Abstract: In some examples, there is provided a method, comprising receiving data encrypted using an encryption key, querying a digital ledger sewer for rights associated with the received data, recording, at the digital ledger server, a request to perform an access/process operation on the data, decrypting the data using a decryption key, and determining, using the rights, whether a rendering device is authorised to access and/or process the data.

Abstract: In an example there is provided a method to: communicate an offer of an item for sale to an entity based on an entity identifier, generate transaction data specifying the offer of the item for sale to the entity, the transaction data comprising at least the entity identifier, the item offered for sale, and a purchase condition for the item; and store the transaction data in a secure ledger.

Abstract: In an example there is provided a method to specify a workflow template comprising a sequence of tasks to be performed by workers to execute a workflow, encode the workflow template into a secure ledger, receive a transaction request from a worker to perform a task of the workflow according to the workflow template and validate the transaction request according to the content of the secure ledger.

Abstract: In an example, there is provided a method for creating a workflow, comprising workflow tasks. The method comprises assigning workflow tasks to workers, according to an access control policy. The method comprises encoding as a transaction to a secure ledger that access to the workflow is granted to a worker to perform a workflow task and enforcing access control on execution of the workflow task according to the transaction encoded to the secure ledger.

Abstract: A method is disclosed wherein data representative of a plurality of colors defined in a color space is received, the plurality of colors providing a color palette taken to be related to each other by predefined color harmony rules based on their relative positions in the color space. An irreproducible color of the color palette outside a rendering system's reproducible color gamut is determined, the reproducible color gamut having been received for a rendering system on which image data comprising colors of the color palette is to be reproduced. A suggested color for a replacement color palette also complying with the predefined color harmony rules is determined based on the reproducible color gamut to bring the color palette towards being within the rendering system's reproducible color gamut.

Abstract: Web server based color management hosted by a web server is provided enabling a production device to produce a print job with a similar color appearance as a reference device. The web server receives a production device color management profile and a reference device color management profile. The web server creates an output color management profile based on the color management profile of the production device and the color management profile of the reference device. The output color management profile maps device-independent color values associated in the color management profile of the reference device to device-specific color values for colors reproducible by the production device.

Abstract: A method is disclosed wherein data representative of a plurality of colors defined In a color space is received, the plurality of colors providing a color palette taken to be related to each other by predefined color harmony rules based on their relative positions in the color space. An irreproducible color of the color palette outside a rendering system's reproducible color gamut is determined, the reproducible color gamut having been received for a rendering system on which image data comprising colors of the color palette is to be reproduced. A suggested color for a replacement color palette also complying with the predefined color harmony rules is determined based on the reproducible color gamut to bring the color palette towards being within the rendering system's reproducible color gamut.

Abstract: An example method includes acquiring a 3D surface model at a processor. The processor may determine a plurality of differently segmented 2D representations of the 3D surface model. The processor may select, based on a predetermined 3D surface forming criteria, a segmented 2D representation of the plurality of differently segmented 2D representations for refinement. The processor may determine, based on the selected segmented 2D representation, a refined 2D representation. The refined 2D representation may be determined such that the refined 2D representation provides an output which, when formed in a heat deformable substrate, is formable to a shape of the 3D surface model with better accuracy than an output of the selected segmented 2D representation.

Abstract: Web server based color management hosted by a web server is provided enabling a production device to produce a print job with a similar color appearance as a reference device. The web server receives a production device color management profile and a reference device color management profile. The web server creates an output color management profile based on the color management profile of the production device and the color management profile of the reference device. The output color management profile maps device-independent color values associated in the color management profile of the reference device to device-specific color values for colors reproducible by the production device.

Abstract: A method of forming a color selection including selected color points. A first cluster in a color space is provided, the cluster being associated to a first color representation system. A second cluster in the color space is provided, the cluster being associated to a second color representation system, whereby the second cluster differs from the first cluster. A predetermined color point in the color space is provided. Included in the color selection are at least a first selected color point and a second selected color point, the first selected color point being the point of the first cluster which among all points of the first cluster is closest to the predetermined color point and the second selected color point being the point of the second cluster which among all points of the of the second cluster is closest to the predetermined color point.

Abstract: The invention relates to a method of forming a color selection including selected color points, the method comprising: providing a first cluster in a color space, the cluster being associated to a first color representation system; providing a second cluster in the color space, the cluster being associated to a second color representation system, whereby the second cluster differs from the first cluster; providing a predetermined color point in the color space; include in the color selection at least a first selected color point and a second selected color point, the first selected color point being the point of the first cluster which among all points of the first cluster is closest to the predetermined color point and the second selected color point being the point of the second cluster which among all points of the of the second cluster is closest to the predetermined color point.

Abstract: A graphical user interface for controlling a printer application is presented. The interface comprises a first menu having a first set of selectable options; and a second menu concentrically-disposed relative to the first menu, the second menu having a second set of selectable options which are hierarchically related to the first set of selectable options. A selectable option is selected by positioning selection means within a region associated with the selectable option. When a selectable option of the first set is selected, a selectable option of the second set having a hierarchical relationship with the selected option of the first set is displayed.