DSP tutorial: SSTV decoding with slant correction
Last modified: March 18th, 2012This improved SSTV decoder corrects slant using the Hough transform. I’ve put a moving average lowpass filter before the FM demodulator part to reduce noise, as you can see, this helps a lot:
MMSSTV’s image is on the right. The lowpass filters reduce noise but they keep the details. Here’s a video of my app and MMSSTV decoding a distorted signal:
Resources
Slant correction using the Hough transform
SSTV signal generator
Open source SSTV apps:
Source code
download (4.9 mb)
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I'm Nonoo. This is my blog about music, sounds, filmmaking, amateur radio, computers, programming, electronics and other things I'm obsessed with.
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