Re-Post: ‘Exposure Guide’

Resolution is a common word when you enter the digital photography realm. It can be a tricky and confusing topic, as each item in the photographic chain has its own relative resolution value that isn’t interchangeable with the next item. But once you understand what is being measured, you can plan accordingly.

image-resolution-and-camera-resolution

Millions of pixels that make up the image sensor in a digital camera are actually tiny light-sensitive squares. Each pixel registers the brightness of the light striking it, when you click a snapshot. These pixels in a photograph cannot be identified unless you magnify a digital image. On enlarging an image, you will find that the whole picture is a web of inter-connected lines known as rows and columns forming small boxes or squares filled with colors. These boxes are known as the pixels. Resolution is the camera’s ability to classify and effectively present discrete image information, such as details, patterns and textures within a given photographic image and it corresponds to how large a photo can become without becoming unacceptably blurry or grainy. Camera and image resolution is measured in Pixels Per Inch or PPI.

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http://www.exposureguide.com/resolution.htm