1, read the picture, according to the line 2 of PGN format, the size of the matrix is 28*28=784, obtained according to the line4. 2, read the picture, according to the line 2 of PGN format, the size of the matrix is 28*28=784, obtained according to the line4. 3. Calculate the average matrix. 4. The average value matrix is SVD: 5. The average matrix carries out the output of the first 20 singular vector after SVD. 6. take each picture of the training set as a line, form a matrix, and then decompose the matrix by PCA. 7. this matrix reduces the dimension of each picture of the test set and gets the image.

Filename	Size	Update
PCA	0	2017-07-03
PCA\.DS_Store	6148	2017-07-03
__MACOSX	0	2017-07-03
__MACOSX\PCA	0	2017-07-03
__MACOSX\PCA\._.DS_Store	120	2017-07-03
PCA\.idea	0	2017-07-03
PCA\.idea\misc.xml	137	2017-07-02
PCA\.idea\modules.xml	258	2017-07-02
PCA\.idea\PCA.iml	97	2017-07-02
PCA\.idea\workspace.xml	22551	2017-07-03
PCA\cmake-build-debug	0	2017-07-02
PCA\cmake-build-debug\cmake_install.cmake	1251	2017-07-02
PCA\cmake-build-debug\CMakeCache.txt	38324	2017-07-02
PCA\cmake-build-debug\CMakeFiles	0	2017-07-03
PCA\cmake-build-debug\CMakeFiles\3.7.1	0	2017-07-02
PCA\cmake-build-debug\CMakeFiles\3.7.1\CMakeCCompiler.cmake	2093	2017-07-02
PCA\cmake-build-debug\CMakeFiles\3.7.1\CMakeCXXCompiler.cmake	4642	2017-07-02
PCA\cmake-build-debug\CMakeFiles\3.7.1\CMakeDetermineCompilerABI_C.bin	4304	2017-07-02
PCA\cmake-build-debug\CMakeFiles\3.7.1\CMakeDetermineCompilerABI_CXX.bin	4288	2017-07-02
PCA\cmake-build-debug\CMakeFiles\3.7.1\CMakeSystem.cmake	362	2017-07-02
PCA\cmake-build-debug\CMakeFiles\3.7.1\CompilerIdC	0	2017-07-02
PCA\cmake-build-debug\CMakeFiles\3.7.1\CompilerIdC\a.out	8616	2017-07-02
PCA\cmake-build-debug\CMakeFiles\3.7.1\CompilerIdC\CMakeCCompilerId.c	16826	2017-07-02
PCA\cmake-build-debug\CMakeFiles\3.7.1\CompilerIdCXX	0	2017-07-02
PCA\cmake-build-debug\CMakeFiles\3.7.1\CompilerIdCXX\a.out	8600	2017-07-02
PCA\cmake-build-debug\CMakeFiles\3.7.1\CompilerIdCXX\CMakeCXXCompilerId.cpp	16397	2017-07-02
PCA\cmake-build-debug\CMakeFiles\clion-environment.txt	76	2017-07-02
PCA\cmake-build-debug\CMakeFiles\clion-log.txt	1027	2017-07-02
PCA\cmake-build-debug\CMakeFiles\cmake.check_cache	85	2017-07-02
PCA\cmake-build-debug\CMakeFiles\CMakeDirectoryInformation.cmake	649	2017-07-02
PCA\cmake-build-debug\CMakeFiles\CMakeOutput.log	28122	2017-07-02
PCA\cmake-build-debug\CMakeFiles\CMakeTmp	0	2017-07-02
PCA\cmake-build-debug\CMakeFiles\feature_tests.bin	8376	2017-07-02
PCA\cmake-build-debug\CMakeFiles\feature_tests.c	728	2017-07-02
PCA\cmake-build-debug\CMakeFiles\feature_tests.cxx	8844	2017-07-02
PCA\cmake-build-debug\CMakeFiles\Makefile.cmake	10168	2017-07-02
PCA\cmake-build-debug\CMakeFiles\Makefile2	3183	2017-07-02
PCA\cmake-build-debug\CMakeFiles\PCA.dir	0	2017-07-02
PCA\cmake-build-debug\CMakeFiles\PCA.dir\build.make	4405	2017-07-02
PCA\cmake-build-debug\CMakeFiles\PCA.dir\cmake_clean.cmake	226	2017-07-02
PCA\cmake-build-debug\CMakeFiles\PCA.dir\CXX.includecache	259	2017-07-02
PCA\cmake-build-debug\CMakeFiles\PCA.dir\depend.internal	168	2017-07-02
PCA\cmake-build-debug\CMakeFiles\PCA.dir\depend.make	143	2017-07-02
PCA\cmake-build-debug\CMakeFiles\PCA.dir\DependInfo.cmake	589	2017-07-02
PCA\cmake-build-debug\CMakeFiles\PCA.dir\flags.make	230	2017-07-02
PCA\cmake-build-debug\CMakeFiles\PCA.dir\link.txt	150	2017-07-02
PCA\cmake-build-debug\CMakeFiles\PCA.dir\main.cpp.o	7576	2017-07-02
PCA\cmake-build-debug\CMakeFiles\PCA.dir\progress.make	43	2017-07-02
PCA\cmake-build-debug\CMakeFiles\progress.marks	2	2017-07-02
PCA\cmake-build-debug\CMakeFiles\TargetDirectories.txt	215	2017-07-02
PCA\cmake-build-debug\Makefile	4906	2017-07-02
PCA\cmake-build-debug\PCA	13648	2017-07-02
PCA\cmake-build-debug\PCA.cbp	5299	2017-07-02
PCA\cmake-build-debug\test0	0	2017-07-02
PCA\cmake-build-debug\test0\00000.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00001.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00002.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00003.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00004.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00005.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00006.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00007.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00008.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00009.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00010.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00011.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00012.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00013.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00014.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00015.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00016.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00017.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00018.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00019.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00020.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00021.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00022.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00023.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00024.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00025.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00026.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00027.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00028.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00029.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00030.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00031.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00032.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00033.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00034.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00035.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00036.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00037.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00038.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00039.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00040.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00041.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00042.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00043.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00044.pgm	797	2009-02-06
PCA\cmake-build-debug\test0\00045.pgm	797	2009-02-06

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