Below are instructions on how to resize images, using either free software or Photoshop. These replace the previous notes to reflect the fact that the club has updated its projector. Sizes for both internal club competitions and external competitions are now the same: dimensions of 1400 by 1050 pixels at a resolution of 300. (The process is similar for resizing for printing, although you will work in centimetres instead of pixels).
Images for projection must be jpegs, and the instructions for converting to jpeg are also below. Every time you work on a jpeg and resave it, it loses quality (it is a 'lossy' format). It is better to shoot raw in your camera, or save your images as tiff or psd if you can only shoot jpeg and know you are going to work on them. In any case, you should always work on a copy!
1400 pixels by 1050 pixels is an aspect ratio of 4:3. Your image may not be this shape -- most DSLRs produce a 3:2 image -- but this doesn't matter. If it is a different shape, it will be projected with space around it. 1400 is the maximum width and 1050 the maximum height. A portrait image will be 1050 pixels high, but (obviously) less than 1400 wide:it will project with space on each side. A letterbox-type landscape image will be 1400 pixels wide, but could be less than 1050 high, so would have space above and below when projected. A square image will be 1050 x 1050 with space on each side when projected. Always check height and width to make sure they fall within the 1400 by 1050 limit.
There is a wide choice of software available, from the free, but relatively limited (in terms of editing facilities), to the all-singing, all-dancing, but expensive, Photoshop. (Photoshop Elements is a slimmed-down version of Photoshop at a more reasonable price.) Below are notes on performing re-sizing in software from both ends of the range: Photoshop (or Elements) and, first, Irfanview.
Irfanview (www.irfanview.com) is free, well-regarded software that allows a certain amount of editing (cropping, rotating, auto colour-correction etc) and with the free plug-ins you can even work directly from RAW files. Re-sizing is simplicity itself.
If you are using Photoshop or PS Elements you can resize the image by doing the following:
If you think the image could do with a little sharpening, do it now; however, this should not be overdone. Look at your image at 100% to check the results and pay attention to areas where light and dark parts of the image meet. Once you are happy with it you now have to save your image as a jpeg.
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