摘要:
A classification system or classifying images of solder joints has a two-sided classifier to which query cases are presented. It can operate in an environment without task-specific counter-concept cases (“bad examples”) because it filters a library of general counter-concept cases to provide a refined set of counter-concept cases. The filtering is performed by a one-sided classifier, which uses a base of task-specific concept cases to perform the filtration.
摘要:
A classification system automatically generates an indication that a training feature vector case is a pollutant based on a mis-labelled reference image. It excludes the case from the set, builds a k-nearest neighbour confidence classifier, and then classifies the case using this classifier. The case may be marked as suspect if its classification does not match what is determined, or if they do match, if the confidence level is below a threshold. The system can automatically remove or re-label all suspect cases.
摘要:
A machine vision system comprising a structured light illuminator, a camera, an image processor, and a controller, wherein the controller dynamically adjusts parameters for structured illumination according to actual position of a subject being inspected.
摘要:
Solder fillets are inspected post-reflow by illuminating firstly from one side only along a dimension through a row of components. Only pixels arising from light received normal to the joints on that side are analysed. There is then illumination from the opposite side and corresponding image analysis normal to the right side fillets only. This avoids noise arising from reflections from a fillet across to the opposite fillet of an adjacent component.
摘要:
A machine vision inspection system captures images of placed components and generates defect data. The defect data indicates defect components together with associated confidence scores. The confidence scores are generated according to factors such as the number of sides of a component lead at which paste has been detected (attribute factor), or measured component position (measurement factor). The confidence scores allow the placement machine to decide on how to act upon the defect data. They are also used by the inspection system to decide on which “visual watchpoint” series of component images to output for operator visual inspection.
摘要:
Systems, methods, and computer program products for presenting, on a statement associated with a financial transaction instrument, an amount of interest avoided during a statement period. A first interest amount is computed for the statement period according to a first interest calculation method, the first interest amount being an interest amount actually billed to the transaction instrument account holder. A second interest amount is computed for the statement period according to a second interest calculation method. An amount of interest avoided for the statement period is computed by taking a difference of the first interest amount and the second interest amount. The amount of interest avoided for the statement period is displayed on the statement, whereby the holder of the transaction instrument is informed as to the amount of interest avoided by use of the first interest calculation method, rather than the second interest calculation method.
摘要:
An illumination head (1) for machine vision has an annular support (2) with first, second, third, and fourth illumination sections (3, 4, 5, and 6). The third section (5) has three sets of LEDs (12, 13, 14) arranged in a pattern so that each set illuminates at approximately the same angle. Each set is driven in succession so that a series of three monochrome images at the same angle are captured. These are superimposed by an image processor to provide a color image, although the camera is monochrome. More information can be obtained in such a color image and the high resolution and robustness of monochrome cameras is availed of.
摘要:
A measurement system (1) has a camera with a lens (12) and a separate sensor (10) mounted so that their planes (13,11) intersect at an object plane (3) according to the Scheimpflug principle. A reference camera(4) is normal and provides a 2D normal image which is used by an image processor (25) to determine a calibration image. This allows the image processor to determine height of the object (2). A single image capture provides an image of the full object, such as a ball grid array (BGA).
摘要:
A system has a projection lens directing on-axis light and low level LEDs directing light to blind microvias. A high resolution camera captures blind microvia images and an image processor recognizes defects according to classifications according to reflected light area and centroid position. The lens is telecentric for particularly effective image capture in blind microvias. The system also has an array of 6000 back lighting LEDs providing illumination for capture of images by a camera. These images are analyzed by the image processor to detect defects such as blocked through microvias.
摘要:
A closed loop controller (6) has a measurement server (11) which captures measurement data from a measurement machine (3) via a link (22). It also receives production data indicating which placement machine parts were involved in depositing inspected items, via links (20, 21). The server (11) correlates this data and transmits it via a link (23) to a closed loop client (10), which generates process engineer displays of the correlated data and generates a control signal for the placement machine (2). These are fed back via a link (24) for automatic closed loop control.