OpenCV/Patch to support WebP format on OpenCV 2.4.2 の変更点

http://www.atinfinity.info/wiki/index.php?OpenCV/Patch%20to%20support%20WebP%20format%20on%20OpenCV%202.4.2

[ トップ ]   [ 編集 | 差分 | バックアップ | 添付 | リロード ]   [ 新規 | 一覧 | 単語検索 | 最終更新 | ヘルプ | ログイン ]

• 追加された行はこの色です。
• 削除された行はこの色です。
• OpenCV/Patch to support WebP format on OpenCV 2.4.2 へ行く。
• OpenCV/Patch to support WebP format on OpenCV 2.4.2 の差分を削除

---

*OpenCV/Patch to support WebP format on OpenCV 2.4.2 [#za343d9a]
#multilang(ja){{
**概要
OpenCV 2.4.2でWebP形式のフォーマットを扱えるようにするパッチです．&br;
※OpenCV 2.4.2を対象としたパッチです．
**ダウンロード
|Version|Filename|Size|Date|Type|Download|
|BGCOLOR(white):1.0|BGCOLOR(white):opencv2.4.2_webp_enable_patch_20120809.zip|BGCOLOR(white):31.6 KB|BGCOLOR(white):20120809|BGCOLOR(white):zip|BGCOLOR(white):[[http://www.atinfinity.info/img/download.gif:http://www.atinfinity.info/opencv/extension/opencv2.4.2_webp_enable_patch_20120809.zip]]|

**変更履歴
|Version|Date|変更内容|
|BGCOLOR(white):1.0|BGCOLOR(white):20120809|BGCOLOR(white):新規作成|

**使い方
***WebPライブラリのビルド
+[[こちら:https://code.google.com/p/webp/downloads/detail?name=libwebp-0.2.0.tar.gz]]からWebPのソースをダウンロードする．※今回はlibwebp-0.2.0.tar.gzを用いた．
+libwebp-0.2.0.tar.gzを展開する．
+Visual Studio コマンド プロンプトを起動する．
+コマンド プロンプトでlibwebp-0.2.0のディレクトリに移動する．
+下記のコマンドを実行する（release用ライブラリが生成される）．
 nmake /f Makefile.vc CFG=release-static RTLIBCFG=static OBJDIR=output
 
　※Linux，Macの場合は以下のコマンドを実行する．
 make -f makefile.unix

***OpenCV WebPパッチの適用
+上記リンクからopencv2.4.2_webp_enable_patch_20120809.zipをダウンロードして展開します．
+展開したディレクトリをOpenCVディレクトリに上書きします．
　※Linux，Macに適用する場合には，パッチ（下記ファイル）の改行コードをあらかじめnkfコマンド等でLFに変換して下さい．


-opencv2.4.2_webp_enable_patch_20111204\CMakeLists.txt
-opencv2.4.2_webp_enable_patch_20111204\cmake\OpenCVFindLibsGrfmt.cmake
-opencv2.4.2_webp_enable_patch_20111204\cmake\OpenCVFindWebP.cmake
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\CMakeLists.txt
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\include\opencv2\highgui\highgui.hpp
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\include\opencv2\highgui\highgui_c.h
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\src\grfmt_webp.cpp
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\src\grfmt_webp.hpp
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\src\grfmts.hpp
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\src\loadsave.cpp
-opencv2.4.2_webp_enable_patch_20120809\CMakeLists.txt
-opencv2.4.2_webp_enable_patch_20120809\cmake\OpenCVFindLibsGrfmt.cmake
-opencv2.4.2_webp_enable_patch_20120809\cmake\OpenCVFindWebP.cmake
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\CMakeLists.txt
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\include\opencv2\highgui\highgui.hpp
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\include\opencv2\highgui\highgui_c.h
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\src\grfmt_webp.cpp
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\src\grfmt_webp.hpp
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\src\grfmts.hpp
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\src\loadsave.cpp

***OpenCVのビルド [#f02dfa0a]
OpenCVをCMakeを用いてビルドする．

+WITH_WEBPにチェックを入れて，「Configure」ボタンを押す．
&br;&ref(http://atinfinity.info/img/opencv/cmake_with_webp_0001.png);&br;&br;&br;
+WEBP_INCLUDE_DIRSにWebPのソースがあるディレクトリを指定して，「Generate」ボタンを押す．
&br;&ref(http://atinfinity.info/img/opencv/cmake_with_webp_0002.png);&br;&br;&br;


**おまけ(1)
下記のような設定をすることでデコード時のquality(0～100)を指定できる．&br;
※以下の例では最大品質の100を指定．
***C API
 int param[2];
 param[0] = CV_IMWRITE_WEBP_QUALITY;
 param[1] = 100;
 cvSaveImage("img.webp", img, &param[0]);

***C++ API
 vector<int> param = vector<int>(2);
 param[0] = CV_IMWRITE_WEBP_QUALITY;
 param[1] = 100;
 imwrite("img.webp", img, param);

**おまけ(2)
下記のような設定をすることでlossless圧縮を指定できる．

***C API
 int param[2];
 param[0] = CV_IMWRITE_WEBP_LOSSLESS;
 param[1] = 1;
 cvSaveImage("img.webp", img, &param[0]);

***C++ API
 vector<int> param = vector<int>(2);
 param[0] = CV_IMWRITE_WEBP_LOSSLESS;
 param[1] = 1;
 imwrite("img.webp", img, param);

