Java 从字节矩阵创建一组图像文件
正如我在标题中所写,我想了解如何从包含字节的数组中创建一些图像。这就是迄今为止所写的Java 从字节矩阵创建一组图像文件,java,image,file,bufferedimage,imagej,Java,Image,File,Bufferedimage,Imagej,正如我在标题中所写,我想了解如何从包含字节的数组中创建一些图像。这就是迄今为止所写的 BufferedImage arrayImage[] = new BufferedImage [depthV]; int arrayIndex = 0; for (int z = 0; z < depthV; z++) { byte byteToImg[] = new byte [widthV*heightV];
BufferedImage arrayImage[] = new BufferedImage [depthV];
int arrayIndex = 0;
for (int z = 0; z < depthV; z++)
{
byte byteToImg[] = new byte [widthV*heightV];
for (int x = 0; x < widthV; x++)
{
for (int y = 0; y < heightV; y++)
{
byteToImg[x + y] = data3D[0][z][y][x];
}
}
ByteArrayInputStream byteIn = new ByteArrayInputStream(byteToImg);
BufferedImage finalImage= null;
try {
finalImage = ImageIO.read(byteIn);
} catch (IOException e) {
e.printStackTrace();
}
arrayImage[arrayIndex]=finalImage;
arrayIndex++;
}
for (int i = 0; i < arrayImage.length; i++)
{
File outputfile = new File("./Resources/tmp/image"+i+".jpg");
try {
ImageIO.write(arrayImage[i], "jpg", outputfile);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
BufferedImage arrayImage[]=新的BufferedImage[depthV];
int-arrayIndex=0;
对于(intz=0;z
Java函数以Java.lang.IllegalArgumentException结束:image==null!
我的错误是什么?我怎样才能避免这个问题?有更好的方法吗?您不能执行
ImageIO。读取以从字节数组创建图像。
有效的方法是:
public class ByteRasterImage extends BufferedImage {
private static final ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
private static int[] nBits = {8};
private static final ColorModel colorModel = new ComponentColorModel(cs, nBits, false, false,
Transparency.OPAQUE,
DataBuffer.TYPE_BYTE);
private static WritableRaster createWritableRaster(byte[] bytes, final int w, final int h) {
final DataBufferByte db = new DataBufferByte(new byte[][] {bytes}, bytes.length);
final ComponentSampleModel sm = new ComponentSampleModel(DataBuffer.TYPE_BYTE, w, h, 1, w, new int[] {0});
return Raster.createWritableRaster(sm, db, new Point(0, 0));
}
private ByteRasterImage (WritableRaster raster) {
super (colorModel, raster, false, null);
}
/**
* Create a ByteRasterImage from the given data
* @param bytes the data content to wrap into an image, size w * h
* @param w the width of the image
* @param h the height of the image
*/
public ByteRasterImage (byte[] bytes, int w, int h) {
this(createWritableRaster(bytes, w, h));
}
}
与捆绑的库可以轻松做到这一点:
import io.scif.gui.AWTImageTools;
...
byte[] bytes = new byte[width * height];
...
boolean signed = false;
BufferedImage bi = AWTImageTools.makeImage(bytes, width, height, signed);
该方法的源代码是(which调用,which调用)
但实际上,如果您使用SCIFIO和/或ImageJ,则根本不需要使用BufferedImage
。有关如何写出图像平面的示例,请参见
SCIFIO可从以下网址获得:。相关的pom.xml
代码片段包括:
<repositories>
<repository>
<id>imagej.public</id>
<url>http://maven.imagej.net/content/groups/public</url>
</repository>
</repositories>
...
<dependency>
<groupId>io.scif</groupId>
<artifactId>scifio</artifactId>
<version>0.22.0</version>
</dependency>
图像J.公共
http://maven.imagej.net/content/groups/public
...
io.scif
西菲奥
0.22.0
请发布完整的例外情况。这里特别重要的是抛出异常的行。我不能发布所有异常,它太长了。有一行感兴趣的代码:ImageIO.write(arrayImage[i],“jpg”,outputfile);正如您所说,我已经编辑了代码,这是一个新的代码片段:ByteRasterImage finalImage=newbyterasterimage(byteToImg,widthV,heightV);arrayImage[arrayIndex]=最终图像;arrayIndex++;}对于(inti=0;ibyteToImg[x+y]=data3D[0][z][y][x]中的索引错误代码>:必须将y
与图像的宽度相乘。