/* * This file is part of Aptdec. * Copyright (c) 2004-2009 Thierry Leconte (F4DWV), Xerbo (xerbo@protonmail.com) 2019-2020 * * Aptdec 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 2 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 . * */ #include #include #include "offsets.h" typedef struct { float r, g, b, a; } rgba; static struct { rgba Sea; rgba Land; rgba Cloud; int Seaintensity; float Seaoffset; int Landthreshold; int Landintensity; int Landoffset; int Cloudthreshold; int Cloudintensity; } fcinfo = { {28, 44, 95, 1}, {23, 78, 37, 1}, {240, 250, 255, 1}, 50, 0.5, 24, 34, 14, 141, 114 }; // Read the config file void readfcconf(char *file) { FILE *fin; fin = fopen(file, "r"); if (fin == NULL) return; fscanf(fin, "%g %g %g\n", &fcinfo.Sea.r, &fcinfo.Sea.g, &fcinfo.Sea.b); fscanf(fin, "%g %g %g\n", &fcinfo.Land.r, &fcinfo.Land.g, &fcinfo.Land.b); fscanf(fin, "%g %g %g\n", &fcinfo.Cloud.r, &fcinfo.Cloud.g, &fcinfo.Cloud.b); fscanf(fin, "%d\n", &fcinfo.Seaintensity); fscanf(fin, "%g\n", &fcinfo.Seaoffset); fscanf(fin, "%d\n", &fcinfo.Landthreshold); fscanf(fin, "%d\n", &fcinfo.Landintensity); fscanf(fin, "%d\n", &fcinfo.Landoffset); fscanf(fin, "%d\n", &fcinfo.Cloudthreshold); fscanf(fin, "%d", &fcinfo.Cloudintensity); fclose(fin); }; // RGBA Composite rgba composite(rgba top, rgba bottom){ rgba composite; composite.r = MCOMPOSITE(top.r, top.a, bottom.r, bottom.a); composite.g = MCOMPOSITE(top.g, top.a, bottom.g, bottom.a); composite.b = MCOMPOSITE(top.b, top.a, bottom.b, bottom.a); composite.a = bottom.a == 1 || top.a == 1 ? 1 : (top.a+bottom.a)/2; return composite; } void falsecolor(float vis, float temp, float *r, float *g, float *b){ rgba buffer; fcinfo.Land.a = 0.0f; fcinfo.Sea.a = 0.0f; // Calculate intensity of sea and land fcinfo.Sea.a = CLIP(vis, 0, 20)/fcinfo.Seaintensity + fcinfo.Seaoffset; if(vis > fcinfo.Landthreshold) fcinfo.Land.a = CLIP(vis-fcinfo.Landoffset, 0, fcinfo.Landintensity)/fcinfo.Landintensity; // Composite land on top of sea buffer = composite(fcinfo.Land, fcinfo.Sea); buffer.a = 1.0f; // Composite clouds on top fcinfo.Cloud.a = CLIP(temp-fcinfo.Cloudthreshold, 0, fcinfo.Cloudintensity)/fcinfo.Cloudintensity; buffer = composite(fcinfo.Cloud, buffer); *r = buffer.r; *g = buffer.g; *b = buffer.b; } // GVI (global vegetation index) false color void Ngvi(float **prow, int nrow) { printf("Computing GVI false color\n"); fflush(stdout); for (int n = 0; n < nrow; n++) { float *pixelv = prow[n]; for (int i = 0; i < CH_WIDTH; i++) { float pv; double gvi; gvi = (pixelv[i + CHA_OFFSET] - pixelv[i + CHB_OFFSET]) / (pixelv[i + CHA_OFFSET] + pixelv[i + CHB_OFFSET]); pv = (gvi + 0.1) * 340.0; pv = CLIP(pv, 0, 255); pixelv[i + CHB_OFFSET] = pv; } } };