thermal

deepseek/Readme

@@ -1,3 +1,4 @@
 Here are some files generated by deepseek and fixed by me:
 
 hashreplace.c - replase words in text by replacement table using hashing and binary search
+thermal.c - ASSCII-set for thermal data 16-levels mapping

deepseek/thermal.c

@@ -0,0 +1,72 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+// 16-level character set ordered by fill percentage (provided by user)
+const char* CHARS_16 = " .':;+*oxX#&%B$@";
+
+void print_thermal_ascii(float data[24][32]) {
+    // Find min and max values
+    float min_val = data[0][0];
+    float max_val = data[0][0];
+    
+    for (int i = 0; i < 24; i++) {
+        for (int j = 0; j < 32; j++) {
+            if (data[i][j] < min_val) min_val = data[i][j];
+            if (data[i][j] > max_val) max_val = data[i][j];
+        }
+    }
+    
+    // Handle case where all values are the same
+    if (max_val - min_val < 0.001) {
+        min_val -= 1.0;
+        max_val += 1.0;
+    }
+    
+    // Generate and print ASCII art
+    for (int i = 0; i < 24; i++) {
+        for (int j = 0; j < 32; j++) {
+            // Normalize value to [0, 1] range
+            float normalized = (data[i][j] - min_val) / (max_val - min_val);
+            
+            // Map to character index (0 to 15)
+            int index = (int)(normalized * 15 + 0.5);
+            
+            // Ensure we stay within bounds
+            if (index < 0) index = 0;
+            if (index > 15) index = 15;
+            
+            putchar(CHARS_16[index]);
+        }
+        putchar('\n');
+    }
+    
+    // Print the temperature range for reference
+    printf("\nTemperature range: %.2f to %.2f\n", min_val, max_val);
+}
+
+// Helper function to generate sample data
+void generate_sample_data(float data[24][32]) {
+    for (int i = 0; i < 24; i++) {
+        for (int j = 0; j < 32; j++) {
+            // Create a gradient with a hot spot in the center
+            float dx = j - 16;
+            float dy = i - 12;
+            float distance = sqrt(dx*dx + dy*dy);
+            data[i][j] = 20.0 + 30.0 * exp(-distance/8.0);
+        }
+    }
+}
+
+int main() {
+    float thermal_data[24][32];
+    
+    // Generate sample thermal data
+    generate_sample_data(thermal_data);
+    
+    // Print thermal image
+    printf("Thermal image (16 levels):\n");
+    print_thermal_ascii(thermal_data);
+    
+    return 0;
+}