Preparing a PDI for Competition

A few general reminders before you start:

  • All entries must be in jpg/JPEG format, using sRGB colour space. The maximum image size dimensions should be either 1600 pixels wide or 1200 pixels high. There is no longer any need to fill the edges of the image to create the overall display dimensions of 1600 x 1200 pixels, as this is handled by the competition software.
  • Don’t forget to name your file correctly with the competition, your group, membership number and the image title e.g. OD2_B_025_my image title.jpg. Details on file naming are available on the Competition Rules
  • You can submit your image by uploading to the LSAPS web site, or by copying to a CD/Memory stick to hand in on the due date. Upload to the LSAPS website is now the preferred method.

Whilst Photoshop & Elements are the standard editing software for resizing prints, you may also be able to adapt other software (such as Paintshop Pro) to do the same thing. However, the instructions provided below only refer to Photoshop & Elements.

  1. Create a copy of your original image as re-sizing will reduce the quality and you may want to do more work on it in the future.
  2. Open your image and using the menu at the top of the screen, go to ‘Image’ & then select ‘image size’ from the drop down menu.
  3. A box will open on your screen. Ensure ‘constrain proportions’ is ticked.
  4. For a landscape format image, change the width to 1600 pixels. The height should automatically change to 1200 pixels or less. Click OK.
  5. For a portrait format image, follow steps 1 -3 above then change the height to 1200 pixels. The width should change to 1600 pixels or less. Click OK.

If you are not using sRGB colour space as default, convert the image to sRGB by selecting Edit–>Convert To Profile and select the Destination Space as sRGB.

Save your image as a jpg/jpeg file specifying a compression level of between 10 and 12.  The image should be about 1 to 2MB in size.  Anything smaller means the image quality is being degraded.


For Reference

Although there is no longer a requirement to create a border to achieve 1600 x 1200 pixel display dimensions, it is worth mentioning what the process is, should it be required for other reasons. In that case, you would now need to change the canvas size.

Go to ‘Image’ again but this time select ‘canvas size’ from the drop down menu.

Set the ‘canvas extension colour’ (i.e. the background colour) to black.

Set the size to 1600 pixels wide and 1200 pixels high. Click OK.

You would now have a 1600 x 1200 pixel image with a black border if the image initially did not fill the frame. Remember that the final image would be the same shape and proportions as an old 4:3 TV – i.e. it should be wider than it is high.