Expert Searching Techniques 

Trina:

Use creative words when keyword searching, use other fields beyond keyword, know the jargon of the discipline you’re searching, use the help feature.

The computer doesn’t know the difference between a venetian blind and a blind venetian

Boolean operator – AND, OR, ( ) …

http://www.csa.com/help/Search_Tools/boolean_operators.html

Controlled vocabulary – http://www.controlledvocabulary.com

David:

How we see colour – http://www.accessexcellence.org/AE/AEC/CC/vision_background.html

Gamut – actual range of colour we can create in a colour space (CMYK, RGB)

Colour space is device dependent, therefore each screen will project the colour numbers differently. A colour profile acts as a translator.

Use Adobe 1998b because it has a wider gamut than sRGB.

Bit Depth/Dynamic Range – use 16 bit whenever possible for digital capture, you will get a lot more detail in the shadow areas.

All digital cameras capture an analogue image, the camera them converts the analogue to digital using a converter.

Resolution = density of elements. Dependent on the viewing device or distance from image. The sample rate is a more accurate in determining image quality. (Scan at maximum resolution.)

72 dpi is not a standard screen resolution, it varies between devices. Each printer has its own optimal resolution,  300 dpi is not a standard.

Compression – 2 classes

Lossless compression- retains actual information from time of creation. Ideal especially for original scans and master images. (eg. TIFF)

Lossy compression – takes advantage of the inherent deterioration of the device it is viewed on. Sufficient for derivative files but not ideal as it uses average values and resampling. (eg. JPEG) Compression artifacts really show up in print.

File Formats – are problematic because they have not been around for long enough. Will you be able to read a TIFF in 50 years? Format obsolescence is a concern, as is material degradation. The only way to deal with this is to periodically transfer the data to newer formats. The hardware to access outdated formats is equally important!

RAW file format does not exist – only a proprietary file format  that needs a converter to be able to read it.