A document camera is also famous as docucams, a visual presenter, or digital overhead. Document cameras are used to capture images in real-time. It can also be used to display images or objects to a widely seated audience.
Some document cameras are used to enlarge and display the pictures of real, three-dimensional objects and transparent objects. They are high resolution cameras that can be mounted on to arms or a tripod if the item to be displayed is on a table or flat surface. This ability balance on a stand enables the presenter or teacher. This is ideal for use in a classroom to demonstrate an experiment, phenomenon, or two-dimensional object to a classroom containing a lot of students or a large auditorium or hall full of people.
Various document cameras allow a large range of movement and some are stationary in nature. Flexible document cameras may be used for an experiment or demonstrate the movement, or travelling of an object, or if there is a humongous object that cannot be moved repeatedly or easily, the camera can be moved around the object as per needed. In the case that there is a large working surface area, the document camera can be mounted onto the ceiling in order to cover the entire working area.
Uses of a Document Camera
A document camera is useful in the following ways:
- In a classroom
- Training conference
- Work Shops
- Presenting evidence relating to cases in courtrooms
- Medical industry
SMART boards Document cameras are a replacement for previously used overhead projectors and epidiascopes. With the zoom feature, the document camera is able to magnify tiny writing fonts in books. In order to use a document camera the lighting of the room must not be low, as when using a projector, this makes it very useful when being used in a schoolroom. Many document cameras are able to direct a video to the PC through an easily available USB cable. Oftentimes, document cameras are used hand-in-hand with an interactive whiteboard.
Users may attach microscopes through a certain accessory with a document camera in the case they want to display a microorganism on a larger screen to an audience or biology classroom.
Since the year 2016, the document camera sensors are able to provide picture quality of either 720p or 1080p (1920×1080 pixels)
The Inner workings of a Document Camera
Newer document cameras are equipped with CCD sensors or CMOS sensors. The newer technology provided through these modern document cameras provide a much higher resolution that as a result.
The image sensors present in a document camera give the images in monochrome colors. With the addition of a 1 chip camera, the color information can be changed for each pixel with the use of various filters. The green, blue, and red filters are organized in a certain way such that the green pixels are twice as large in size as compared to blue and red filters. This provides more clarity and the resolution is similar to the provided by the human eye.