C＃如何打开HEIC图像

Question

我在ASP.NET中有一个支持JPG / PNG / GIF的图像上传表单，我认为就足够了。直到苹果推出了他们的新HEIC图像格式。如何在C＃中处理呢？

搜索C＃和HEIC在Google中什么都没有显示，因此似乎尚未解决该问题。

.NET Framework是否支持开箱即用的HEIC？可能不是，因为它太新了。是否有任何支持它的第三方库？我想将HEIC转换为JPG进行存储。

谢谢

Answer 1

互联网上有大量关于读取 heic 文件、将其转换为不同的其他文件格式的答案：
Converting .HEIC to JPEG using imagick in C#。

和

https://medium.com/@cloudmersive/how-to-convert-heic-to-png-using-c-in-net-framework-d73ae7d4609e的解决方案。使用将 heic 转换为 png

Cloudmersive.APIClient.NET.DocumentAndDataConvert 

NuGet 包。

//Program.cs
using System;
using System.Diagnostics;
using  Cloudmersive.APIClient.NET.DocumentAndDataConvert.Api;
using Cloudmersive.APIClient.NET.DocumentAndDataConvert.Client;
using Cloudmersive.APIClient.NET.DocumentAndDataConvert.Model;
namespace Example
{
public class ConvertImageImageFormatConvertExample
{
    public static void Main()
    {
        // Configure API key authorization: Apikey
        Configuration.Default.AddApiKey("Apikey", "YOUR_API_KEY");
        // Uncomment below to setup prefix (e.g. Bearer) for API key, if needed
        // 
Configuration.Default.AddApiKeyPrefix("Apikey", "Bearer");
var apiInstance = new ConvertImageApi();
        var format1 = format1_example;  // string | Input file format as a 3+ letter file extension.  You can also provide UNKNOWN for unknown file formats. Supported formats include AAI, ART, ARW, AVS, BPG, BMP, BMP2, BMP3, BRF, CALS, CGM, CIN, CMYK, CMYKA, CR2, CRW, CUR, CUT, DCM, DCR, DCX, DDS, DIB, DJVU, DNG, DOT, DPX, EMF, EPDF, EPI, EPS, EPS2, EPS3, EPSF, EPSI, EPT, EXR, FAX, FIG, FITS, FPX, GIF, GPLT, GRAY, HDR, HEIC, HPGL, HRZ, ICO, ISOBRL, ISBRL6, JBIG, JNG, JP2, JPT, J2C, J2K, JPEG/JPG, JXR, MAT, MONO, MNG, M2V, MRW, MTV, NEF, ORF, OTB, P7, PALM, PAM, PBM, PCD, PCDS, PCL, PCX, PDF, PEF, PES, PFA, PFB, PFM, PGM, PICON, PICT, PIX, PNG, PNG8, PNG00, PNG24, PNG32, PNG48, PNG64, PNM, PPM, PSB, PSD, PTIF, PWB, RAD, RAF, RGB, RGBA, RGF, RLA, RLE, SCT, SFW, SGI, SID, SUN, SVG, TGA, TIFF, TIM, UIL, VIFF, VICAR, VBMP, WDP, WEBP, WPG, X, XBM, XCF, XPM, XWD, X3F, YCbCr, YCbCrA, YUV
        var format2 = format2_example;  // string | Output (convert to this format) file format as a 3+ letter file extension.  Supported formats include AAI, ART, ARW, AVS, BPG, BMP, BMP2, BMP3, BRF, CALS, CGM, CIN, CMYK, CMYKA, CR2, CRW, CUR, CUT, DCM, DCR, DCX, DDS, DIB, DJVU, DNG, DOT, DPX, EMF, EPDF, EPI, EPS, EPS2, EPS3, EPSF, EPSI, EPT, EXR, FAX, FIG, FITS, FPX, GIF, GPLT, GRAY, HDR, HEIC, HPGL, HRZ, ICO, ISOBRL, ISBRL6, JBIG, JNG, JP2, JPT, J2C, J2K, JPEG/JPG, JXR, MAT, MONO, MNG, M2V, MRW, MTV, NEF, ORF, OTB, P7, PALM, PAM, PBM, PCD, PCDS, PCL, PCX, PDF, PEF, PES, PFA, PFB, PFM, PGM, PICON, PICT, PIX, PNG, PNG8, PNG00, PNG24, PNG32, PNG48, PNG64, PNM, PPM, PSB, PSD, PTIF, PWB, RAD, RAF, RGB, RGBA, RGF, RLA, RLE, SCT, SFW, SGI, SID, SUN, SVG, TGA, TIFF, TIM, UIL, VIFF, VICAR, VBMP, WDP, WEBP, WPG, X, XBM, XCF, XPM, XWD, X3F, YCbCr, YCbCrA, YUV
        var inputFile = new System.IO.Stream(); // System.IO.Stream | Input file to perform the operation on.
try
        {
            // Image format conversion
            byte[] result = apiInstance.ConvertImageImageFormatConvert(format1, format2, inputFile);
            Debug.WriteLine(result);
        }
        catch (Exception e)
        {
            Debug.Print("Exception when calling ConvertImageApi.ConvertImageImageFormatConvert: " + e.Message );
        }
    }
}
}

但当你在 asp.net 中时，我想你需要在 html 网页中打开图像，而不是编辑它。
这个问题并不是关于csharp..

https://www.quora.com/Does-Google-Chrome-support-heif-images。正如第一个答案中所说，由于Google Chrome支持h264，所以它应该支持heic..
但这将是一个非常困难的解决方案，这需要做太多的工作，所以我建议只在服务器上转换heic或编写一个自定义脚本，该脚本将允许您读取 heic 文件并以像素为单位查看它。