Slide scanning TIFF or JPEG

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TIFF or JPEG

File format selection made a little easier.

Format	Characteristic
TIFF (Tagged Image File Format)	An uncompressed file. Highest quality. Produces largest size files. Best for use in editing. Best for printing Universal support in applications and computer platforms.
JPEG (Joint Photographic Experts Group)	A compressed file. High quality. Produces manageable size files. Editing...each/save operation the image deteriorates further because the compression scheme runs again. Not a good thing. Best format if all you plan to do is view, copy or make slideshows your digital slides. Use for PowerPoint images.

Read more about the JPEG format here.

Most image/graphics software will convert image files from one format to another.

Approximate Image File Size
	TIFF	JPEG
700 DPI	2 MB	680 KB
1400 DPI	8 MB	2.5 MB
2800 DPI	32 MB	11.1 MB
4000 DPI	66 MB	26.2 MB

Approximate Number of Scanned Images per CD
	TIFF	JPEG
700 DPI	350	1029
1400 DPI	87	280
2800 DPI	21	63
4000 DPI	10	26

Approximate Number of Scanned Images per DVD
	TIFF	JPEG
700 DPI	2100	6,176
1400 DPI	525	1,680
2800 DPI	131	378
4000 DPI	63	161

These values are approximations and can vary based on if the image is cropped or captured at full aperture of the scanner. JPEG file values are based on saving the file at the highest quality JPEG setting from the scanner. File size will vary based on the content of the image and how the JPEG algorithm will compress that content.

A value of 4.2GB usable space is used for DVDs in the approximations. Even though it has 4.7GB storage an overhead is used up in writing files and directories.

A value of 700MB is used for CD approximations.

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