Why does ImageReader return an invalid BufferedImage?

Question

I am trying to access an animated GIF image with 21 frames, and then read the 12th (because it starts at 0?) Frame.

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.imageio.ImageIO;
import javax.imageio.ImageReader;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.filefilter.IOFileFilter;
import org.apache.commons.io.filefilter.SuffixFileFilter;
import org.apache.commons.io.filefilter.TrueFileFilter;

public class PictureSearch {

    public static void search(File file) {
        try {
            ImageReader reader = (ImageReader) ImageIO.getImageReadersBySuffix("gif").next();
            reader.setInput(ImageIO.createImageInputStream(file), false);
            BufferedImage caption = reader.read(12);

            System.out.println(caption.getHeight());
            System.out.println(caption.getWidth());

            caption.flush();

        } catch (IOException e) {
            System.out.println(e);
        }
    }

    public static void main(String[] args) throws IOException {
        List<String> suffixes = new ArrayList<String>();
        suffixes.add(".jpg");
        suffixes.add(".gif");
        suffixes.add(".bmp");
        suffixes.add(".png");

        Iterator<File> files = FileUtils.iterateFiles(new File(
                "F:/test/"), (IOFileFilter) new SuffixFileFilter(
                suffixes), TrueFileFilter.INSTANCE);

        while (files.hasNext()) {
            File file = (File) files.next();
            PictureSearch.search(file);
        }

    }
}

The reader should return to me a buffered image with a height of 220 and a width of 200 (or a height of 205 and a width of 188 if it ignores the white margins around the image). But what he does is return an image of height 155 and width 174 to me, which is absurd because I’ve been checked three times, and frame 12 is height 220 and width 200. Am I doing everything right when reading frames?

Answer 1

, , 1. Gimp, .

: , . , , getMinIndex(); , , .

:

?

, BufferedImage, .

:

import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;

public class GifBounds {

    /** @see https://stackoverflow.com/questions/5688104 */
    public static void main(String[] args) throws IOException {
        search(new URL("http://i55.tinypic.com/263veb9.gif"));
    }
    public static void search(URL url) throws IOException {
        try {
            ImageReader reader = ImageIO.getImageReadersBySuffix("gif").next();
            reader.setInput(ImageIO.createImageInputStream(url.openStream()));
            int i = reader.getMinIndex();
            while (true) {
                BufferedImage bi = reader.read(i++);
                System.out.println(i
                    + ": " + bi.getWidth()
                    + ", " + bi.getHeight());
            }

        } catch (IndexOutOfBoundsException e) {
            // ignored
        }
    }
}

:

1: 200, 220
2: 79, 95
3: 77, 94
4: 78, 95
5: 79, 95
6: 77, 94
7: 78, 95
8: 79, 95
9: 77, 94
10: 180, 205
11: 97, 111
12: 173, 200
13: 174, 155
14: 174, 155
15: 174, 155
16: 174, 155
17: 174, 155
18: 174, 155
19: 174, 155
20: 167, 200
21: 97, 111

Answer 2

1

import java.net.URL;
import java.awt.Image;
import javax.imageio.ImageIO;

class GetGifSize {

    public static void main(String[] args) throws Exception {
        URL urlToImage = new URL("http://i55.tinypic.com/263veb9.gif");
        Image image = ImageIO.read(urlToImage);
        System.out.println( "Image size is " +
            image.getWidth(null) +
            "x" +
            image.getHeight(null) );
    }
}

Image size is 200x220

2

, trashgod.

import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;

public class GifBounds {

    /** @see http://stackoverflow.com/questions/5688104 */
    public static void main(String[] args) throws IOException {
        search(new URL("http://i55.tinypic.com/263veb9.gif"));
    }
    public static void search(URL url) throws IOException {
        ImageReader reader = ImageIO.getImageReadersBySuffix("gif").next();
        reader.setInput(ImageIO.createImageInputStream(url.openStream()));
        int i = reader.getMinIndex();
        int offset = i-0;
        int count = reader.getNumImages(true);
        System.out.println("Image count: " + count);
        for (int ii=i; ii<(count-i); ii++) {
            BufferedImage bi = reader.read(ii);
            System.out.println(ii
                + offset
                + ": " + bi.getWidth()
                + ", " + bi.getHeight());
        }
    }
}

---

, , trashgod .

. " ". " 9 ".