[magick-users] convert utility

[Fred Weinhaus]

Several problems here. First of all you say you are converting a tif 
to jpg, but all you show are tifs in your command.

Second, I don't know about the -identify in the command line. Never 
used it that way.

But mainly, you are on Q16, so if you had an 8-bit per pixel (per 
channel) image to start, you now have a 16-bit per pixel (per 
channel) result.

Try

convert cd.tif -depth 8 cd1.tif

then

identify cd.tif
identify cd1.tif

or

compare -metric rmse cd.tif cd1.tif null:


Or compile IM as Q8 rather than Q16








>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.