Image resolution in the digital world refers to the amount of detail or information contained in your image file. Higher resolution = more detail = better quality (and larger file size). That is a pretty basic and simple explanation for more visit this wiki article.
Here are some tips that may help you along your way:
- You can always reduce the size of the image without sacrificing the quality.
- You can never enlarge the size of the image without sacrificing the quality.
- For photos, set your camera to the Large or highest setting to get the best quality prints.
- If your graphic designer is providing you with a .jpg file of your logo make sure it is large or have them give you several sizes.
- If you want to print your images you need at least 300 dpi (dots per inch) at the size you want it to print. This includes photos, print ads, logos, etc.
- For web images 72 dpi is fine and all images should be optimized for the web so that they load quickly.