GLOSSARY
All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
[1]
| A/D | Acronym for Analog-to-Digital converter which converts an analog signal to a digital signal. A/D converters may be referred to as 8-bit, 10-bit, 12-bit converters. This just means the analog representation when converted into digital will have a tonal range from 0-255 for 8-bit, 0-1023 for 10-bit and 0-4095 for 12-bit converters. |
|---|---|
| Adapter | Adapter may have multiple references when speaking about imaging technology. An adapter could be a lens adapter, a connector that changes the gender, or an interface that talks to a camera. |
| AGC | Automatic gain control is a method to control the amount of brightness seen in the image. Typical method is increasing or decreasing the gain on a camera to a median level set by the user. |
| AIA | Automated Imaging Association. http://www.machinevisiononline.org/ |
| Aliasing | An image sampling error in digital systems manifesting itself as spatial frequency components beyond the sampling limit (Nyquist frequency) that are displayed at progressively lower frequencies. Aliasing can produce moiré pattern artifact in an image when the spatial frequency of the signal exceeds the sampling rate of the digitizer. |
| Analog | A common way to describe the difference between analog and digital is to think of a watch. An analog watch is one that has a hand that sweeps continuously around the dial. A digital watch has discrete numbers. Therefore, analog means a signal whose function is continuous. |
| Aperture | Most often is in reference to the numerical aperture of a lens also known as the f-stop. |
| ASCII (American Standard Code for Information Interchange) | An 8-bit code used to designate alphanumeric and other characters and symbols for computers. |
| Aspect Ratio | Often used to reference the ratio of width to height for an image in some standard format. Such as 4:3 used in conventional (native format) or 16:9 used in HDTV format. |
| Asynchronous | When a camera system is taking images not synchronized with the framing of a camera, it is often referred to as being asynchronous. This can also mean literally any function or signal when not in sync or unison with a reference signal can be referred to as asynchronous (not in sync). |
| Automatic Gain Control (AGC) | Automatic gain control is a method to control the amount of brightness seen in the image. Typical method is increasing or decreasing the gain on a camera to a median level set by the user. |
[1]
Copyright Notice and Privacy Policy |
Site Map |
Contact Us |
Copyright © 2013 Photron USA, Inc. All rights reserved.