Image Capture

In this modern day, most of our lives on digital and this means we need a way to capture images to put on a computer.This is called image capture and there are many different ways to do this ranging from camera's to capture devices.

Camera's
A camera works by recording images which can be transferred in different ways. They do this my by capturing the light with the lens with an aperture at one end for the light to enter. There used to be no way to get the image from the camera but it developed over the years.  When it used a film to store the pictures it was impossible still to put it onto a computer. Recently the pictures have started to be stored on flash memory which can be transferred to a computer and stored on a hard drive or flash memory. Since you can put the files on a computer , it makes it so you can edit them using various software such as photoshop. The default file extention is for images of this type is J-PEG.  As camera's get more advanced they will have more detailed pictures with more "megapixels" in addition to taking more frames in a still image.

There are various versions of camera's. Heres some of the more known ones.

Sony's Cyber-shot digital camera

• Camera Phone
• Digital Camera
• Movie Camera
• Pocket Camera
• Traffic Camera
• Video Camera

Scanners
Scanners are devices which can capture an image and transfere it onto a computer.It can scan images, printed text , drawings and objects. There are different types of scanners but the most common is CCD scanner. The different types just define the way it works. A CCD scanner is known as a flatbed scanner. This consists of a glass pane to put your picure on for example where under there is a light which lights up the picture. This light moves along the picture and using 2 mirrors, the capture device "scans" your picture and makes it a digital image.


Flatbed scanner

Diagram of CCD Scanner