public static void checkEquals( BufferedImage imgA, MultiSpectral imgB, boolean boofcvBandOrder, float tol) { if (imgA.getRaster() instanceof ByteInterleavedRaster && imgA.getType() != BufferedImage.TYPE_BYTE_INDEXED) { ByteInterleavedRaster raster = (ByteInterleavedRaster) imgA.getRaster(); if (raster.getNumBands() == 1) { GImageSingleBand band = FactoryGImageSingleBand.wrap(imgB.getBand(0)); int strideA = raster.getScanlineStride(); int offsetA = raster.getDataOffset(0) - raster.getPixelStride() + 1; // handle a special case where the RGB conversion is screwed for (int i = 0; i < imgA.getHeight(); i++) { for (int j = 0; j < imgA.getWidth(); j++) { double valB = band.get(j, i).doubleValue(); int valA = raster.getDataStorage()[offsetA + i * strideA + j]; valA &= 0xFF; if (Math.abs(valA - valB) > tol) throw new RuntimeException("Images are not equal: A = " + valA + " B = " + valB); } } return; } } int bandOrder[]; if (boofcvBandOrder) { if (imgB.getNumBands() == 4) { bandOrder = new int[] {1, 2, 3, 0}; } else { bandOrder = new int[] {0, 1, 2}; } } else { if (imgA.getType() == BufferedImage.TYPE_INT_RGB) { bandOrder = new int[] {0, 1, 2}; } else if (imgA.getType() == BufferedImage.TYPE_INT_BGR || imgA.getType() == BufferedImage.TYPE_3BYTE_BGR) { bandOrder = new int[] {2, 1, 0}; } else if (imgA.getType() == BufferedImage.TYPE_4BYTE_ABGR) { bandOrder = new int[] {0, 3, 2, 1}; } else if (imgA.getType() == BufferedImage.TYPE_INT_ARGB) { bandOrder = new int[] {0, 1, 2, 3}; } else { bandOrder = new int[] {0, 1, 2}; } } int expected[] = new int[4]; for (int y = 0; y < imgA.getHeight(); y++) { for (int x = 0; x < imgA.getWidth(); x++) { // getRGB() automatically converts the band order to ARGB int rgb = imgA.getRGB(x, y); expected[0] = ((rgb >>> 24) & 0xFF); // alpha expected[1] = ((rgb >>> 16) & 0xFF); // red expected[2] = ((rgb >>> 8) & 0xFF); // green expected[3] = (rgb & 0xFF); // blue if (imgB.getNumBands() == 4) { for (int i = 0; i < 4; i++) { double found = GeneralizedImageOps.get(imgB.getBand(bandOrder[i]), x, y); if (Math.abs(Math.exp(expected[i] - found)) > tol) { for (int j = 0; j < 4; j++) { System.out.println( expected[j] + " " + GeneralizedImageOps.get(imgB.getBand(bandOrder[j]), x, y)); } throw new RuntimeException( "Images are not equal: band - " + i + " type " + imgA.getType()); } } } else if (imgB.getNumBands() == 3) { for (int i = 0; i < 3; i++) { double found = GeneralizedImageOps.get(imgB.getBand(bandOrder[i]), x, y); if (Math.abs(expected[i + 1] - found) > tol) { for (int j = 0; j < 3; j++) { System.out.println( expected[j + 1] + " " + GeneralizedImageOps.get(imgB.getBand(bandOrder[j]), x, y)); } throw new RuntimeException( "Images are not equal: band - " + i + " type " + imgA.getType()); } } } else { throw new RuntimeException("Unexpectd number of bands"); } } } }