Abstract: A method for increasing signal to noise ratio is disclosed. The method can automatically detect saturation output voltage of the photosensors via adjusting exposure time or illumination intensity so as to obtain optimum output voltage of the photosensors as well as high signal to noise ratio that can generate high quality images.

Abstract: A method for correcting magnification in a photographic device is disclosed in this present invention. The point of this invention is that the magnification ratio of a photographic device is saved into a nonvolatile memory and read out for correcting the magnification in the photographic device, so that the image with correct dimension can be output from the photographic device. Therefore, this invention can provide a more efficient method for correcting magnification in a photographic device, and the quality of the image captured by the photographic device can be improved thereby.

Abstract: A scanning device having a cable for connecting various parts is provided. A method is provided using a differential pair of clock generated signals to cancel each other, thereby reducing electromagnetic emissions. The differential pair is characterized by each being in phase with the other with regard to frequency, and each being the reverse of the other in amplitude.

Abstract: An apparatus for capturing a document with a plurality of compression models comprises an image-processing system and an image-capturing system. The image-processing system is for accepting a request of setting the compression models for the document and processing the data of the document according to the compression models, wherein the request is from an exterior electric device connected to the apparatus. The image-capturing system is for capturing the data of the document, and is connected to the image-processing system and comprises multitudes of optic devices. The method for capturing the document with these compression models comprises accepting a request of setting the compression models for the document; capturing the data of the document; and processing the data of the document with these compression models.

Abstract: A circuit module integrating a light driver and an optical scanner is capable of sensing an image of a document and driving a light source. The circuit module comprises a printed circuit board, an optical sensor and a light driver. Both the optical sensor and the light driver are mounted on and electrically connected with the printed circuit board. The optical sensor is capable of sensing the image and the light driver is capable of driving the light source.

Abstract: A method of effacing zipper image, applicable to scan a document by a scanner with a stagger charge-coupled device. The nth (n is a positive integer) pixel obtained by scan on a scan line at which the zipper image is produced is subtracted by the (n+1)th pixel obtained by scan on the scan line. The absolute value of the result is then compared to a critical value. If the result is smaller than the critical value, the nth pixel is the nth pixel modified as the nth pixel after process.

Abstract: A method of compensating a zipper image by a K-value, and a method of calculating the K-value. Whether the nth primitive pixel of the mth line is obtained by primary line scan is determined. If the nth primitive pixel of the mth line is obtained by primary line scan, the nth primitive pixel of the mth line is compensated as the nth primitive pixel of the mth line minus a sum of the (n?1)th primitive pixel of the (m?k)th line and the (n+1)th primitive pixel of the (m?k)th line multiplied by the K-value. If the nth primitive pixel of the mth line is obtained by secondary line scan, the nth primitive pixel of the mth line is compensated as the nth primitive pixel of the mth line minus a multiplication of the K-value and a sum of the (n?1)th primitive pixel of the (m+k)th line and the (n+1)th primitive pixel of the (m+k)th line.

Abstract: A full-zone optical image addressing apparatus, including an addressing device, an image extraction converter, a comparator, an AND gate and a counter. The addressing device is located at the enclosure of the scanner and includes a plurality of geometric patterns. Each of the geometric patterns includes a plurality of rows of pixels. While receiving an exposure signal, the image extraction converter extracts one row of pixels from the addressing device, such that a series of analog signals is obtained and output to the comparator. The comparator then compares the series of analog signals to an analog critical voltage to output a series of analog comparison signals to the AND gate. The AND gate synchronously processes the series of analog comparison signals and a pixel rate clock to output the pixel data corresponding to the extracted row of pixels to the counter.

Abstract: An apparatus for capturing a document with a plurality of compression models comprises an image-processing system and an image-capturing system. The image-processing system is for accepting a request of setting the compression models for the document and processing the data of the document according to the compression models, wherein the request is from an exterior electric device connected to the apparatus. The image-capturing system is for capturing the data of the document, and is connected to the image-processing system and comprises multitudes of optic devices. The method for capturing the document with these compression models comprises accepting a request of setting the compression models for the document; capturing the data of the document; and processing the data of the document with these compression models.

