Preparing Images for DPI Submission

 

Here we take you through the process of preparing your digital images (DPIs) for submission to competitions in accordance with the Society's rules.

Overview

 

TPS uses software to prepare, project and score DPIs. To ensure images are projected correctly, members need to prepare and submit their images in a standard format. Images are projected on a black background.

The following information has been extracted from PhotoEntry FAQ:
 

How do I export with the correct dimensions and colour space from Lightroom?

In the Library view, click on "Export..." In the "File Settings" section:

  • Set "Image Format" to "JPEG".

  • Set "Quality" to 100.

  • Set "Color Space" to "sRGB".

  • Ensure "Limit File Size To:" is un-checked.

 

In the Image Sizing section:

  • Ensure "Resize to Fit" is checked.

  • Choose the "Width & Height" option.

  • Set the "W:" and "H:" values to e.g. 1600 and 1200, and the units to "pixels".

  • Set "Resolution" to 300 pixels per inch.

  • Ensure "Don't Enlarge" is checked.

 

You may then want to save those settings as a Preset (use the "Add" button below the Preset pane on the left). Note that setting both the width and the height is correct, irrespective of the image's aspect ratio. Lightroom will adjust both the height and the width together (maintaining the aspect ratio) ensuring that neither is too big.

How do I export with the correct dimensions and colour space from Photoshop (versions prior to Dec 2015)?

Note that this is for full Photoshop. For Photoshop Elements see below:

To correctly do the export directly from Photoshop is more fiddly than with Lightroom. There are several ways to do it, but none of them do all three of the things you want to (convert colour space, resize without having to manually tweak the dimensions, and export without risking changing the original). The following is one method. Once you have started, do not save the image or you may overwrite your original:

  • If you have been editing the image, ensure it is saved.

  • Click on "Edit\Convert to Profile". If the Source Space is already "sRGB IEC61966-2.1" just Cancel. Otherwise select "sRGB IEC61966-2.1" as the Destination Space. You will probably want to use Perceptual Intent, and Black Point Compensation.

  • Click OK, then review the image. If you are unhappy with the result, undo the conversion (Edit\Step Backward) and try with other options.

  • Click on "File\Automate\Fit Image...". Ensure the width and height are correct (normally 1400 and 1050 respectively). Select "Don't Enlarge" (you never want to up-size an image), then click OK. Note that, unlike elsewhere in Photoshop, this does not set the image size, it only limits each dimension individually so you don't have to manually jiggle the values until they fit. Photoshop remembers the values you last entered too.

  • Click on "File\Export\Export As...". Set the Format to "JPG", Quality to 100%, and verify the dimensions are now correct. Click on "Export..." and select where you want the exported image saved.

  • Click on "File\Close" and do not save the changes.

 

Don't use the "Assign Profile" option - it merely tells Photoshop the image is in a particular colour space without actually converting it! There is also a "File\Export\Save for Web (Legacy)" option which is obsolete and has problems.

How do I export with the correct dimensions and colour space from Photoshop (versions from Dec 2015)?

Note that this is for full Photoshop. For Photoshop Elements see below.

In Dec 2015 the export feature in Photoshop was enhanced to make this easier.

  • Click on "File\Export\Export As..."

  • Ensure Format is JPG, and Quality 100%.

  • You now need to manually tweak the dimensions. First try setting the Image Size Width to 1400. If the Image Size Height now exceeds 1050, set it to 1050 (the width should drop down accordingly).

  • Default resampling is Bicubic Automatic. Try this first and if not happy experiment with others.

  • Ensure "Convert to sRGB" is checked.

  • Click "Export All..." and select where you want the exported image saved.
     

How do I export with the correct dimensions and colour space from Photoshop Elements?

Note that this is for Photoshop Elements. For full Photoshop see above.

To correctly do the export directly from Photoshop Elements is more fiddly than with Lightroom. There are several ways to do it, but none of them do all three of the things you want to (convert colour space, resize without having to manually tweak the dimensions, and export without risking changing the original). The following is one method. Once you have started, do not save the image or you may overwrite your original:

  • If you have been editing the image, ensure it is saved.

  • Click on "Image\Convert Color Profile\Convert to sRGB Profile".

  • Click on "Image\Resize\Image Size...". Ensure that "Constrain Proportions" is checked, "Resample Image" is checked, and that "Bicubic" is selected in the bottom dropdown.

  • You now need to manually tweak the dimensions. First try setting the width to 1400 pixels. If the height now exceeds 1050, set it to 1050 (the width should drop down accordingly).

  • If you are in a 16-bit format (it says RGB/16 in the title) you need to convert to 8-bit before saving as a JPEG. Click on "Image\Mode\8 Bits/Channel".

  • Click on "Save As...", ensure you are saving as JPEG and select where you want the exported image saved.

  • Click on "File\Close" and do not save the changes.

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