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- /*
- * 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 <https://www.gnu.org/licenses/>.
- *
- */
-
- #include <stdio.h>
- #include <math.h>
-
- #include "offsets.h"
-
- typedef struct {
- float r, g, b;
- } rgb_t;
-
- extern rgb_t RGBcomposite(rgb_t top, float top_a, rgb_t bottom, float bottom_a);
-
- static struct {
- rgb_t Sea, Land, Cloud;
- int Seaintensity, Seaoffset;
- int Landthreshold, Landintensity, Landoffset;
- int Cloudthreshold, Cloudintensity;
- } fcinfo = {
- {28, 44, 95},
- {23, 78, 37},
- {240, 250, 255},
- 50, 10,
- 24, 34, 14,
- 141, 114
- };
-
- // Read the config file
- int readfcconf(char *file) {
- FILE *fin;
- fin = fopen(file, "r");
-
- if (fin == NULL)
- return 0;
-
- 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, "%d\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);
-
- return 1;
- };
-
- rgb_t falsecolor(float vis, float temp){
- rgb_t buffer;
- float land = 0.0, sea, cloud;
-
- // Calculate intensity of sea
- sea = CLIP(vis+fcinfo.Seaoffset, 0, fcinfo.Seaintensity)/fcinfo.Seaintensity;
-
- // Land
- if(vis > fcinfo.Landthreshold)
- land = CLIP(vis-fcinfo.Landoffset, 0, fcinfo.Landintensity)/fcinfo.Landintensity;
-
- // Composite land on sea
- buffer = RGBcomposite(fcinfo.Land, land, fcinfo.Sea, sea);
-
- // Composite clouds on top
- cloud = CLIP(temp-fcinfo.Cloudthreshold, 0, fcinfo.Cloudintensity)/fcinfo.Cloudintensity;
- buffer = RGBcomposite(fcinfo.Cloud, cloud, buffer, 1);
-
- return buffer;
- }
-
- // GVI (global vegetation index) false color
- void Ngvi(float **prow, int nrow) {
- printf("Computing GVI false color");
-
- for (int n = 0; n < nrow; n++) {
- float *pixelv = prow[n];
-
- for (int i = 0; i < CH_WIDTH; i++) {
- double gvi = (pixelv[i + CHA_OFFSET] - pixelv[i + CHB_OFFSET])/
- (pixelv[i + CHA_OFFSET] + pixelv[i + CHB_OFFSET]);
-
- gvi = (gvi + 0.1) * 340.0;
- pixelv[i + CHB_OFFSET] = CLIP(gvi, 0, 255);
- }
- }
- printf("\nDone\n");
- };
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