從1d陣列構建圖像

Question

我有一個包含512x512灰度圖像的像素值的1維數組像素。我想寫入一個PNG文件。我寫了下面的代碼，但它只是創建一個空白圖像。

public void write(int width ,int height, int[] pixel) { 

     try { 
// retrieve image 
BufferedImage writeImage = new BufferedImage(512,512,BufferedImage.TYPE_BYTE_GRAY); 
File outputfile = new File("saved.png"); 
WritableRaster raster = (WritableRaster) writeImage.getData(); 
raster.setPixels(0,0,width,height,pixel); 

ImageIO.write(writeImage, "png", outputfile); 

} catch (IOException e) { 

} 

Answer 1

返回的Raster是如果圖像改變時它不會更新的圖像數據的副本。

嘗試將新的柵格對象設置回圖像。

WritableRaster raster = (WritableRaster)writeImage.getData(); 
raster.setPixels(0, 0, width, height, pixel); 
writeImage.setData(raster);