Friday, November 27, 2020

Hello Radio: How to Listen to FM Radio Using LimeSDR

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LimeSDR is an open source software defined radio which can support a continuous frequency range from 100KHz to 3.8GHz. Many wireless systems...
Tuesday, November 24, 2020

Signal Processing Magic (7) -- Doppler Shift, Rayleigh fading and Jakes model

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Doppler shift was discovered by a physicist named Christian Doppler long time ago. Doppler shift is used to characterize the frequency chang...

Low Light Image Combining Using Python (3) -- Running Even Faster

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In this blog, we will discuss how to make lower light image combining run even faster.  Image alignment is the most time-consuming stage of ...
Saturday, April 4, 2020

Low Light Image Combining Using Python (2) -- Running Faster

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In a previous  blog , a Python script to combine several low light raw images for improved SNR has been introduced. But that script runs rat...
Sunday, March 29, 2020

Low Light Image Combining Using Python (1)

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Low light images are photos taken while it is dark. Low light images are usually noisy since there is not enough light coming in. To reduce ...
Sunday, February 16, 2020

LibRaw Post Processing Pipeline Translated Into Python (2) -- Low Light Photo

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In a previous post , we introduced a Python script which emulates the pipeline of LibRaw. LibRaw is a commonly used library for raw image co...
Monday, December 30, 2019

An Android App for Photo Brightening

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I published an Android app used for photo brightening named Brighter Phot o. Using a low light photo as the input, the app can post process ...