction procedure on the pre-processed image, to eliminate non-uniformity of the brightness of the initial input image; and (D) outputting an output image having an uniformity-processed brightness.
摘要:
An exposure time determination method for image sensing operation includes: providing a first stage exposure condition which includes a first exposure time; sensing an image according to the first stage exposure condition to generate a first histogram which has a first histogram brightness maximum, a first histogram brightness minimum, and a first histogram width; increasing or decreasing the first exposure time to a second exposure time as a second stage exposure condition, and sensing the image according to the second stage exposure condition to generate a second histogram which has a second histogram brightness maximum, a second histogram brightness minimum, and a second histogram width; comparing the first histogram width with the second histogram width to generate a comparison result, and determining a third exposure time to be a third stage exposure condition according to the comparison result; and sensing the image according to the third stage exposure condition.
摘要:
A parameter control method for an integrated circuit and an integrated circuit using the same are provided. The method includes the steps of: providing a correspondence between 1st to Nth impedance groups and 1st to Nth first settings, wherein each impedance group includes K sub impedances; providing a correspondence between 1st to Kth sub-impedance and 1st to Kth second settings; detecting an impedance from a specific pin of the integrated circuit; comparing an impedance detected from the specific pin of the integrated circuit with the 1st to Nth impedance sets to find a corresponding specific impedance set to select a specific first setting; comparing the impedance detected from the specific pin of the integrated circuit with the 1st to Kth sub-impedance of the specific impedance set to select a specific second setting; and operating the integrated circuit according to the specific first setting and the specific second setting.
摘要:
A fingerprint identification device with supplementary light source and a mobile device using the same are provided in the present invention. The fingerprint identification device includes a substrate, an image sensing integrated circuit and a specific wavelength light-emitting diode (LED). The image sensing integrated circuit disposed on the substrate receives a fingerprint image. The specific wavelength LED is disposed on the substrate in a form of a side view LED package, is coupled to the image sensing integrated circuit, and emits specific wavelength light. A specific wavelength penetrable package mold has a specific angle bevel relative to a horizontal surface of the substrate and reflects the specific wavelength light emitted from a specific wavelength LED die, such that the specific wavelength light is reflected to an upper side relative to the substrate.
摘要:
An optical sensing module is configured to sense a fingerprint of a finger. The optical sensing module includes an image sensor, a light transmissive layer, and an image selecting layer. The light transmissive layer is disposed on the image sensor, and the image selecting layer is disposed on the light transmissive layer. When the finger touches a side of the optical sensing module adjacent to the image selecting layer, air in valleys of the fingerprint contacts the optical sensing module, so that the image selecting layer has a first transmittance for light from the valleys; ridge of the fingerprint contact the optical sensing module, so that the image selecting layer has a second transmittance for light from the ridges. The first transmittance is not equal to the second transmittance. A fingerprint sensing device is also provided.
摘要:
An extension flash module is provided in the present invention. The extension flash module adopts xenon flash light and is for attaching on the headphone jack of a mobile device. When the extension flash module operates, the voltage output from the headphone connector is boosted to provide a high voltage to the extension flash module. When the high voltage is charged to a rate voltage, the extension flash module sends a charging complete signal to the mobile device through the microphone terminal of the headphone connector. When shutter instruction is performed, the mobile device triggers the extension flash module to flash.
摘要:
An exposure time determination method for image sensing operation includes: providing a first stage exposure condition which includes a first exposure time; sensing an image according to the first stage exposure condition to generate a first histogram which has a first histogram brightness maximum, a first histogram brightness minimum, and a first histogram width; increasing or decreasing the first exposure time to a second exposure time as a second stage exposure condition, and sensing the image according to the second stage exposure condition to generate a second histogram which has a second histogram brightness maximum, a second histogram brightness minimum, and a second histogram width; comparing the first histogram width with the second histogram width to generate a comparison result, and determining a third exposure time to be a third stage exposure condition according to the comparison result; and sensing the image according to the third stage exposure condition.
摘要:
An image sensing method includes: emitting light to a object to generate an image; providing a sensing device, which has plural sensor units arranged by plural columns and plural rows; receiving the image by the sensing device by way of rolling exposure; controlling a rolling shutter, such that when the sensing device receives the image by way of rolling exposure, the exposure time of at least one sensor row is adaptively determined.