All Downloads are FREE. Search and download functionalities are using the official Maven repository.

boofcv.io.image.UtilImageIO Maven / Gradle / Ivy

Go to download

BoofCV is an open source Java library for real-time computer vision and robotics applications.

The newest version!
/*
 * Copyright (c) 2022, Peter Abeles. All Rights Reserved.
 *
 * This file is part of BoofCV (http://boofcv.org).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package boofcv.io.image;

import boofcv.BoofVersion;
import boofcv.io.UtilIO;
import boofcv.io.wrapper.DefaultMediaManager;
import boofcv.struct.image.*;
import org.apache.commons.io.FilenameUtils;
import org.ddogleg.struct.DogArray_I8;
import org.jetbrains.annotations.Nullable;

import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;
import java.awt.image.*;
import java.io.*;
import java.net.URL;
import java.net.URLDecoder;
import java.nio.file.Files;
import java.util.*;

import static boofcv.io.UtilIO.UTF8;
import static java.nio.charset.StandardCharsets.UTF_8;

/**
 * Class for loading and saving images.
 *
 * @author Peter Abeles
 */
public class UtilImageIO {

	/**
	 * List of supported image types
	 */
	public static final String[] IMAGE_SUFFIXES;

	static {
		// Add the known Java ones
		String[] suffixes = ImageIO.getReaderFileSuffixes();
		IMAGE_SUFFIXES = new String[suffixes.length + 2];
		for (int i = 0; i < suffixes.length; i++) {
			IMAGE_SUFFIXES[i] = suffixes[i];
		}
		// Add ones supported by BoofCV
		IMAGE_SUFFIXES[suffixes.length] = "ppm";
		IMAGE_SUFFIXES[suffixes.length + 1] = "pgm";
	}

	public static boolean isKnownSuffix( String suffix ) {
		for (String s : UtilImageIO.IMAGE_SUFFIXES) {
			if (s.equalsIgnoreCase(suffix)) {
				return true;
			}
		}
		return false;
	}

	/**
	 * A function that load the specified image. If anything goes wrong it returns a
	 * null.
	 */
	public static @Nullable BufferedImage loadImage( String fileName ) {
		return loadImage(UtilIO.ensureURL(fileName));
	}

	public static BufferedImage loadImageNotNull( String fileName ) {
		return Objects.requireNonNull(loadImage(UtilIO.ensureURL(fileName)), "Couldn't load '" + fileName + "'");
	}

	public static @Nullable BufferedImage loadImage( String directory, String fileName ) {
		return loadImage(new File(directory, fileName).getPath());
	}

	public static BufferedImage loadImageNotNull( String directory, String fileName ) {
		return Objects.requireNonNull(loadImage(directory, fileName));
	}

	/**
	 * Loads all the image in the specified directory which match the provided regex
	 *
	 * @param directory File directory
	 * @param regex Regex used to match file names
	 * @return List of found images.
	 */
	public static List loadImages( String directory, final String regex ) {

		List paths = UtilIO.listByRegex(directory, regex);

		List ret = new ArrayList<>();

		if (paths.size() == 0)
			return ret;

		// Sort so that the order is deterministic
		Collections.sort(paths);

		for (String path : paths) {
			BufferedImage img = loadImage(path);
			if (img != null)
				ret.add(img);
		}

		return ret;
	}

	/**
	 * A function that load the specified image. If anything goes wrong it returns a
	 * null.
	 */
	public static @Nullable BufferedImage loadImage( @Nullable URL url ) {
		if (url == null)
			return null;
		try {
			BufferedImage buffered = ImageIO.read(url);
			if (buffered != null)
				return buffered;
			if (url.getProtocol().equals("file")) {
				String path = URLDecoder.decode(url.getPath(), UTF8);
				if (!new File(path).exists()) {
					System.err.println("File does not exist: " + path);
					return null;
				}
			}
		} catch (IOException ignore) {
		}
		try {
			InputStream stream = url.openStream();
			String path = url.toString();
			if (path.toLowerCase().endsWith("ppm")) {
				return loadPPM(stream, null);
			} else if (path.toLowerCase().endsWith("pgm")) {
				return loadPGM(stream, null);
			}
			stream.close();
		} catch (IOException ignore) {
		}

