HET-609: My Pictures and Figures
by Luis Argüelles
Unsharp Mask on M42

Unprocessed image


After applying a low-pass filter (mask)


After mutipying the image x5

After subtracting the mask two times

Source: M42 image taken with the UCSB Remote Optical Telescope, University of California, Santa Barbara
Camera: 576x384 pixels CCD
Integratioh time: 1 second.
No filter
Telescope: Celestron C-14
Date: 22nd, January, 1999