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JOWBR Photograph Guidelines
The following guidelines should provide enough information to enable you to produce pictures which will be used in the JOWBR Project.
Our aim is produce a picture that it legible and meets the following specifications:
If you have existing photographs and you intend to scan them, here are some guidelines:
Using a Digital Camera
Photographing stones with a Digital Camera is not to different from using a camera that uses a film, the same basic rules apply:
Digital Cameras refer to the quality / standard of pictures possible in Megapixels. A camera rate at 1 Megapixel will be sufficient. If itís higher, that is not a problem. At this stage you should be aiming to take as high a quality picture as possible (you donít want to revisit) but bear in mind the higher quality the picture the more space it will require on the memory card / stick. Many cameras will let you change the quality of the pictures you take and if you can change the size then, ideally, go for 1024 x 768. Try these setting out at home before you start photographing the cemetery.
Saving the files
The pictures from either your scanner, camera, or other source need to be JPEG Format. Bitmap, Gif, PDF, etc. are not acceptable formats for this particular project. Most image programs will allow conversion between formats if required.
JPEG is known as a lossy image compression technique: you end up with a much reduced filesize, but some information has been discarded.
This is controlled by the JPEG quality setting in the program. Basically, the larger the number, the higher the quality and the larger the output file. Although it typically holds values between 1 and 100, it is NOT a percentage! Even with the quality set to 100 you're going to lose some information; that is the way JPEG works.
So, what quality setting to use? This is very much "suck it and see": it will vary depending on the image being processed (i.e. whether it's sharp to begin with, or contains text which must be readable in the final image) and how much of a trade-off you wish to make between image quality and file size.
Last Update: 26 Aug 2003 WSB.