Imagemagick - Best print quality from a TIF to JPG conversion.

[cesarcesar]

I am working with a TIF to JPG conversion that will result in the JPG being printed from a web page. My issue is the final JPG image prints VERY blurry.

 

The TIF file that has the following settings,

 

*plat.tif*

Pixel Dimensions - 9600x7200

Document Size - 24x18 inches

Resolution - 400 px/in

File Size - 236 KB

 

When using the command

exec("convert plat.tif -density 300x300 -quality 100 plat.jpg");

the code takes 63 seconds to run. Is this normal?

 

Then i run

exec("convert plat.jpg -resize 792x612 -quality 100 plat_resize.jpg");

to reduce the JPG to the PX size i need. the code takes 73 seconds to run. Is this normal?

 

When plat_resize.jpg is viewed in Firefox using a standard <img src> tag the image looks not as good as the original TIF, but "OK". Though, my final output is to print the image and this is where my main problem is. The printed image looks blurry and unreadable. How can i get it to look as good or as close to the original TIF as possible?

 

Here are the files being used and generated.

 

http://www.zellco.com/imagemagick/plat.tif

http://www.zellco.com/imagemagick/plat.jpg

http://www.zellco.com/imagemagick/plat_resize.jpg

http://www.zellco.com/imagemagick/plat_resized.html (image in page ready to print.)

 

Thank much for all the replies to come.

[gerkintrigg]

Probably the same problem as I'm having - controlling the resolution. By default the output is set to screen resolution - 72dpi.

 

Don't know how to resolve it though.

[Azu]

It looks to me like you are using an external program to convert it, not PHP.

Maybe this is a problem with that program, not PHP? o_O