Image.Resize

Resize(int, int, ResizeType)

Resizes the image.

public virtual void Resize(int newWidth, int newHeight, ResizeType resizeType)
ParameterTypeDescription
newWidthInt32The new width.
newHeightInt32The new height.
resizeTypeResizeTypeThe resize type.

Examples

Resize EPS image and export it to PNG format.

[C#]

// Load EPS image
using (var image = Image.Load("AstrixObelix.eps"))
{
    // Resize the image using the Mitchell cubic interpolation method
    image.Resize(400, 400, ResizeType.Mitchell);

    // Export image to PNG format
    image.Save("ExportResult.png", new PngOptions());
}

Resize image using specific Resize Type.

[C#]

using (var image = Image.Load("Photo.jpg"))
{
    image.Resize(640, 480, ResizeType.CatmullRom);
    image.Save("ResizedPhoto.jpg");

    image.Resize(1024, 768, ResizeType.CubicConvolution);
    image.Save("ResizedPhoto2.jpg");

    var resizeSettings = new ImageResizeSettings
    {
        Mode = ResizeType.CubicBSpline,
        FilterType = ImageFilterType.SmallRectangular
    };

    image.Resize(800, 800, resizeSettings);
    image.Save("ResizedPhoto3.jpg");
}

This example loads a WMF image and resizes it using various resizing methods.

[C#]

string dir = "c:\\temp\\";

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.wmf"))
{
    // Scale up by 2 times using Nearest Neighbour resampling.
    image.Resize(image.Width * 2, image.Height * 2, Aspose.Imaging.ResizeType.NearestNeighbourResample);
}

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.wmf"))
{
    // Scale down by 2 times using Nearest Neighbour resampling.
    image.Resize(image.Width / 2, image.Height / 2, Aspose.Imaging.ResizeType.NearestNeighbourResample);
}

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.wmf"))
{
    // Scale up by 2 times using Bilinear resampling.
    image.Resize(image.Width * 2, image.Height * 2, Aspose.Imaging.ResizeType.BilinearResample);
}

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.wmf"))
{
    // Scale down by 2 times using Bilinear resampling.
    image.Resize(image.Width / 2, image.Height / 2, Aspose.Imaging.ResizeType.BilinearResample);
}

This example loads an image and resizes it using various resizing methods.

[C#]

string dir = "c:\\temp\\";

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.gif"))
{
    // Scale up by 2 times using Nearest Neighbour resampling.
    image.Resize(image.Width* 2, image.Height* 2, Aspose.Imaging.ResizeType.NearestNeighbourResample);
    image.Save(dir + "upsample.nearestneighbour.gif");
}

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.gif"))
{
    // Scale down by 2 times using Nearest Neighbour resampling.
    image.Resize(image.Width / 2, image.Height / 2, Aspose.Imaging.ResizeType.NearestNeighbourResample);
    image.Save(dir + "downsample.nearestneighbour.gif");
}

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.gif"))
{
    // Scale up by 2 times using Bilinear resampling.
    image.Resize(image.Width* 2, image.Height* 2, Aspose.Imaging.ResizeType.BilinearResample);
    image.Save(dir + "upsample.bilinear.gif");
}

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.gif"))
{
    // Scale down by 2 times using Bilinear resampling.
    image.Resize(image.Width / 2, image.Height / 2, Aspose.Imaging.ResizeType.BilinearResample);
    image.Save(dir + "downsample.bilinear.gif");
}

This example loads a raster image and resizes it using various resizing methods.

[C#]

string dir = "c:\\temp\\";

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.gif"))
{
    // Scale up by 2 times using Nearest Neighbour resampling.
    image.Resize(image.Width * 2, image.Height * 2, Aspose.Imaging.ResizeType.NearestNeighbourResample);
    image.Save(dir + "upsample.nearestneighbour.gif");
}

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.gif"))
{
    // Scale down by 2 times using Nearest Neighbour resampling.
    image.Resize(image.Width / 2, image.Height / 2, Aspose.Imaging.ResizeType.NearestNeighbourResample);
    image.Save(dir + "downsample.nearestneighbour.gif");
}

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.gif"))
{
    // Scale up by 2 times using Bilinear resampling.
    image.Resize(image.Width * 2, image.Height * 2, Aspose.Imaging.ResizeType.BilinearResample);
    image.Save(dir + "upsample.bilinear.gif");
}

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.gif"))
{
    // Scale down by 2 times using Bilinear resampling.
    image.Resize(image.Width / 2, image.Height / 2, Aspose.Imaging.ResizeType.BilinearResample);
    image.Save(dir + "downsample.bilinear.gif");
}

This example loads a multi-page ODG image and resizes it using various resizing methods.

