Java 处理 iphone拍照后 图片EXIF属性翻转90度的方法
http://blog.csdn.net/z69183787/article/details/50320821
Java获取照片EXIF信息
http://blog.csdn.net/ghsau/article/details/8472486
java解决手机等移动设备中照片上传至服务器方向不正确的问题
http://www.bubuko.com/infodetail-715634.html
android 拍照的照片方向问题，读取图片EXIF信息
http://blog.csdn.net/yx0628/article/details/9429795
exif图片方向处理
http://www.codes51.com/article/detail_625107.html
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翻转后 orientation 属性为6 。
public static void main(String[] args) throws ImageProcessingException, IOException { File jpegFile= new File("C:\\Users\\Administrator\\Desktop\\IMG_0362.JPG"); Metadata metadata = ImageMetadataReader.readMetadata(jpegFile); Directory directory = metadata.getDirectory(ExifIFD0Directory.class); JpegDirectory jpegDirectory = (JpegDirectory)metadata.getDirectory(JpegDirectory.class); // int orientation =0; // Metadata metadata = JpegMetadataReader.readMetadata(newFile); // for (Directory directory : metadata.getDirectories()) // { // for (Tag tag : directory.getTags()) // { // if ("Orientation".equalsIgnoreCase(tag.getTagName())) // { // orientation=getOrientation(tag.getDescription()); // } // } // } // Integer turn=360; // if(orientation==0||orientation==1) // { // turn=360; // } // else if(orientation==3) // { // turn=180; // } // else if(orientation==6) // { // turn=90; // } // else if(orientation==8) // { // turn=270; // } int orientation = 1; try { orientation = directory.getInt(ExifIFD0Directory.TAG_ORIENTATION); } catch (MetadataException me) { logger.warn("Could not get orientation"); } System.out.println(orientation); BufferedImage src = ImageIO.read(jpegFile); BufferedImage des = RotateImage.Rotate(src, 90); ImageIO.write(des,"jpg", new File("C:\\Users\\Administrator\\Desktop\\IMG_0362.JPG")); // FileInputStream fip = new FileInputStream(jpegFile); // LLJTran llj = new LLJTran(fip); // try { // llj.read(LLJTran.READ_INFO, true); // } catch (LLJTranException e) { // e.printStackTrace(); // } // // Exif exif = (Exif) llj.getImageInfo(); // Entry e = new Entry(Exif.RATIONAL); // exif.setTagValue(Exif.ORIENTATION_TOPLEFT,1,e,true); // llj.refreshAppx(); // Recreate Marker Data for changes done // //改写后的文件，文件必须存在 // OutputStream out = new BufferedOutputStream(new FileOutputStream("C:\\Users\\Administrator\\Desktop\\IMG_0362.JPG")); // // Transfer remaining of image to output with new header. // try { // llj.xferInfo(null, out, LLJTran.REPLACE, LLJTran.REPLACE); // } catch (LLJTranException e1) { // e1.printStackTrace(); // } // fip.close(); // out.close(); // llj.freeMemory(); } public static int getOrientation(String orientation) { int tag = 0; if ("Top, left side (Horizontal / normal)".equalsIgnoreCase(orientation)) { tag = 1; } else if ("Top, right side (Mirror horizontal)".equalsIgnoreCase(orientation)) { tag = 2; } else if ("Bottom, right side (Rotate 180)".equalsIgnoreCase(orientation)) { tag = 3; } else if ("Bottom, left side (Mirror vertical)".equalsIgnoreCase(orientation)) { tag = 4; } else if ("Left side, top (Mirror horizontal and rotate 270 CW)".equalsIgnoreCase(orientation)) { tag = 5; } else if ("Right side, top (Rotate 90 CW)".equalsIgnoreCase(orientation)) { tag = 6; } else if ("Right side, bottom (Mirror horizontal and rotate 90 CW)".equalsIgnoreCase(orientation)) { tag = 7; } else if ("Left side, bottom (Rotate 270 CW)".equalsIgnoreCase(orientation)) { tag = 8; } return tag; }
