How does a Digital Camera Work?

In the past few decades, consumer electronics has seen major breakthroughs due to advancements in the application of new technology. One of the fields to be revolutionized by these changes has been photography, as exemplified by the rapid adoption of the digital camera. This gadget has changed remarkably over the past few years and transformed the way we handle visual communication.

The Basics of a Digital Camera

The manual camera requires a film to store the images that were shot. Various factors need to be taken into consideration to get the required output, and then the result is printed on photographic paper, using the film roll and chemicals. If you want to send this image over e-mail, you need to first scan it and convert it into an electronic image. As opposed to this, the simple logic of a digital camera is that it directly takes photographs in electronic format. So these images, in the end, are just a collection of 1's and 0's, which we call pixels.

The Operation of a Digital Camera

The operational basics of a digital camera are similar to the workings of a manually operated camera, either automatic or semiautomatic. The basic difference in the method of operation lies in the way the image is stored and the number of images that can be stored in the device. With 35 mm manual cameras, the film roll used can store up to 36 images. Also, if the photograph does not meet expectations, it cannot be deleted or overwritten. You need to rewind the roll and insert another film roll to take additional images. However, the digital camera makes use of a memory card. The number of images that can be stored on this card varies according to its memory capacity. Also, you have the luxury of deleting the electronically stored images if you do not like them.

The Technology Behind Image Storage

When a picture is taken using a digital camera, light is reflected from the lenses and falls upon a digital sensor. These sensors are nothing but computer chips, called CCD, CMOS, etc., depending on the technology used by the camera. The term megapixels is a measure of the number of sensor elements of the camera. The higher the number of megapixels, the better the resolution of the electronic picture.

How Camera Resolution Affects Printing

For a decent-quality image of 4 6 size, you need a camera with a resolution of at least 2 megapixels. For a bigger picture, it is best to go for a camera that has a higher resolution. If you choose to print an image with low resolution on a bigger canvas size, the image processor will try to print it by stretching the image to fit the required size. This is referred to as interpolation. However, doing so degrades the quality of the picture. Hence, it is best to choose a higher-resolution camera.