**制限事項
-Windows 32bit/Mac 64bitのみで動作検証．
-保存対象画像となるdepthは8Uのみ．
**注意点
-CV_IMWRITE_WEBP_QUALITYによる指定が無い場合，デフォルトで95が指定される．

}}

#multilang(en){{
**Abstract
This page describes the method to use WebP format on OpenCV 2.4.2.&br;
**Download
|Version|Filename|Size|Date|Type|Download|
|BGCOLOR(white):1.0|BGCOLOR(white):opencv2.4.2_webp_enable_patch_20120809.zip|BGCOLOR(white):31.6 KB|BGCOLOR(white):20120809|BGCOLOR(white):zip|BGCOLOR(white):[[http://www.atinfinity.info/img/download.gif:http://www.atinfinity.info/opencv/extension/opencv2.4.2_webp_enable_patch_20120809.zip]]|

**ChangeLog
|Version|Date|Changes|
|BGCOLOR(white):1.0|BGCOLOR(white):20120809|BGCOLOR(white):First Release|

**Usage
***Build WebP library
+Please download ''WebP source code'' from [[Official  page:https://code.google.com/p/webp/downloads/detail?name=libwebp-0.2.0.tar.gz]]. I used libwebp-0.2.0.tar.gz for testing.
+Please extract libwebp-0.2.0.tar.gz.
+Please start Visual Studio command prompt.
+Please move to ''libwebp-0.2.0'' directory.
+Please run the following command to make WebP library(release build).
 nmake /f Makefile.vc CFG=release-static RTLIBCFG=static OBJDIR=output
　If you use on Linux or Max, please run the following command to make WebP library
 make -f makefile.unix

***Applying WebP patch
+Please download opencv2.4.2_webp_enable_patch_20120809.zip. And,extract this file.
+Please overwrite to OpenCV's directory.

&br;If you want to apply this patch to OpenCV-2.4.2(Linux or Mac), please convert newline character of these file to LF from CRLF.
-opencv2.4.2_webp_enable_patch_20111204\CMakeLists.txt
-opencv2.4.2_webp_enable_patch_20111204\cmake\OpenCVFindLibsGrfmt.cmake
-opencv2.4.2_webp_enable_patch_20111204\cmake\OpenCVFindWebP.cmake
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\CMakeLists.txt
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\include\opencv2\highgui\highgui.hpp
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\include\opencv2\highgui\highgui_c.h
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\src\grfmt_webp.cpp
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\src\grfmt_webp.hpp
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\src\grfmts.hpp
-opencv2.4.2_webp_enable_patch_20111204\modules\highgui\src\loadsave.cpp
-opencv2.4.2_webp_enable_patch_20120809\CMakeLists.txt
-opencv2.4.2_webp_enable_patch_20120809\cmake\OpenCVFindLibsGrfmt.cmake
-opencv2.4.2_webp_enable_patch_20120809\cmake\OpenCVFindWebP.cmake
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\CMakeLists.txt
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\include\opencv2\highgui\highgui.hpp
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\include\opencv2\highgui\highgui_c.h
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\src\grfmt_webp.cpp
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\src\grfmt_webp.hpp
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\src\grfmts.hpp
-opencv2.4.2_webp_enable_patch_20120809\modules\highgui\src\loadsave.cpp


***Build OpenCV
Please build OpenCV using CMake.

+Please check ''WITH_WEBP'' and push ''Configure'' button.
&br;&ref(http://atinfinity.info/img/opencv/cmake_with_webp_0001.png);&br;&br;&br;
+Please specify WebP source's directory to ''WEBP_INCLUDE_DIRS'' and push ''Generate'' button.
&br;&ref(http://atinfinity.info/img/opencv/cmake_with_webp_0002.png);&br;&br;&br;

**Tips(1)
You can specify the compression quality(min:0, max:100) by the following settings.
***C API
 int param[2];
 param[0] = CV_IMWRITE_WEBP_QUALITY;
 param[1] = 100;
 cvSaveImage("img.webp", img, &param[0]);

***C++ API
 vector<int> param = vector<int>(2);
 param[0] = CV_IMWRITE_WEBP_QUALITY;
 param[1] = 100;
 imwrite("img.webp", img, param);

**Tips(2)
You can specify the lossless compression by the following settings.

***C API
 int param[2];
 param[0] = CV_IMWRITE_WEBP_LOSSLESS;
 param[1] = 1;
 cvSaveImage("img.webp", img, &param[0]);

***C++ API
 vector<int> param = vector<int>(2);
 param[0] = CV_IMWRITE_WEBP_LOSSLESS;
 param[1] = 1;
 imwrite("img.webp", img, param);

**Limitation
-I have only tested this environment.
--Windows 32bit and Mac 64bit
-Save image depth supports 8U only.

**Notes
-If you does not specify the quality by CV_IMWRITE_WEBP_QUALITY, 95 is specified by default.
}}

       

Site admin: dandelion

PukiWiki 1.5.1 © 2001-2016 PukiWiki Development Team. Powered by PHP 7.1.33. HTML convert time: 0.001 sec.