Java使用浮點精度創建BufferedImage

Question

我使用Java創建了一個地圖編輯器。問題是，我對每個字節值都有步驟，所以地圖不平滑。是否可以將BufferedImage柵格數據更改爲浮點數據並在其上繪製浮點精度？

Answer 1

要回答你的問題，是的，你可以創建一個浮點精度的BufferedImage。然而，這是否會幫助你解決你的問題還有點不清楚。

在任何情況下，這裏的工作實施例中的代碼，用於創建一個BufferedImage與float精度：

public class FloatImage { 
    public static void main(String[] args) { 
     // Define dimensions and layout of the image 
     int w = 300; 
     int h = 200; 
     int bands = 4; // 4 bands for ARGB, 3 for RGB etc 
     int[] bandOffsets = {0, 1, 2, 3}; // length == bands, 0 == R, 1 == G, 2 == B and 3 == A 

     // Create a TYPE_FLOAT sample model (specifying how the pixels are stored) 
     SampleModel sampleModel = new PixelInterleavedSampleModel(DataBuffer.TYPE_FLOAT, w, h, bands, w * bands, bandOffsets); 
     // ...and data buffer (where the pixels are stored) 
     DataBuffer buffer = new DataBufferFloat(w * h * bands); 

     // Wrap it in a writable raster 
     WritableRaster raster = Raster.createWritableRaster(sampleModel, buffer, null); 

     // Create a color model compatible with this sample model/raster (TYPE_FLOAT) 
     // Note that the number of bands must equal the number of color components in the 
     // color space (3 for RGB) + 1 extra band if the color model contains alpha 
     ColorSpace colorSpace = ColorSpace.getInstance(ColorSpace.CS_sRGB); 
     ColorModel colorModel = new ComponentColorModel(colorSpace, true, false, Transparency.TRANSLUCENT, DataBuffer.TYPE_FLOAT); 

     // And finally create an image with this raster 
     BufferedImage image = new BufferedImage(colorModel, raster, colorModel.isAlphaPremultiplied(), null); 

     System.out.println("image = " + image); 
    } 
} 

對於圖高程數據，採用了單一的條帶（bands = 1; bandOffsets = {0};）和灰度顏色空間（ColorSpace.CS_GRAY）和沒有透明可能會更有意義。