| Vision System: |
A general term for a system that acquires images and performs inspections on a document or object in order to make decisions on that information. A typical Videk system consists of a camera, lens, lighting and a PC loaded with an image acquisition board & Videk Vision software. |
| Camera: |
A high-speed video camera using a 2-dimensional solid-state sensor that captures images. Videk Vision systems support up to 8 cameras. |
| Lens: |
A transparent piece of material with curved surfaces which either converge or diverge light rays. Lenses determine magnification, brightness, and mounting distance from the object being inspected. |
| Lighting: |
A key vision requirement to properly illuminate the document in order to achieve successful data capture. Typical Videk lighting systems are solid-state LED systems, although a wide variety of other lighting options are available. |
| Field of View (FOV): |
An area on the document the camera sees and images. FOV areas depend upon a combination of factors that include: camera sensor size, lens and mounting or working distance. The image in the FOV must be the proper size in order to accurately measure the features of interest. |
| Region of Interest (ROI): |
A user-defined area within the FOV where the vision system performs an inspection such as reading a code. |
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| Part Detector: |
A sensor that signals the vision system to acquire images from the document. |
| Pixel: |
A term used for the individual light-sensitive sites, or "picture elements" located on the camera sensor. It also refers to the elements in the acquired image in the system. When looking at the displayed image on the monitor, it consists of a matrix of pixels that are either 640 (H) x 240 (V) or 640 (H) x 480 (V). This is also referred to as the resolution of the image. |
| Gray Scale Value: |
Refers to the light level of each pixel, where a black pixel has a value of zero and a white pixel has a value of 255. |
| Correlation Algorithms: |
Videk's method of decoding patterns of an image into representative characters. |
