Sharpen images with Perl and GIMP
Installation
To tell GIMP to parse the smartsharp script when it launches, you must install the script in GIMP's plugin directory with the following command line:
gimptool-2.0 --install-bin smartsharp
The gimptool-2.0 utility is provided by the Debian libgimp2.0-dev package. So that GIMP can understand Perl scripts, you also need to install libgimp2.0 and libgimp-perl.
Significant Order
If you are changing the image in any other way, resizing, or correcting the colors, make sure that sharpening is the last step you perform. Otherwise, the various methods could step on each other's toes and possibly even reverse the sharpening process.
Of course, if an image is badly out of focus, no kind of manipulation is going to make a mega-sharp masterpiece of it; techniques like the tricks I cover here in this article are just patchwork. Out-of-focus images contain less information than sharp images – removing information from an image is easy, but adding information is just about as difficult as getting toothpaste back into the tube.
Infos
- Listings: http://www.linux-magazine.com/Resources/Article-Code
- The Digital Photography Book by Scott Kelby: http://www.kelbytraining.com/books/
« Previous 1 2
Buy Linux Magazine
US / Canada
UK / Australia
Direct Download
Read full article as PDF:
News
-
Old Vulnerabilities Are Kept Alive Through Bad Configuration
HP's annual Cyber Risk report offers a bleak look at the state of IT.
-
Linus Torvalds Announces Linux 4.0
But what do the big numbers really mean?
-
Microsoft Frees CoreCLR
.NET Core execution engine is the basis for cross-platform .NET implementations.
-
New Trojan Attacks Linux Servers
The Xnote trojan hides itself on the target system and will launch a variety of attacks on command.
-
Cisco Releases Annual Security Report
Spammers go low-volume, and 90% of IE browsers are unpatched.
-
Zero Day Exploits Target Flash
Adobe scrambles to release patches for vulnerable Flash Player.
-
Intel Unveils Compute Stick
Four-inch-long computer on a stick lets you boot a full Linux system from any HDMI display device.
-
Obama Proposes Personal Data Notification Law
New statute would require companies to report break-ins to consumers.
-
TGXf Project Warns of File Transfer through Screen Pixels
Weird data transfer technique avoids all standard security measures.
-
Industry Giants Announce a Fix for the Password Mess
FIDO alliance declares the beginning of the end for old-style login authentication.