Legacy ImageMagick Discussions Archive

Greetings, all.

I'm using the CONVERT CLI to convert a PDF to TIFF. It works but the quality of the resulting TIFF leaves a bit to be desired. It's rather grainy/pixelated especially when zoomed in a couple of times. I've tried the -quality 100 parameter to no avail. What else can I do to have the resulting TIFF as clear as possible?

Thanks!

Try the "-density" setting.

Thanks. I'm able to improve the quality but there's an issue whereby the FileNet IDM viewer displays a blank screen when I try to open my converted TIF.

I downloaded a TIF from FileNet and compared the two. Here are the differences:

"GOOD" TIF (downloaded from FileNet IDM Image Viewer)
Dimensions: 1699x2200
Horz. Res.: 200dpi
Vert. Res.: 200dpi
Bit Depth: 1
Compression: CCITT T.6
Resolution Unit: 2

"BAD" TIF (converted w/ ImageMagick from PDF)
Dimensions: 1700x2200
Horz.Res.: 200dpi
Vert. Res.: 200 dpi
Bit Depth: 64
Compression: Uncompressed
Resolution Unit: 1

Assuming that somewhere within these differences lies the problem how can I get CONVERT.EXE to match these specs?

Thanks!

You haven't said what version of IM you are using, or posted a link to your input PDF or output TIFF, or shown the IM command you used.

How do you think we can guess?

Unfortunately I cannot share the PDF/TIFF because it contains sensitive information. However, I found something that worked perfectly. First, I switched to GhostScript and used the "tiffg4" device (sDEVICE=tiffg4) and that got me EXACTLY what I wanted.