How to adjust an image

How to adjust an image

         You can adjust an image brightness by using the AdjustBrightness method and set a brightness parameter in a range from -255 to 255 for performing corrections. The same you can do with AdjustContrast method to make contrast corrections with parameter settings to a range from -100 and 100. If the image has a color component domination, you can make gamma corrections by setting the Red, Green and Blue components coefficient using AdjustGamma method:

import com.aspose.imaging.IMultipageImage;
import com.aspose.imaging.Image;
import com.aspose.imaging.RasterImage;
import com.aspose.imaging.imageoptions.PngOptions;
import java.io.File;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import java.util.function.Consumer;



adjustBrightness();


public static void adjustGammaRGB()
{
	filterImages(image ->
			{
					//https://apireference.aspose.com/imaging/java/com.aspose.imaging/RasterImage#adjustGamma-float-float-float-
					image.adjustGamma(5, 0.1f, 0.1f);
			}, "adjustgammargb");
}

public static void adjustGamma()
{
	filterImages(image ->
			{
					//https://apireference.aspose.com/imaging/java/com.aspose.imaging/RasterImage#adjustGamma-float-
					image.adjustGamma(3);
			}, "adjustgamma");
}


public static void adjustContrast()
{
	filterImages(image ->
			{
					//https://apireference.aspose.com/imaging/java/com.aspose.imaging/RasterImage#adjustContrast-float-
					image.adjustContrast(50);
			}, "adjustcontrast");
}

public static void adjustBrightness()
{
	filterImages(image ->
			{
					//https://apireference.aspose.com/imaging/java/com.aspose.imaging/RasterImage#adjustBrightness-int-
					image.adjustBrightness(100);
			}, "adjustbrightness");
}

static String templatesFolder = "D:\\";

public static void filterImages(Consumer<RasterImage> doFilter, String filterName)
{
	List<String> rasterFormats = Arrays.asList("jpg", "png", "bmp", "apng", "dicom",
			"jp2", "j2k", "tga", "webp", "tif", "gif", "ico");
	List<String> vectorFormats = Arrays.asList("svg", "otg", "odg", "eps", "wmf", "emf", "wmz", "emz", "cmx", "cdr");

	List<String> allFormats = new LinkedList<>(rasterFormats);
	allFormats.addAll(vectorFormats);

	allFormats.forEach(
			formatExt ->
			{
				String inputFile = templatesFolder + "template." + formatExt;
				boolean isVectorFormat = vectorFormats.contains(formatExt);

				//Need to rasterize vector formats before background remove
				if (isVectorFormat)
				{
					inputFile = rasterizeVectorImage(formatExt, inputFile);
				}

				String outputFile = templatesFolder + String.format("%s_%s.png", filterName, formatExt);

				System.out.println("Processing " + formatExt);

				try (RasterImage image = (RasterImage) Image.load(inputFile))
				{
					doFilter.accept(image);

					//If image is multipage save each page to png to demonstrate results
					if (image instanceof IMultipageImage && ((IMultipageImage) image).getPageCount() > 1)
					{
						IMultipageImage multiPage = (IMultipageImage) image;
						final int pageCount = multiPage.getPageCount();
						final Image[] pages = multiPage.getPages();
						for (int pageIndex = 0; pageIndex < pageCount; pageIndex++)
						{
							String fileName = String.format("%s_page%d_%s.png", filterName, pageIndex, formatExt);
							pages[pageIndex].save(fileName, new PngOptions());
						}
					}
					else
					{
						image.save(outputFile, new PngOptions());
					}
				}

				//Remove rasterized vector image
				if (isVectorFormat)
				{
					new File(inputFile).delete();
				}
			}
	);
}

private static String rasterizeVectorImage(String formatExt, String inputFile)
{
	String outputFile = templatesFolder + "rasterized."+ formatExt + ".png";
	try (Image image = Image.load(inputFile))
	{
		image.save(outputFile, new PngOptions());
	}

	return outputFile;
}