Abstract: The present invention discloses a locus smoothing method, comprising: generating multiple locus points by movement of an object; obtaining corresponding coordinates of the locus points; calculating a moving average coordinate of the coordinates of the locus points by a moving average function, wherein an average number is used as a denominator; adaptively adjusting the average number according to a velocity of the object, wherein a lower average number is used when the velocity of the object is relatively faster, and a higher average number is used when the velocity of the object is relatively slower.

Abstract: The present invention discloses a remote controllable video display system and a controller therefor, wherein positional information is generated by a sensor according to light from a light source. The controller includes a button with a predetermined function, wherein when the button is pressed or released, the status of the button (pressed or released) is outputted but (i) the positional information is not outputted or not processed within a predetermined period of time; or (ii) the positional information is not outputted or not processed when the remote controller has an acceleration larger than a predetermined value. Or, when the button is pressed once, the controller outputs double-click or multiple-click action information.

Abstract: A photogravure process for an identification code includes Step A. making a press plate by using a seamless steel tube or a copper tube as a press plate substrate, and engraving an information of the identification code onto the press plate substrate by means of electric engraving or laser engraving; and Step B. printing the information of the identification code by using a monochrome gravure printing press or a multi-color gravure printing press to print the information of the identification code on a film substrate, so as to form the ink information layer. By using the photogravure process, the identification code printed has the benefits of solid and rich colors, clear graphics and letters, appropriate contrast, and realistic images. In addition, the disclosed photogravure process allows high printing efficiency with a printing speed up to 100 m/min while the cost required is low.

Abstract: The present invention discloses an adaptive de-flicker device and a method for adaptive de-flicker. The device includes: a light sensor for sensing ambient light and generating a corresponding sensed signal; a signal processor coupled to the light sensor, for generating a signal related to a frequency of the ambient light and a feedback signal according to the sensed signal generated by the light sensor; and an automatic gain control circuit coupled to the signal processor, for generating a control signal according to the feedback signal, to adjust the sensed signal by feedback controlling the light sensor, or to adjust the signal related to the frequency of the ambient light by feedback controlling the signal processor.

Abstract: An optical mouse and image capture chip thereof. The image capture chip comprises an image sensor, a calculating logic circuit, and a refreshing logic circuit. The image sensor has a plurality of sensor units, capturing an image according to an exposure parameter to provide a plurality of exposure values. The calculating logic circuit provides an average exposure value by calculating the exposure values. If the exposure sample is within a first exposure range, the refreshing logic circuit maintains the exposure parameter and accordingly drives the image sensor to capture a next image. If the average exposure value is within a second exposure range, the refreshing logic circuit adjusts the exposure parameter with a first exposure extreme and accordingly drives the image sensor to capture a next image.

Abstract: An image qualification method. A movements-determining method utilizes the image qualification, the image qualification method of which requires only an image frame to determine if the image frame is qualified. Thus, the image qualification proceeds in real time. The image qualification counts peaks of images of the frame to determine if a number of the peaks exceed a certain number, depending on application.

Abstract: The present invention discloses a motion image data generator, a system using motion image data, and methods relating to the generator and the system. The motion image data generator comprises: a photo sensor for capturing an image and converting it to digital image data; and a motion detection and processing circuit coupled to the photo sensor for comparing two digital image data outputted from the photo sensor to determine whether there is an object moving, and generating a corresponding output. In determining whether there is a movement, an object which keeps moving by a fixed frequency is filtered out.

Abstract: The present invention discloses an adaptive de-flicker device and a method for adaptive de-flicker. The device comprises: a light sensor for sensing ambient light and generating a corresponding electric signal; and a signal processor coupled to the light sensor, for obtaining a flicker frequency of the ambient light according to the electric signal generated by the light sensor. Preferably, the adaptive de-flicker device further comprises a clock generator coupled to the signal processor, for generating a clock signal relating to the flicker frequency of the ambient light according to an output signal of the signal processor.

Abstract: A method for adjusting an operation frequency of an optical input device is introduced. The method includes capturing and setting a first image as a reference frame of the optical input device; capturing and setting a plurality of frames as a plurality of sample frames of the optical input device; analyzing the plurality of sample frames according to the reference frame; capturing a second image according to a predetermined rule and setting the second image as the reference frame of the optical input device instead of the first image; and adjusting an operation frequency of the optical input device according to a time interval between setting the first image as the reference frame of the optical input device and setting the second image as the reference frame of the optical input device.

Abstract: A method and device of feature enhancement for digital image processing. A predefined feature in one dimension of the image is searched to obtain several peaks, and each peak is either a local maximum or local minimum. Each peak is enhanced by adding an offset to increase the local maximum or decrease the local minimum. The offset of each peak is computed by calculating the difference between each peak and the preceding peak, then multiplying by a preset ratio.