		return null;
	}

	/**
	 * Loads the image and converts into the specified image type.
	 *
	 * @param fileName Path to image file.
	 * @param imageType Type of image that should be returned.
	 * @return The image or null if the image could not be loaded.
	 */
	public static > @Nullable T loadImage( String fileName, Class imageType ) {
		BufferedImage img = loadImage(fileName);
		if (img == null)
			return null;

		return ConvertBufferedImage.convertFromSingle(img, (T)null, imageType);
	}

	public static > @Nullable T loadImage( String directory, String fileName, Class imageType ) {
		return loadImage(new File(directory, fileName).getPath(), imageType);
	}

	public static > @Nullable T loadImage( File image, boolean orderRgb, ImageType imageType ) {
		BufferedImage img = loadImage(image.getPath());
		if (img == null)
			return null;

		T output = imageType.createImage(img.getWidth(), img.getHeight());
		ConvertBufferedImage.convertFrom(img, orderRgb, output);
		return output;
	}

	public static > @Nullable T loadImage( String imagePath, boolean orderRgb, T output ) {
		BufferedImage buffered = loadImage(imagePath);
		if (buffered == null)
			return null;

		ConvertBufferedImage.convertFrom(buffered, orderRgb, output);

		return output;
	}

	/**
	 * Saves the {@link BufferedImage} to the specified file. The image type of the output is determined by
	 * the name's extension. By default the file is saved using {@link ImageIO#write(RenderedImage, String, File)}}
	 * but if that fails then it will see if it can save it using BoofCV native code for PPM and PGM.
	 *
	 * @param img Image which is to be saved.
	 * @param fileName Name of the output file. The type is determined by the extension.
	 */
	public static void saveImage( BufferedImage img, String fileName ) {
		try {
			String type;
			String[] a = fileName.split("[.]");
			if (a.length > 0) {
				type = a[a.length - 1];
			} else {
				type = "jpg";
			}

			if (!ImageIO.write(img, type, new File(fileName))) {
				if (fileName.endsWith("ppm") || fileName.endsWith("PPM")) {
					Planar color = ConvertBufferedImage.convertFromPlanar(img, null, true, GrayU8.class);
					savePPM(color, fileName, null);
				} else if (fileName.endsWith("pgm") || fileName.endsWith("PGM")) {
					GrayU8 gray = ConvertBufferedImage.convertFrom(img, (GrayU8)null);
					savePGM(gray, fileName);
				} else
					throw new IllegalArgumentException("No writer appropriate found");
			}
		} catch (IOException e) {
			throw new UncheckedIOException(e);
		}
	}

	/**
	 * Saves a jpeg image to disk with an adjustable quality setting.
	 *
	 * @param img Image that's to be saved
	 * @param path Where it should save the image
	 * @param quality 0 to 1.0. 0 = lowest quality and 1.0 = best quality.
	 */
	public static void saveJpeg( BufferedImage img, String path, double quality ) {
		try {
			// in a unit test it seemed to append to the file otherwise
			var file = new File(path);
			if (file.exists())
				file.delete();
			ImageOutputStream ios = ImageIO.createImageOutputStream(file);
			Iterator iter = ImageIO.getImageWritersByFormatName("jpeg");
			ImageWriter writer = iter.next();
			ImageWriteParam iwp = writer.getDefaultWriteParam();
			iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
			iwp.setCompressionQuality((float)quality);
			writer.setOutput(ios);
			writer.write(null, new IIOImage(img, null, null), iwp);
			writer.dispose();
		} catch (IOException e) {
			throw new UncheckedIOException(e);
		}
	}

	/**
	 * 

Saves the BoofCV formatted image. This is identical to the following code:

