Canon Kabushiki Kaisha

Milestone Systems A/s

Romain Bellessort

Youenn Fablet

Hervé Ruellan

Frédéric Maze

Franck Denoual

Tristan Halna Du Fretay

Naël Ouedraogo

Johann Citerin

Pierre Visa

Falk Tannhauser

Gérald Kergourlay

At least one embodiment of a method for setting camera parameters of a camera, the method comprising:

Method and system for auto-setting of cameras

A method for setting a parameter value of a first video source device comprises: determining a first set of image characteristic values from an image captured by the first video source device configured with a first set of parameter values; obtaining a second set of image characteristic values generated from an image captured by a second video source device different from the first video source device, the second video source device being configured with a second set of parameter values; determining if the obtained second set of image characteristic values comprises values equivalent to values of the determined first set of image characteristic values; and if there are equivalent values, setting the parameter value of the first video source device using the second set of image characteristic values.

Method, device, and non-transitory computer-readable medium for setting parameters values of a video source device

A method for setting parameters values of a video source device comprising obtaining a value of an image characteristic for a current image generated by the video source device set with initial parameters values; determining a satisfaction level for the image characteristic of the current image based on the obtained value, the satisfaction level representing a probability to fulfil a task; obtaining a set of candidates, a candidate being defined as a set of parameters values; for each candidate, predicting an evolution of the satisfaction level for the image characteristic relatively to the satisfaction level determined while the video source device is set with the initial parameters values; selecting a candidate based on its predicted evolution of the satisfaction level; setting the parameters values of the video source device using the set of parameters values of the selected candidate.

A method for improving settings of a camera, the method comprising: obtaining a first set of setting parameters that are adjustable by an auto-setting algorithm, the setting parameters of the first set being set as a function of a task to be performed based on images obtained from the camera; obtaining a second set of setting parameters, the setting parameters of the second set being setting parameters of the camera, values of which are settable remotely from the camera; determining, as a function of the first and second sets of setting parameters, whether the auto-setting algorithm and the camera are compatible to perform the task; and if the auto-setting algorithm and the camera are compatible to perform the task, executing the auto-setting algorithm to adjust values of setting parameters of the camera.

Method and system for improving settings of a camera images of which are used to perform a particular task

There is provided methods for managing streaming over communication networks. Server and client devices share a push policy so that the client device may anticipate data pushes by the server. Anticipation makes it possible to cancel early the sending of some pushed data, therefore reducing bandwidth consumption. The shared push policy may be implicit to both server and client. In embodiments, it is explicitly specified by the server to the client, for example embedded in the Media Presentation Description file or included in a specific HTTP header. The client may also request an update of the shared push policy to meet its own requirements.

Adaptive data streaming method with push messages control

At least one embodiment of a method for setting camera parameters of a camera, the method comprising: obtaining a first set of image characteristic values of images captured by the camera at a first lighting condition, the image characteristics being dependent on the camera parameters, at least two image characteristic values of the first set respectively corresponding to at least two different values of a same camera parameter; determining at least one second set of image characteristic values by adapting values of the obtained first set of image characteristic values from images captured by the camera at at least one second lighting condition, at least two image characteristic values of the second set respectively corresponding to at least two different values of a same camera parameter; selecting camera parameter values, based on the determined at least one second set of image characteristics; and modifying settings of the camera as a function of the selected values.

The present invention relates to pushing at least one resource associated with a main resource, in response to a request for this main resource. After having received a request for a main resource and obtained from the cache memory a list of at least one resource linked to the main resource, an indication being associated with the at least one resource, the indication comprising a push policy defined by an application server, the at least one resource stored in the cache memory is pushed in response to a comparison of the indication associated with the at least one resource with a recommendation comprising a preferred push policy.

Methods, device, server and computer program products for pushing data in a network environment comprising cache servers

Methods and devices for encoding or decoding messages, each message including a list of information items. The encoding method comprises determining a first list of indexes associated with information items that are already indexed in a local indexing table and a second list of literal values of other information items not yet indexed in said indexing table; encoding the indexes of the first list; binary compressing at least a serialized binary representation of the literal values of the second list; and concatenating the first list and the second list together to obtain an encoded bitstream of the information items. When the messages are sent over a plurality of connections, a global table is shared between the connections to store the indexed items of information; and a local indexing table for each connection associates indexes with references to an entry of the shared global table.

Methods and devices for encoding and decoding messages

A method for providing resources to a client, the method being implemented at a server and comprising: making available an indication to the client, indicating that the server is configured to activate a persistent push feature upon authorization of said client, said persistent push feature allowing the server to push resources to the client at any time; and receiving a first message from the client, said first message being based on said indication and allowing the server to continuously push resources to the client.

Adaptive persistent push

The present invention relates to optimizing pushing of at least one resource associated with a main resource, in response to a request for this main resource, in an intermediary component comprising a cache memory. After having sent a request for a main resource to a second component different from the intermediary component, at least one identifier of at least one resource to be pushed by the second component is received from the second component in response to the sent request. Then, at least one of said at least one received identifier is stored in a list associated with the main resource, the list being stored in the cache memory.

Methods, devices and computer programs enabling data to be pushed in a network environment comprising proxies

The present invention relates generally to network quality estimation using HTTP/2 push feature. When network quality estimation is required, a client web application requests a server to enter a probing mode. During the probing mode, the server pushes useful data to the application for the latter to perform the estimation. This avoids wasting bandwidth since the useful data are likely to be used by the application. Furthermore, during the probing mode, the server notifies the application of the push start and the push end of each pushed data. This is one using a web socket established with the application. This makes it possible to overcome the limitations of the application in accessing HTTP/2 features of a client browser. Based on the notifications, the application is able to perform accurate estimations.

Push-based transmission of resources and correlated network quality estimation

The invention relates to processing a service request by a web runtime environment in a processing device, the processing of the service request enabling a service provider to provide a service requested in the service request. After having selected a specific interface based on the service request, a web driver application associated with the service requested in the service request is executed and the selected specific interface is implemented. Then, it is possible to interact with the web driver application, via said specific interface, for providing the service by the service provider.

Method, device, and computer program for improving access to services in a web runtime environment

The invention relates to a server and a method for processing requests when several requests compete within the same connection having fixed resources. Conventionally, a priority scheme provides priority values for a priority parameter that express priorities relatively to the priorities of other requests, meaning that a relative allocation of resources is obtained for each request. To achieve a better control on the server by the client, the invention provides specific possible values for the priority parameter that correspond to respective processing profiles. Each processing profile represents specific server behavior for resources allocation, by defining a predefined amount of resources. Thus, the client may choose between using the specific possible values to control the exact amount of resources that will be allocated by the server to process some specific requests, and using the other possible values that correspond to a relative allocation of resources as already done in known techniques.

Growing community of inventors

Rennes, France

Romain Bellessort