X-Git-Url: https://cads.iiap.res.in/gitview/?p=fits2jpeg.git;a=blobdiff_plain;f=src%2Fmessages.c;h=75f890c1f43ec93750bc0c61af0170f9092f4372;hp=4386e5578e97b67b0afddde5460260e6dc2852e7;hb=c217f20a424f31d11946263980a8f14ca7a79a0e;hpb=e31da38fa70e45758bd0c82b124c018c25e78e23

diff --git a/src/messages.c b/src/messages.c
index 4386e55..75f890c 100644
--- a/src/messages.c
+++ b/src/messages.c
@@ -47,7 +47,7 @@ void usage()
     printf ("         log            for log scale                      \n");
     printf ("         normalize      for linear histogram stretch       \n");
     printf ("         equalize       for histogram equalization         \n");
-    printf ("    -c <min>:<max>                                         \n");
+    printf ("    -r <min>:<max>                                         \n");
     printf ("       Clip output image to min-max range. Eg:             \n");
     printf ("         0:100          Use only values in the range 0-100 \n");
     printf ("         100:0          Same as above, but negative image  \n");
@@ -55,13 +55,16 @@ void usage()
     printf ("         10:            Clip everything below 10           \n");
     printf ("    -n                                                     \n");
     printf ("       Negate the image                                    \n");
-    printf ("    -q                                                     \n");
+    printf ("    -q <value>                                             \n");
     printf ("       quality factor. Defines the jpeg encoding quality   \n");
     printf ("       Valid range: 0-100, default value: 100 (max.quality)\n");
     printf ("    -z <zoomfactor>                                        \n");
     printf ("       Resize/Scale output image by <zoomfactor>. Eg:      \n");
     printf ("         0.5            Shrink output to half of input     \n");
     printf ("         2.0            Magnify output to double the size  \n");
+    printf ("                        Allowed range: 0.01 to 4.0         \n");
+    printf ("       NOTE: Zooming will be carried out after all other   \n");
+    printf ("             operations, before writing out jpeg image     \n");
     printf ("  Output will be written to <fits_file_root>.jpg. Wild card\n");
     printf ("  entries allowed in <fits_file>; For eg: *.fits, m31*.fits\n");
     printf ("  ngc???.fits etc.                                         \n");