摘要:
An auto-focus (AF) method adapted for an image capturing device includes following steps. When a first press signal generated by a user pressing a button of the image capturing device is detected, a local peak searching method is applied to perform an AF procedure. It is determined whether a second press signal generated by the user pressing the button is detected. If not, it is determined whether a first released signal generated by the user releasing the button is detected. The continuous pressing count is calculated according to the first released signal and the first press signal that are continuously generated. Whether the continuous pressing count is greater than a first threshold is determined. If yes, a global peak searching method is applied to perform the AF procedure. If not, the local peak searching method is still applied to perform the AF procedure.
摘要:
An automatic focusing method and device in a high-noise environment are used for determining a focusing distance between a digital imaging device and an object to be photographed. The automatic focusing method includes the steps of capturing M pre-photographed images at different object distances respectively; loading the pre-photographed images; superposing every N (N
摘要:
An automatic focusing method in a high-noise environment and a digital imaging device using the same are used for determining an object distance. The method includes taking two digital images at a farthest object distance and taking two digital images at a nearest object distance, under a first exposure condition and a second exposure condition; capturing digital images under the first exposure condition at a plurality of different object distances other than the farthest and nearest object distances; selecting at least two images captured at adjacent object distances to create a composite image; calculating an object distance of the composite image; calculating high-frequency signals of the second farthest object distance image, the second nearest object distance image, and the composite image in the focusing frame; determining from the images an object distance corresponding to the maximum high-frequency signal; and moving an automatic focusing lens to the object distance.
摘要:
An adjustable biased Gamma-correction circuit with central-symmetry voltage is disclosed. The present invention provides varistors, transistors, or operation amplifiers in a Gamma-correction circuit to obtain a plurality of plus and minus symmetrical driving voltages based on a central voltage. Utilizing the present invention, a Gamma-correction circuit can generate the most adjustable driving voltages by using the minimum voltage sources.
摘要:
The invention provides a flash light device, which includes a light source, a light diffuser and a light diffuser's driving unit. The light diffuser's driving unit provides the light diffuser with a required driving voltage according to a voltage information, in which the voltage information is determined according to an original image without light-complementing of the light source and a pre-flash image with light-complementing of the light source.
摘要:
A voltage-controlled light diffusing module, a flash lamp module and a controlling method thereof are provided. The voltage-controlled light diffusing module includes a light diffuser, a driving circuit and an information processing unit. The information processing unit receives face information for deciding a driving voltage of the driving circuit, so as to change transmission of the light diffuser.
摘要:
An automatic focusing method in a high-noise environment and a digital imaging device using the same are used for determining an object distance. The method includes taking two digital images at a farthest object distance and taking two digital images at a nearest object distance, under a first exposure condition and a second exposure condition; capturing digital images under the first exposure condition at a plurality of different object distances other than the farthest and nearest object distances; selecting at least two images captured at adjacent object distances to create a composite image; calculating an object distance of the composite image; calculating high-frequency signals of the second farthest object distance image, the second nearest object distance image, and the composite image in the focusing frame; determining from the images an object distance corresponding to the maximum high-frequency signal; and moving an automatic focusing lens to the object distance.
摘要:
This invention is related to an automatic Gamma correction system in which a novel display driving circuitry is designed with a digital/analog converter (DAC), wherein the Gamma reference voltages as well as the corresponding gray-scale values are adjustable. Therefore, the present invention provides a greater degree of freedom for the realization of the correction of Gamma parameters so as to fit the curve representing the transfer function of the destination gray-scale values and the voltages required by the display driving circuitry.
摘要:
Disclosed is a multistage charging circuit for driving liquid crystal displays, designed particularly to provide a multistage charging driving circuit for liquid crystal display, in which the pixels can be pre-charged to a determined voltage value before the next data are written by performing charge-sharing and pre-charge. Due to the fact that the voltage and the next data have the same polarity, the problems resulted from gray-scale voltage imprecision and latch up at the output can be prevented and thus high gray-scale precision and low power dissipation can be achieved.
摘要:
Disclosed is a DAC (digital/analog converter) with adjustable digital codes corresponding to reference voltages, in which a novel DAC designed with an associated circuit is used in non-linear digital-code-to-voltage transfer applications, so as to provide the display with analog voltage signals. In such a DAC, the Gamma reference voltages as well as the corresponding digital codes are adjustable. It provides a greater degree of freedom for the realization of the correction of Gamma parameters so as to fit the curve representing the transfer function of the destination digital codes and the voltages required by the data driver and to precisely implement the digital-code-to-voltage transfer function.