Digital File Preparation Using Adobe Photoshop or Photoshop Elements

 

How to Re-size a JPEG file

 

All digital images will be judged at a resolution of 1600 x 1200 pixels. 1600 pixels is the maximum width of an image and 1200 pixels is the maximum height of an image. All images, whether landscape format or portrait format, must be constrained to these pixel dimensions. Images will be shown against a black background.

 

     1.  Open your image.

 

     2.  Photoshop users go to Image>Image Size. Photoshop Element users go to Image>Resize>Image Size. The Image

          Size dialogue box will appear on screen.

 

     3.   At the bottom of the Image Size box, tick all three boxes – that’s Scale Styles, Constrain Proportions and

           Re-sample Image. Use Bi-cubic (best for smooth gradients).

 

     4.   In the Pixel Dimensions section at the top of the box, change the units to show pixels.

 

     5.   Enter the width as 1600. The height will automatically adjust, maintaining the proportions of the image.

 

     6.   Before clicking OK, check the height in pixels. If the height is more than 1200, then you need to enter 1200 in the

           height – this will reduce the width to less than 1400 pixels. Click OK.

 

           NB  Several people talk about “file size” or “ppi” – none of this is relevant here, you are measuring in pixels only.

 

How to Change the Mode of an Image

 

      1. From the Image menu, choose Mode.

 

      2. Tick on both RGB and 8 bit/Channel so that a tick appears to their left. These may already be ticked and will not,

          therefore, need changing.

 

How to Convert Your Image to the SRGB Colour Space

 

      1. In newer versions of Photoshop go to Edit > Convert to Profile - as this produces the best result, if a change is

          required. In older version of Photoshop go to Image>Mode>Convert to Profile. The Convert to Profile dialogue box

          appears. At the top of the box, the Source Space, Profile needs to be SRGB IEC61966-2.1. If it is not, then a

          different profile may actually be attributed to the image. If the Source Space is not SRGB IEC61966-2.1 then select

          that profile from the Destination Space, Profile drop down box and click the OK box at top right, to convert the

          colour space.

 

      2. For Photoshop Elements users go to Image>Convert Colour Profile>Apply SRGB Profile. If the option is greyed out

          you don’t need to change anything here because SRGB is already selected.

 

How to Save Your Image as a JPEG File.

 

      1. From the File menu, choose Save As. The Save As dialogue box appears.

 

      2. Select the folder you want to save to. Type in your File name. For our programme to run smoothly, this file name

          (excluding .jpeg) must not be longer than 24 characters – a space between words counts as a character. Titles

          may be longer on the paper Titles List form but must be cut short at 24 characters for the digital file name. The title

          read out will be that from the Titles List form.

 

      3. Check that the Format field is set to JPEG.

 

      4. Click the Save button. The jpeg options dialogue box appears.

 

      5. Set the amount of compression to apply to your image. Set the quality to 12, this will ensure you will retain the

          quality of the image. Make sure the Format Options is set to Baseline (“Standard”).

 

     6.   Click OK.

 

Copyright © 2009-2018 East Anglian Federation of Photographic Societies. All rights reserved.