Edit help text

iizukanao · Jul 21, 2022 · 7ac6d1c · 7ac6d1c
1 parent 76ce10f
commit 7ac6d1c
Showing 1 changed file with 8 additions and 4 deletions.
diff --git a/picam_option/picam_option.cpp b/picam_option/picam_option.cpp
@@ -37,10 +37,14 @@ void PicamOption::print_usage() {
   log_info("                      (default: %s)\n", defaultOption.video_avc_profile);
   log_info("  --avclevel <value>  Set AVC/H.264 level (default: %s)\n", defaultOption.video_avc_level);
 
-  log_info("  --brightness <num>  Set image brightness (-1.0 .. 1.0) (default: %.1f)\n", defaultOption.video_brightness);
-  log_info("  --contrast <num>    Set image contrast (default: %.1f)\n", defaultOption.video_contrast);
-  log_info("  --saturation <num>  Set image color saturation (default: %.1f)\n", defaultOption.video_saturation);
-  log_info("  --sharpness <num>   Set image sharpness (>= 0.0) (default: %.1f)\n", defaultOption.video_sharpness);
+  log_info("  --brightness <num>  Adjust image brightness (default: %.1f)\n", defaultOption.video_brightness);
+  log_info("                      0.0=unchanged / -1.0=darkest / 1.0=brightest\n");
+  log_info("  --contrast <num>    Adjust image contrast (default: %.1f)\n", defaultOption.video_contrast);
+  log_info("                      1.0=normal / >1.0=more contrast\n");
+  log_info("  --saturation <num>  Adjust image color saturation (default: %.1f)\n", defaultOption.video_saturation);
+  log_info("                      1.0=normal / 0.0=grayscale / >1.0=more saturated\n");
+  log_info("  --sharpness <num>   Adjust image sharpness (default: %.1f)\n", defaultOption.video_sharpness);
+  log_info("                      0.0=no sharpening / >0.0=sharpened\n");
   // log_info("  --qpmin <num>       Minimum quantization level (0..51)\n");
   // log_info("  --qpmax <num>       Maximum quantization level (0..51)\n");
   // log_info("  --qpinit <num>      Initial quantization level\n");