List of usage examples for javax.imageio ImageReadParam getSourceRegion
public Rectangle getSourceRegion()
From source file:ch5ImageReader.java
/** * read in the input image specified by index imageIndex using the * parameters specified by the ImageReadParam object param *//*w w w.j av a 2 s. c o m*/ public BufferedImage read(int imageIndex, ImageReadParam param) { checkIndex(imageIndex); if (isSeekForwardOnly()) minIndex = imageIndex; else minIndex = 0; BufferedImage bimage = null; WritableRaster raster = null; /* * this method sets the image metadata so that we can use the getWidth * and getHeight methods */ setImageMetadata(iis, imageIndex); int srcWidth = getWidth(imageIndex); int srcHeight = getHeight(imageIndex); // initialize values to -1 int dstWidth = -1; int dstHeight = -1; int srcRegionWidth = -1; int srcRegionHeight = -1; int srcRegionXOffset = -1; int srcRegionYOffset = -1; int xSubsamplingFactor = -1; int ySubsamplingFactor = -1; if (param == null) param = getDefaultReadParam(); Iterator imageTypes = getImageTypes(imageIndex); try { /* * get the destination BufferedImage which will be filled using the * input image's pixel data */ bimage = getDestination(param, imageTypes, srcWidth, srcHeight); /* * get Rectangle object which will be used to clip the source * image's dimensions. */ Rectangle srcRegion = param.getSourceRegion(); if (srcRegion != null) { srcRegionWidth = (int) srcRegion.getWidth(); srcRegionHeight = (int) srcRegion.getHeight(); srcRegionXOffset = (int) srcRegion.getX(); srcRegionYOffset = (int) srcRegion.getY(); /* * correct for overextended source regions */ if (srcRegionXOffset + srcRegionWidth > srcWidth) dstWidth = srcWidth - srcRegionXOffset; else dstWidth = srcRegionWidth; if (srcRegionYOffset + srcRegionHeight > srcHeight) dstHeight = srcHeight - srcRegionYOffset; else dstHeight = srcRegionHeight; } else { dstWidth = srcWidth; dstHeight = srcHeight; srcRegionXOffset = srcRegionYOffset = 0; } /* * get subsampling factors */ xSubsamplingFactor = param.getSourceXSubsampling(); ySubsamplingFactor = param.getSourceYSubsampling(); /** * dstWidth and dstHeight should be equal to bimage.getWidth() and * bimage.getHeight() after these next two instructions */ dstWidth = (dstWidth - 1) / xSubsamplingFactor + 1; dstHeight = (dstHeight - 1) / ySubsamplingFactor + 1; } catch (IIOException e) { System.err.println("Can't create destination BufferedImage"); } raster = bimage.getWritableTile(0, 0); /* * using the parameters specified by the ImageReadParam object, read the * image image data into the destination BufferedImage */ byte[] srcBuffer = new byte[srcWidth]; byte[] dstBuffer = new byte[dstWidth]; int jj; int index; try { for (int j = 0; j < srcHeight; j++) { iis.readFully(srcBuffer, 0, srcWidth); jj = j - srcRegionYOffset; if (jj % ySubsamplingFactor == 0) { jj /= ySubsamplingFactor; if ((jj >= 0) && (jj < dstHeight)) { for (int i = 0; i < dstWidth; i++) { index = srcRegionXOffset + i * xSubsamplingFactor; dstBuffer[i] = srcBuffer[index]; } raster.setDataElements(0, jj, dstWidth, 1, dstBuffer); } } } } catch (IOException e) { bimage = null; } return bimage; }
From source file:org.geotools.coverage.io.util.Utilities.java
/** * This method creates the GridCoverage2D from the underlying file given a specified envelope, and a requested dimension. * // w w w .j ava2 s .c o m * @param imageIndex * @param coordinateReferenceSystem * @param generalEnvelope * @param mathTransform * * @param iUseJAI specify if the underlying read process should leverage on a JAI ImageRead operation or a simple direct call to the {@code read} * method of a proper {@code ImageReader}. * @param useMultithreading specify if the underlying read process should use multithreading when a JAI ImageRead operation is requested * @param overviewPolicy the overview policy which need to be adopted * @return a {@code GridCoverage} * * @throws java.io.IOException */ public static GridCoverage createCoverage(ImageReaderSpi spi, Object input, final int imageIndex, ImageReadParam imageReadParam, final boolean useJAI, final boolean useMultithreading, final boolean newTransform, final GridSampleDimension[] sampleDimensions, final String coverageName, GridCoverageFactory coverageFactory, MathTransform raster2Model, CoordinateReferenceSystem coordinateReferenceSystem, GeneralEnvelope