Glossaire technique
Vision Software
The basis of all imaging software is the ability to acquire, transfer, manipulate and interpret the pixel data output by a camera. What happens to these images can vary from the relatively simple task of saving them to disk, through to using them in a complex pattern recognition application.
2D calibration
Although not essential for all applications, calibrating a vision system is important if you are looking to extract data and make decisions based on measurements using real world units, such as for robot guidance.
Logiciels : 3D tools
3D inspection is one of the latest buzzwords in the vision industry. The term 3D summarises a number of totally different acquisition and evaluation techniques that are used to gain object information that could not be easily analysed using 2D camera technology.
Logiciels : 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.
Logiciels : OCR /ROC
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.
Logiciels : 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.
Logiciels : 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.
Logiciels : 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.
Logiciels : 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.
Optiques : Morphological functions
Mathematical morphology gets its name from the study of shape. Morphological imaging functions are ideal for highlighting structures within images.
Serveur embarqué GigE Vision
Tout système de vision est en principe composé de deux unités fonctionnelles essentielles : la source de l’image et la destination de l’image. De nos jours, des caméras CMOS compactes sont généralement utilisées comme source d'image dans le secteur de la vision industrielle. La destination de l’image est l’unité de traitement qui extrait des résultats à partir de l’image. Actuellement, il s’agit majoritairement de systèmes classiques sur PC avec processeur Intel et système d’exploitation Windows.
Software: Barcodes and matrix codes
There are many types of barcodes used in industry to track and identify products. Traditional 1D barcodes use a number of lines with varying widths and spaces, which define a numeric string. 1D barcode reading software analyses these patterns and returns a string.
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