Download the PDF help-sheet: Preparing

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preparing images for DPI competitions

Images for Digital Projected Image (PDI) competitions should be resized to the following dimensions:

Landscape format: 1400 pixels wide with a maximum height of 1050 pixels.

Portrait format: 1050 pixels high.

Square format: 1050 pixels on all sides.

Unusual Crop: apply a maximum height of 1050 pixels.

(Scroll down to see examples)

The colour space should be sRGB

The image should then be saved as a JPEG maximum quality.

RESIZING AN IMAGE IN PHOTOSHOP CS and PS ELEMENTS

To bring up the image resize dialogue box in in Photoshop CS the menu path is:
Image/Image Size/

In Elements it's:
Image/Resize/Image Size

The following tick boxes should be checked:
'Scale Sizes'
'Resample Image'
'Constrain Proportions' (see the 'chain' icon to the right of the Width & Height boxes. This must not show as a broken chain)

(Note: This is the same for both Photoshop and Elements - for help with resizing in Lightroom Click here

APPLYING THE sRGB PROFILE TO YOUR IMAGE

Our projector uses the sRGB colour space and therefore you should save the images using the sRGB colour profile.

The menu path in Photoshop CS is:
Edit/Convert to Profile/
Destination Space: sRGB

In PS Elements there are fewer options, the menu path is:

Image/Convert Color Profile/Convert to sRGB Profile.

Finally, save your image as a JPEG.

WHEN PREPARING A DIGITALLY PROJECTED IMAGE - ALWAYS THINK PIXELS!

When working on images for digital projection it's the Pixel Dimensions that matter, so ignore Document Size (Width, Height and Resolution).

If you tried to print a 1400 pixels image on a high quality inkjet printer at anything bigger than postcard size it would look jagged and poor quality. The usual accepted resolution for desktop inkjet printing is 300dpi.

Image 1 (Landscape 1400 pixels wide)

DPI SIZING EXAMPLES

example

Image 2 (Portrait 1050 pixles high)

example1

NAMING AND SUBMITTING YOUR IMAGES

Starting in 2017, we have provided an online system called PhotoEntry for Members to use to upload their PDI entries for competitions and also, digital copies of their print entries. To use them, you will need the link and password which has been emailed to you. If you have any problems email our PDI Secretary.

The file name should be the name of the image, e.g. "Sunset Harbour.jpg" (no quotes). 

For step-by-step instructions on how to upload your JPEGs to PhotoEntry click here: LINK

DIGITAL PROJECTORS

Most digital competitions now display images on High Definition (HD) digitial projectors allowing images up to 1400 x 1050 pixels to be submitted, this format will probably prevail even though portrait format images are at a disadvantage. Here's a link to a PDF produced by the Scottish Photographic-Federation that helps explain projection resolutions.

You should be aware that if you fail to submit to the correct size, jagged edges may appear when the image is projected (so-called interpolation or compression artifacts) or some of the image may be arbitrarily cropped by the competition software. Also applying a colour space other than sRGB to an image may result in odd and unwanted colour effects.

Click on this link to download examples of correctly sized projectable image files:

Landscape (1400 pixels wide, with a maximum height of 1050 pixels)

Landscapearrow

Portrait: (1050 pixels high)

Portraitarrow

Square: (1050 pixels on all sides)

Squarepixels

Cropped image: (1050 pixels high)
The image below has been cropped almost square. If the image width was now set to 1400 pixels, the resulting height (with Constrained Proportions on) would be too high. So in this case we would set the height to the maximum 1050 pixels and the width will then be automatically reduced.

Croppedarrow

Images © M W Pinsent