imagemagick users.. better thumbnails? - GoFuckYourself.com

Brujah · 07-29-2006, 11:46 AM

what options do you use with imagemagick to crank out better thumbnails? i'd like to brighten and maybe sharpen up some dull looking thumbnails with imagemagick.

do you have a preference on thumb sizes, when you create yours?
do you go with perfect landscape or portrait thumbs and auto crop center?

digifan · 07-29-2006, 11:57 AM

Imagemagick filters can do better thumbs than photoshop... and smaller in size, I recommend it.

CamsLord · 07-29-2006, 12:01 PM

imagemagick works great along agsql

woj · 07-29-2006, 12:04 PM

-quality -sharpen etc, just look in the man page

tenderobject · 07-29-2006, 12:10 PM

Quote:

Originally Posted by CamsLord

imagemagick works great along agsql

what the scammer said!

Tempest · 07-29-2006, 12:33 PM

I haven't quite figured out all the things one could do with imagemagick, but a couple things I use are
-filter Lanczos - I "think" this gets you better quality on resizing but not sure)
-gamma # - like brightening but in some cases a bit better
-sharpen # - to sharpen it up

-quality is just the compression quality for saving to jpg

I've been using "composite" to build thumbs with text on them in bulk and it may be possible to do some other things.. for example, make a copy of the thumb, blur it out and then layer it on top with an opacity. Haven't investigated that yet though

haven't played with these yet
-contrast
-level
-modulate

everestcash · 07-29-2006, 12:47 PM

I tried many but prefer the following filter for thumbnail postprocessing
-unsharp 1.0x1.0+0.5 -unsharp 1.0x1.0+0.5 -quality 95
if you are worried about traffic reduce quality to 80
usually 120*160 thumbs are about 8-9kb with this command line

Brujah · 07-29-2006, 01:48 PM

I've got something like this so far.. I'm cropping so all thumbs are the exact same size. I haven't settled on 135x180 yet.

Images where width is equal or larger than height:

Code:

convert original.jpg \
-size 720x720 -thumbnail x360 -resize '360x<' -resize 50% \
-gravity center -crop 135x180+0+0 +repage \
-antialias -unsharp 1x1+.05 \
-normalize -contrast -gamma 1.4 -quality 95 \
thumbnail.jpg

Images where height is equal or larger than width:

Code:

convert original.jpg \
-size 720x720 -thumbnail x360 -resize '360x>' -resize 50% \
-gravity center -crop 135x180+0+0 +repage \
-antialias -unsharp 1x1+.05 \
-normalize -contrast -gamma 1.4 -quality 95 \
thumbnail.jpg

07-29-2006, 11:46 AM	#1
Brujah Beer Money Baron Industry Role: Join Date: Jan 2001 Location: brujah / gmail Posts: 22,157	imagemagick users.. better thumbnails? what options do you use with imagemagick to crank out better thumbnails? i'd like to brighten and maybe sharpen up some dull looking thumbnails with imagemagick. do you have a preference on thumb sizes, when you create yours? do you go with perfect landscape or portrait thumbs and auto crop center? __________________ Free Premium Domain Lists and Tools at Clickmojo.com For Sale: Obscenity.com

07-29-2006, 11:57 AM	#2
digifan The Profiler Industry Role: Join Date: Oct 2002 Location: ICQ 76281726 and I'm female Posts: 14,618	Imagemagick filters can do better thumbs than photoshop... and smaller in size, I recommend it. __________________ [email protected] Webair Rocks

07-29-2006, 12:01 PM	#3
CamsLord Confirmed User Join Date: Jun 2006 Posts: 3,663	imagemagick works great along agsql __________________ sig for sale - pornpicz(at)gmail.com

07-29-2006, 12:04 PM	#4
woj <&(©¿©)&> Industry Role: Join Date: Jul 2002 Location: Chicago Posts: 47,882	-quality -sharpen etc, just look in the man page __________________ Custom Software Development, email: woj#at#wojfun#.#com to discuss details or skype: wojl2000 or gchat: wojfun or telegram: wojl2000 Affiliate program tools: Hosted Galleries Manager Banner Manager Video Manager Wordpress Affiliate Plugin Pic/Movie of the Day Fansign Generator Zip Manager

07-29-2006, 12:47 PM	#7
everestcash Confirmed User Join Date: Apr 2002 Posts: 2,194	I tried many but prefer the following filter for thumbnail postprocessing -unsharp 1.0x1.0+0.5 -unsharp 1.0x1.0+0.5 -quality 95 if you are worried about traffic reduce quality to 80 usually 120160 thumbs are about 8-9kb with this command line __________________ Got solo girls/teen traffic? Promote our exclusive solo girl sites and boost your income!*

07-29-2006, 12:33 PM	#6
Tempest Too lazy to set a custom title Industry Role: Join Date: May 2004 Location: West Coast, Canada. Posts: 10,217	I haven't quite figured out all the things one could do with imagemagick, but a couple things I use are -filter Lanczos - I "think" this gets you better quality on resizing but not sure) -gamma # - like brightening but in some cases a bit better -sharpen # - to sharpen it up -quality is just the compression quality for saving to jpg I've been using "composite" to build thumbs with text on them in bulk and it may be possible to do some other things.. for example, make a copy of the thumb, blur it out and then layer it on top with an opacity. Haven't investigated that yet though haven't played with these yet -contrast -level -modulate

07-29-2006, 01:48 PM	#8
Brujah Beer Money Baron Industry Role: Join Date: Jan 2001 Location: brujah / gmail Posts: 22,157	I've got something like this so far.. I'm cropping so all thumbs are the exact same size. I haven't settled on 135x180 yet. Images where width is equal or larger than height: Code: convert original.jpg \ -size 720x720 -thumbnail x360 -resize '360x<' -resize 50% \ -gravity center -crop 135x180+0+0 +repage \ -antialias -unsharp 1x1+.05 \ -normalize -contrast -gamma 1.4 -quality 95 \ thumbnail.jpg Images where height is equal or larger than width: Code: convert original.jpg \ -size 720x720 -thumbnail x360 -resize '360x>' -resize 50% \ -gravity center -crop 135x180+0+0 +repage \ -antialias -unsharp 1x1+.05 \ -normalize -contrast -gamma 1.4 -quality 95 \ thumbnail.jpg __________________ Free Premium Domain Lists and Tools at Clickmojo.com For Sale: Obscenity.com