HowTo : add resize of images or photos using more than 10 resampling types to your java application or Web service.

readme.md

Aspose.Imaging Java API allows to easy resize your images or photos in your java application or Web service.

You can:

• resize raster images;
• resize vector images;
• use set of various resample algorithms.

Interested ?

You may go further at : https://products.aspose.com/imaging/java/

resize-bitmap-formats-without-exporter.java

import com.aspose.imaging.Image;
import com.aspose.imaging.ResizeType;
import com.aspose.imaging.fileformats.tiff.enums.TiffExpectedFormat;
import com.aspose.imaging.imageoptions.TiffOptions;
import java.util.Arrays;
import java.util.List;
import java.util.function.Consumer;


// Folder that contains images to process
final String templatesFolder = "c:\\Users\\USER\\Downloads\\";

List<String> rasterFormats = Arrays.asList("dng", "djvu");

rasterFormats.forEach(new Consumer<String>()
{
	@Override
	public void accept(String formatExt)
	{
		String inputFile = templatesFolder + "template." + formatExt;
		String outputFile = templatesFolder + "resized.tiff";

		int newWidth = 300;
		int newHeight = 800;

		try (Image image = Image.load(inputFile))
		{
			// Resize operation supports 16 possible types:
			// LeftTopToLeftTop, RightTopToRightTop, RightBottomToRightBottom,
			// LeftBottomToLeftBottom, CenterToCenter, LanczosResample,
			// NearestNeighbourResample, AdaptiveResample, BilinearResample,
			// HighQualityResample, CatmullRom, CubicConvolution,
			// CubicBSpline, Mitchell, SinC
			// More information available at https://apireference.aspose.com/imaging/net/aspose.imaging/resizetype
			// and https://apireference.aspose.com/imaging/net/aspose.imaging.image/resize/methods/2
			image.resize(newWidth, newHeight, ResizeType.HighQualityResample);
			image.save(outputFile, new TiffOptions(TiffExpectedFormat.TiffJpegRgb));
		}
	}
});

resize-bitmap-formats.java

import com.aspose.imaging.Image;
import com.aspose.imaging.ResizeType;
import java.util.Arrays;
import java.util.List;
import java.util.function.Consumer;



// Folder that contains images to process
final String templatesFolder = "c:\\Users\\USER\\Downloads\\";

List<String> rasterFormats = Arrays.asList("png", "bmp", "apng", "dicom",
		"jpg", "jp2", "j2k", "tga", "webp", "tif", "gif");

final int[] i = {0};
final Long[] resizeTypes = ResizeType.getValues(ResizeType.class);
rasterFormats.forEach(new Consumer<String>()
{
	@Override
	public void accept(String formatExt)
	{
		String inputFile = templatesFolder + "template." + formatExt;
		String outputFile = templatesFolder + "resized" + formatExt;

		int newWidth = 300;
		int newHeight = 800;

		try (Image image = Image.load(inputFile))
		{
			// Resize operation supports 16 possible types:
			// LeftTopToLeftTop, RightTopToRightTop, RightBottomToRightBottom,
			// LeftBottomToLeftBottom, CenterToCenter, LanczosResample,
			// NearestNeighbourResample, AdaptiveResample, BilinearResample,
			// HighQualityResample, CatmullRom, CubicConvolution,
			// CubicBSpline, Mitchell, SinC
			// More information available at https://apireference.aspose.com/imaging/net/aspose.imaging/resizetype
			// and https://apireference.aspose.com/imaging/net/aspose.imaging.image/resize/methods/2
			image.resize(newWidth, newHeight, resizeTypes[i[0]].intValue());
			i[0] = (i[0] + 1) % resizeTypes.length; // take the next ResizeType
			image.save(outputFile);
		}
	}
});

resize-svg-image.java

import com.aspose.imaging.Image;
import com.aspose.imaging.ResizeType;
import java.util.Arrays;
import java.util.List;
import java.util.function.Consumer;



// Folder that contains images to process
final String templatesFolder = "c:\\Users\\USER\\Downloads\\";

List<String> rasterFormats = Arrays.asList("svg", "svgz");

rasterFormats.forEach(new Consumer<String>()
{
	@Override
	public void accept(String formatExt)
	{
		String inputFile = templatesFolder + "template." + formatExt;
		String outputFile = templatesFolder + "resized." + formatExt;

		int newWidth = 300;
		int newHeight = 800;

		try (Image image = Image.load(inputFile))
		{
			// Resize operation supports 16 possible types:
			// LeftTopToLeftTop, RightTopToRightTop, RightBottomToRightBottom,
			// LeftBottomToLeftBottom, CenterToCenter, LanczosResample,
			// NearestNeighbourResample, AdaptiveResample, BilinearResample,
			// HighQualityResample, CatmullRom, CubicConvolution,
			// CubicBSpline, Mitchell, SinC
			// More information available at https://apireference.aspose.com/imaging/net/aspose.imaging/resizetype
			// and https://apireference.aspose.com/imaging/net/aspose.imaging.image/resize/methods/2
			image.resize(newWidth, newHeight, ResizeType.CatmullRom);
			image.save(outputFile);
		}
	}
});

resize-vector-images-with-rasterization.java

import com.aspose.imaging.FileFormat;
import com.aspose.imaging.Image;
import com.aspose.imaging.imageoptions.*;
import com.aspose.ms.System.NotSupportedException;
import java.util.Arrays;
import java.util.List;
import java.util.function.Consumer;



// Folder that contains images to process
final String templatesFolder = "c:\\Users\\USER\\Downloads\\";
List<String> vectorFormats = Arrays.asList("emf", "emz", "wmf", "wmz", "svg", "svgz", "cdr", "cmx", "odg", "otg");

vectorFormats.forEach(new Consumer<String>()
{
	@Override
	public void accept(String formatExt)
	{
		String inputFile = templatesFolder + "template." + formatExt;
		String outputFile = templatesFolder + "resized_" + formatExt.toUpperCase() + ".png";

		int newWidth = 500;
		int newHeight = 400;

		try (Image image = Image.load(inputFile))
		{
			PngOptions exportOptions = new PngOptions();
			switch ((int) image.getFileFormat())
			{
				case (int) FileFormat.Wmf:
					exportOptions.setVectorRasterizationOptions(new WmfRasterizationOptions());
					break;
				case (int) FileFormat.Emf:
					exportOptions.setVectorRasterizationOptions(new EmfRasterizationOptions());
					break;
				case (int) FileFormat.Svg:
					exportOptions.setVectorRasterizationOptions(new SvgRasterizationOptions());
					break;
				case (int) FileFormat.Cdr:
					exportOptions.setVectorRasterizationOptions(new CdrRasterizationOptions());
					break;
				case (int) FileFormat.Cmx:
					exportOptions.setVectorRasterizationOptions(new CmxRasterizationOptions());
					break;
				case (int) FileFormat.Odg:
					exportOptions.setVectorRasterizationOptions(new OdgRasterizationOptions());
					break;
				case (int) FileFormat.Otg:
					exportOptions.setVectorRasterizationOptions(new OtgRasterizationOptions());
					break;
				default:
					throw new NotSupportedException();
			}

			exportOptions.getVectorRasterizationOptions().setPageWidth(newWidth);
			exportOptions.getVectorRasterizationOptions().setPageHeight(newHeight);
			image.save(outputFile, exportOptions);
		}
	}
});