1. ARCHIVE (camera capture file)

2. MASTER (corrected & adjusted)

3. MR SID (wavelet compressed)

4. ‘LARGE’ (full-frame P’Point)

5. ‘SMALL’ (1/2 frame P’Point)

6. PREVIEW

7. THUMBNAIL

Full Plate ImageFull Plate Image File ExamplesFile Examples

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Camera files are archived with acquisition settings

Master files are archived

Derivatives are backed up and transferred to AMF computer

Process overview for DM image capture

Digital Camera capture, direct to computer

Files transferred to BH

Camera named file referenced to AMF filename

Images acquired at 12 bits per channel

File derivatives are produced

MrSid Preview & Thumbnail for

database“Large” and “Small” for

downloading

AMF review output

Problem files re-processed

Images processed to “master” specification

Bridgehead Australia1/259 Glen Osmond Rd., Frewville. SA 5063Ph: 61-8 8379 5499 Fax: 61-8 8379 6933

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File specifications for DM

Digital Camera capture file• 12 bits per channel• 3072 x 2049 pixels

File derivatives are produced

MrSid is produced:• Master file is sharpened and

then compressed to 20x, with ’normal’ settings in MrSID-Compress for RGB colour.

Generation of Master file:Acquired file is corrected for colour and brightness

range, trimmed and resampled to 3,000 pixels from top to bottom of plate. Horizontal dimension will be fixed for all plate files.

File is saved as TIFF, unsharpened, RGB

Preview & Thumbnail for database:

• Master is resampled for each Sharpening is applied to each set to best suit 24 bit colour monitor display.

• Files are compressed using JPG with a balance of speed and quality in mind.

“Large” and “Small” for downloading:

• Large file is 700 pixels high• Small file is 350 pixels high• Images are each generated

directly from the Master.• Sharpening and JPG

compression are optimised for PowerPoint display.

MrSid file:Placed on web-delivered

database for downloading and viewing on a local MrSid viewer.

Preview & Thumbnail:• Thumbnail for fast display in

search results.• Preview for verification of

result.

Large & Small files:• Either file would be chosen

following a search.• Large is suitable for full

screen PowerPoint use• Small is suitable for up to ½

screen PowerPoint use.

Bridgehead Australia1/259 Glen Osmond Rd., Frewville. SA 5063Ph: 61-8 8379 5499 Fax: 61-8 8379 6933

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