On Tue, Nov 18, 2008 at 04:46:04PM -0800, Carl Davis wrote:
> I have installed ImageMagick 6.4.5-Q16 and used the convert.exe program
> to do some simple conversions. Basically, I have converted a .tif file
> to .jpg.
>
> My questions:
>
> Starting with a file cd.tif at 3,747K, just running the following
> command:
>
> Convert -identify cd.tif cd1.tif
>
> The ending file sizes are:
>
> cd.tif 3747K
>
> cd1.tif 54,796K
>
>
>
> Why is cd1.tif a full order of magnitude larger than cd.tif? No actual
> conversion was completed, besides both files are .tif.
There is really not enough information here. You could try using a program
like tiffinfo from libtif. Here's a short extract from Wikipedia's entry on
TIFF that might give you some ideas..
The TIFF is a flexible, adaptable file format for handling images and data
within a single file, by including the header tags (size, definition,
image-data arrangement, applied image compression) defining the image's
geometry. For example, a TIFF can be a container file holding compressed
JPEG and RLE (run-length encoding) images. A TIFF also can include a
vector-based Clipping path (outlines, croppings, image frames). The
ability to store image data in a lossless format makes the TIFF file a
useful image archive, because, unlike standard JPEG files, the TIFF using
lossless compression (or none) may be edited and re-saved without losing
image quality; other TIFF options are layers and pages.
Regards,
Karl
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