摘要:
An automated license plate recognition (ALPR) system and method using a human-in-the-loop based adaptive learning approach. One or more images with respect to an automotive vehicle can be segmented in order to determine a license plate of the automotive vehicle within a scene. An optical character recognition (OCR) engine loaded with an OCR algorithm can be further adapted to determine a character sequence of the license plate based on a training data set. A confidence level with respect to the images can be generated in order to route a low confidence image to an operator for obtaining a human interpreted image. The parameters with respect to the OCR algorithm can be adjusted based on the human interpreted image and the actual image of the license plate. A license plate design can be then incorporated into the OCR engine in order to automate the process of recognizing the license plate with respect to the automotive vehicle in a wide range of transportation related applications.
摘要:
A diagnostic method for color stability in an image printing system includes printing a test pattern onto output media; measuring, during the printing of the test pattern, an image of the test pattern on an image transfer surface using one or more image transfer surface sensors to obtain one or more image transfer surface signals; measuring a printed image of the test pattern on the output media using a printed image sensor to obtain a printed image signal; calculating correlation functions for the one or more image transfer surface signals and the printed image signal; and analyzing the correlation functions for the one or more image transfer surface signals and the printed image signal to identify a subsystem in the image printing system that causes variations in color within the plurality of prints of the test pattern.
摘要:
A method for detecting motion quality error of printed documents having text in a printing system includes: printing a document having text lines, each text line comprising a plurality of characters; scanning the printed document to generate a scanned image; detecting positions in a process direction of the printing system of one of text lines and characters in the scanned image; determining position errors in the process direction in the printed document based on the detected positions in the scanned image; determining at least one motion quality defect of the printing system in the process direction based on the determined position errors; and initiating an activity associated with said printing system in response to a motion quality error having been determined. A system for detecting motion quality error of printed documents is also disclosed.
摘要:
A system and method is provided for embedding variable advertising content into an electronic book including a receiver positioned about the electronic book and configured to receive information; a processor for determining whether one or more tags are present in the information received and a replacement module for replacing the one or more tags with the advertising content, the advertising content derived from profile data associated with a plurality of users.
摘要:
A defect once around signal time period of a defect source inherent in a marking device is determined, the defect source having one or more banding frequencies. A reference scanline time delay, which is a time between a page sync signal and a writing of a reference scanline, is determined. A test target is written, sensed and analyzed. A reference scanline phase offset of each banding frequency relative to the reference scanline is determined. A banding phase of each banding frequency is determined based at least on the defect once around signal time period, reference scanline time delay and reference scanline phase offset.
摘要:
A method of integrating multiple sampling interval image data with timing information from a defect once-around sensor and the machine page sync signals to estimate a banding profile. By augmenting the sampling interval data with the timing data, proper phasing of each frequency over each sampling interval can be maintained. Specifically, when the data over the multiple intervals is taken, the defect source once-around signal and the page sync signals are also recorded. The combination of this information allows the algorithm to extract phase and amplitude information of banding defects from the sampling intervals using a new matched-filter based parameter estimation algorithm. Estimated banding profiles are then generated from the known frequencies, and the estimated amplitude and phase values.
摘要:
A method of correcting periodic banding defects in a printing system is provided. The method comprises: determining a banding profile estimate; determining a compensation profile; adjusting the compensation profile based on the transfer function of a motion system and the transfer function of a printing system; waiting until a defect once-around signal returns; and applying the output of the adjustment step to a controller controlling the speed of an imaging surface.
摘要:
A defect once around signal time period of a defect source inherent in a marking device is determined, the defect source having one or more banding frequencies. A reference scanline time delay, which is a time between a page sync signal and a writing of a reference scanline, is determined. A test target is written, sensed and analyzed. A reference scanline phase offset of each banding frequency relative to the reference scanline is determined. A banding phase of each banding frequency is determined based at least on the defect once around signal time period, reference scanline time delay and reference scanline phase offset.
摘要:
A method of printing includes, on an ongoing basis, determining a print defect state of a printing system, selecting a screen which has a halftone print parameter which masks a detected print defect, such as one or more of a screen frequency parameter, a screen angle parameter, and a dot growth parameter. The method further includes printing images according to the selected halftone print parameter. Alternatively, where the printing system includes more than one marking engine, the method includes selecting a marking engine according to the determined defect states of each of the marking engines.
摘要:
A system and method for correcting a defect in an image, such as a ghost defect or a reload defect, by compensating for the defect. Various exemplary embodiments include creating a defect model with a source target function that represents a source level with respect to a target level; inputting a test image to an image path actuator; inputting an output of the image path actuator to a marking engine; creating a test output image; measuring the test data on the test output image; inputting the test measurement data obtained from the test output image to a controller; inputting state data representing a state of the imaging device to the controller; inputting previously printed images to the controller; inputting current image to the controller, outputting an image correction factor from the controller based on the test image measurement data, the state data, the previously printed images, and the current image to the image path actuator; and creating a corrected image based on the image correction factor output from the controller.