API de C# .NET para crear, editar y convertir imágenes

Instalar Aspose.Imaging para .NET mediante NuGet

NuGet\Install-Package Aspose.Imaging -Version 22.12.0 

using Aspose.Imaging;
using Aspose.Imaging.ImageOptions;
using Aspose.Imaging.Sources;
using System.IO;

string templatesFolder = @"c:\Users\USER\Downloads\templates\";
string dataDir = templatesFolder;

// Creates an instance of BmpOptions and set its various properties
BmpOptions ImageOptions = new BmpOptions();
ImageOptions.BitsPerPixel = 24;

// Create an instance of System.IO.Stream
Stream stream = new FileStream(dataDir + "result1.bmp", FileMode.Create);

// Define the source property for the instance of BmpOptions Second boolean parameter determines if the Stream is disposed once get out of scope
ImageOptions.Source = new StreamSource(stream, true);

// Creates an instance of Image and call Create method by passing the BmpOptions object
using (Image image = Image.Create(ImageOptions, 500, 500))
{
    // Do some image processing
    image.Save(dataDir + "result2.bmp");
}

File.Delete(dataDir + "result1.bmp");
File.Delete(dataDir + "result2.bmp");

Convertir imagen a escala de grises mediante la API de C#

using Aspose.Imaging;
using System.IO;

string templatesFolder = @"c:\Users\USER\Downloads\templates\";
string dataDir = templatesFolder;

// Load an image in an instance of Image
using (Image image = Image.Load(dataDir + "template.jpg"))
{
    // Cast the image to RasterCachedImage and Check if image is cached                
    RasterCachedImage rasterCachedImage = (RasterCachedImage)image;
    if (!rasterCachedImage.IsCached)
    {
        // Cache image if not already cached
        rasterCachedImage.CacheData();
    }

    // Binarize image with predefined fixed threshold and Save the resultant image                
    rasterCachedImage.Grayscale();
    rasterCachedImage.Save(dataDir + "result.jpg");
}


File.Delete(dataDir + "result.jpg");

Aplicar filtro en imágenes PNG mediante la API de C#

using Aspose.Imaging;
using Aspose.Imaging.FileFormats.Png;
using Aspose.Imaging.ImageOptions;
using System.IO;

string templatesFolder = @"c:\Users\USER\Downloads\templates\";
string dataDir = templatesFolder;

using (PngImage png = (PngImage)Image.Load(dataDir + "template.png"))
{
    // Create an instance of PngOptions, Set the PNG filter method and Save changes to the disc
    PngOptions options = new PngOptions();
    options.FilterType = PngFilterType.Paeth;
    png.Save(dataDir + "result.png", options);
}

File.Delete(dataDir + "result.png");

using Aspose.Imaging;
using Aspose.Imaging.Brushes;
using Aspose.Imaging.ImageOptions;
using Aspose.Imaging.Sources;
using System.IO;

string templatesFolder = @"c:\Users\USER\Downloads\templates\";
string dataDir = templatesFolder;

// Creates an instance of FileStream
using (FileStream stream = new FileStream(dataDir + "result.bmp", FileMode.Create))
{
    // Create an instance of BmpOptions and set its various properties
    BmpOptions saveOptions = new BmpOptions();
    saveOptions.BitsPerPixel = 32;

    // Set the Source for BmpOptions and Create an instance of Image
    saveOptions.Source = new StreamSource(stream);
    using (Image image = Image.Create(saveOptions, 100, 100))
    {
        // Create and initialize an instance of Graphics class,  Clear Graphics surface, Draw a rectangle shapes and  save all changes.
        Graphics graphic = new Graphics(image);
        graphic.Clear(Color.Yellow);
        graphic.DrawRectangle(new Pen(Color.Red), new Rectangle(30, 10, 40, 80));
        graphic.DrawRectangle(new Pen(new SolidBrush(Color.Blue)), new Rectangle(10, 30, 80, 40));
        image.Save();
    }
}

File.Delete(dataDir + "result.bmp");