翻转：
package com.xxxx.xxx.xxx.xxx; import java.awt.*; import java.awt.image.BufferedImage; /** * Created by Administrator on 2015/12/15. */ public class RotateImage { public static BufferedImage Rotate(Image src, int angel) { int src_width = src.getWidth(null); int src_height = src.getHeight(null); // calculate the new image size Rectangle rect_des = CalcRotatedSize(new Rectangle(new Dimension( src_width, src_height)), angel); BufferedImage res = null; res = new BufferedImage(rect_des.width, rect_des.height, BufferedImage.TYPE_INT_RGB); Graphics2D g2 = res.createGraphics(); // transform g2.translate((rect_des.width - src_width) / 2, (rect_des.height - src_height) / 2); g2.rotate(Math.toRadians(angel), src_width / 2, src_height / 2); g2.drawImage(src, null, null); return res; } public static Rectangle CalcRotatedSize(Rectangle src, int angel) { // if angel is greater than 90 degree, we need to do some conversion if (angel >= 90) { if(angel / 90 % 2 == 1){ int temp = src.height; src.height = src.width; src.width = temp; } angel = angel % 90; } double r = Math.sqrt(src.height * src.height + src.width * src.width) / 2; double len = 2 * Math.sin(Math.toRadians(angel) / 2) * r; double angel_alpha = (Math.PI - Math.toRadians(angel)) / 2; double angel_dalta_width = Math.atan((double) src.height / src.width); double angel_dalta_height = Math.atan((double) src.width / src.height); int len_dalta_width = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_width)); int len_dalta_height = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_height)); int des_width = src.width + len_dalta_width * 2; int des_height = src.height + len_dalta_height * 2; return new Rectangle(new Dimension(des_width, des_height)); } }
上述api接口有了变化，已经不能使用，请参考下面的代码
package testExif; import java.awt.Graphics2D; import java.awt.geom.AffineTransform; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileOutputStream; import javax.imageio.ImageIO; import com.drew.imaging.jpeg.JpegMetadataReader; import com.drew.metadata.Directory; import com.drew.metadata.Metadata; import com.drew.metadata.exif.ExifDirectoryBase;; public class TestExif { public static void main(String[] args) throws Exception { File file = new File("/pathToJepg/d3805d6c032a42feabce3deee74dfb6a.JPG"); Metadata metadata = JpegMetadataReader.readMetadata(file); Directory directory = metadata.getFirstDirectoryOfType(ExifDirectoryBase.class); int orientation=0; if(directory != null && directory.containsTag(ExifDirectoryBase.TAG_ORIENTATION)){ // Exif信息中有保存方向,把信息复制到缩略图 orientation = directory.getInt(ExifDirectoryBase.TAG_ORIENTATION); // 原图片的方向信息 System.out.println(orientation); } if(orientation == 1){ System.out.println("rotate 90"); BufferedImage src = ImageIO.read(file); BufferedImage des = RotateImage.Rotate(src, 270); ImageIO.write(des,"jpg", new File("D:/upload/20170224/raw/90.jpg")); } } }
图片方向判定
if(6 == orientation ){ //6旋转90 angle = 90; }else if( 3 == orientation){ //3旋转180 angle = 180; }else if( 8 == orientation){ //8旋转90 angle = 270; }
总结
上面的RotateImage类可以工作，已经测试了几组照片
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补充:
我们都遇到过这样的情况，拍摄高的景物时，会把相机竖着拍，但是这样得到的图片如果用普通的图片浏览器看景物就是躺着的，需要调整一个角度。
用手机拍照实验(用普通浏览器来看)：
横拿手机右手拍照，照片方向"1""Horizontal"。
正常拿手机竖拍，照片方向"6""Rotate 90 CW"，图片顺时针旋转90度时，即正常。
再转90度，横拿，左手拍照，照片方向"3""Rotate 180",旋转180度即可正常显示方向。
再转90度，手机头朝下拍，照片方向"8""Rotate 270 CW"。
取到这些值，就可以进行相应的操作了。
