How to prepare Projected Digital Images (PDI’s)

Mark Allen


I have been asked to show folk how to do this many times. At the time it all looks so simple and straightforward. Two weeks later folk have forgotten and therefore this short tutorial is offered as an aide memoire.



Modern digital cameras produce large images, in pixel dimensions the D300 produces images at 4352 x 2868. If you want to submit such an image to a PDI competition or make an Audio Visual you will have to make each smaller.

At Bangor and North Down Camera Club we use 1400 x 1050 for PDI. In the past many folk liked to use 1024 x 768 for Audio Visuals, however more and more are now going for the larger 1400 x 1050.

So, how is it done?

There are three stages, preparing your image, resizing for pixel dimensions and re resizing for file size. It is these last two steps that tend to get folk confused. It is my experience, from talking to folk who have difficulty in getting their head around this, that they try to do both at the same time and get lost. Therefore; I suggest a simple 3 step approach..............

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