v.invert v.invert subtracts each pixel from a value. v.invert subtracts each pixel from a value. The default value is 255, so in the default case, v.invert "inverts" the image. v.invert works on all component sizes. For yuv images, v.invert simply changes the sign of the u and v components, while subtracting the y component from the integer value.	from the library : softVNS Format : External Environment : jitter / max commercial Max 4.x http://homepage.mac.com/davidrokeby/softVNS.html