//大部分情况都转换没问题，有极个别的转换不成功。现在想，是不是调用convert.exe 更方便 呵呵
private static boolean isCMYK(String filename) {
boolean result = false;
BufferedImage img = null;
try {
img = ImageIO.read(new File(filename));
} catch (IOException e) {
System.out.println(e.getMessage() + ": " + filename);
try {
//把这个文件拷贝出来
FileUtils.copyFile(new File(filename), new File("/var/ftp/" + FilenameUtils.getName(filename)));
} catch (IOException ex) {
java.util.logging.Logger.getLogger(CMYK2RGB.class.getName()).log(Level.SEVERE, null, ex);
}
}
if (img != null) {
int colorSpaceType = img.getColorModel().getColorSpace().getType();
result = colorSpaceType == ColorSpace.TYPE_CMYK;
}
return result;
}
// extract metadata
public static BufferedImage readImage(File file) throws IOException {
// Get an ImageReader.
try {
ImageInputStream input = ImageIO.createImageInputStream(file);
Iterator readers = ImageIO.getImageReaders(input);
if (readers == null || !readers.hasNext()) {
return null;
}
ImageReader reader = (ImageReader) readers.next();
reader.setInput(input);
String format = reader.getFormatName();
if ("JPEG".equalsIgnoreCase(format) || "JPG".equalsIgnoreCase(format)) {
try {
IIOMetadata metadata = reader.getImageMetadata(0);
String metadataFormat = metadata.getNativeMetadataFormatName();
IIOMetadataNode iioNode = (IIOMetadataNode) metadata.getAsTree(metadataFormat);
NodeList children = iioNode.getElementsByTagName("app14Adobe");
if (children.getLength() > 0) {
try {
iioNode = (IIOMetadataNode) children.item(0);
int transform = Integer.parseInt(iioNode.getAttribute("transform"));
Raster raster = reader.readRaster(0, reader.getDefaultReadParam());
if (input != null) {
input.close();
}
reader.dispose();
return createJPEG4(raster, transform);
} catch (Exception e) {
// TODO Auto-generated catch block
log.error(e);
}
}
} catch (Exception e) {
// TODO Auto-generated catch block
log.error(e);
// LogWriter.log(file.getPath());
}
}
} catch (NumberFormatException e) {
// TODO Auto-generated catch block
return null;
}
return null;
}
/**
*
* Java's ImageIO can't process 4-component images
*
* and Java2D can't apply AffineTransformOp either,
*
* so convert raster data to RGB.
*
* Technique due to MArk Stephens.
*
* Free for any use.
*
*/
private static BufferedImage createJPEG4(Raster raster, int xform) {
try {
int w = raster.getWidth();
int h = raster.getHeight();
byte[] rgb = new byte[w * h * 3];
// if (Adobe_APP14 and transform==2) then YCCK else
// CMYK
if (xform == 2) { // YCCK --
// Adobe
float[] Y = raster.getSamples(0, 0, w, h, 0, (float[]) null);
float[] Cb = raster.getSamples(0, 0, w, h, 1, (float[]) null);
float[] Cr = raster.getSamples(0, 0, w, h, 2, (float[]) null);
float[] K = raster.getSamples(0, 0, w, h, 3, (float[]) null);
for (int i = 0, imax = Y.length, base = 0; i < imax; i++, base += 3) {
float k = 220 - K[i], y = 255 - Y[i], cb = 255 - Cb[i], cr = 255 - Cr[i];
double val = y + 1.402 * (cr - 128) - k;
val = (val - 128) * .65f + 128;
rgb[base] = val < 0.0 ? (byte) 0
: val > 255.0 ? (byte) 0xff : (byte) (val + 0.5);
val = y - 0.34414 * (cb - 128) - 0.71414 * (cr - 128) - k;
val = (val - 128) * .65f + 128;
rgb[base + 1] = val < 0.0 ? (byte) 0
: val > 255.0 ? (byte) 0xff : (byte) (val + 0.5);
val = y + 1.772 * (cb - 128) - k;
val = (val - 128) * .65f + 128;
rgb[base + 2] = val < 0.0 ? (byte) 0
: val > 255.0 ? (byte) 0xff : (byte) (val + 0.5);
}
} else {
// assert xform==0: xform;
// CMYK
int[] C = raster.getSamples(0, 0, w, h, 0, (int[]) null);
int[] M = raster.getSamples(0, 0, w, h, 1, (int[]) null);
int[] Y = raster.getSamples(0, 0, w, h, 2, (int[]) null);
int[] K = raster.getSamples(0, 0, w, h, 3, (int[]) null);
for (int i = 0, imax = C.length, base = 0; i < imax; i++, base += 3) {
int c = 255 - C[i];
int m = 255 - M[i];
int y = 255 - Y[i];
int k = 255 - K[i];
float kk = k / 255f;
rgb[base] = (byte) (255 - Math.min(255f, c * kk + k));
rgb[base + 1] = (byte) (255 - Math.min(255f, m * kk + k));
rgb[base + 2] = (byte) (255 - Math.min(255f, y * kk + k));
}
}
// from other image types we know InterleavedRaster's can be
// manipulated by AffineTransformOp, so create one of those.
raster = Raster.createInterleavedRaster(new DataBufferByte(rgb,
rgb.length), w, h, w * 3, 3, new int[]{0, 1, 2}, null);
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
ColorModel cm = new ComponentColorModel(cs, false, true,
Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
return new BufferedImage(cm, (WritableRaster) raster, true, null);
} catch (Exception e) {
// TODO Auto-generated catch block
log.error(e);
return null;
}
}
