MWMathias Winther Madsenintodayilearned.hashnode.dev·Jan 13, 2023 · 3 min readA 96% Accurate OCR System from 1959Here's an interesting idea: instead of measuring the similarity of two black and white images by counting the number of identical pixels, group the pixels randomly into pairs and count the number of identical pairs. Once you have defined this altern...00
MWMathias Winther Madsenintodayilearned.hashnode.dev·Dec 30, 2022 · 5 min readParameter Estimation for the Multivariate t DistributionThe t distribution has long tails and is therefore robust against outliers. If we can fit a multivariate t distribution to a data set of input-output pairs, we can therefore perform outlier-robust linear regression. This post provides code that does ...00
MWMathias Winther Madsenintodayilearned.hashnode.dev·Dec 29, 2022 · 3 min readSufficient Statistics for the Multivariate GaussianThis article presents some Python code for computing the log-likelihood of a sample under a multivariate Gaussian distribution, along with the formulas used to justify the method of computation. The One-Dimensional Case The likelihood of a data set u...00
MWMathias Winther Madsenintodayilearned.hashnode.dev·Dec 24, 2022 · 4 min readHue Angles and Rotated ColorsThe HSV color model parameterizes the pure colors in terms of angles. While the idea of using an angle to select a point on a color wheel is intuitive enough, the precise mapping between angle and hues is somewhat involved. Since I recently understoo...00
MWMathias Winther Madsenintodayilearned.hashnode.dev·Dec 23, 2022 · 4 min readPeano's Space-Filling Curve: Tiles and CodePeano's space-filling curve is a uniformly continuous and surjective mapping of the unit interval onto the unit square. The curve is a fractal — it is constructed using a recursive refinement scheme that doubles its length in each iteration. Corner-t...00
