Digital Photography
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Which Camera?
Which Resolution?
Which Lens?
Which Memory?
How to Edit
Use in PowerPoint



How to Edit


  • Keep your original image file - create a new file of your modified image
  • The largest an image need be in a presentation is 1024 x 768 pixels in size
  • After changing the image size, try applying a sharpen filter to crispen it up
  • If doing complex editing (layers etc) save the file in the proprietary file format of the editing programme e.g. .psp for PaintShop Pro, or .psd for Photoshop, then export a .jpg file for presentation use
  • If you need the same image reproduced in an number of different sizes, save your finished master image in the loss-less TIF format and export the different version from this
  • Avoid saving and re-saving a jpg file. Every time you save it you lose some image quality - think of photocopying a photocopy of a photocopy ...

Once-upon-a-time is was said that a photograph did not lie. That has never really been true, especially with the advent of digital image manipulation software. Now it is easy for anyone to change colour, sharpness, add or remove elements and alter an image in any way they choose.

Photographs saved in RAW format from a professional camera can have their colour balance, sharpness and many other features altered without any degradation of image quality. For the majority of users the photographs will be saved in the popular jpeg or jpg format. This offers a full colour image, but compresses the image data.

A jpg image can be edited in a wide range of software costing nothing to many hundreds of pounds. This is not a digital photography master class, so I will keep to the point, which is how to optimise an original image for use in a presentation.

24 May, 2006

© Nigel Sadler 1995-2008

anti-spam email: nigel at herriott-sadler dot co dot uk
Location: Forest Row, East Sussex, England

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