1 #include "ImageRec.h" 2 using namespace std; 3 4 void ImageRec::getImageFile() 5 { 6 fstream img("1.jpg", fstream::in | ios::binary); 7 fstream imgout("2.jpg", fstream::out | ios::binary); 8 img.seekg(0, img.end); 9 long length = img.tellg(); 10 img.seekg(0, img.beg); 11 if (length>0) 12 { 13 char* buffer = new char[length]; 14 img.read(buffer, length); 15 16 17 18 imgout.write(buffer,length); 19 delete[] buffer; 20 } 21 img.close(); 22 imgout.close(); 23 24 return ; 25 }
C++ 文件读写。怎么得到图片的像素？
https://github.com/irwir/CxImage
https://github.com/wavescholar/CxImageVS2010 这个可以用
使用方法https://www.cnblogs.com/lidabo/p/6923426.html
#include <iostream> #include <string> #include <fstream> #include "../CxImage/xfile.h" #include "../CxImage/ximajpg.h" #include "../CxImage/ximabmp.h" using namespace std; #pragma comment(lib,"CxImage.lib") int main() { fstream img("1.jpg", fstream::in | ios::binary); CxImage image; // bmp -> jpg image.Load("1.jpg", CXIMAGE_FORMAT_JPG); if (image.IsValid()) { /*if (!image.IsGrayScale()) image.IncreaseBpp(24); image.SetJpegQuality(80); image.Save("1.bmp", CXIMAGE_FORMAT_BMP);*/ CxImage imageG; image.SplitRGB(nullptr, &imageG, nullptr); imageG.Save("1g.jpg", CXIMAGE_FORMAT_JPG); //imageG.arr } // png -> tif //image.Load("image.png", CXIMAGE_FORMAT_PNG); //if (image.IsValid()) { // image.Save("image.tif", CXIMAGE_FORMAT_TIF); //} //fstream imgout("2.jpg", fstream::out | ios::binary); img.seekg(0, img.end); long length = img.tellg(); img.seekg(0, img.beg); if (length > 0) { char* buffer = new char[length]; //char* buffer = new char[length]; img.read(buffer, length); CxFile* fimg; memset(&fimg, 0, length); //fimg() fimg->Write(buffer, length,1); CxImageJPG jpg; bool s= jpg.Decode(fimg); //imgout.write(buffer, length); delete[] buffer; } img.close(); //imgout.close(); //jpg.get // ximajpg std::cout << "Hello World! "; }
配置很重要
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<SuppressStartupBanner>true</SuppressStartupBanner> <WarningLevel>Level3</WarningLevel> <AdditionalIncludeDirectories>..jpeg;..png;..zlib;..mng;.. iff;..j2k;..jasperinclude;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories> <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;JAS_WIN_MSVC_BUILD;_CRT_SECURE_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions> <AssemblerListingLocation>.Release</AssemblerListingLocation> <PrecompiledHeaderOutputFile>.Releasecximage.pch</PrecompiledHeaderOutputFile> <ObjectFileName>.Release</ObjectFileName> <ProgramDataBaseFileName>.Release</ProgramDataBaseFileName> </ClCompile> <Link> <SubSystem>Console</SubSystem> <EnableCOMDATFolding>true</EnableCOMDATFolding> <OptimizeReferences>true</OptimizeReferences> <GenerateDebugInformation>true</GenerateDebugInformation> </Link> </ItemDefinitionGroup> <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'"> <ClCompile> <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary> 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Include="..x64DebugJpeg.lib" /> <Library Include="..x64Debuglibdcr.lib" /> <Library Include="..x64Debugmng.lib" /> <Library Include="..x64Debugpng.lib" /> <Library Include="..x64DebugTiff.lib" /> <Library Include="..x64Debugzlib.lib" /> </ItemGroup> <ItemGroup> <ClInclude Include="..CxImagexfile.h" /> <ClInclude Include="..CxImageximabmp.h" /> <ClInclude Include="..CxImageximacfg.h" /> <ClInclude Include="..CxImageximadef.h" /> <ClInclude Include="..CxImageximage.h" /> <ClInclude Include="..CxImageximagif.h" /> <ClInclude Include="..CxImageximaico.h" /> <ClInclude Include="..CxImageximaiter.h" /> <ClInclude Include="..CxImageximajas.h" /> <ClInclude Include="..CxImageximajbg.h" /> <ClInclude Include="..CxImageximajpg.h" /> <ClInclude Include="..CxImageximamng.h" /> <ClInclude Include="..CxImageximapcx.h" /> <ClInclude Include="..CxImageximapng.h" /> <ClInclude Include="..CxImageximaraw.h" /> <ClInclude Include="..CxImageximaska.h" /> <ClInclude Include="..CxImageximatga.h" /> <ClInclude Include="..CxImageximath.h" /> <ClInclude Include="..CxImageximatif.h" /> <ClInclude Include="..CxImageximawbmp.h" /> <ClInclude Include="..CxImageximawmf.h" /> <ClInclude Include="..CxImagexiofile.h" /> <ClInclude Include="..CxImagexmemfile.h" /> </ItemGroup> <Import Project="$(VCTargetsPath)Microsoft.Cpp.targets" /> <ImportGroup Label="ExtensionTargets"> </ImportGroup> </Project>
这个是完整的配置。（这块搞了大半天） 执行完效果 如下图
