Iphone的HEIC圖片文件格式轉換及相關開發工具

1、Windows 10安裝插件查看heic圖片

Windows10上默認無法打開Apple的HEVC&HEIC格式文件，需要安裝相應的擴展,在 Microsoft Store里查找會發現“HEVC視頻擴展”是一個付費應用！（在國外的Microsoft Store里此擴展是免費的。實際上在品牌機預裝Win10中會自帶一個“來自設備制造商的HEVC視頻擴展”，功能和付費的是一樣的。但是你無法在Microsoft Store內直接搜索到這個擴展。

解決辦法：
瀏覽器中直接打開如下鏈接：
https://www.microsoft.com/en-us/p/hevc-video-extensions-from-device-manufacturer/9n4wgh0z6vhq
點擊“獲取”就會自動打開Microsoft Store來安裝此擴展了。

2、批量轉換工具

如果需要批量的轉換工具，可以下載下面的免費工具

https://github.com/liuziangexit/HEIF-Utility

 

里面附帶的dll可以供開發編程使用

opencv_ffmpeg330_64.dll

opencv_world330.dll

HUD.dll

 

3、程序處理

可以下載下面的Dll，這個dll封裝了opencv相關api接口，提供了轉換的接口，接口可以通過C、C#、JNI等來調用

HEIF Utility Native DLL:  https://github.com/liuziangexit/HEIF-Utility-Native-DLL

 

C語言調用工具

編譯版本下載地址： https://files.cnblogs.com/files/midea0978/HeicConvertTool.rar

#include <iostream>
#include <cstring>
#include <fstream>
#include <sstream>
#include <windows.h>

using namespace std;
typedef  void (__stdcall *heif2jpg)(const char heif_bin[], int input_buffer_size, const int jpg_quality,
                                    char output_buffer[], int output_buffer_size, const char* input_temp_filename,
                                    int* copysize, bool include_exif, bool color_profile, const char icc_bin[], int icc_size);
//讀取文件內容
ostringstream readBinFile(char* filename,int &size)
{
    fstream fs;
    fs.open(filename, ios::in|ios::binary);
    ostringstream oss;
    oss << fs.rdbuf();
    size=oss.str().length();
    fs.close();
    return oss;
}

int main(int argc, char *argv[])
{
    cout <<"Heic Convert Tool V1.0 <By midea0978>"<<endl;
    cout <<"====================================\n"<<endl;
    int quality=80;
    if(argc<2)
    {
        cout <<"heic.exe <heic文件名> [jpg質量1-100,默認80]\n\n"<<endl;
        return -1;
    }
    if(argc>=3) quality=atoi(argv[2]);
    HMODULE hModule;
    hModule = LoadLibraryA("HUD.dll");
    if ( NULL == hModule)
    {
        DWORD error_id=GetLastError();
        cout<<"加載hud.dll失敗:"<<error_id<<endl;
        return -1;
    }
    heif2jpg func = NULL;
    func = (heif2jpg)GetProcAddress(hModule, "heif2jpg");
    char drive[_MAX_DRIVE];
    char dir[_MAX_DIR];
    char fname[_MAX_FNAME];
    char ext[_MAX_EXT];
    _splitpath(argv[1], drive, dir, fname, ext);
    string ofilename;
    ofilename+=drive;
    ofilename+=dir;
    ofilename+=fname;
    ofilename+=".jpg";
    printf("輸出JPG文件 %s\n",ofilename.c_str());
    int imgsize=0;
    ostringstream heicdata=readBinFile(argv[1],imgsize);
    int outsize=10*imgsize;
    char* outbuffer;
    int copysize[]= {0};
    outbuffer = (char*)malloc(outsize);
    memset(outbuffer, 0, outsize);
    char temppath[MAX_PATH];
    GetTempPath(MAX_PATH,temppath);
    string tempfile;
    tempfile+=temppath;
    tempfile+="\\temp.dat";
    func(heicdata.str().c_str(),imgsize,quality,outbuffer,outsize,tempfile.c_str(),copysize,true,false,NULL,0);
    ofstream outfile(ofilename,ios::binary);
    outfile.write(outbuffer,copysize[0]);
    outfile.close();
    remove(tempfile.c_str());
    FreeLibrary(hModule);
    return 0;
}

 

對應C#的調用方式，代碼來自於下面的URL

[DllImport("HUD.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.Cdecl)]
private unsafe extern static void heif2jpg(byte* heif_bin, int input_buffer_size, int jpg_quality, byte* ouput_buffer, int output_buffer_size, byte* temp_filename, int* copysize, bool include_exif, bool color_profile, byte* icc_bin, int icc_size);

[DllImport("HUD.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.Cdecl)]
private unsafe extern static void getexif(byte* heif_bin, int input_buffer_size, byte* ouput_buffer, int output_buffer_size, int* copysize);

public static unsafe byte[] invoke_heif2jpg(byte[] heif_bin, int jpg_quality, string temp_filename, ref int copysize, bool include_exif, bool color_profile)
{
    if (color_profile == true && DisplayP3Profile.Length == 1)
        throw new Exception();//沒有ICC卻指定要寫入ICC

    var output_buffer = new byte[heif_bin.Length * 10];
    byte[] temp_filename_byte_array = System.Text.Encoding.Default.GetBytes(temp_filename);
    int[] copysize_array = new int[1] { 0 };
    fixed (byte* input = &heif_bin[0], output = &output_buffer[0], temp_filename_byte = &temp_filename_byte_array[0], icc_ptr = &DisplayP3Profile[0])
    fixed (int* copysize_p = &copysize_array[0])
    {
        heif2jpg(input, heif_bin.Length, jpg_quality, output, output_buffer.Length, temp_filename_byte, copysize_p, include_exif, color_profile, icc_ptr, DisplayP3Profile.Length);
    }
    copysize = copysize_array[0];
    return output_buffer;
}

public static unsafe string invoke_getexif(byte[] heif_bin, ref int copysize)
{
    var output_buffer = new byte[65535];
    int[] copysize_array = new int[1] { 0 };
    fixed (byte* input = &heif_bin[0], output = &output_buffer[0])
    fixed (int* copysize_p = &copysize_array[0])
    {
        getexif(input, heif_bin.Length, output, output_buffer.Length, copysize_p);
    }
    copysize = copysize_array[0];
    return Encoding.Default.GetString(output_buffer, 0, copysize);
}

 

　　

詳細代碼參考：https://github.com/liuziangexit/HEIF-Utility/blob/master/HEIF%20Utility/invoke_dll.cs　　

 

其他的開源庫：

https://github.com/libvips/libvips

ibvips是一個圖像處理庫。與類似的庫相比，libvips運行迅速且幾乎不占用內存。libvips是根據LGPL 2.1+許可的。

它具有約300種運算， 涵蓋算術，直方圖，卷積，形態運算，頻率濾波，顏色，重采樣，統計等。它支持多種數字類型，從8位int到128位復數。圖像可以具有任意數量的波段。它支持各種圖像格式，包括JPEG，TIFF，PNG，WebP，HEIC，FITS，Matlab，OpenEXR，PDF，SVG，HDR，PPM / PGM / PFM，CSV，GIF，分析，NIfTI，DeepZoom和OpenSlide 。它還可以通過ImageMagick或GraphicsMagick加載圖像，使其與DICOM等格式一起使用。