Sick Ivp Ab

Ivp Integrated Vision Products Ab

Saab Ab

Forchheimer, Robert

Åström, Anders

Anders Åström

Robert Forchheimer

Mattias Johannesson

Niclas Fock

Erik Åstrand

Gert Johansson

Method and motion encoder for providing a measure indicative of motion of an object. The indicated motion is relative to an image sensing circuitry and in a direction that is perpendicular to an optical axis of the image sensing circuitry when the image sensing circuitry provides image frames sequentially imaging at least part of said object during the motion. The motion encoder obtains image data of a sequence of said image frames and then computes, for at least one pixel position of said sequence of image frames and based on the obtained image data, at least one duration value. Each duration value indicating a duration of consecutively occurring local extreme points in said sequence of image frames. The motion encoder then provides, based on said at least one duration value, said measure indicative of the motion.

Motion encoder

Method and an imaging and processing circuit for identifying a certain pixel as a local extreme point. The imaging and processing circuit generates, in a certain sensing element associated with said certain pixel and in two or more of its closest neighboring sensing elements, sensed signal levels, respectively, based on sensed light during an exposure to light. It provides, based on comparisons between said sensed signal levels and at least two different threshold levels, binarized image data of said certain sensing element and said two or more of its closest neighboring sensing elements. The imaging and processing circuit then identifies, by means of a computing element configured to operate on the provided binarized image data, said certain pixel as the local extreme point based on that the provided binarized image data of said certain sensing element differ from the provided binarized image data of said two or more of its closest neighboring sensing elements.

Method and arrangements for identifying a pixel as a local extreme point

The present invention relates to a method and an arrangement for representing the characteristics of an object with a measuring system, in which either the measuring system or the object is designed to move in relation to one another in a predefined direction of movement. The object preferably is designed to move in relation to the measuring system. At least one light source is designed to illuminate the object with a light which is incident upon the object and has a limited extension in the direction of movement. An imaging sensor, which is arranged on the same side of the object as the light source is designed to pick up light reflected from the object and to convert this into electrical charges. An image-processing unit is furthermore designed to create a digital representation of the object from said electrical charges. The light source is arranged at a predetermined distance from the imaging sensor viewed in the direction of movement, and the image-processing unit is designed to simultaneously read out information on the geometric profile of the object and information on the light scatter in a predetermined area around said profile.

Method and arrangement in a measuring system

The invention relates to a method of executing image processing operations such as object recognition or linear/non-linear filtration on a two-dimensional image. This is performed with light-sensitive sensor elements (4) executed in two-dimensional matrix form. The sensor elements (4) are so arranged as to produce an output signal corresponding to the light intensity. The output signal of each sensor element is compared with a monotone increasing or reducing reference value. The extent to which the output signal from the sensor element is greater than or less than the reference value is continuously monitored for each sensor element. An arrangement for the execution of this method comprises a number of sensor elements (4) arranged on a substrate. Each of these has allocated to it on the substrate a comparator (5) so arranged as to compare the output signal of the sensor element with a pre-adjustable reference value and a sub-processor. Each sub-processor (8) is so arranged as to identify the occurrence of combinations of sensor elements (4) for which the output signal has exceeded or has not exceeded the aforementioned reference value.

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Linköping, Sweden

Anders Åström