The terminology of digital photography can be very complicated, but it is necessary to understand the basic principles, so that you will be able to work with a digital camera
All digital images consist of miniature blocks which is known as pixels (picture elements)
All pixels stores the information of the color and strength and also determines how dark or light a pixel will be. These 3 elements are also known as the Hue, Saturation and Brightness (HSB)
Hue, Saturation and Brightness
Digital images consist of millions of pixels and are so small that the human eye cannot distinguish between it. If we look at a digital image, we can see the difference in light, shadows and color tones.
The total pixels in an image are determined by the resolution (the detail) in the image. The more pixels, the higher the resolution (quality)
The amount of pixels in an image, also tells us how big that image can be printed. That is why the resolution is one of the most important factors of getting a good quality picture.
The resolution of the digital image is measured in pixels per inch (ppi) and the standard for a photo is 300ppi.
For example: A 6mp camera’s sensor is about 2,816 pixels x 2,112 pixels = 6 million pixels. The largest photo that can be printed from these images, can be determined if we divide 300 into 2,816 and 2,112. Die image that can be printed from this is 24 x 18 centimeters.
Almost all images in a digital image is put together using a combination of the 3 primary colors: Red, Green and Blue (RGB)
Below is the RGB color model of the primary colors of digital photography.
Each of the primary colors can give 256 different shade s from 0 – 255 and is known as channels.
A typical image that can show up to 16,7 million colors, is described as 8 bits per channel or 24 bits per channel.
Pictures with different resolutions
