[英]How to make an exact copy of image in java?
加載圖像后,我想創建圖像的精確副本,從而使質量和比例保持不變。 使用我當前的代碼,質量降低了。
public class Image {
private static final String path = "C:/Users.../src/7horses.jpg";
private static final File file = new File(path);
static BufferedImage deepCopy(BufferedImage bi) throws IOException {
String saveAs = "copy.jpg";
ColorModel cm = bi.getColorModel();
boolean isAlphaPremultiplied = cm.isAlphaPremultiplied();
WritableRaster raster = bi.copyData(null);
BufferedImage cImg = new BufferedImage(cm, raster, isAlphaPremultiplied, null);
File saveImage = new File("C:/Users.../src", saveAs);
ImageIO.write(cImg, "jpg", saveImage);
return cImg;
}
public static void main(String[] args) throws IOException {
BufferedImage cp, img;
img = ImageIO.read(file);
cp = deepCopy(img);
}
}
嘗試只復制您的圖像文件,使用此代碼:
InputStream is = null;
OutputStream os = null;
try {
is = new FileInputStream(new File("path/to/img/src"));
os = new FileOutputStream(new File("path/to/img/dest"));
byte[] buffer = new byte[1024];
int length;
while ((length = is.read(buffer)) > 0) {
os.write(buffer, 0, length);
}
} finally {
is.close();
os.close();
}
如果您使用的是Java 8,則可以只調用Files.copy
方法,請在文檔中進行檢查
從使用:
ImageIO.write(cImg, "jpg", saveImage);
請執行以下操作:(這里沒有我的開發環境來對此進行測試,但請以為我對您有幫助。)
Iterator iterator = ImageIO.getImageWritersByFormatName("jpeg");
ImageWriter writer = (ImageWriter)iterator.next();
ImageWriteParam imageWriteParam = writer.getDefaultWriteParam();
imageWriteParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
imageWriteParam.setCompressionQuality(1); //0 is max Compression 1 is max quality
FileImageOutputStream output = new FileImageOutputStream(saveImage);
writer.setOutput(output);
IIOImage image = new IIOImage(cImg, null, null);
writer.write(null, image, iwp);
writer.dispose();
output.close();
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