optipng home page
optiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. This program also converts external formats (BMP, GIF, PNM and TIFF) to optimized PNG, and performs PNG integrity checks and corrections. If you wish to learn how PNG optimization works, or to know about other similar tools, see the PNGÂ Tech article A guide to PNG optimization. DOWNLOAD opti
GIMP - The GNU Image Manipulation Program
The Free & Open Source Image Editor This is the official website of the GNU Image Manipulation Program (GIMP). GIMP is a cross-platform image editor available for GNU/Linux, macOS, Windows and more operating systems. It is free software, you can change its source code and distribute your changes. Whether you are a graphic designer, photographer, illustrator, or scientist, GIMP provides you with so
Use Your Mac's Preview App to Crop, Resize, Rotate, and Edit Images
Your Mac's Preview app doesn't just contain PDF-editing features. It's a great little image editor, too. Preview offers basic tools for cropping, resizing, rotating, annotating, and otherwise tweaking images. Just as QuickTime will never replace iMovie in spite of all its useful media editing features, Preview will never replace Photoshop or even iPhoto. But, for some quick and basic image editing
FLIF - Free Lossless Image Format
UPDATE FLIF development has stopped since FLIF is superseded by FUIF and then again by JPEG XL, which is based on a combination of Pik and FUIF. For more information, see Jon's JXL info page or visit the JPEG XL Discord server. FLIF - Free Lossless Image Format FLIF is a novel lossless image format which outperforms PNG, lossless WebP, lossless BPG, lossless JPEG2000, and lossless JPEG XR in terms
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モãƒã‚¤ãƒ«ãƒ•ã‚¡ãƒ¼ã‚¹ãƒˆå®¤ã® @slightair ã§ã™ã€‚ クックパッド㮠iOS/Android アプリã¯ã€å°‘ã—å‰ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã‹ã‚‰WebPå½¢å¼ã®ç”»åƒã‚’サーãƒã‹ã‚‰å–å¾—ã—ã¦è¡¨ç¤ºã™ã‚‹ã‚ˆã†ã«ã—ã¦ã„ã¾ã™ã€‚ ã“ã®è¨˜äº‹ã§ã¯ã€ãªãœç”»åƒå½¢å¼ã‚’WebPã«åˆ‡ã‚Šæ›¿ãˆãŸã®ã‹ã€ã¾ãŸåˆ‡ã‚Šæ›¿ãˆã‚‹ä¸Šã§æ³¨æ„ã—ãŸç‚¹ãªã©ã‚’説明ã—ã¾ã™ã€‚ Cookpad アプリã¨ç”»åƒ クックパッドã®ã‚¢ãƒ—リã¯ãƒ¦ãƒ¼ã‚¶ã•ã‚“ã«æŠ•ç¨¿ã—ã¦ã„ãŸã ã„ãŸãƒ¬ã‚·ãƒ”を表示ã™ã‚‹ã‚¢ãƒ—リケーションã§ã™ã€‚ãã®æ€§è³ªä¸Šã€ãƒ¬ã‚·ãƒ”ç”»åƒã‚„調ç†æ‰‹é †ã€æ¤œç´¢ç”»é¢ã®ã‚µãƒ ãƒã‚¤ãƒ«ãªã©ãŸãã•ã‚“ã®ç”»åƒã‚’サーãƒã‹ã‚‰å–å¾—ã—ã¦è¡¨ç¤ºã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ ç”»åƒã®æ•°ãŒå¢—ãˆãŸã‚Šã‚µã‚¤ã‚ºãŒå¤§ãããªã‚Œã°ãªã‚‹ã»ã©é€šä¿¡é‡ãŒå¢—ãˆã¾ã™ã€‚最近ã¯ã‚¹ãƒžãƒ¼ãƒˆãƒ•ã‚©ãƒ³ã®ç”»é¢ã‚µã‚¤ã‚ºãŒã©ã‚“ã©ã‚“大ãããªã£ã¦ã„ã‚‹ã®ã§ã€ãã‚Œã«åˆã‚ã›ã¦å–å¾—ã™ã‚‹ç”»åƒã‚’大ããã—ã¦ã„ãã¨ã•ã‚‰ã«ãƒ•ã‚¡ã‚¤ãƒ«ã‚µã‚¤ã‚ºãŒå¢—ãˆã€é€šä¿¡é‡ã‚‚増ãˆã¦ã„ã£ã¦ã—ã¾ã„ã¾ã™ã€‚ サーãƒã¨ã‚„ã‚Šã¨ã‚Šã™ã‚‹ãƒ‡ãƒ¼ã‚¿ãŒå¤šããª
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gofu is tofu clone implemented by golang - 鳩舎
go 言語ã‹ã‘るよã†ã«ãªã‚‹ã¨ãƒ¡ã‚¹é³©ã®ã‚¦ã‚±ãŒè‰¯ã„ã¨èžã„ãŸã®ã§é ‘å¼µã£ã¦å‹‰å¼·ã—ã¾ã—ãŸã€‚リリースã¯å¤§å®‰ã‹å‹å¼•ã®æ—¥ã‚’é¸ã¶ã‚¿ã‚¤ãƒ—ã®é³©ã€ãƒãƒ¼ã‚¸ãƒ¼ã§ã™ã€‚ gofu(è·ç¬¦) ã¨ã„ã†ã€å¼Šç¤¾ã® id:mirakui ã•ã‚“ãŒä½œã£ãŸã‚¤ã‚±ã¦ã‚‹ç”»åƒãƒªã‚µã‚¤ã‚ºã‚µãƒ¼ãƒãƒ¼ã€ tofu ã® go 実装ã§ã™(tofu ã«ã¤ã„ã¦ã¯ã“ã®ã¸ã‚“を見るã¨è‰¯ã„ã§ã™)。 ã‚‚ã¡ã‚ん全部機能ãŒè¼‰ã£ã¦ã‚‹ã‚ã‘ã§ã‚‚ãªãã€ã²ã¿ã¤ã®ãƒãƒƒã‚·ãƒ¥å€¤ã‚ãŸã‚Šã¨ã‹ã¯ã©ã†å®Ÿè£…ã•ã‚Œã¦ã‚‹ã®ã‹çŸ¥ã‚‰ã‚“ã—今回必è¦ãªã„ã®ã§ã¤ã‘ã¦ã¾ã›ã‚“。 è·ç¬¦ãŒå‡ºæ¥ã‚‹ã“ã¨ã¯ä»¥ä¸‹ã§å…¨ã¦ã§ã™ã€‚ S3 ã‹ã‚‰ç”»åƒã‚’ã¨ã£ã¦ãã¦è¡¨ç¤ºã™ã‚‹ã“ã¨ãŒå‡ºæ¥ã¾ã™(/image/path.jpg ã«ã‚¢ã‚¯ã‚»ã‚¹ã™ã‚‹ã¨ S3 ã® /image/path.jpg ã‚’å–ã£ã¦ãã¾ã™) å–ã£ã¦ããŸç”»åƒã‹ã‚‰ã¯è‡ªå‹•çš„ã« Exif ãã®ä»–ã®ãƒ¡ã‚¿æƒ…å ±ãŒæ¶ˆãˆã¦ã„ã¾ã™ã€‚ ã“れらã®ãƒ‘ラメータã§ãƒªã‚µã‚¤ã‚ºãªã©ã®å‡¦ç†ã‚’付与ã§ãã¾ã™ã€‚ w : ç”»åƒã®æ¨ªå¹…を変更ã—
pngquant Home Page
pngquant is a command-line* utility to quantize and dither 32-bit RGBA PNGs down to 8-bit (or smaller) RGBA-palette PNGs, usually with a significant reduction in file size. (Other PNG image types, even colormapped images, may also be processed, but they will first be expanded to RGBA, which isn't the most efficient way to do so.) This is the same technique used for many of the images on the Miscel