[C#]

string dir = "c:\\temp\\";

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.odg"))
{
    // Scale up by 2 times using Nearest Neighbour resampling.
    image.Resize(image.Width* 2, image.Height* 2, Aspose.Imaging.ResizeType.NearestNeighbourResample);

    // Save to PNG with default options.
    image.Save(dir + "upsample.nearestneighbour.png", new Aspose.Imaging.ImageOptions.PngOptions());
}

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.odg"))
{
    // Scale down by 2 times using Nearest Neighbour resampling.
    image.Resize(image.Width / 2, image.Height / 2, Aspose.Imaging.ResizeType.NearestNeighbourResample);

    // Save to PNG with default options.
    image.Save(dir + "downsample.nearestneighbour.png", new Aspose.Imaging.ImageOptions.PngOptions());
}

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.odg"))
{
    // Scale up by 2 times using Bilinear resampling.
    image.Resize(image.Width* 2, image.Height* 2, Aspose.Imaging.ResizeType.BilinearResample);

    // Save to PNG with default options.
    image.Save(dir + "upsample.bilinear.png", new Aspose.Imaging.ImageOptions.PngOptions());
}

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.odg"))
{
    // Scale down by 2 times using Bilinear resampling.
    image.Resize(image.Width / 2, image.Height / 2, Aspose.Imaging.ResizeType.BilinearResample);

    // Save to PNG with default options.
    image.Save(dir + "downsample.bilinear.png", new Aspose.Imaging.ImageOptions.PngOptions());
}

Using a segment mask to speed up the segmentation process

[C#]

// Masking export options
Aspose.Imaging.ImageOptions.PngOptions exportOptions = new Aspose.Imaging.ImageOptions.PngOptions();
exportOptions.ColorType = Aspose.Imaging.FileFormats.Png.PngColorType.TruecolorWithAlpha;
exportOptions.Source = new Aspose.Imaging.Sources.StreamSource(new System.IO.MemoryStream());

Aspose.Imaging.Masking.Options.MaskingOptions maskingOptions = new Aspose.Imaging.Masking.Options.MaskingOptions();
    
// Use GraphCut clustering.
maskingOptions.Method = Masking.Options.SegmentationMethod.GraphCut;
maskingOptions.Decompose = false;
maskingOptions.Args = new Aspose.Imaging.Masking.Options.AutoMaskingArgs();

// The backgroung color will be transparent.
maskingOptions.BackgroundReplacementColor = Aspose.Imaging.Color.Transparent;
maskingOptions.ExportOptions = exportOptions;

string dir = "c:\\temp\\";
using (Aspose.Imaging.RasterImage image = (Aspose.Imaging.RasterImage)Aspose.Imaging.Image.Load(dir + "BigImage.jpg"))
{
    Aspose.Imaging.Size imageSize = image.Size;

    // Reducing image size to speed up the segmentation process
    image.ResizeHeightProportionally(600, Aspose.Imaging.ResizeType.HighQualityResample);

    // Create an instance of the ImageMasking class.
    Aspose.Imaging.Masking.ImageMasking masking = new Aspose.Imaging.Masking.ImageMasking(image);

    // Divide the source image into several clusters (segments).
    using (Aspose.Imaging.Masking.Result.MaskingResult maskingResult = masking.Decompose(maskingOptions))
    {
        // Getting the foreground mask
        using (Aspose.Imaging.RasterImage foregroundMask = maskingResult[1].GetMask()) 
        {
            // Increase the size of the mask to the size of the original image
            foregroundMask.Resize(imageSize.Width, imageSize.Height, Aspose.Imaging.ResizeType.NearestNeighbourResample);

            // Applying the mask to the original image to obtain a foreground segment
            using (Aspose.Imaging.RasterImage originImage = (Aspose.Imaging.RasterImage)Aspose.Imaging.Image.Load(dir + "BigImage.jpg"))
            {
                Aspose.Imaging.Masking.ImageMasking.ApplyMask(originImage, foregroundMask, maskingOptions);
                originImage.Save(dir + "BigImage_foreground.png", exportOptions);
            }
        }
    }
}

See Also

Resize(int, int, ImageResizeSettings)

Resizes the image.

public abstract void Resize(int newWidth, int newHeight, ImageResizeSettings settings)
ParameterTypeDescription
newWidthInt32The new width.
newHeightInt32The new height.
settingsImageResizeSettingsThe resize settings.

Examples

Resize image using specific Resize Type.

