digital image sizes

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The original image was 2272 pixels wide by 1704 pixels high. Digital images are measured in pixels which can be thought of as a bit like squares of information which comprise the whole scene. That’s about 4 million pixels. Each individual pixel can hold a range of further information. For this image over 10Mb of storage would be required to preserve all the image information.


The small flower would, in fact, fill an A4 sheet on its own

So it’s not much help for e-learning. It needs reducing – not just in physical dimensions but in the amount of information stored. This process is called compression. Luckily, image editing programs can do this easily for you. In fact, most images from digital cameras will have a certain amount of compression already. This one’s compressed file size was 607Kb but that’s still too big and the physical dimensions were still the same.

 

There are basically two things to do: reduce huge image dimensions to a size that will be a bit more suitable for what you need and reduce the file storage space the copy you and others will use takes up by compressing or diminishing its quality.

To print this image without adjustment would take 12 sheets of A4 paper

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page updated by Andrew Hill, Dunstable College 23 July, 2006