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Webサイトã§ã„ã‚ã„ã‚ãªã‚µã‚¤ã‚ºã®ç”»åƒã‚’使ã„ãŸã„ã¨ãã€URLã®ãƒ‘ラメータを変ãˆã‚‹ã ã‘ã§ã‚µã‚¤ã‚ºå¤‰æ›ã—ã¦ãれるã¨éžå¸¸ã«ä¾¿åˆ©ã§ã™ã€‚クックパッドã®TOFUã¨ã‹ã‚ã‚Šã¨æœ‰åã§ã™ã。開発効率も上ãŒã‚‹ã—ã€é¢ç™½ãã†ã ã£ãŸã®ã§Nginxã§å®Ÿè£…ã—ã¦ã¿ã¾ã—ãŸã€‚ TOFU : æ–™ç†ã‚’楽ã—ãã™ã‚‹ç”»åƒé…信システムフルサイズã®ç”»åƒ å…ƒã®ç”»åƒã§ã™ http://pic.kksg.net/shirakawago.png 比率固定リサイズã®ç”»åƒ /scale/128x128 を挟むã¨ç¸¦æ¨ªã®æœ€å°‘ãŒ128pxã®ç”»åƒã«ãªã‚Šã¾ã™ã€‚ http://pic.kksg.net/scale/128x128.shirakawago.png サイズ指定切り抜ã c オプションã§åˆ‡ã‚ŠæŠœã。指定サイズã„ã£ã±ã„ã«ã€ã„ã„æ„Ÿã˜ã«åˆ‡ã‚ŠæŠœãã¾ã™ã€‚ http://pic.kksg.net/scale/c.600x150.shirakawago.png グリッãƒ
mod_ktai/YUMEMI Labs [ゆã‚ã¿ãƒ©ãƒœ]
mod_ktai （もã£ã©ãƒ»ã‘ーãŸã„） 「mod_ktaiã€ã¯ã€å¼Šç¤¾ãŒé–‹ç™ºã—ãŸApacheモジュールã§ã™ã€‚ Apache上ã§å‹•ãアプリケーションã«å¯¾ã—ã¦ã€é–‹ç™ºè¨€èªžã‚’å•ã‚ãšæºå¸¯ã‚µã‚¤ãƒˆä½œæˆã®ãŸã‚ã®æ§˜ã€…ãªæ©Ÿèƒ½ã‚’æä¾›ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ æœ€æ–°æƒ…å ± 2008/12/26 mod_ktai_emojiマニュアルã«è¿½è¨˜ & 「よãã‚る質å•ã«ã¤ã„ã¦ã€ãƒšãƒ¼ã‚¸ã‚’æ–°è¦è¿½åŠ 2008/10/29 mod_ktai第二弾公開(mod_ktai_image) & ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã‚¢ãƒƒãƒ— & 対応ＯＳã€é…å¸ƒãƒ‘ãƒƒã‚±ãƒ¼ã‚¸è¿½åŠ 2008/07/16 mod_ktai第一弾公開(mod_ktai_infoã€mod_ktai_emoji) 動作環境 mod_ktaiã¯ç¾åœ¨ä»¥ä¸‹ã®ç’°å¢ƒã§å‹•ä½œã—ã¾ã™ã€‚ OS：CentOS 5ã€RedHat Enterprise 5 ミドルウェア：Apache 2.2以上ã€Boost 1.3
ディザリングã¨ã¯ - IT用語辞典
æ¦‚è¦ ãƒ‡ã‚£ã‚¶ãƒªãƒ³ã‚°ï¼ˆdithering）ã¨ã¯ã€ã‚¢ãƒŠãƒã‚°ä¿¡å·ã®ãƒ‡ã‚¸ã‚¿ãƒ«åŒ–ã‚„ã€ç”»åƒãƒ‡ãƒ¼ã‚¿ã‚„音声データã®ç¸®æ¸›ãªã©ã‚’è¡Œãªã†éš›ã«ã€ãƒ‡ãƒ¼ã‚¿ã«æ„図的ã«ã‚ãšã‹ãªãƒŽã‚¤ã‚ºã‚’åŠ ãˆã€åŠ 工・変æ›ã«ã‚ˆã£ã¦ç”Ÿã˜ã‚‹å¢ƒç•Œéƒ¨åˆ†ã®å¹³æ»‘化や誤差ã®å‘¨æœŸåŒ–ãªã©ã‚’抑ãˆã‚‹æ‰‹æ³•ã€‚å˜ç´”ãªå‡¦ç†æ³•ã¨æ¯”ã¹ã€äººé–“ã®è¦–覚やè´è¦šã«ã¨ã£ã¦ã‚ˆã‚Šè‡ªç„¶ã§ç¾Žã—ãæ„Ÿã˜ã‚‰ã‚Œã‚‹çµæžœã‚’å¾—ã‚‹ã“ã¨ãŒã§ãる。 デジタル画åƒã«ãŠã‘るディザリング画åƒå‡¦ç†ã«ãŠã‘るディザリングã¨ã¯ã€ç”»åƒã®è‰²æ•°ã‚’削減ã—ãŸã‚Šã€å°‘ãªã„色数ã§ç”»åƒã‚’作æˆãƒ»ç·¨é›†ã™ã‚‹éš›ã«ã€ç•°ãªã‚‹è‰²ã®ãƒ”クセル（点）をãƒãƒ©ãƒãƒ©ã«æ··ãœã¦é…ç½®ã™ã‚‹ã“ã¨ã§ä¸é–“色を表ç¾ã™ã‚‹æ‰‹æ³•ã‚’指ã™ã€‚ 例ãˆã°ã€ç™½ã¨é»’ã®2色ã—ã‹åˆ©ç”¨ã§ããªã„å ´åˆã«ã€1ピクセルã”ã¨ã«ç™½ã¨é»’を切り替ãˆã¦å¸‚æ¾æ¨¡æ§˜ã®é ˜åŸŸã‚’作るã¨ã€ãã®éƒ¨åˆ†ã¯äººã®ç›®ã«ã¯ç°è‰²ã«è¦‹ãˆã‚‹ã€‚ã“ã®åŽŸç†ã‚’利用ã—ã¦ã€ä½¿ç”¨å¯èƒ½ãªè‰²ã®ä¸ã‹ã‚‰ã„ãã¤ã‹ã®è‰²ã‚’互ã„ã«è¿‘ã¥ã‘ã¦é…列ã™ã‚‹ã“ã¨ã§ã€æ“¬ä¼¼çš„ã«ä¸é–“色ã®æ»‘らã‹ãªç§»ã‚Šå¤‰ã‚りを作り
ç”»åƒåœ§ç¸®ã‚µã‚¤ãƒˆï¼TinyPNG
Smart WebP, PNG and JPEG Compression for Faster Websites
Perfect Full Page Background Image | CSS-Tricks