coverageEnvelope2D) throws IOException { // //////////////////////////////////////////////////////////////////// // // Doing an image read for reading the coverage. // // //////////////////////////////////////////////////////////////////// final PlanarImage image = readImage(spi, input, imageIndex, useJAI, imageReadParam, useMultithreading); // ///////////////////////////////////////////////////////////////////// // // Creating the coverage // // ///////////////////////////////////////////////////////////////////// if (newTransform) { // I need to calculate a new transformation (raster2Model) // between the cropped image and the required envelope final int ssWidth = image.getWidth(); final int ssHeight = image.getHeight(); // // // // setting new coefficients to define a new affineTransformation // to be applied to the grid to world transformation // ------------------------------------------------------ // // With respect to the original envelope, the obtained // planarImage needs to be rescaled and translated. The scaling // factors are computed as the ratio between the cropped source // region sizes and the read image sizes. The translate // settings are represented by the offsets of the source region. // // // final Rectangle sourceRegion = imageReadParam.getSourceRegion(); final double scaleX = sourceRegion.width / (1.0 * ssWidth); final double scaleY = sourceRegion.height / (1.0 * ssHeight); final double translateX = sourceRegion.x; final double translateY = sourceRegion.y; return Utilities.createCoverageFromImage(coverageFactory, coverageName, imageIndex, image, ConcatenatedTransform.create( ProjectiveTransform .create(new AffineTransform(scaleX, 0, 0, scaleY, translateX, translateY)), raster2Model), coordinateReferenceSystem, (GeneralEnvelope) null, sampleDimensions, true); } else { // In case of no transformation is required (As an instance, // when reading the whole image) return Utilities.createCoverageFromImage(coverageFactory, coverageName, imageIndex, image, (MathTransform) null, (CoordinateReferenceSystem) null, coverageEnvelope2D, sampleDimensions, true); } }
From source file:org.geotools.gce.imagecollection.Utils.java
/** * Checks that the provided <code>dimensions</code> when intersected with * the source region used by the provided {@link ImageReadParam} instance * does not result in an empty {@link Rectangle}. * /* w ww .j a v a2 s. c o m*/ * <p> * Input parameters cannot be null. * * @param readParameters * an instance of {@link ImageReadParam} for which we want to * check the source region element. * @param dimensions * an instance of {@link Rectangle} to use for the check. * @return <code>true</code> if the intersection is not empty, * <code>false</code> otherwise. */ static boolean checkEmptySourceRegion(final ImageReadParam readParameters, final Rectangle dimensions) { Utilities.ensureNonNull("readDimension", dimensions); Utilities.ensureNonNull("readP", readParameters); final Rectangle sourceRegion = readParameters.getSourceRegion(); Rectangle.intersect(sourceRegion, dimensions, sourceRegion); if (sourceRegion.isEmpty()) return true; readParameters.setSourceRegion(sourceRegion); return false; }
From source file:org.geotools.gce.imagemosaic.GranuleDescriptor.java
/** * Load a specified a raster as a portion of the granule describe by this {@link GranuleDescriptor}. * * @param imageReadParameters the {@link ImageReadParam} to use for reading. * @param index the index to use for the {@link ImageReader}. * @param cropBBox the bbox to use for cropping. * @param mosaicWorldToGrid the cropping grid to world transform. * @param request the incoming request to satisfy. * @param hints {@link Hints} to be used for creating this raster. * @return a specified a raster as a portion of the granule describe by this {@link GranuleDescriptor}. * @throws IOException in case an error occurs. *//* w w w. jav a2s .c om*/ public GranuleLoadingResult loadRaster(final ImageReadParam imageReadParameters, final int index, final ReferencedEnvelope cropBBox, final MathTransform2D mosaicWorldToGrid, final RasterLayerRequest request, final Hints hints) throws IOException { if (LOGGER.isLoggable(java.util.logging.Level.FINER)) { final String name = Thread.currentThread().getName(); LOGGER.finer("Thread:" + name + " Loading raster data for granuleDescriptor " + this.toString()); } ImageReadParam readParameters = null; int imageIndex; final boolean useFootprint = roiProvider != null && request.getFootprintBehavior() != FootprintBehavior.None; Geometry inclusionGeometry = useFootprint ? roiProvider.getFootprint() : null; final ReferencedEnvelope bbox = useFootprint ? new ReferencedEnvelope(granuleBBOX.intersection(inclusionGeometry.getEnvelopeInternal()), granuleBBOX.getCoordinateReferenceSystem()) : granuleBBOX; boolean doFiltering = false; if (filterMe && useFootprint) { doFiltering = Utils.areaIsDifferent(inclusionGeometry, baseGridToWorld, granuleBBOX); } // intersection of this tile bound with the current crop bbox final ReferencedEnvelope intersection = new ReferencedEnvelope(bbox.intersection(cropBBox), cropBBox.getCoordinateReferenceSystem()); if (intersection.isEmpty()) { if (LOGGER.isLoggable(java.util.logging.Level.FINE)) { LOGGER.fine(new StringBuilder("Got empty intersection for granule ").append(this.toString()) .append(" with request ").append(request.toString()) .append(" Resulting in no granule loaded: Empty result").toString()); } return null; } // check if the requested bbox intersects or overlaps the requested area if (useFootprint && inclusionGeometry != null && !JTS.toGeometry(cropBBox).intersects(inclusionGeometry)) { if (LOGGER.isLoggable(java.util.logging.Level.FINE)) { LOGGER.fine(new StringBuilder("Got empty intersection for granule ").append(this.toString()) .append(" with request ").append(request.toString()) .append(" Resulting in no granule loaded: Empty result").toString()); } return null; } ImageInputStream inStream = null; ImageReader reader = null; try { // //get info about the raster we have to read // // get a stream assert cachedStreamSPI != null : "no cachedStreamSPI available!"; inStream = cachedStreamSPI.createInputStreamInstance(granuleUrl, ImageIO.getUseCache(), ImageIO.getCacheDirectory()); if (inStream == null) return null; // get a reader and try to cache the relevant SPI if (cachedReaderSPI == null) { reader = ImageIOExt.getImageioReader(inStream); if (reader != null) cachedReaderSPI = reader.getOriginatingProvider(); } else reader = cachedReaderSPI.createReaderInstance(); if (reader == null) { if (LOGGER.isLoggable(java.util.logging.Level.WARNING)) { LOGGER.warning(new StringBuilder("Unable to get s reader for granuleDescriptor ") .append(this.toString()).append(" with request ").append(request.toString()) .append(" Resulting in no granule loaded: Empty result").toString()); } return null; } // set input customizeReaderInitialization(reader, hints); reader.setInput(inStream); // Checking for heterogeneous granules if (request.isHeterogeneousGranules()) { // create read parameters readParameters = new ImageReadParam(); //override the overviews controller for the base layer imageIndex = ReadParamsController.setReadParams( request.spatialRequestHelper.getRequestedResolution(), request.getOverviewPolicy(), request.getDecimationPolicy(), readParameters, request.rasterManager, overviewsController); } else { imageIndex = index; readParameters = imageReadParameters; } //get selected level and base level dimensions final GranuleOverviewLevelDescriptor selectedlevel = getLevel(imageIndex, reader); // now create the crop grid to world which can be used to decide // which source area we need to crop in the selected level taking // into account the scale factors imposed by the selection of this // level together with the base level grid to world transformation AffineTransform2D cropWorldToGrid = new AffineTransform2D(selectedlevel.gridToWorldTransformCorner); cropWorldToGrid = (AffineTransform2D) cropWorldToGrid.inverse(); // computing the crop source area which lives into the // selected level raster space, NOTICE that at the end we need to // take into account the fact that we might also decimate therefore // we cannot just use the crop grid to world but we need to correct // it. final Rectangle sourceArea = CRS.transform(cropWorldToGrid, intersection).toRectangle2D().getBounds(); //gutter if (selectedlevel.baseToLevelTransform.isIdentity()) { sourceArea.grow(2, 2); } XRectangle2D.intersect(sourceArea, selectedlevel.rasterDimensions, sourceArea);//make sure roundings don't bother us // is it empty?? if (sourceArea.isEmpty()) { if (LOGGER.isLoggable(java.util.logging.Level.FINE)) { LOGGER.fine("Got empty