| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.sanselan.formats.tiff.photometricinterpreters; |
| |
| import java.awt.image.BufferedImage; |
| import java.io.IOException; |
| |
| import org.apache.commons.sanselan.ImageReadException; |
| |
| public class PhotometricInterpreterLogLUV extends PhotometricInterpreter |
| { |
| // private final boolean yOnly; |
| |
| public PhotometricInterpreterLogLUV(int fSamplesPerPixel, |
| int fBitsPerSample[], int Predictor, int width, int height, |
| boolean yonly) |
| { |
| super(fSamplesPerPixel, fBitsPerSample, Predictor, width, height); |
| |
| // this.yOnly = yonly; |
| } |
| |
| public void dumpstats() throws ImageReadException, IOException |
| { |
| } |
| |
| private float cube(float f) |
| { |
| return f * f * f; |
| } |
| |
| // private float function_f(float value, ) |
| |
| public void interpretPixel(BufferedImage bi, int samples[], int x, int y) |
| throws ImageReadException, IOException |
| { |
| float X, Y, Z; |
| |
| int cieL = samples[0]; |
| int cieA = (byte) samples[1]; |
| int cieB = (byte) samples[2]; |
| |
| { |
| |
| float var_Y = ((cieL * 100.0f / 255.0f) + 16.0f) / 116.0f; |
| float var_X = cieA / 500.0f + var_Y; |
| float var_Z = var_Y - cieB / 200.0f; |
| |
| float var_x_cube = cube(var_X); |
| float var_y_cube = cube(var_Y); |
| float var_z_cube = cube(var_Z); |
| |
| if (var_y_cube > 0.008856f) |
| var_Y = var_y_cube; |
| else |
| var_Y = (var_Y - 16 / 116.0f) / 7.787f; |
| |
| if (var_x_cube > 0.008856f) |
| var_X = var_x_cube; |
| else |
| var_X = (var_X - 16 / 116.0f) / 7.787f; |
| |
| if (var_z_cube > 0.008856f) |
| var_Z = var_z_cube; |
| else |
| var_Z = (var_Z - 16 / 116.0f) / 7.787f; |
| |
| float ref_X = 95.047f; |
| float ref_Y = 100.000f; |
| float ref_Z = 108.883f; |
| |
| X = ref_X * var_X; //ref_X = 95.047 Observer= 2°, Illuminant= D65 |
| Y = ref_Y * var_Y; //ref_Y = 100.000 |
| Z = ref_Z * var_Z; //ref_Z = 108.883 |
| |
| } |
| |
| // ref_X = 95.047 //Observer = 2°, Illuminant = D65 |
| // ref_Y = 100.000 |
| // ref_Z = 108.883 |
| |
| int R, G, B; |
| { |
| float var_X = X / 100f; //X = From 0 to ref_X |
| float var_Y = Y / 100f; //Y = From 0 to ref_Y |
| float var_Z = Z / 100f; //Z = From 0 to ref_Y |
| |
| float var_R = var_X * 3.2406f + var_Y * -1.5372f + var_Z * -0.4986f; |
| float var_G = var_X * -0.9689f + var_Y * 1.8758f + var_Z * 0.0415f; |
| float var_B = var_X * 0.0557f + var_Y * -0.2040f + var_Z * 1.0570f; |
| |
| if (var_R > 0.0031308) |
| var_R = 1.055f * (float) Math.pow(var_R, (1 / 2.4)) - 0.055f; |
| else |
| var_R = 12.92f * var_R; |
| if (var_G > 0.0031308) |
| var_G = 1.055f * (float) Math.pow(var_G, (1 / 2.4)) - 0.055f; |
| else |
| var_G = 12.92f * var_G; |
| |
| if (var_B > 0.0031308) |
| var_B = 1.055f * (float) Math.pow(var_B, (1 / 2.4)) - 0.055f; |
| else |
| var_B = 12.92f * var_B; |
| |
| // var_R = (((var_R-))) |
| // updateMaxMin(new float[]{ |
| // var_R, var_G, var_B, |
| // }, maxVarRGB, minVarRGB); |
| |
| // var_R = ((var_R + 0.16561039f) / (3.0152583f + 0.16561039f)); |
| // var_G = ((var_G + 0.06561642f) / (3.0239854f + 0.06561642f)); |
| // var_B = ((var_B + 0.19393992f) / (3.1043448f + 0.19393992f)); |
| |
| R = (int) (var_R * 255f); |
| G = (int) (var_G * 255f); |
| B = (int) (var_B * 255f); |
| } |
| |
| // float R = 1.910f * X - 0.532f * Y - 0.288f * Z; |
| // float G = -0.985f * X + 1.999f * Y - 0.028f * Z; |
| // float B = 0.058f * X - 0.118f * Y + 0.898f * Z; |
| |
| // updateMaxMin(new float[]{ |
| // R, G, B, |
| // }, maxRGB, minRGB); |
| |
| int red = R; |
| int green = G; |
| int blue = B; |
| |
| red = Math.min(255, Math.max(0, red)); |
| green = Math.min(255, Math.max(0, green)); |
| blue = Math.min(255, Math.max(0, blue)); |
| int alpha = 0xff; |
| int rgb = (alpha << 24) | (red << 16) | (green << 8) | (blue << 0); |
| bi.setRGB(x, y, rgb); |
| |
| } |
| } |