* *
	 * BufferedImage out = ConvertBufferedImage.convertTo(image,null,true);
	 * saveImage(out,fileName);
	 * 
* * @param image Image which is to be saved. * @param fileName Name of the output file. The type is determined by the extension. */ public static void saveImage( ImageBase image, String fileName ) { BufferedImage out = ConvertBufferedImage.convertTo(image, null, true); saveImage(out, fileName); } /** * Loads a PPM image from a file. * * @param fileName Location of PPM image * @param storage (Optional) Storage for output image. Must be the width and height of the image being read. * Better performance of type BufferedImage.TYPE_INT_RGB. If null or width/height incorrect a new image * will be declared. * @return The read in image * @throws IOException Thrown if there is a problem reading the image */ public static BufferedImage loadPPM( String fileName, BufferedImage storage ) throws IOException { return loadPPM(new FileInputStream(fileName), storage); } /** * Loads a PGM image from a file. * * @param fileName Location of PGM image * @param storage (Optional) Storage for output image. Must be the width and height of the image being read. * Better performance of type BufferedImage.TYPE_BYTE_GRAY. If null or width/height incorrect a new image * will be declared. * @return The image * @throws IOException Thrown if there is a problem reading the image */ public static BufferedImage loadPGM( String fileName, BufferedImage storage ) throws IOException { return loadPGM(new FileInputStream(fileName), storage); } /** * Loads a PPM image from an {@link InputStream}. * * @param inputStream InputStream for PPM image * @param storage (Optional) Storage for output image. Must be the width and height of the image being read. * Better performance of type BufferedImage.TYPE_INT_RGB. If null or width/height incorrect a new image * will be declared. * @return The read in image * @throws IOException Thrown if there is a problem reading the image */ public static BufferedImage loadPPM( InputStream inputStream, @Nullable BufferedImage storage ) throws IOException { DataInputStream in = new DataInputStream(inputStream); readLine(in); String line = readLine(in); while (line.charAt(0) == '#') line = readLine(in); String[] s = line.split(" "); int w = Integer.parseInt(s[0]); int h = Integer.parseInt(s[1]); readLine(in); if (storage == null || storage.getWidth() != w || storage.getHeight() != h) storage = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB); int length = w*h*3; byte[] data = new byte[length]; read(in, data, length); boolean useFailSafe = storage.getType() != BufferedImage.TYPE_INT_RGB; // try using the internal array for better performance if (storage.getRaster().getDataBuffer().getDataType() == DataBuffer.TYPE_INT) { int[] rgb = ((DataBufferInt)storage.getRaster().getDataBuffer()).getData(); int indexIn = 0; int indexOut = 0; for (int y = 0; y < h; y++) { for (int x = 0; x < w; x++) { rgb[indexOut++] = ((data[indexIn++] & 0xFF) << 16) | ((data[indexIn++] & 0xFF) << 8) | (data[indexIn++] & 0xFF); } } } if (useFailSafe) { // use the slow setRGB() function int indexIn = 0; for (int y = 0; y < h; y++) { for (int x = 0; x < w; x++) { storage.setRGB(x, y, ((data[indexIn++] & 0xFF) << 16) | ((data[indexIn++] & 0xFF) << 8) | (data[indexIn++] & 0xFF)); } } } return storage; } /** * Loads a PGM image from an {@link InputStream}. * * @param inputStream InputStream for PGM image * @param storage (Optional) Storage for output image. Must be the width and height of the image being read. * Better performance of type BufferedImage.TYPE_BYTE_GRAY. If null or width/height incorrect a new image * will be declared. * @return The read in image */ public static BufferedImage loadPGM( InputStream inputStream, @Nullable BufferedImage storage ) throws IOException { DataInputStream in = new DataInputStream(inputStream); readLine(in); String line = readLine(in); while (line.charAt(0) == '#') line = readLine(in); String[] s = line.split(" "); int w = Integer.parseInt(s[0]); int h = Integer.parseInt(s[1]); readLine(in); if (storage == null || storage.getWidth() != w || storage.getHeight() != h) storage = new BufferedImage(w, h, BufferedImage.TYPE_BYTE_GRAY); int length = w*h; byte[] data = new byte[length]; read(in, data, length); boolean useFailSafe = storage.getType() != BufferedImage.TYPE_BYTE_GRAY; // try