Java以浮點精度創建BufferedImage

Question

我用Java創建了地圖編輯器。 問題是，我對每個字節值都有步驟，因此映射不平滑。 是否可以將BufferedImage柵格數據更改為浮動數據並在其上繪制浮動精度？

Answer 1

要回答您的問題，是的，您可以創建具有float精度的BufferedImage 。 但是，尚不清楚這是否可以幫助您解決問題。

無論如何，這是用於創建具有float精度的BufferedImage的工作示例代碼：

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);
    }
}

對於地圖高程數據，使用單個波段（ bands = 1; bandOffsets = {0}; ）和灰度顏色空間（ ColorSpace.CS_GRAY ），沒有透明度可能更有意義。