本文整理了Java中it.geosolutions.jaiext.colorindexer.Quantizer.<init>方法的一些代码示例，展示了Quantizer.<init>的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Quantizer.<init>方法的具体详情如下：
包路径：it.geosolutions.jaiext.colorindexer.Quantizer
类名称：Quantizer
方法名：<init>

Quantizer.<init>介绍

暂无

代码示例

代码示例来源：origin: geosolutions-it/jai-ext

@Test
public void testCompletelyTransparentImage() {
  BufferedImage image = new BufferedImage(20, 20, BufferedImage.TYPE_INT_ARGB);
  Graphics g = image.getGraphics();
  g.setColor(new Color(20, 20, 20, 0));
  g.fillRect(0, 0, 20, 20);
  g.dispose();
  Quantizer q = new Quantizer(2);
  ColorIndexer indexer = q.buildColorIndexer(image);
  assertTrue(indexer.toIndexColorModel().getTransparentPixel() != -1);
}

代码示例来源：origin: geosolutions-it/jai-ext

@Test
public void testAlphaZeroNoRemoval() {
  BufferedImage image = new BufferedImage(40, 40, BufferedImage.TYPE_INT_ARGB);
  Graphics g = image.getGraphics();
  g.setColor(Color.WHITE);
  g.fillRect(0, 0, 20, 20);
  g.setColor(new Color(20, 20, 20, 20)); // A dark gray
  g.fillRect(20, 20, 20, 20);
  g.setColor(new Color(200, 200, 200, 20)); // A light gray
  g.fillRect(0, 20, 20, 20);
  g.setColor(new Color(254, 254, 254, 20)); // A light gray
  g.fillRect(0, 20, 20, 20);
  g.setColor(new Color(1, 1, 1, 0)); // transparent
  g.fillRect(20, 0, 20, 20);
  g.dispose();
  Quantizer q = new Quantizer(2);
  ColorIndexer indexer = q.buildColorIndexer(image);
  assertTrue(indexer.toIndexColorModel().getTransparentPixel() != -1);
}

代码示例来源：origin: geosolutions-it/jai-ext

private RenderedImage quantize(RenderedImage image, ROI roi, Range nodata, int destNoData) {
  Quantizer q = new Quantizer(256);
  ColorIndexer indexer = q.buildColorIndexer(image);
  RenderedImage indexed = ColorIndexerDescriptor.create(image, indexer, roi, nodata,
      destNoData, null);
  checkNoDataROI(indexed, image, roi, nodata, destNoData);
  return indexed;
}

代码示例来源：origin: GeoWebCache/geowebcache

private static RenderedImage applyPalette(RenderedImage canvas) {
    if (!(canvas.getColorModel() instanceof IndexColorModel)) {
      // try to force a RGBA setup
      ImageWorker imageWorker = new ImageWorker(canvas);
      RenderedImage image =
          imageWorker.rescaleToBytes().forceComponentColorModel().getRenderedImage();
      ColorIndexer indexer = new Quantizer(256).subsample().buildColorIndexer(image);

      // if we have an indexer transform the image
      if (indexer != null) {
        image = new ImageWorker(image).colorIndex(indexer).getRenderedImage();
      }
      return image;
    }
    return canvas;
  }
}

代码示例来源：origin: org.geoserver/gs-wms

} else if (palettedFormatName.equalsIgnoreCase(format)) {
  indexer = new Quantizer(256).subsample().buildColorIndexer(image);

代码示例来源：origin: GeoWebCache/geowebcache

/**
   * Quantize if the source did not do so already
   *
   * @param canvas
   * @return
   */
  @Override
  public RenderedImage preprocess(RenderedImage canvas) {
    if (!(canvas.getColorModel() instanceof IndexColorModel)) {
      if (canvas.getColorModel() instanceof ComponentColorModel
          && canvas.getSampleModel().getDataType() == DataBuffer.TYPE_BYTE) {
        ColorIndexer indexer =
            new Quantizer(256).subsample().buildColorIndexer(canvas);
        if (indexer != null) {
          ParameterBlock pb = new ParameterBlock();
          pb.setSource(canvas, 0); // The source image.
          pb.set(indexer, 0);
          canvas =
              JAI.create(
                  "ColorIndexer",
                  pb,
                  JAI.getDefaultInstance().getRenderingHints());
        }
      }
    }
    return canvas;
  }
};