Knowledge base
Learn more about machine vision! In our knowledge base we are explaining key technical terms about image processing. We give you an overview to topics like 3D machine vision or the established standards like CameraLink, GigE Vision or GenICam.
IEEE 1394 - FireWire
IEEE 1394 (also known as FireWire) was originally developed by Apple Computers as a flexible interconnection bus for consumer digital video and computer peripherals such as hard drives and printers.
Image arithmetic and flat-field correction
There are many arithmetic operations that can be performed on images. These work on a pixel-by-pixel basis; reading one or more pixel values, performing an arithmetic function on the pixel and exporting the result as an output image.
Image Processing
Digital image processing generally comprises the generation, transmission and analysis of images and image information.
Image processing and analysis tools
Machine vision systems deploy many image processing tools to manipulate input images and produce one or more output images.
Inspection tools
Inspection tools differ from processing tools in that they deliver single or multiple data sets gained from an image instead of the full image. Results can be in the form of simple pass/fail, a measurement, item location, feature count, text string or a classification score.
Look-up tables (LUT)
Another widely used technique in image processing is 'Look-Up Tables'. LUTs allow image data to be passed through an array that maps an input pixel value to an output value.
Morphological functions
Mathematical morphology gets its name from the study of shape. Morphological imaging functions are ideal for highlighting structures within images.
OCR (Optical Character Recognition)
Tools that perform Optical Character Recognition (OCR) have much in common with pattern matching and share many of the same underlying techniques such as pattern finding and contour detection.
OCV (Optical Character Verification)
OCV (Optical Character Verification) is used to check the quality of signs regarding brightness and legibility or the general existence of an imprint with respect to its position.
Pattern matching
Most vision tool kits offer some type of pattern matching tool to locate and classify objects and patterns. This is one area where there has been a great deal of development in recent years.
Pixel statistics
Pixel statistics are often used in very simple applications to detect part or feature presence/absence. This is achieved by examining the grey value statistics (histogram) of an image region.
Print quality inspection
The increasing performance level of modern PCs allow applications to be tackled that were previously the domain of special dedicated hardware. One such area is the monitoring of print quality.