using the internal array for better performance if (storage.getRaster().getDataBuffer().getDataType() == DataBuffer.TYPE_BYTE) { byte[] gray = ((DataBufferByte)storage.getRaster().getDataBuffer()).getData(); int indexIn = 0; int indexOut = 0; for (int y = 0; y < h; y++) { for (int x = 0; x < w; x++) { gray[indexOut++] = data[indexIn++]; } } } if (useFailSafe) { // use the slow setRGB() function int indexIn = 0; for (int y = 0; y < h; y++) { for (int x = 0; x < w; x++) { int gray = data[indexIn++] & 0xFF; storage.setRGB(x, y, gray << 16 | gray << 8 | gray); } } } return storage; } /** * Reads a PPM image file directly into a Planar image. To improve performance when reading * many images, the user can provide work space memory in the optional parameters * * @param fileName Location of PPM file * @param storage (Optional) Where the image is written in to. Will be resized if needed. * If null or the number of bands isn't 3, a new instance is declared. * @param temp (Optional) Used internally to store the image. Can be null. * @return The image. * @throws IOException Thrown if there is a problem reading the image */ public static Planar loadPPM_U8( String fileName, Planar storage, DogArray_I8 temp ) throws IOException { return loadPPM_U8(new FileInputStream(fileName), storage, temp); } /** * Reads a PPM image file directly into a Planar image. To improve performance when reading * many images, the user can provide work space memory in the optional parameters * * @param inputStream InputStream for PPM image * @param storage (Optional) Where the image is written in to. Will be resized if needed. * If null or the number of bands isn't 3, a new instance is declared. * @param temp (Optional) Used internally to store the image. Can be null. * @return The image. * @throws IOException Thrown if there is a problem reading the image */ public static Planar loadPPM_U8( InputStream inputStream, Planar storage, DogArray_I8 temp ) throws IOException { DataInputStream in = new DataInputStream(inputStream); readLine(in); String line = readLine(in); while (line.charAt(0) == '#') line = readLine(in); String[] s = line.split(" "); int w = Integer.parseInt(s[0]); int h = Integer.parseInt(s[1]); readLine(in); if (storage == null || storage.getNumBands() != 3) storage = new Planar<>(GrayU8.class, w, h, 3); else storage.reshape(w, h); int length = w*h*3; if (temp == null) temp = new DogArray_I8(length); temp.resize(length); byte[] data = temp.data; read(in, data, length); GrayU8 band0 = storage.getBand(0); GrayU8 band1 = storage.getBand(1); GrayU8 band2 = storage.getBand(2); int indexIn = 0; for (int y = 0; y < storage.height; y++) { int indexOut = storage.startIndex + y*storage.stride; for (int x = 0; x < storage.width; x++, indexOut++) { band0.data[indexOut] = data[indexIn++]; band1.data[indexOut] = data[indexIn++]; band2.data[indexOut] = data[indexIn++]; } } return storage; } /** * Loads a PGM image from an {@link InputStream}. * * @param fileName InputStream for PGM image * @param storage (Optional) Storage for output image. Must be the width and height of the image being read. * If null a new image will be declared. * @return The read in image * @throws IOException Thrown if there is a problem reading the image */ public static GrayU8 loadPGM_U8( String fileName, @Nullable GrayU8 storage ) throws IOException { return loadPGM_U8(new FileInputStream(fileName), storage); } /** * Loads a PGM image from an {@link InputStream}. * * @param inputStream InputStream for PGM image * @param storage (Optional) Storage for output image. Must be the width and height of the image being read. * If null a new image will be declared. * @return The read in image * @throws IOException Thrown if there is a problem reading the image */ public static GrayU8 loadPGM_U8( InputStream inputStream, @Nullable GrayU8 storage ) throws IOException { DataInputStream in = new DataInputStream(inputStream); readLine(in); String line = readLine(in); while (line.charAt(0) == '#') line = readLine(in); String[] s = line.split(" "); int w = Integer.parseInt(s[0]); int h = Integer.parseInt(s[1]); readLine(in); if (storage == null) storage = new GrayU8(w, h); read(in, storage.data, w*h); return storage; } /** * Saves an image in PPM format. * * @param rgb 3-band RGB image * @param fileName Location where the image is to