Abstract: A full-zone optical image addressing apparatus, including an addressing device, an image extraction converter, a comparator, an AND gate and a counter. The addressing device is located at the enclosure of the scanner and includes a plurality of geometric patterns. Each of the geometric patterns includes a plurality of rows of pixels. While receiving an exposure signal, the image extraction converter extracts one row of pixels from the addressing device, such that a series of analog signals is obtained and output to the comparator. The comparator then compares the series of analog signals to an analog critical voltage to output a series of analog comparison signals to the AND gate. The AND gate synchronously processes the series of analog comparison signals and a pixel rate clock to output the pixel data corresponding to the extracted row of pixels to the counter.

Abstract: A method for increasing signal to noise ratio is disclosed. The method can automatically detect saturation output voltage of the photosensors via adjusting exposure time or illumination intensity so as to obtain optimum output voltage of the photosensors as well as high signal to noise ratio that can generate high quality images.

Abstract: A method of effacing zipper image, applicable to scan a document by a scanner with a stagger charge-coupled device. The nth (n is a positive integer) pixel obtained by scan on a scan line at which the zipper image is produced is subtracted by the (n+1)th pixel obtained by scan on the scan line. The absolute value of the result is then compared to a critical value. If the result is smaller than the critical value, the nth pixel is the nth pixel modified as the nth pixel after process.

Abstract: A method for increasing signal to noise ratio is disclosed. The method can automatically detect saturation output voltage of the photosensors via adjusting exposure time or illumination intensity so as to obtain optimum output voltage of the photosensors as well as high signal to noise ratio that can generate high quality images.

Abstract: A method of effacing zipper image, applicable to scan a document by a scanner with a stagger charge-coupled device. The nth (n is a positive integer) pixel obtained by scan on a scan line at which the zipper image is produced is subtracted by the (n+1)th pixel obtained by scan on the scan line. The absolute value of the result is then compared to a critical value. If the result is smaller than the critical value, the nth pixel is the nth pixel modified as the nth pixel after process.

Abstract: A scanning device having a cable for connecting various parts is provided. A method is provided using a differential pair of clock generated signals to cancel each other, thereby reducing electromagnetic emissions. The differential pair is characterized by each being in phase with the other with regard to frequency, and each being the reverse of the other in amplitude.

Abstract: A full-zone optical image addressing apparatus, including an addressing device, an image extraction converter, a comparator, an AND gate and a counter. The addressing device is located at the enclosure of the scanner and includes a plurality of geometric patterns. Each of the geometric patterns includes a plurality of rows of pixels. While receiving an exposure signal, the image extraction converter extracts one row of pixels from the addressing device, such that a series of analog signals is obtained and output to the comparator. The comparator then compares the series of analog signals to an analog critical voltage to output a series of analog comparison signals to the AND gate. The AND gate synchronously processes the series of analog comparison signals and a pixel rate clock to output the pixel data corresponding to the extracted row of pixels to the counter.

Abstract: A method of increasing the scanning resolution of a scanner through controlling its driving system. By suitably adjusting the timing relationship between motor pulses and exposure pulses, a low-resolution driving system can produce a high-resolution image with no additional production cost incurred.

Abstract: A compensating light source capable of compensating for the light intensity attenuation caused by the optical path and the designing method. First, a number of the predetermined light sources, which have uniform luminance, are chosen to respectively illuminate a chart with a uniform gray scale and produce a number of scanning light beams with respect to these predetermined light sources. After that, the scanning light beams are collected and focused to form an image on the optical sensing devices with respect to a number of image pixels. These image pixels can produce a number of sensing voltages with respect to the predetermined light sources. The tube dimensions of these predetermined light sources are relative to the sensing voltages of the predetermined light sources to form relative data. The relative data and the sensing voltages with respect to the selected predetermined light source are used to design a compensating light source. Then, a check action is performed.

Abstract: A method for correcting magnification in a photographic device is disclosed in this present invention. The point of this invention is that the magnification ratio of a photographic device is saved into a nonvolatile memory and read out for correcting the magnification in the photographic device, so that the image with correct dimension can be output from the photographic device. Therefore, this invention can provide a more efficient method for correcting magnification in a photographic device, and the quality of the image captured by the photographic device can be improved thereby.

Abstract: A circuit module integrating a light driver and an optical scanner is capable of sensing an image of a document and driving a light source. The circuit module comprises a printed circuit board, an optical sensor and a light driver. Both the optical sensor and the light driver are mounted on and electrically connected with the printed circuit board. The optical sensor is capable of sensing the image and the light driver is capable of driving the light source.