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  #1 (permalink)  
Old 13th September, 2007, 04:34 AM
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File Format

what file format would you say is the best for storing photos on a laptop?
small, 20G hdd, mostly for viewing and transfer to cd/dvd.

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Old 13th September, 2007, 10:22 AM
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Storing for what purpose?
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Old 13th September, 2007, 11:57 AM
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If they are digital photos, the best would be the format they were taken in. Preferably in a raw image format (whatever file ext it uses).

If you are scanning, you want a decent scanner (preferably one that does negatives), use as high resolution as possible, and again in a raw image format.

But it depends what they are for, how many you want to put on the HDD, what quality you want them at, basically the scale goes something like:

Raw format (has many different file formats) Raw image format - Wikipedia
TIFF
PNG
JPG

But a good jpg can look better than a bad tiff.
Changing formats, in whichever direction only results in data loss.
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Old 13th September, 2007, 12:06 PM
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If it's only viewing, then PNG or JPG will be fine, probably the former.
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Old 17th September, 2007, 12:11 AM
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Most cameras will store images as .jpg files. If they are .jpg files, then converting them to another format, will in most cases be pointless.
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Old 26th September, 2007, 08:00 PM
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Just remember that TIFF files are incredibly large, and thus difficult to use.
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Old 27th September, 2007, 09:43 AM
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TIFF files are somewhat misunderstood. They are not necessarily incredibly large (unless you happen to have code written by a lazy developer). There's nothing to stop a TIFF file from being as small as a JPEG file. The size of the TIFF file depends on who implemented the routines that create the TIFF file - Some developers decide that implementing compression is too much work, so they just write routines that put uncompressed data in the TIFF file. Unsurprisingly those files are rather large.
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Old 27th September, 2007, 12:57 PM
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I have a DSC-V1, it uses tiff format for its uncompressed format, not a RAW format.

While a jpg may be ~3MB, the tiff can be close to 15MB for the same photo (It generates bith when tiff selected).
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Old 27th September, 2007, 01:34 PM
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RAW isn't the same as uncompressed though. RAW files are a dump of the sensor data prior to any processing that the camera would normally do. The camera does a lot of processing, such as demosaicing from the sensor's Bayer pattern, as well as sharpening and compensating the image.

The DSC-V1 in TIFF mode still does the processing, and then writes it to a TIFF file rather than a JPEG file. Which, I guess, makes it a bit pointless?
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Old 28th September, 2007, 02:10 AM
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probably is, but no jpeg noise in the tiff, makes it a better format when using it for insurance purposes.
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