be written to. * @param temp (Optional) Used internally to store the image. Can be null. * @throws IOException Thrown if there is a problem reading the image */ public static void savePPM( Planar rgb, String fileName, @Nullable DogArray_I8 temp ) throws IOException { File out = new File(fileName); DataOutputStream os = new DataOutputStream(new FileOutputStream(out)); String header = String.format("P6\n%d %d\n255\n", rgb.width, rgb.height); os.write(header.getBytes(UTF_8)); if (temp == null) temp = new DogArray_I8(); temp.resize(rgb.width*rgb.height*3); byte[] data = temp.data; GrayU8 band0 = rgb.getBand(0); GrayU8 band1 = rgb.getBand(1); GrayU8 band2 = rgb.getBand(2); int indexOut = 0; for (int y = 0; y < rgb.height; y++) { int index = rgb.startIndex + y*rgb.stride; for (int x = 0; x < rgb.width; x++, index++) { data[indexOut++] = band0.data[index]; data[indexOut++] = band1.data[index]; data[indexOut++] = band2.data[index]; } } os.write(data, 0, temp.size); os.close(); } /** * Saves an image in PGM format. * * @param gray Gray scale image * @param fileName Location where the image is to be written to. * @throws IOException Thrown if there is a problem reading the image */ public static void savePGM( GrayU8 gray, String fileName ) throws IOException { File out = new File(fileName); DataOutputStream os = new DataOutputStream(new FileOutputStream(out)); String header = String.format("P5\n%d %d\n255\n", gray.width, gray.height); os.write(header.getBytes(UTF_8)); os.write(gray.data, 0, gray.width*gray.height); os.close(); } /** * Saves a labeled image in a RLE format. * * @param labeled (Input) Labeled image to save * @param fileName (Input) Location where the image is to be written to. * @throws IOException Thrown if there is a problem reading the image * @see LabeledImageRleCodec */ public static void saveLabeledRle( GrayS32 labeled, String fileName ) throws IOException { FileOutputStream out = new FileOutputStream(fileName); LabeledImageRleCodec.encode(labeled, out, "BoofCV " + BoofVersion.VERSION); out.close(); } /** * Loads a labeled image in a RLE format. * * @param fileName Location where the image is to be read from. * @param labeled (Input) Optional storage for loaded labeled image * @throws IOException Thrown if there is a problem reading the image * @see LabeledImageRleCodec */ public static GrayS32 loadLabeledRle( String fileName, @Nullable GrayS32 labeled ) throws IOException { if (labeled == null) labeled = new GrayS32(1, 1); var input = new FileInputStream(fileName); LabeledImageRleCodec.decode(input, labeled); input.close(); return labeled; } private static String readLine( DataInputStream in ) throws IOException { String s = ""; while (true) { int b = in.read(); if (b == '\n') return s; else s += (char)b; } } private static void read( DataInputStream in, byte[] data, int length ) throws IOException { int total = 0; while (total < length) { total += in.read(data, total, length - total); } } /** * Uses mime type to determine if it's an image or not. If mime fails it will look at the suffix. This * isn't 100% correct. */ public static boolean isImage( File file ) { try { String mimeType = Files.probeContentType(file.toPath()); if (mimeType == null) { // In some OS there is a bug where it always returns null/ String extension = FilenameUtils.getExtension(file.getName()).toLowerCase(); if (isKnownSuffix(extension)) return true; } else { return mimeType.startsWith("image"); } } catch (IOException ignore) { } return false; } /** * Converts a video into a sequence of png images. If the output does not exist a directory will * be created. * * @param pathVideo Path to video * @param pathOutput Path to destination */ public static void videoToImages( String pathVideo, String pathOutput ) { // Make sure the output path exists UtilIO.mkdirs(new File(pathOutput)); // Load te video SimpleImageSequence sequence = DefaultMediaManager.INSTANCE.openVideo(pathVideo, ImageType.IL_U8); if (sequence == null) throw new RuntimeException("Failed to load video sequence '" + pathVideo + "'"); // Extract the frames int frame = 0; while (sequence.hasNext()) { InterleavedU8 image = sequence.next(); File imageFile = new File(pathOutput, String.format("frame%04d.png", frame++)); UtilImageIO.saveImage(image, imageFile.getPath()); } } }




© 2015 - 2024 Weber Informatics LLC | Privacy Policy