java exif 旋转

编程入门行业动态更新时间:2024-10-21 03:35:46

java exif 旋转

Java获取照片EXIF信息

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

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android 拍照的照片方向问题，读取图片EXIF信息

exif图片方向处理

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翻转后 orientation 属性为6 。

public static void main(String[] args) throwsImageProcessingException, 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 intgetOrientation(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;

}returntag;

}

翻转：

packagecom.xxxx.xxx.xxx.xxx;import java.awt.*;importjava.awt.image.BufferedImage;/*** Created by Administrator on 2015/12/15.*/

public classRotateImage {public static BufferedImage Rotate(Image src, intangel) {int src_width = src.getWidth(null);int src_height = src.getHeight(null);//calculate the new image size

Rectangle rect_des = CalcRotatedSize(new Rectangle(newDimension(

src_width, src_height)), angel);

BufferedImage res= null;

res= newBufferedImage(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);returnres;

}public static Rectangle CalcRotatedSize(Rectangle src, intangel) {//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(newDimension(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

packagetestExif;importjava.awt.Graphics2D;importjava.awt.geom.AffineTransform;importjava.awt.image.BufferedImage;importjava.io.File;importjava.io.FileOutputStream;importjavax.imageio.ImageIO;importcom.drew.imaging.jpeg.JpegMetadataReader;importcom.drew.metadata.Directory;importcom.drew.metadata.Metadata;importcom.drew.metadata.exif.ExifDirectoryBase;;public classTestExif {public static void main(String[] args) throwsException {

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