Photography Courses Melbourne

Digital images are composed of tiny units called pixels. Each pixel is distinct with its own color and intensity. The pixels, or units of information, make up the image. The larger the image, the more pixels are needed to give the image the desired clarity, thus resulting in a higher resolution. For example, 3 megapixels can produce a good 4X6 image while you would need 5-6 megapixels to produce a good quality 9X10 image. For the average consumer, there is no need to buy a camera with 10 or more megapixels. These additional megapixels are used to produce very large prints to prevent excessive loss of quality.

Digital cameras offer a partial solution to common problems with blurring, indistinct or poorly focused pictures resulting from unintended hand movement. This image stabilization feature is built into the camera.

The zoom feature that digital cameras offer allows the user to get a closer shot. The digital zoom is an electronic process that crops the image and then enlarges the remaining photo. This results in decreased resolution because the number of pixels in the image has not increased. The optical zoom will utilize the lens to magnify the image to bring you closer. The optical zoom does not erode the quality of the image.

In digital photography, the ISO relates to the sensitivity of the image sensor to light. Lower ISO settings can be used in good lighting. When there is less lighting a higher ISO is needed.

There has been serious concern regarding the protection of online data as a result of problems with computer hacking. There are safety measures that you can take to protect your photographs on the computer.

One is digital watermarking, which is the process of embedding information into a digital signal that can be used to verify its authenticity along with the identity of the owners. The signal where the watermark is embedded is a host signal .A watermarking system is divided into three steps, embedding, attack and detection. If a person makes a modification to a stored watermarked digital signal that is an attack. Detection is when there is an attempt to extract the watermark. In visible digital watermarking, the information is visible in the picture or video in the form of a text or logo, which identifies the owner.

In most countries, including the US, your photos are copyrighted automatically when your photos appear online. However, under special circumstances, you can also file your photo with the US copyright office.

Another method is called hidden layers. This is when you place the actual image behind a transparent foreground image. The online image appears completely normal but it cannot be right clicked and saved. If they try, the result will be a blank foreground image.

You can disable right clicks by letting your visitors know that you are serious about image protection and when they try to save they will see a notice instead of save as.