area for granuleDescriptor " + this.toString() + " with request " + request.toString() + " Resulting in no granule loaded: Empty result"); } return null; } else if (LOGGER.isLoggable(java.util.logging.Level.FINER)) { LOGGER.finer("Loading level " + imageIndex + " with source region: " + sourceArea + " subsampling: " + readParameters.getSourceXSubsampling() + "," + readParameters.getSourceYSubsampling() + " for granule:" + granuleUrl); } // Setting subsampling int newSubSamplingFactor = 0; final String pluginName = cachedReaderSPI.getPluginClassName(); if (pluginName != null && pluginName.equals(ImageUtilities.DIRECT_KAKADU_PLUGIN)) { final int ssx = readParameters.getSourceXSubsampling(); final int ssy = readParameters.getSourceYSubsampling(); newSubSamplingFactor = ImageIOUtilities.getSubSamplingFactor2(ssx, ssy); if (newSubSamplingFactor != 0) { if (newSubSamplingFactor > maxDecimationFactor && maxDecimationFactor != -1) { newSubSamplingFactor = maxDecimationFactor; } readParameters.setSourceSubsampling(newSubSamplingFactor, newSubSamplingFactor, 0, 0); } } // set the source region readParameters.setSourceRegion(sourceArea); RenderedImage raster; try { // read raster = request.getReadType().read(readParameters, imageIndex, granuleUrl, selectedlevel.rasterDimensions, reader, hints, false); } catch (Throwable e) { if (LOGGER.isLoggable(java.util.logging.Level.FINE)) { LOGGER.log(java.util.logging.Level.FINE, "Unable to load raster for granuleDescriptor " + this.toString() + " with request " + request.toString() + " Resulting in no granule loaded: Empty result", e); } return null; } // use fixed source area sourceArea.setRect(readParameters.getSourceRegion()); // // setting new coefficients to define a new affineTransformation // to be applied to the grid to world transformation // ----------------------------------------------------------------------------------- // // With respect to the original envelope, the obtained planarImage // needs to be rescaled. The scaling factors are computed as the // ratio between the cropped source region sizes and the read // image sizes. // // place it in the mosaic using the coords created above; double decimationScaleX = ((1.0 * sourceArea.width) / raster.getWidth()); double decimationScaleY = ((1.0 * sourceArea.height) / raster.getHeight()); final AffineTransform decimationScaleTranform = XAffineTransform.getScaleInstance(decimationScaleX, decimationScaleY); // keep into account translation to work into the selected level raster space final AffineTransform afterDecimationTranslateTranform = XAffineTransform .getTranslateInstance(sourceArea.x, sourceArea.y); // now we need to go back to the base level raster space final AffineTransform backToBaseLevelScaleTransform = selectedlevel.baseToLevelTransform; // now create the overall transform final AffineTransform finalRaster2Model = new AffineTransform(baseGridToWorld); finalRaster2Model.concatenate(CoverageUtilities.CENTER_TO_CORNER); if (!XAffineTransform.isIdentity(backToBaseLevelScaleTransform, Utils.AFFINE_IDENTITY_EPS)) finalRaster2Model.concatenate(backToBaseLevelScaleTransform); if (!XAffineTransform.isIdentity(afterDecimationTranslateTranform, Utils.AFFINE_IDENTITY_EPS)) finalRaster2Model.concatenate(afterDecimationTranslateTranform); if (!XAffineTransform.isIdentity(decimationScaleTranform, Utils.AFFINE_IDENTITY_EPS)) finalRaster2Model.concatenate(decimationScaleTranform); // adjust roi if (useFootprint) { ROIGeometry transformed; try { transformed = roiProvider.getTransformedROI(finalRaster2Model.createInverse()); if (transformed.getAsGeometry().isEmpty()) { // inset might have killed the geometry fully return null; } PlanarImage pi = PlanarImage.wrapRenderedImage(raster); if (!transformed.intersects(pi.getBounds())) { return null; } pi.setProperty("ROI", transformed); raster = pi; } catch (NoninvertibleTransformException e) { if (LOGGER.isLoggable(java.util.logging.Level.INFO)) LOGGER.info("Unable to create a granuleDescriptor " + this.toString() + " due to a problem when managing the ROI"); return null; } } // keep into account translation factors to place this tile finalRaster2Model.preConcatenate((AffineTransform) mosaicWorldToGrid); final Interpolation interpolation = request.getInterpolation(); //paranoiac check to avoid that JAI freaks out when computing its internal