A Scanner is machine which recognizes optical characters. It has a computer processor, a scan head and an output device. The scan head is used to read images which in turn is translated by the computer and produced in a usable form. For example, a scanner is used to read invoices that have been returned with the payment checks by a direct-mail marketer. The code on the invoice is picked up by the scanner that indicates how much was owed and which customer is paying.
It is a multipurpose tool that is used in the office. It reads the images as thousands of individual pixels or dots. The scanner does all this with the help of scanning software. The file which has the images then can be used to enlarge, reduce or store databases. It can also be transferred into an excel worksheet or a word document.
Scanners like digital cameras help the user convert slides and three-dimensional objects into files that can be posted on the internet, pasted into a brochure or inserted into a presentation. These images can be manipulated to fit in accordance to the space and size required.
A scanner can automatically convert information to digital files using optical […]
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Technology has revolutionized the concept of capturing live images. The earlier concept of producing permanent photograph was based on pure chemistry. In 1830, Louis Daguerre, devised the first practical way of producing permanent photographs. Today we are talking about the computerized photo imagery in the filmless picture taken by a device that is smart in electronic intelligence and in appearance - digital camera.
A digital camera takes video, still photographs, or both digitally. It records images on a light sensitive sensor. Instead of using a film, an arrangement of charged-coupled devices-light sensitive semiconductors, which stores electrical charges,-does the job. These digital sensors-composed of pixels -transform the light from the scene snapped into an analog signal which is then converted into a digital version. One electronic filtering system regulates color and other picture components. Another system reduces the picture. The image is finally sent to a temporary storage area and ultimately onto a memory card. Many compact digital cameras can record sound, video and still photographs.
The images are transferred to a computer where they can be modified, printed, attached to email, inserted in web pages, etc. The most significant advantages of a digital camera are its memory capacity and ability to screen […]
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