Get affordable and hassle-free WordPress hosting plans with Cloudways, now offering 40% off for 4 months, and 40 free migrations. This post was originally published on August 21, 2009 and is now updated as it has been entirely revised. Both original methods are removed and now replaced by four new methods. The goal here is a background image on a website that covers the entire browser window at al
スマートフォン時代ã®Webサイト制作 第4回　画åƒã®æ‰±ã„ã¨æœ€é©åŒ– | デベãƒãƒƒãƒ‘ーセンター
スマートフォンå‘ã‘サイトã§ã¯ã€ãƒ‡ã‚¹ã‚¯ãƒˆãƒƒãƒ—ã«åŠã°ãªã„スペックや接続回線を考慮ã—ã€ã„ã‹ã«ã€Œè»½ã„ã€è¡¨ç¤ºãŒé€Ÿã„ã€ã‚µã‚¤ãƒˆã‚’作るã‹ãŒé‡è¦ã§ã™ã€‚一方ã§ã€æ§˜ã€…ãªç”»é¢è§£åƒåº¦ã®ç«¯æœ«ãŒã‚ã‚Šã€é«˜è§£åƒåº¦ã®ç”»é¢ã‚’æ載ã—ãŸç«¯æœ«å‘ã‘ã«ã¯ã€ãã®ã‚µã‚¤ã‚ºã«å¯¾å¿œã—ãŸå¤§ããªç”»åƒãŒå¿…è¦ã¨ãªã‚‹å ´åˆã‚‚ã‚ã‚Šã¾ã™ã€‚ç”»åƒã®æ‰±ã„ã²ã¨ã¤ã‚’ã¨ã£ã¦ã‚‚ã€ã€Œãƒ‘フォーマンスã€ã¨ã€Œè¦‹æ „ãˆã€ã®åŒæ–¹ã‚’考慮ã—ãªã‘ã‚Œã°ã„ã‘ãªã„難ã—ã•ãŒã‚ã‚Šã¾ã™ã€‚ãã“ã§ä»Šå›žã¯ã€å‰å›žã®ã‚µãƒ³ãƒ—ルサイトを元ã«ã€ç”»åƒé–¢ä¿‚ã®æ‰±ã„や最é©åŒ–ãªã©ã‚’解説ã—ã¾ã™ã€‚ スマートフォンブラウザーã¯PNGã«å¯¾å¿œã—ã¦ã„ã¾ã™ã€‚デスクトップブラウザーã§PNGを使ã†å ´åˆã€Internet Explorer 6ãªã©ã®å¤ã„ブラウザーã«æ°—ã‚’ã¤ã‘ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ãŒã€ã‚¹ãƒžãƒ¼ãƒˆãƒ•ã‚©ãƒ³ãƒ–ラウザーã®å ´åˆã¯æ°—ã«ã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã›ã‚“。 PNGã¯åœ§ç¸®çŽ‡ãŒé«˜ãã€å®¹é‡ã‚’抑ãˆã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ã¾ãŸã€ã‚¢ãƒ«ãƒ•ã‚¡ãƒãƒ£ãƒ³ãƒãƒ«ï¼ˆé€éŽæ©Ÿèƒ½ï¼‰ã‚’æŒã¤ã®ã§ã€åŠé€æ˜Ž
PNGCRUSH
[DOWNLOAD] [CHANGELOG] Pngcrush is an optimizer for PNG (Portable Network Graphics) files. It can be run from a commandline in an MSDOS window, or from a UNIX or LINUX commandline. Its main purpose is to reduce the size of the PNG IDAT datastream by trying various compression levels and PNG filter methods. It also can be used to remove unwanted ancillary chunks, or to add certain chunks including
How To Optimize PNG — Smashing Magazine
This post describes some techniques that may help you optimize your PNG-images. These techniques are derived from laborious hours spent on studying how exactly the PNG encoder saves data. We’ll start with some essentials about the PNG format and will then move to advanced optimization techniques. As a web designer you might be already familiar with the PNG image format which offers a full-featured
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