layouT on images that are too small Rectangle2D finalLayout = ImageUtilities.layoutHelper(raster, (float) finalRaster2Model.getScaleX(), (float) finalRaster2Model.getScaleY(), (float) finalRaster2Model.getTranslateX(), (float) finalRaster2Model.getTranslateY(), interpolation); if (finalLayout.isEmpty()) { if (LOGGER.isLoggable(java.util.logging.Level.INFO)) LOGGER.info("Unable to create a granuleDescriptor " + this.toString() + " due to jai scale bug creating a null source area"); return null; } // apply the affine transform conserving indexed color model final RenderingHints localHints = new RenderingHints(JAI.KEY_REPLACE_INDEX_COLOR_MODEL, interpolation instanceof InterpolationNearest ? Boolean.FALSE : Boolean.TRUE); if (XAffineTransform.isIdentity(finalRaster2Model, Utils.AFFINE_IDENTITY_EPS)) { return new GranuleLoadingResult(raster, null, granuleUrl, doFiltering, pamDataset); } else { // // In case we are asked to use certain tile dimensions we tile // also at this stage in case the read type is Direct since // buffered images comes up untiled and this can affect the // performances of the subsequent affine operation. // final Dimension tileDimensions = request.getTileDimensions(); if (tileDimensions != null && request.getReadType().equals(ReadType.DIRECT_READ)) { final ImageLayout layout = new ImageLayout(); layout.setTileHeight(tileDimensions.width).setTileWidth(tileDimensions.height); localHints.add(new RenderingHints(JAI.KEY_IMAGE_LAYOUT, layout)); } else { if (hints != null && hints.containsKey(JAI.KEY_IMAGE_LAYOUT)) { final Object layout = hints.get(JAI.KEY_IMAGE_LAYOUT); if (layout != null && layout instanceof ImageLayout) { localHints .add(new RenderingHints(JAI.KEY_IMAGE_LAYOUT, ((ImageLayout) layout).clone())); } } } if (hints != null && hints.containsKey(JAI.KEY_TILE_CACHE)) { final Object cache = hints.get(JAI.KEY_TILE_CACHE); if (cache != null && cache instanceof TileCache) localHints.add(new RenderingHints(JAI.KEY_TILE_CACHE, (TileCache) cache)); } if (hints != null && hints.containsKey(JAI.KEY_TILE_SCHEDULER)) { final Object scheduler = hints.get(JAI.KEY_TILE_SCHEDULER); if (scheduler != null && scheduler instanceof TileScheduler) localHints.add(new RenderingHints(JAI.KEY_TILE_SCHEDULER, (TileScheduler) scheduler)); } boolean addBorderExtender = true; if (hints != null && hints.containsKey(JAI.KEY_BORDER_EXTENDER)) { final Object extender = hints.get(JAI.KEY_BORDER_EXTENDER); if (extender != null && extender instanceof BorderExtender) { localHints.add(new RenderingHints(JAI.KEY_BORDER_EXTENDER, (BorderExtender) extender)); addBorderExtender = false; } } // BORDER extender if (addBorderExtender) { localHints.add(ImageUtilities.BORDER_EXTENDER_HINTS); } ImageWorker iw = new ImageWorker(raster); iw.setRenderingHints(localHints); iw.affine(finalRaster2Model, interpolation, request.getBackgroundValues()); return new GranuleLoadingResult(iw.getRenderedImage(), null, granuleUrl, doFiltering, pamDataset); } } catch (IllegalStateException e) { if (LOGGER.isLoggable(java.util.logging.Level.WARNING)) { LOGGER.log(java.util.logging.Level.WARNING, new StringBuilder("Unable to load raster for granuleDescriptor ").append(this.toString()) .append(" with request ").append(request.toString()) .append(" Resulting in no granule loaded: Empty result").toString(), e); } return null; } catch (org.opengis.referencing.operation.NoninvertibleTransformException e) { if (LOGGER.isLoggable(java.util.logging.Level.WARNING)) { LOGGER.log(java.util.logging.Level.WARNING, new StringBuilder("Unable to load raster for granuleDescriptor ").append(this.toString()) .append(" with request ").append(request.toString()) .append(" Resulting in no granule loaded: Empty result").toString(), e); } return null; } catch (TransformException e) { if (LOGGER.isLoggable(java.util.logging.Level.WARNING)) { LOGGER.log(java.util.logging.Level.WARNING, new StringBuilder("Unable to load raster for granuleDescriptor ").append(this.toString()) .append(" with request ").append(request.toString()) .append(" Resulting in no granule loaded: Empty result").toString(), e); } return null; } finally { try { if (request.getReadType() != ReadType.JAI_IMAGEREAD && inStream != null) { inStream.close(); } } finally { if (request.getReadType() != ReadType.JAI_IMAGEREAD && reader != null) { reader.dispose(); } } } }