Hewlett-packard Development Company, L.p.

Hp Indigo B.v.

Hewlett-packard Indigo B.v.

Gideon Amir

Dror Kella

Mark Sandler

Noam Shaham

Yaron Grinwald

Ram Dagan

Reut Avigdor

Shai Lior

Michel Assenheimer

Haim Yosef Cohen

Julia Kornilov

Eyal Negreanu

Michael Melamed

Niv Shem Tov

Steven J Simske

Tong Zhang

Doron Shaked

Matthew Donald Gaubatz

Ruth Bergman

Doron Schlumm

Gil Bar-Haim

Lluis Abello Rosello

Michael Plotkin

Eyal Shelef

Shlomo Harush

Joan Vidal Fortia

Gitit Ruckenstein

Assaf Pines

Gregory Braverman

Craig Breen

Jorge Martinez De Salinas Vazquez

Karl Walters

Niv Shemtov

Maya Shalev

Lior Krasnovsky

Gershon Alon

David Ben-Ovadia

Ed Costello

Barak Markus

Yoram Arnon

Lenny Ridel

Tadej Turk

Lior Kaykov

Rita Reznikov

Haim Gefen

Rita Feldman

Haim Livine

In an example, a method includes, at least one processor, in response to each of a plurality of requests, determining a halftone screen. Determining the halftone screen comprises encoding a signature pattern in the halftone screen, and halftone screens for different requests may be encoded with a different signature pattern. The halftone screen may be arranged such that, when applied to image data to provide a printed output, the pattern is discernible therein to provide a signature for the printed output.

Halftone screens encoding signatures

In an example, a method includes, by one or more processors, receiving a greyscale image having a plurality of pixels, each pixel being associated with a grey level, and the greyscale image having a first number of grey levels. An order of the pixels may be determined based on the grey level. A second number of grey levels may be determined, wherein the second number of grey levels is greater than the first number, and an indication of a target number of pixels per grey level of the second number of grey levels may be further be determined. Taking the pixels in order, and based on the target number of pixels per grey level, a new grey level may be allocated to each pixel to provide the second number of grey levels. The new grey levels may be converted to a threshold of a threshold halftone screen.

Halftone screens

Example implementations relate to emulating 3D texture patterns in a printer system. One example implementation receives an image having a number of image pixels and selects from a plurality of digital substrates which each correspond to a physical substrate. Each digital substrate has luminance change data corresponding to heights of a 3D texture pattern at respective locations of the physical substrate. An image having emulated 3D texture is generated by adjusting the luminance of the image pixels corresponding to respective locations of the physical substrate and according to the corresponding luminance change data.

Emulating 3D textual patterns

In an example, a method includes, by one or more processors, acquiring a dot pattern having a distribution of dots. A greyscale image comprising a plurality of pixels each associated with a greyscale value may be derived from the dot pattern. Deriving the greyscale image may comprise, for each pixel, determining the closest dot to the pixel and associating a distance of the closest dot from the pixel with the pixel, and assigning a greyscale value to each pixel, wherein the greyscale value is based on the distance associated with that pixel.

Greyscale images

An example method comprises identifying, by a processor, a gap in a housing of a printing apparatus and positioning an inlet of a conduit inside the housing proximate the gap. The inlet is fluidly connected to a fan, and the fan is powered to create a pressure differential across the housing to minimize the amount of air inside the housing being able to escape the housing via the gap.

Pressure diffrentials at printers

In an example, monitoring circuitry includes a first and a second coupling to electrically connect the monitoring circuitry to a monitored circuit having a resistance. The resistance of the monitored circuit may be indicative of a status, and the monitored circuit may be connected in series between the first and second coupling. The first coupling comprises a plurality of galvanically separated connection elements which are to form an electrical connection with a common connection element of the monitored circuit. The monitoring circuitry further comprises a monitoring apparatus to determine the resistance of the monitored circuit via the first coupling and the second coupling. The monitoring apparatus is to acquire a plurality of electrical values and to use the plurality of electrical values to determine a value of the resistance of the monitored circuit.

Monitoring circuitry

In an example, printed circuitry comprises a digitally printed switch, the printed switch comprising a first contact element printed using conductive print agent on a first substrate portion and a second contact element printed using conductive print agent on a second substrate portion. An interposed non-conductive printed spacer element is overprinted on at least one of the first and the second substrate portions.

Printed circuitry

Example implementations relate to emulating 3D texture patterns in a printer system. One example implementation determines a 3D texture pattern data having a number of pattern pixels at different heights and associated with respective surfaces of a corresponding 3D texture pattern. Luminance change data is determined for each pattern pixel depending on an angle between a normal vector of the respective surface and a simulated light vector. Image data is obtained having a number of image pixels and the luminance of each image pixel is adjusted depending on the luminance change data of a corresponding pattern pixel in order to generate an image with an emulated 3D texture pattern.

A method comprises providing to a processor or generating by the processor, an image, and a machine readable graphic code comprising a plurality of light pixels and a plurality of dark pixels. The processor determines whether the image and machine readable code are the same size if they are not the same size, scales or crops the image or the machine readable code such that they are the same size. The processor associates each graphic code pixel with a corresponding image pixel, each pixel having a lightness value. The processor determines for each image pixel, based on a comparison between a lightness of the image pixel and a lightness of a corresponding graphic code pixel, whether to adjust the lightness of the image pixel based on one of a low threshold lightness value and a high threshold lightness value. The lightness value is adjusted for each pixel of the image which is to be adjusted to a modified lightness value, such that a combination of the image and the graphic code is produced.

Combination of image and machine readable graphic code

In an example, monitoring circuitry includes a first and second coupling, at least one of which is to capacitively couple the monitoring circuitry to a monitored circuit on a product packaging. The monitored circuit has a resistance which is indicative of a status of a product stored in the product packaging, and the monitored circuit is to be connected in series between the first coupling and the second coupling. The monitoring apparatus may determine the resistance of the monitored circuit via the first and second couplings.

In a method and an apparatus for forming on a substrate () a pattern of a material, a material layer is provided on an intermediate carrier () and an adhesive layer is provided on the material layer, wherein at least one of the material layer or the adhesive layer comprises a pattern corresponding to the pattern to be formed on the substrate (). The material is transferred to the substrate () with the adhesive fixing the material to a surface () of the substrate ().

Method and apparatus for forming on a substrate a pattern of a material

In an example, a method includes receiving, at a processor, a digital version of an image combined with a machine readable graphic code. Areas of the combined image and graphic code that have a lightness level below a threshold level may be determined. Print instructions for depositing a metallic pattern wherein solid areas of the metallic pattern correspond to the areas of the combined image and graphic code that have a lightness level below the threshold level may also be determined.

Combined images and machine readable graphic codes

A radio frequency identification (RFID) device programming apparatus includes a transport system () to transport media () in a transport direction (), and an RFID device reader () to obtain first device identification data from a first RFID device () on the media and second device identification data from a second RFID device () on the media that is offset from the first RFID device in the transport direction. A first RFID device programmer () may program the first RFID device associated with the first device identification data, and a second RFID device programmer () may program the second RFID device associated with the second device identification data.

RFID device programming

According to one example, there is provided a visual security feature. The visual security feature comprises a security feature printed on a media. The security feature includes a security code printed on the media, and a holographic image is embossed on the printed security feature.

Visual security feature

Growing community of inventors

Ness Ziona, Israel

Gideon Amir