[C#]

using (var image = Image.Load("Photo.jpg"))
{
    image.Resize(640, 480, ResizeType.CatmullRom);
    image.Save("ResizedPhoto.jpg");

    image.Resize(1024, 768, ResizeType.CubicConvolution);
    image.Save("ResizedPhoto2.jpg");

    var resizeSettings = new ImageResizeSettings
    {
        Mode = ResizeType.CubicBSpline,
        FilterType = ImageFilterType.SmallRectangular
    };

    image.Resize(800, 800, resizeSettings);
    image.Save("ResizedPhoto3.jpg");
}

Resize EPS image using advanced settings.

[C#]

// Load EPS image
using (var image = Image.Load("AstrixObelix.eps"))
{
    // Resize the image using advanced resize settings
    image.Resize(400, 400, new ImageResizeSettings
    {
        // Set the interpolation mode
        Mode = ResizeType.LanczosResample,

        // Set the type of the filter
        FilterType = ImageFilterType.SmallRectangular,

        // Sets the color compare method
        ColorCompareMethod = ColorCompareMethod.Euclidian,

        // Set the color quantization method
        ColorQuantizationMethod = ColorQuantizationMethod.Popularity
    });

    // Export image to PNG format
    image.Save("ExportResult.png", new PngOptions());
}

This example loads an image and resizes it using various resizing settings.

[C#]

string dir = "c:\\temp\\";

Aspose.Imaging.ImageResizeSettings resizeSettings = new Aspose.Imaging.ImageResizeSettings();

// The adaptive algorithm based on weighted and blended rational function and lanczos3 interpolation.
resizeSettings.Mode = Aspose.Imaging.ResizeType.AdaptiveResample;

// The small rectangular filter
resizeSettings.FilterType = Aspose.Imaging.ImageFilterType.SmallRectangular;

// The number of colors in the palette.
resizeSettings.EntriesCount = 256;

// The color quantization is not used
resizeSettings.ColorQuantizationMethod = ColorQuantizationMethod.None;

// The euclidian method
resizeSettings.ColorCompareMethod = ColorCompareMethod.Euclidian;

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.gif"))
{
    // Scale down by 2 times using adaptive resampling.
    image.Resize(image.Width / 2, image.Height / 2, resizeSettings);
    image.Save(dir + "downsample.adaptive.gif");
}

See Also

Resize(int, int)

Resizes the image. The default NearestNeighbourResample is used.

public void Resize(int newWidth, int newHeight)
ParameterTypeDescription
newWidthInt32The new width.
newHeightInt32The new height.

Examples

The following example shows how to resize a metafile (WMF and EMF).

[C#]

string dir = "c:\\aspose.imaging\\issues\\net\\3280\\";
string[] fileNames = new[] { "image3.emf", "image4.wmf" };
foreach (string fileName in fileNames)
{
    string inputFilePath = dir + fileName;
    string outputFilePath = dir + "Downscale_" + fileName;

    using (Aspose.Imaging.FileFormats.Emf.MetaImage image = (Aspose.Imaging.FileFormats.Emf.MetaImage)Aspose.Imaging.Image.Load(inputFilePath))
    {
        image.Resize(image.Width / 4, image.Height / 4);
        image.Save(outputFilePath);
    }
}

The following example shows how to resize SVG image and save it to PNG.

[C#]

string dir = "c:\\aspose.imaging\\net\\issues\\3549";
string[] fileNames = new string[]
{
    "Logotype.svg",
    "sample_car.svg",
    "rg1024_green_grapes.svg",
    "MidMarkerFigure.svg",
    "embeddedFonts.svg"
};

Aspose.Imaging.PointF[] scales = new Aspose.Imaging.PointF[]
{
    new Aspose.Imaging.PointF(0.5f, 0.5f),
    new Aspose.Imaging.PointF(1f, 1f),
    new Aspose.Imaging.PointF(2f, 2f),
    new Aspose.Imaging.PointF(3.5f, 9.2f),
};

foreach (string inputFile in fileNames)
{
    foreach (Aspose.Imaging.PointF scale in scales)
    {
        string outputFile = string.Format("{0}_{1}_{2}.png", inputFile, scale.X.ToString(System.Globalization.CultureInfo.InvariantCulture), scale.Y.ToString(System.Globalization.CultureInfo.InvariantCulture));
        using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(System.IO.Path.Combine(dir, inputFile)))
        {
            image.Resize((int)(image.Width * scale.X), (int)(image.Height * scale.Y));
            image.Save(System.IO.Path.Combine(dir, outputFile), new Aspose.Imaging.ImageOptions.PngOptions());
        }
    }
}

See Also

Image.RemoveMetadata Image.ResizeHeightProportionally