Update index.md

index.md

@@ -57,7 +57,7 @@ optional arguments:
 
 # Image Masking and Transformation
 
-Breizorro uses the minimal filter to generate binary masks by replacing each pixel's value with the lowest value found in its near vicinity. This is incredibly effective at reducing noise and highlighting or smoothing particular regions of a picture, such as the regions surrounding bright or small sources. Users can specify a window (or kernel) of a specific size that moves over the image as well as a sigma threshold for masking.
+Breizorro uses the minimal filter to generate binary masks by replacing each pixel's value with the lowest value found in its near vicinity. This is incredibly effective at reducing noise and highlighting or smoothing particular regions of an image, such as the regions surrounding bright or small sources. Users can specify a window (or kernel) of a specific size that moves over the image as well as a sigma threshold for masking.
 
 ```
 breizorro -t 6.5 -b 50 -r circinus-MFS-image.fits