private RenderedOp createScaledImage(
RenderedImage sourceImage, S2Resolution resolution, int level) {
int sourceWidth = sourceImage.getWidth();
int sourceHeight = sourceImage.getHeight();
int targetWidth = imageLayouts[0].width >> level;
int targetHeight = imageLayouts[0].height >> level;
float scaleX = (float) targetWidth / (float) sourceWidth;
float scaleY = (float) targetHeight / (float) sourceHeight;
float corrFactorX = resolution == S2Resolution.R20M ? R20M_X_FACTOR : R60M_X_FACTOR;
float corrFactorY = resolution == S2Resolution.R20M ? R20M_Y_FACTOR : R60M_Y_FACTOR;
final Dimension tileDim = getTileDim(targetWidth, targetHeight);
ImageLayout imageLayout = new ImageLayout();
imageLayout.setTileWidth(tileDim.width);
imageLayout.setTileHeight(tileDim.height);
RenderingHints renderingHints =
new RenderingHints(
JAI.KEY_BORDER_EXTENDER, BorderExtender.createInstance(BorderExtender.BORDER_ZERO));
renderingHints.put(JAI.KEY_IMAGE_LAYOUT, imageLayout);
RenderedOp scaledImage =
ScaleDescriptor.create(
sourceImage,
scaleX * corrFactorX,
scaleY * corrFactorY,
0F,
0F,
Interpolation.getInstance(Interpolation.INTERP_NEAREST),
renderingHints);
if (scaledImage.getWidth() != targetWidth || scaledImage.getHeight() != targetHeight) {
return CropDescriptor.create(
scaledImage, 0.0F, 0.0F, (float) targetWidth, (float) targetHeight, null);
} else {
return scaledImage;
}
}
private static RenderedImage getSourceImage(ProductSubsetDef subsetDef, Band band) {
RenderedImage sourceImage = band.getSourceImage();
if (subsetDef != null) {
final Rectangle region = subsetDef.getRegion();
if (region != null) {
float x = region.x;
float y = region.y;
float width = region.width;
float height = region.height;
sourceImage = CropDescriptor.create(sourceImage, x, y, width, height, null);
}
final int subSamplingX = subsetDef.getSubSamplingX();
final int subSamplingY = subsetDef.getSubSamplingY();
if (mustSubSample(subSamplingX, subSamplingY) || mustTranslate(region)) {
float scaleX = 1.0f / subSamplingX;
float scaleY = 1.0f / subSamplingY;
float transX = region != null ? -region.x : 0;
float transY = region != null ? -region.y : 0;
Interpolation interpolation = Interpolation.getInstance(Interpolation.INTERP_NEAREST);
sourceImage =
ScaleDescriptor.create(
sourceImage, scaleX, scaleY, transX, transY, interpolation, null);
}
}
return sourceImage;
}
/**
* This method downscales a band by a given factor
*
* @param inputBand - the input band
* @param scalingFactor - the scaling factor
* @return Band - the downscaled band
*/
public static Band downscaleBand(Band inputBand, float scalingFactor) {
final RenderedImage sourceImage = inputBand.getSourceImage();
final RenderedOp downscaledImage =
ScaleDescriptor.create(
sourceImage,
1.0f / scalingFactor,
1.0f / scalingFactor,
0.0f,
0.0f,
Interpolation.getInstance(Interpolation.INTERP_NEAREST),
null);
Band downscaledBand =
new Band(
inputBand.getName(), inputBand.getDataType(),
downscaledImage.getWidth(), downscaledImage.getHeight());
downscaledBand.setSourceImage(downscaledImage);
return downscaledBand;
}
@Override
protected RenderedImage createImage(int level) {
RasterDataNode rdn = getRasterDataNode();
NetcdfFile lock = ctx.getNetcdfFile();
final Object object = ctx.getProperty(Constants.Y_FLIPPED_PROPERTY_NAME);
boolean isYFlipped = object instanceof Boolean && (Boolean) object;
int dataBufferType = ImageManager.getDataBufferType(rdn.getDataType());
int sourceWidth = (int) (rdn.getSceneRasterWidth() / scaleFactor);
int sourceHeight = (int) (rdn.getSceneRasterHeight() / scaleFactor);
ResolutionLevel resolutionLevel = ResolutionLevel.create(getModel(), level);
Dimension tileSize = getPreferredTileSize(rdn);
RenderedImage netcdfImg;
if (variable.getDataType() == DataType.LONG) {
if (rdn.getName().endsWith("_lsb")) {
netcdfImg =
NetcdfOpImage.createLsbImage(
variable,
imageOrigin,
isYFlipped,
lock,
dataBufferType,
sourceWidth,
sourceHeight,
tileSize,
resolutionLevel);
} else {
netcdfImg =
NetcdfOpImage.createMsbImage(
variable,
imageOrigin,
isYFlipped,
lock,
dataBufferType,
sourceWidth,
sourceHeight,
tileSize,
resolutionLevel);
}
} else {
netcdfImg =
new NetcdfOpImage(
variable,
imageOrigin,
isYFlipped,
lock,
dataBufferType,
sourceWidth,
sourceHeight,
tileSize,
resolutionLevel);
}
return ScaleDescriptor.create(
netcdfImg,
scaleFactor,
scaleFactor,
0.5f,
0.5f,
Interpolation.getInstance(Interpolation.INTERP_NEAREST),
null);
}
public static RenderedOp scaleImage(RenderedImage image, float scale) {
final Interpolation interpol = Interpolation.getInstance(Interpolation.INTERP_NEAREST);
return ScaleDescriptor.create(image, scale, scale, 0.0f, 0.0f, interpol, null);
}
