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HTTP/2 302 server: nginx date: Tue, 05 Aug 2025 03:02:34 GMT content-type: text/plain; charset=utf-8 content-length: 0 x-archive-redirect-reason: found capture at 20081222045438 location: https://web.archive.org/web/20081222045438/https://refocus.sourceforge.net/ server-timing: captures_list;dur=0.624733, exclusion.robots;dur=0.023846, exclusion.robots.policy;dur=0.010669, esindex;dur=0.011349, cdx.remote;dur=26.961207, LoadShardBlock;dur=129.783088, PetaboxLoader3.datanode;dur=61.494615 x-app-server: wwwb-app222 x-ts: 302 x-tr: 185 server-timing: TR;dur=0,Tw;dur=0,Tc;dur=0 set-cookie: wb-p-SERVER=wwwb-app222; path=/ x-location: All x-rl: 0 x-na: 0 x-page-cache: MISS server-timing: MISS x-nid: DigitalOcean referrer-policy: no-referrer-when-downgrade permissions-policy: interest-cohort=() HTTP/2 200 server: nginx date: Tue, 05 Aug 2025 03:02:34 GMT content-type: text/html x-archive-orig-server: nginx/0.6.31 x-archive-orig-date: Mon, 22 Dec 2008 04:54:38 GMT x-archive-orig-connection: close x-archive-orig-last-modified: Wed, 11 Jun 2003 11:54:05 GMT x-archive-orig-etag: "14b3-3bfd1bb811140" x-archive-orig-accept-ranges: bytes x-archive-orig-content-length: 5299 x-archive-orig-cache-control: max-age=172800 x-archive-orig-expires: Wed, 24 Dec 2008 04:54:38 GMT x-archive-guessed-content-type: text/html x-archive-guessed-charset: iso-8859-1 memento-datetime: Mon, 22 Dec 2008 04:54:38 GMT link: ; rel="original", ; rel="timemap"; type="application/link-format", ; rel="timegate", ; rel="first memento"; datetime="Sat, 08 Feb 2003 11:21:20 GMT", ; rel="prev memento"; datetime="Sat, 10 May 2008 03:16:42 GMT", ; rel="memento"; datetime="Mon, 22 Dec 2008 04:54:38 GMT", ; rel="next memento"; datetime="Tue, 03 Feb 2009 02:24:31 GMT", ; rel="last memento"; datetime="Sun, 30 Mar 2025 00:13:00 GMT" content-security-policy: default-src 'self' 'unsafe-eval' 'unsafe-inline' data: blob: archive.org web.archive.org web-static.archive.org wayback-api.archive.org athena.archive.org analytics.archive.org pragma.archivelab.org wwwb-events.archive.org x-archive-src: 51_7_20081222021213_crawl101-c/51_7_20081222043541_crawl106.arc.gz server-timing: captures_list;dur=0.775486, exclusion.robots;dur=0.036068, exclusion.robots.policy;dur=0.018252, esindex;dur=0.017010, cdx.remote;dur=80.914427, LoadShardBlock;dur=125.225484, PetaboxLoader3.datanode;dur=178.433936, load_resource;dur=138.185848, PetaboxLoader3.resolve;dur=45.841224 x-app-server: wwwb-app222 x-ts: 200 x-tr: 387 server-timing: TR;dur=0,Tw;dur=0,Tc;dur=0 x-location: All x-rl: 0 x-na: 0 x-page-cache: MISS server-timing: MISS x-nid: DigitalOcean referrer-policy: no-referrer-when-downgrade permissions-policy: interest-cohort=() content-encoding: gzip Refocus Home Page

Introduction

Refocus

Wilber unsharp Wilber refocussed

Introduction

During image processing operations such as scanning and scaling, images tend to get blurry. The blurred impression of these images is due to the fact that image pixels are averaged with their neighbors. Blurred images don't have sharp boundaries and look as though they have been taken with an unfocussed camera.

Refocus is a plug-in for the Gimp (the GNU Image Manipulation Program). This plug-in attempts to "refocus" the image, using a technique called FIR Wiener filtering. The traditional technique for sharpening images is to use unsharp masking. Refocus generally produces better results than unsharp masking.

The plug-in comes with a preview that helps you select the best parameters.