Java以浮点精度创建BufferedImage

Question

我用Java创建了地图编辑器。 问题是，我对每个字节值都有步骤，因此映射不平滑。 是否可以将BufferedImage栅格数据更改为浮动数据并在其上绘制浮动精度？

Answer 1

要回答您的问题，是的，您可以创建具有float精度的BufferedImage 。 但是，尚不清楚这是否可以帮助您解决问题。

无论如何，这是用于创建具有float精度的BufferedImage的工作示例代码：

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);
    }
}

对于地图高程数据，使用单个波段（ bands = 1; bandOffsets = {0}; ）和灰度颜色空间（ ColorSpace.CS_GRAY ），没有透明度可能更有意义。