摘要:
An apparatus (10) for detection of multiple documents (42) in a document transport system comprises a first transmitter (13) emitting a first signal at a first interval through a document feed path (40). A first sensor (14) detects the first signal from the first transmitter (13). A second transmitter (15) emits a second signal at a second interval through the document feed path (40). A second sensor (16) detects the second signal from the second transmitter (15).
摘要:
According to one aspect of the present invention an apparatus for multiple document detection includes an ultrasonic transmitter (14) for transmitting an ultrasonic signal (16). An ultrasonic receiver (20) receives the ultrasonic signal (17), after it passes through the at least one of the multiple documents (18). A phase comparator (24) compares the transmitted ultrasonic signal (16) and the received ultrasonic signal (17), and an amplitude measurement circuit (26) compares the received ultrasonic signal (17) to a reference. A microprocessor (32) compares an information signal (28) from the phase comparator (24) and an information signal (30) from the amplitude measurement circuit (26) to a predetermined threshold to determine if multiple documents are present.
摘要:
A method for determining a digital phase in a signal comprises sampling a reference signal for a low going edge. If the low going edge is not detected the reference signal is sampled again. If low going edge is detected (78) a counter is initialized (70). The reference signal is again sampled if a high going edge is not detected the reference signal is resampled until the high going edge is detected (79). When a high going edge is detected (79) a counter is started (73). A resulting signal is then sampled if the level of the resulting signal is high the resulting signal is sampled until a low going edge is detected (78). If a low going edge is not detected sampling of the resulting signal continues. If a low going edge is detected (78) sampling is continued until a high going edge is detected (79) at which point the counter is stopped (76). The counter updates a register (96). When the resulting signal was sampled for a high level the resulting signal is sampled until a high going edge is determined (79) at which point the register is stopped and converted to a phase difference (84). In one embodiment of the invention the reference signal being sampled is a driver for an ultrasonic transmitter (14) and the resulting signal is an electrical signal (21) representative of a received ultrasonic signal (16).
摘要:
A method of determining document characteristics prior to processing the document (11) in a document scanner (10) includes capturing at least a portion of an input image of documents in an input tray (20); transmitting the images to a processor (65); determining characteristics of the documents; processing the document based on the characteristics; wherein at least one characteristic is document length (70) or width (80) or position or other characteristics; and disabling or enabling ultrasonic zones (160) in at least one location down the document based on at least one characteristic.
摘要:
A method and apparatus for establishing optimum film exposure time for documents of different reflectances, A photo-sensor is used to produce a signal proportional to the intensity of light reflected from the document to be microfilmed, The signal is integrated and a time is determined for the integrated signal to reach a threshold or reference value, The time needed to reach the threshold value is measured very accurately by a microprocessor, The measured time is then convened to new time by using a look-up table, The new or desired shutter time is controlled by the microprocessor by terminating the exposure when the total time the shutter was open equals new exposure time found in this look-up table.
摘要:
An image processing unit for processing digital image data. A plurality of hardware interfaces each is associated with one of a plurality of digital image sources for receiving image data. There are means for determining a data source from the received image data, and an image processing unit connected to the interfaces processes the received image data to generate processed image data. An output interface connected to the image processing unit outputs the processed image data.
摘要:
A document scanner (10) includes an input tray (20) for holding documents (11). An input image capture device (30) captures at least a portion of the images of documents in the input tray. An image processor (65) determines characteristics of documents in the input tray, and the documents are processed based on the characteristics. At least one characteristic is document length (70), or width (80), or position (170), or other characteristics. An ultrasonic zone (160) detects the documents; and the ultrasonic zones are enabled or disabled in at least one location down the document based on at least one characteristic.
摘要:
A computer implemented method of receiving digital image data over a network, determining a source of the digital image data, accessing a database for retrieving image processing preferences based on the source of the digital image data, and processing the received digital image data according to the retrieved image processing preferences.
摘要:
A document scanner (10) includes an input tray (20) for holding documents (11). An input image capture device (30) captures at least a portion of the images of documents in the input tray. An image processor (65) determines characteristics of documents in the input tray, and the documents are processed based on the characteristics. At least one characteristic is document length (70), or width (80), or position (170), or other characteristics. An ultrasonic zone (160) detects the documents; and the ultrasonic zones are enabled or disabled in at least one location down the document based on at least one characteristic.
摘要:
A method of determining document characteristics prior to processing the document (11) in a document scanner (10) includes capturing at least a portion of an input image of documents in an input tray (20); transmitting the images to a processor (65); determining characteristics of the documents; processing the document based on the characteristics; wherein at least one characteristic is document length (70) or width (80) or position or other characteristics; and disabling or enabling ultrasonic zones (160) in at least one location down the document based on at least one characteristic.