Created
September 6, 2015 09:58
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Rotate iage by reading exif information
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| private static void rotateJpg() { | |
| try { | |
| File imageFile = new File(inFilePath); | |
| BufferedImage originalImage = ImageIO.read(imageFile); | |
| // byte[] pixels = ((DataBufferByte) originalImage.getRaster().getDataBuffer()).getData(); | |
| System.out.println(isLandscape(originalImage)); | |
| Metadata metadata = ImageMetadataReader.readMetadata(imageFile); | |
| ExifIFD0Directory exifIFD0Directory = metadata.getFirstDirectoryOfType(ExifIFD0Directory.class); | |
| JpegDirectory jpegDirectory = (JpegDirectory) metadata.getFirstDirectoryOfType(JpegDirectory.class); | |
| Collection<Tag> tags = exifIFD0Directory.getTags(); | |
| for (Directory directory : metadata.getDirectories()) { | |
| for (Tag tag : directory.getTags()) { | |
| //System.out.println(tag); | |
| } | |
| } | |
| System.out.println(exifIFD0Directory.getInt(ExifIFD0Directory.TAG_ORIENTATION)); | |
| int orientation = exifIFD0Directory.getInt(ExifIFD0Directory.TAG_ORIENTATION); | |
| orientation = 6; | |
| //6 for totated counter-clockwise by one time | |
| // 3 for image rotated down to up : orientation = 3; | |
| // 8 for rotated clockwise by one time | |
| int width = jpegDirectory.getImageWidth(); | |
| int height = jpegDirectory.getImageHeight(); | |
| AffineTransform affineTransform = new AffineTransform(); | |
| switch (orientation) { | |
| case 1: | |
| break; | |
| case 2: // Flip X | |
| affineTransform.scale(-1.0, 1.0); | |
| affineTransform.translate(-width, 0); | |
| break; | |
| case 3: // PI rotation | |
| affineTransform.translate(width, height); | |
| affineTransform.rotate(Math.PI); | |
| break; | |
| case 4: // Flip Y | |
| affineTransform.scale(1.0, -1.0); | |
| affineTransform.translate(0, -height); | |
| break; | |
| case 5: // - PI/2 and Flip X | |
| affineTransform.rotate(-Math.PI / 2); | |
| affineTransform.scale(-1.0, 1.0); | |
| break; | |
| case 6: // -PI/2 and -width | |
| affineTransform.translate(height, 0); | |
| affineTransform.rotate(Math.PI / 2); | |
| break; | |
| case 7: // PI/2 and Flip | |
| affineTransform.scale(-1.0, 1.0); | |
| affineTransform.translate(-height, 0); | |
| affineTransform.translate(0, width); | |
| affineTransform.rotate(3 * Math.PI / 2); | |
| break; | |
| case 8: // PI / 2 | |
| affineTransform.translate(0, width); | |
| affineTransform.rotate(3 * Math.PI / 2); | |
| break; | |
| default: | |
| break; | |
| } | |
| AffineTransformOp affineTransformOp = new AffineTransformOp(affineTransform, AffineTransformOp.TYPE_BILINEAR); | |
| BufferedImage destinationImage = new BufferedImage(originalImage.getHeight(), originalImage.getWidth(), originalImage.getType()); | |
| destinationImage = affineTransformOp.filter(originalImage, destinationImage); | |
| ImageIO.write(destinationImage, "jpg", new File(outFilePath)); | |
| } catch (Exception exception) { | |
| exception.printStackTrace(); | |
| } | |
| } |
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