What is a video of a video document?
The video of the video document is a device used to display a larger version of the document to see a group of people. The device is focused on the document and the document can be displayed on the projector or monitor behind the device. Teachers often use cameras of video documentary in their classrooms.
A video of a video of documents can be supplied in table or portable light models. Desktop models should generally maintain stationary, for example on a table or on another housing, support piece of furniture. Portable lightweight models can also be used on tables, but are light enough to move with the frequency. A teacher who travels from one classroom to another or a teacher who shares one camera of video documents could rather use a portable lightweight model because it can be easily moved and set again.
Older versions of cameras video documents work as a video camera with flexible necks orGoose Krky. The neck, with the lens at the end, points to the document and then the document appears in real time. Newer versions are capable of this same performance, but they also have modern features such as the ability to take a document image and have it remembered for future use. This feature is often called "freezing image" and can be associated with the ability to zoom. Teachers can be more inclined to appreciate the function of freezing images above the approach, as the entire documents can be displayed in the class without much use for zoom.
Modern camera for video documents usually comes in two forms: extended graphics field (XGA) and super video Graphics Array (SVGA). The XGA video documents are known for its high -resolution rectangular images and SVGA shows square images with lower resolution. If you want to choose between these types of cameras video documents, teachers will have to assess their needs. They should also know that their decision can also be made by the type of device that ktEré must display their images. Some projectors or monitors are able to display only one type of image.
In general, when consumers buy video documents for a camera, they tend to consider portability, image resolution, lens optics, and power supply functions before deciding on one. Many teachers are also looking for easy use, which means they are able to select devices with controls and buttons that can be easily handled. Automatic focus is the popular camera of video documentary among teachers because it does not require the teacher to stop the lesson and manually focus the image of the document.