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copied!<p>The rectangle in your example appears to be a frame representing the changed portion of the image sequence, starting from 1. Open the file in Gimp to see.</p> <p><img src="https://i.stack.imgur.com/LnVlG.png" alt="enter image description here"></p> <p>Addendum: It looks like a <a href="http://en.wikipedia.org/wiki/Graphics_Interchange_Format#Animated_GIF" rel="nofollow noreferrer">feature</a> intended to optimize rendering. At a guess, I'd say you could rely on the bounds of image number <code>getMinIndex()</code>; later frames appear to be subsumed in the first.</p> <p>Addendum:</p> <blockquote> <p>is there a way to get the full pixel data with the normal image and changes?</p> </blockquote> <p>Assuming known geometry, you should be able to combine the first image and any later one in a <code>BufferedImage</code>, as shown <a href="https://stackoverflow.com/questions/2658663">here</a>.</p> <p>Code:</p> <pre><code>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 } } } </code></pre> <p>Console:</p> <pre> 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 </pre>

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