add gaussian noise and denoising\barbara.raw
................................\criss-cross.raw
................................\dct_trf.c
................................\dct_trf.h
................................\graphics.raw
................................\lena.raw
................................\Makefile
................................\noise.c
................................\noise.h
................................\photo1.raw
................................\photo2.raw
................................\README
................................\support_routines.c
................................\support_routines.h
................................\weighted_dct_denoise.c
add gaussian noise and denoising