Abstract: A method for increasing a report rate of a wireless mouse for decreasing delay time of the wireless mouse includes selecting a packet mode, inputting data corresponding to the selected packet mode according to control signals inputted into the wireless mouse, performing a first error check operation according to a first data, performing a second error check operation according to the first error check operation and the inputted data, forming an error check block according to the second error check operation, forming a packet according to the error check block and the inputted data, and outputting the packet through a radio-frequency channel.

Abstract: The present invention provides a method for increasing a report rate of a wireless mouse for decreasing delay time of the wireless mouse, which includes: selecting a packet mode from a plurality of packet modes and inputting data corresponding to the selected packet mode for forming a packet according to control signals inputted into the wireless mouse; and outputting the packet through a radio-frequency channel. The present invention further provides a method for reducing power consumption of a mouse, which includes: detecting a moving speed of the mouse; and transmitting packets with a low report rate when the moving speed of the mouse is less than a default value.

Abstract: A method of estimating image displacement by block matching for a pointing device used in a computer system. The method provided in the present invention comprises capturing digital images sequentially using a photo capture device, obtaining a template frame and a current frame, estimating a predicted velocity vector, and computing the displacement of the image. The efficiency and reliability of block match searching are improved by reducing the search range according to the calculated displacement. The template block can be defined anywhere on the template frame according to the predicted velocity to extend the lifetime of the template frame, and the displacement vector between the template block and the center of the template frame is proportional to the predicted velocity.

Abstract: An image qualification method. A motion detection method. An optical navigation sensor. Image qualification, requiring only a single image frame to determine if an image frame is qualified, proceeds in real time. On the basis of the image qualification method, a motion detection method that prevents erroneous flickers is also provided for use in an optical navigation sensor.

Abstract: A method and device of feature enhancement for digital image processing. A predefined feature in one dimension of the image is searched to obtain several peaks, and each peak is either a local maximum or local minimum. Each peak is enhanced by adding an offset to increase the local maximum or decrease the local minimum. The offset of each peak is computed by calculating the difference between each peak and the preceding peak, then multiplying by a preset ratio.

Abstract: A pointing device with a locus smoothing function. The pointing device comprises a locus processing circuit receiving a digitized displacement and executing an accumulation procedure to generate an accumulated value of displacement, wherein when the accumulated value satisfies a preset condition, the accumulated value is output to a processing device for smoothing a locus of a pointer on a display device and a reset procedure is executed to reset the accumulated value.

Abstract: A method of estimating image displacement by block matching for a pointing device used in a computer system. The method provided in the present invention comprises capturing digital images sequentially using a photo capture device, obtaining a template frame and a current frame, estimating a predicted velocity vector, and computing the displacement of the image. The efficiency and reliability of block match searching are improved by reducing the search range according to the calculated displacement. The template block can be defined anywhere on the template frame according to the predicted velocity to extend the lifetime of the template frame, and the displacement vector between the template block and the center of the template frame is proportional to the predicted velocity.

Abstract: A method and device of feature enhancement for digital image processing. A predefined feature in one dimension of the image is searched to obtain several peaks, and each peak is either a local maximum or local minimum. Each peak is enhanced by adding an offset to increase the local maximum or decrease the local minimum. The offset of each peak is computed by calculating the difference between each peak and the preceding peak, then multiplying by a preset ratio.

Abstract: An optical mouse and image capture chip thereof. The image capture chip comprises an image sensor, a calculating logic circuit, and a refreshing logic circuit. The image sensor has a plurality of sensor units, capturing an image according to an exposure parameter to provide a plurality of exposure values. The calculating logic circuit provides an average exposure value by calculating the exposure values. If the exposure sample is within a first exposure range, the refreshing logic circuit maintains the exposure parameter and accordingly drives the image sensor to capture a next image. If the average exposure value is within a second exposure range, the refreshing logic circuit adjusts the exposure parameter with a first exposure extreme and accordingly drives the image sensor to capture a next image.

Abstract: A light control module appropriate for an optical pointing device. The light control module comprises a processing unit outputting a first signal and a second signal, a photo sensor unit executing a capture operation according to an impulse of the first signal, and a light emitting unit executing a light emitting operation according to an impulse of the second signal, wherein when a frequency value of the first signal is less than a first preset value, at least one impulse is inserted between two successive impulses of the second signal for adjusting a frequency value of the second signal such that an equivalent frequency value corresponding to any two successive impulses of the second signal is greater than a second preset value, thus rendering flickers of the light emitting unit imperceptible.