iam using Imagemagick & potrace in c# to convert png to pnm and then to svg but unfortunately the SVG File comes with out colour! how i can solve the colour problem? should i use another converter? suggestions please?
i have tried many packages in visual studio with C# but either don't work or the output comes out with the copyright sentence and that doesn't make my svg file nice! i want my output with out the copyright sentence please!
You can use Aspose.Imaging for .NET API. Please open the NuGet package manager, search for "Aspose.Imaging " and install it. Tip: I am using .net 5.0 The modified code is as follows:
using Aspose.Imaging;
using Aspose.Imaging.FileFormats.Png;
using Aspose.Imaging.ImageOptions;
using System.Collections.Generic;
using System.IO;
using System.Linq;
public class Picture
{
public static void Main()
{
string templatesFolder = @"C:\Users\Administrator\Downloads\"; //the document you want to store
string dataDir = templatesFolder;
ProcessConvertion();
void ProcessConvertion()
{
//Get list of supported formats in
//Aspose.Imaging for loading and saving images
var formats = GetAvailableImageFormats();
var importFormats = formats.Import;
var exportFormats = formats.Export;
//Process each raster and vector format that can be loaded
foreach (var format in importFormats)
{
string formatExt = format.Key;
var inputFile = @"C:\Users\Administrator\Downloads\1.png"; //your PNG of picture path
//Process each raster and vector format
//to which we can save imported image
foreach (var exportFormat in exportFormats)
{
var outputFile = Path.Combine(templatesFolder, $"convert-{formatExt}-to-{exportFormat.Key}.{exportFormat.Key}");
System.Console.WriteLine("Processing conversion:" + outputFile);
//More about load method can be found at
//https://apireference.aspose.com/imaging/net/aspose.imaging.image/load/methods/2
//Load imported image
using (var image = Image.Load(inputFile))
{
//Obtain default saving options defined for each image
ImageOptionsBase exportOptions = exportFormat.Value.Clone();
//If loaded image is vector, need to specify vector rasterization options
//for export to another vector
if (image is VectorImage)
{
VectorRasterizationOptions rasterizationOptions = format.Value;
rasterizationOptions.PageWidth = image.Width;
rasterizationOptions.PageHeight = image.Height;
exportOptions.VectorRasterizationOptions = rasterizationOptions;
}
if (Path.GetExtension(outputFile).Equals(".svg"))
{
image.Save(outputFile, exportOptions);
}
}
//File.Delete(outputFile);
}
break;
//System.GC.Collect();
}
}
(Dictionary<string, VectorRasterizationOptions> Import, Dictionary<string, ImageOptionsBase> Export) GetAvailableImageFormats()
{
///Raster and vector formats to that we can export images
//Raster image formats that support both - save and load and their default save options
Dictionary<string, ImageOptionsBase> rasterFormatsThatSupportExportAndImport = new Dictionary<string, ImageOptionsBase>()
{
{ "bmp", new BmpOptions()},
{ "gif", new GifOptions()},
{ "dicom", new DicomOptions()},
{ "jpg", new JpegOptions()},
{ "jpeg", new JpegOptions()},
{ "jpeg2000", new Jpeg2000Options() },
{ "j2k", new Jpeg2000Options { Codec = Aspose.Imaging.FileFormats.Jpeg2000.Jpeg2000Codec.J2K } },
{ "jp2", new Jpeg2000Options { Codec = Aspose.Imaging.FileFormats.Jpeg2000.Jpeg2000Codec.Jp2 }},
{ "png",new PngOptions(){ ColorType = PngColorType.TruecolorWithAlpha} },
{ "apng", new ApngOptions()},
{ "tiff", new Aspose.Imaging.ImageOptions.TiffOptions(Aspose.Imaging.FileFormats.Tiff.Enums.TiffExpectedFormat.Default)},
{ "tif", new Aspose.Imaging.ImageOptions.TiffOptions(Aspose.Imaging.FileFormats.Tiff.Enums.TiffExpectedFormat.Default)},
{ "tga", new TgaOptions()},
{ "webp", new WebPOptions()},
{ "ico", new IcoOptions()}
};
//Vector image formats that support both - save and load, their default save options
//and their rasterization options when exporting to another vector image
Dictionary<string, (ImageOptionsBase, VectorRasterizationOptions)> vectorFormatsThatSupportExportAndImport
= new Dictionary<string, (ImageOptionsBase, VectorRasterizationOptions)>()
{
{ "emf", (new EmfOptions(),new EmfRasterizationOptions()) },
{ "svg", (new SvgOptions(), new SvgRasterizationOptions())},
{ "wmf", (new WmfOptions(), new WmfRasterizationOptions())},
{ "emz", (new Aspose.Imaging.ImageOptions.EmfOptions(){ Compress = true }, new EmfRasterizationOptions())},
{ "wmz", (new Aspose.Imaging.ImageOptions.WmfOptions(){ Compress = true }, new WmfRasterizationOptions())},
{ "svgz", (new Aspose.Imaging.ImageOptions.SvgOptions(){ Compress = true }, new SvgRasterizationOptions())},
};
///Raster and vector formats from which we can load images
//Formats that can be only saved (supported only save to this formats)
Dictionary<string, ImageOptionsBase> formatsOnlyForExport = new Dictionary<string, ImageOptionsBase>()
{
{ "psd", new PsdOptions()},
{ "dxf", new DxfOptions(){ TextAsLines = true,ConvertTextBeziers = true} },
{ "pdf", new PdfOptions()},
{ "html", new Html5CanvasOptions()},
};
//Raster formats that can be only loaded
List<string> formatsOnlyForImport = new List<string>()
{
"djvu", "dng", "dib"
};
//Vector formats only for loading and their rasterization options when exporting to another vector format
Dictionary<string, VectorRasterizationOptions> vectorFormatsOnlyForImport = new Dictionary<string, VectorRasterizationOptions>()
{
{"eps", new EpsRasterizationOptions()},
{"cdr", new CdrRasterizationOptions() },
{"cmx", new CmxRasterizationOptions() },
{"otg", new OtgRasterizationOptions() },
{"odg", new OdgRasterizationOptions() }
};
//Get total set of formats to what we can export images
Dictionary<string, ImageOptionsBase> exportFormats = vectorFormatsThatSupportExportAndImport
.ToDictionary(s => s.Key, s => s.Value.Item1)
.Union(formatsOnlyForExport)
.Concat(rasterFormatsThatSupportExportAndImport)
.ToDictionary(s => s.Key, s => s.Value);
//Get total set of formats that can be loaded
Dictionary<string, VectorRasterizationOptions> importFormats = vectorFormatsOnlyForImport
.Union(formatsOnlyForImport.ToDictionary(s => s, s => new VectorRasterizationOptions()))
.Union(vectorFormatsThatSupportExportAndImport.ToDictionary(s => s.Key, s => s.Value.Item2))
.ToDictionary(s => s.Key, s => s.Value);
return (Import: importFormats, Export: exportFormats);
}
}
}
You can also refer to the official code: https://products.aspose.com/imaging/net/conversion/png-to-svg/
