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Digitizing educational material

Digitizing educational material

1. Text:

 

The text is usually already in digital form as a Microsoft Word file or PowerPoint presentation or as a text file from other office programs. It is therefore easy to export the text as web content.  Simply use the copy and paste command to import these files into any web composer.

2. Images:

 

Images can be photos or plain film or CT, ultrasonography, MRI, scitigraphy films.  All this material must be converted to jpg or gif image files.  The conversion may be easy if the files  are already in digital Dicom form.  Free image manipulation programs like Image J are able to convert Dicom into jpg or gif files.  If the images are analog, e.g. films, digital cameras or scanners can be used to reproduce the images in digital form as jpg image files.  We use digital cameras ( Nikon Coolpix 995 to 5000) for pictures of material and interventional procedures.  We use the same cameras for CT, ultrasonography, MRI films.  Some plain old  film X-ray images need to be converted into digital form with a scanner but this procedure takes more time.

3. Other material:

 

Video films also have  to be converted into digital files.  New compression standards have drastically reduced  the size of these digital movies.  These standards are MEPG4 and DIVX.  Only these compression techniques have made it possible to publish good quality video material on the internet.  The video editing tools we use for movies are Adobe Premiere and Virtual Dub.  DIVX or MEPG4 compression codec are needed by the computer operating system to produce and to play such movies.  These tools are able to produce high quality movies.  Soundtracks can be published on the web by using the popular MP3 compression standard.  3D models can be published on the web, e.g. in VRML standard.

Figure 1a. Computer, PC station.

Figure 1b. Digital camera.

Figure 1c. Scanner with transparency adapter.