/* * Copyright (C) 2013 Dr. John Lindsay <jlindsay@uoguelph.ca> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package plugins; import java.util.Date; import whitebox.geospatialfiles.WhiteboxRaster; import whitebox.geospatialfiles.WhiteboxRasterInfo; import whitebox.interfaces.WhiteboxPlugin; import whitebox.interfaces.WhiteboxPluginHost; /** * This tool transforms three raster images of multispectral data (red, green, and blue channels) into their equivalent intensity, hue, and saturation (IHS; sometimes HSI or HIS) images. * @author Dr. John Lindsay email: jlindsay@uoguelph.ca */ public class RGBtoIHS implements WhiteboxPlugin { private WhiteboxPluginHost myHost = null; private String[] args; /** * Used to retrieve the plugin tool's name. This is a short, unique name * containing no spaces. * * @return String containing plugin name. */ @Override public String getName() { return "RGBtoIHS"; } /** * Used to retrieve the plugin tool's descriptive name. This can be a longer * name (containing spaces) and is used in the interface to list the tool. * * @return String containing the plugin descriptive name. */ @Override public String getDescriptiveName() { return "RGB to IHS"; } /** * Used to retrieve a short description of what the plugin tool does. * * @return String containing the plugin's description. */ @Override public String getToolDescription() { return "Converts red, green, and blue (RGB) images into intensity, hue, and saturation (IHS) images"; } /** * Used to identify which toolboxes this plugin tool should be listed in. * * @return Array of Strings. */ @Override public String[] getToolbox() { String[] ret = {"ImageTransformations"}; return ret; } /** * Sets the WhiteboxPluginHost to which the plugin tool is tied. This is the * class that the plugin will send all feedback messages, progress updates, * and return objects. * * @param host The WhiteboxPluginHost that called the plugin tool. */ @Override public void setPluginHost(WhiteboxPluginHost host) { myHost = host; } /** * Used to communicate feedback pop-up messages between a plugin tool and * the main Whitebox user-interface. * * @param feedback String containing the text to display. */ private void showFeedback(String message) { if (myHost != null) { myHost.showFeedback(message); } else { System.out.println(message); } } /** * Used to communicate a return object from a plugin tool to the main * Whitebox user-interface. * * @return Object, such as an output WhiteboxRaster. */ private void returnData(Object ret) { if (myHost != null) { myHost.returnData(ret); } } private int previousProgress = 0; private String previousProgressLabel = ""; /** * Used to communicate a progress update between a plugin tool and the main * Whitebox user interface. * * @param progressLabel A String to use for the progress label. * @param progress Float containing the progress value (between 0 and 100). */ private void updateProgress(String progressLabel, int progress) { if (myHost != null && ((progress != previousProgress) || (!progressLabel.equals(previousProgressLabel)))) { myHost.updateProgress(progressLabel, progress); } previousProgress = progress; previousProgressLabel = progressLabel; } /** * Used to communicate a progress update between a plugin tool and the main * Whitebox user interface. * * @param progress Float containing the progress value (between 0 and 100). */ private void updateProgress(int progress) { if (myHost != null && progress != previousProgress) { myHost.updateProgress(progress); } previousProgress = progress; } /** * Sets the arguments (parameters) used by the plugin. * * @param args An array of string arguments. */ @Override public void setArgs(String[] args) { this.args = args.clone(); } private boolean cancelOp = false; /** * Used to communicate a cancel operation from the Whitebox GUI. * * @param cancel Set to true if the plugin should be canceled. */ @Override public void setCancelOp(boolean cancel) { cancelOp = cancel; } private void cancelOperation() { showFeedback("Operation cancelled."); updateProgress("Progress: ", 0); } private boolean amIActive = false; /** * Used by the Whitebox GUI to tell if this plugin is still running. * * @return a boolean describing whether or not the plugin is actively being * used. */ @Override public boolean isActive() { return amIActive; } /** * Used to execute this plugin tool. */ @Override public void run() { /* * This transformation has been taken from: * http://ij.ms3d.de/pdf/ihs_transforms.pdf * in reference to Haydn, Dalke, and Henkel (1982) * Note: 0 <= I <= 3, 0 <= H <= 3, 0 <= S <= 1 */ amIActive = true; String redHeader, greenHeader, blueHeader, intensityHeader, saturationHeader, hueHeader; if (args.length <= 0) { showFeedback("Plugin parameters have not been set."); return; } redHeader = args[0]; greenHeader = args[1]; blueHeader = args[2]; intensityHeader = args[3]; hueHeader = args[4]; saturationHeader = args[5]; // check to see that the inputHeader and outputHeader are not null. if (redHeader.isEmpty() || greenHeader.isEmpty() || blueHeader == null || intensityHeader.isEmpty() || hueHeader.isEmpty() || saturationHeader.isEmpty()) { showFeedback("One or more of the input parameters have not been set properly."); return; } try { int row, col; double redVal, greenVal, blueVal; // double redRange, greenRange, blueRange; // double redMin, greenMin, blueMin; double r, g, b; double i, s, h, m; float progress; WhiteboxRasterInfo red = new WhiteboxRasterInfo(redHeader); int rows = red.getNumberRows(); int cols = red.getNumberColumns(); WhiteboxRasterInfo green = new WhiteboxRasterInfo(greenHeader); if (green.getNumberRows() != rows || green.getNumberColumns() != cols) { showFeedback("All input images must have the same dimensions."); return; } WhiteboxRasterInfo blue = new WhiteboxRasterInfo(blueHeader); if (blue.getNumberRows() != rows || blue.getNumberColumns() != cols) { showFeedback("All input images must have the same dimensions."); return; } double redNoData = red.getNoDataValue(); double greenNoData = green.getNoDataValue(); double blueNoData = blue.getNoDataValue(); WhiteboxRaster intensity = new WhiteboxRaster(intensityHeader, "rw", redHeader, WhiteboxRaster.DataType.FLOAT, redNoData); WhiteboxRaster hue = new WhiteboxRaster(hueHeader, "rw", redHeader, WhiteboxRaster.DataType.FLOAT, redNoData); WhiteboxRaster saturation = new WhiteboxRaster(saturationHeader, "rw", redHeader, WhiteboxRaster.DataType.FLOAT, redNoData); // redMin = red.getDisplayMinimum(); // greenMin = green.getDisplayMinimum(); // blueMin = blue.getDisplayMinimum(); // // redRange = red.getDisplayMaximum() - redMin; // greenRange = green.getDisplayMaximum() - greenMin; // blueRange = blue.getDisplayMaximum() - blueMin; double overallMin = Math.min(Math.min(red.getDisplayMinimum(), green.getDisplayMinimum()), blue.getDisplayMinimum()); double overallMax = Math.max(Math.max(red.getDisplayMaximum(), green.getDisplayMaximum()), blue.getDisplayMaximum()); double range = overallMax - overallMin; double[] dataRed, dataGreen, dataBlue; for (row = 0; row < rows; row++) { dataRed = red.getRowValues(row); dataGreen = green.getRowValues(row); dataBlue = blue.getRowValues(row); for (col = 0; col < cols; col++) { redVal = dataRed[col]; greenVal = dataGreen[col]; blueVal = dataBlue[col]; if ((redVal != redNoData) && (greenVal != greenNoData) && (blueVal != blueNoData)) { r = (redVal - overallMin) / range; if (r < 0) { r = 0; } if (r > 1) { r = 1; } g = (greenVal - overallMin) / range; if (g < 0) { g = 0; } if (g > 1) { g = 1; } b = (blueVal - overallMin) / range; if (b < 0) { b = 0; } if (b > 1) { b = 1; } m = Math.min(Math.min(r, g), b); i = r + g + b; if (i == 3) { h = 0; } else if (m == b) { h = (g - b) / (i - 3 * b); } else if (m == r) { h = (b - r) / (i - 3 * r) + 1; } else { // m == g h = (r - g) / (i - 3 * g) + 2; } if (h <= 1) { s = (i - 3 * b) / i; } else if (h <= 2) { s = (i - 3 * r) / i; } else { // H <= 3 s = (i - 3 * g) / i; } intensity.setValue(row, col, i); hue.setValue(row, col, h); saturation.setValue(row, col, s); } else { intensity.setValue(row, col, redNoData); hue.setValue(row, col, redNoData); saturation.setValue(row, col, redNoData); } } if (cancelOp) { cancelOperation(); return; } progress = (float) (100f * row / (rows - 1)); updateProgress((int) progress); } intensity.addMetadataEntry("Created by the " + getDescriptiveName() + " tool."); intensity.addMetadataEntry("Created on " + new Date()); intensity.close(); hue.addMetadataEntry("Created by the " + getDescriptiveName() + " tool."); hue.addMetadataEntry("Created on " + new Date()); hue.close(); saturation.addMetadataEntry("Created by the " + getDescriptiveName() + " tool."); saturation.addMetadataEntry("Created on " + new Date()); saturation.close(); red.close(); green.close(); blue.close(); // returning a header file string displays the image. returnData(intensityHeader); returnData(hueHeader); returnData(saturationHeader); } catch (OutOfMemoryError oe) { myHost.showFeedback("An out-of-memory error has occurred during operation."); } catch (Exception e) { myHost.showFeedback("An error has occurred during operation. See log file for details."); myHost.logException("Error in " + getDescriptiveName(), e); } finally { updateProgress("Progress: ", 0); // tells the main application that this process is completed. amIActive = false; myHost.pluginComplete(); } } }