Abstract:
A three-dimensional object printer ejects drops of a build material from a plurality of ejectors in a first printhead to form an object on a first region of a member and ejects drops of a support material from a plurality of ejectors in a second printhead to support the object on the first region of the member. The second printhead ejects drops of the support material onto a second region of the member that is separate from the first region to form a substrate layer. The first printhead ejects drops of the build material onto the substrate layer to form a printed test pattern. An image sensor generates image data of the printed test pattern to identify an inoperable ejector in the first printhead.
Abstract:
A method and system for parking occupancy detection comprises collecting video of the parking facility with a video capturing device, counting an occupancy of a parking facility using at least one sensor to establish a sensor occupancy count, classifying each of a plurality of parking spots as occupied or vacant with a classifier according to the classification threshold in order to establish a video occupancy count, determining a difference between the sensor occupancy count and the video occupancy count, and setting the sensor occupancy count to equal the video occupancy count if the difference between the sensor occupancy count and the video occupancy count exceeds a difference threshold.
Abstract:
Methods and systems print test patterns in different test pattern areas on print media using a printer to produce a printed item. The printer has a printing width in a cross-process direction, and each of the test pattern areas is in a different cross-process location of the printing width. The test pattern areas are distributed across the entire printing width, and each of the test pattern areas partially overlaps at least one other test pattern area in the cross-process direction. Next, these methods and systems individually scan the sections of the printed item using a scanner that has a scanning width that is less than the printing width. This produces individual scans of the test pattern areas. The widths of the test pattern areas are equal to or less than the scanning width. Then, these methods and systems can calibrate cross-process characteristics of the printer based on the scans.
Abstract:
There is described a method of operating an aqueous ink jet printing apparatus. The printing apparatus includes a member defining a reflective imaging surface wherein the imaging surface is substantially white or grey in the visible spectrum and wherein the imaging surface has an optical density variation of less than about 0.3. The method includes a photosensor array disposed to receive light reflected from the reflective imaging surface. The method includes ejecting aqueous ink onto the reflective imaging surface using a printhead and forming aqueous ink drops on the surface of the rotating member. The method includes generating image data from the reflecting imaging surface using the photosensor array. The method includes identifying a parameter from the generated image data that is not within specification
Abstract:
A method of operating a printer to detect errors in an optical sensor includes forming a printed line across a first side of a print medium and generating first image data corresponding to the printed line with the optical sensor. The optical sensor generates second image data of the second side of the print medium as the print medium passes the optical sensor a second time. A detect in the optical sensor is identified with reference to a difference between process direction alignments of the line in the first image data and the second image data.
Abstract:
An inkjet printer is configured to capture image data of a bare rotating imaging surface and use the image data of the bare rotating imaging surface to remove noise from subsequent images of printed ink on the rotating imaging surface. A controller in the printer is configured to measure cross-correlations between margins in the bare rotating imaging surface image data and margins in the subsequent images of printed ink to identify areas of alignment between the image data of the bare rotating imaging surface and the subsequent images of printed ink. The data in the areas in the image data of the bare rotating imaging surface that are aligned with areas in the subsequent images are used to remove the background noise produced by structure in the rotating imaging surface.
Abstract:
A method for process direction registration in an inkjet printer includes ejecting ink drops from a first inkjet at less than a maximum operating rate onto an image receiving surface moving in a process direction. The method includes generating image data samples of the image receiving surface including the ink drops. The method further includes identifying a center of the ink drops in the process direction with reference to the image data samples and storing a time offset value in a memory to correct an identified process direction offset between the identified center of the ink drops and another identified center of ink drops that are ejected by another inkjet.
Abstract:
An aqueous inkjet printer is configured to evaluate and adjust multiple components within the printer with reference to image data of the surface of a rotating member obtained at different times during a single print cycle. The print cycle can be performed in a multiple pass manner to enable a single optical sensor to be used for generation of the image data. Alternatively, the print cycle can be performed in a single revolution of the rotating member and multiple optical sensors positioned about the rotating member to generate the image data.
Abstract:
A method of operating a printer includes identifying a region of a print medium located between marks formed by a first plurality of inkjets in the printer and an edge of the print medium. The printer activates a second plurality of inkjets to print ink drops into the region during a printing operation. The method enables full-bleed or near full-bleed printing for different media sizes.
Abstract:
A method, non-transitory computer readable medium, and apparatus for calculating a transaction quality score of a merchant are disclosed. For example, the method analyzes fraudulent transaction data in a fraudulent transaction data table for each one of a plurality of merchants, calculates a transaction quality score for the each one of the plurality of merchants based on the fraudulent transaction data, filters the plurality of merchants having a respective transaction quality score above a threshold and transmits the plurality of merchants having the respective transaction quality score above the threshold for display.