Phobrain
Image Analysis 2 - Angles in Picture Space
Results for various image analysis methods applied
to photos by Bill, Elle, Ellen, and Raf&Skot (N~15000).
Image distance analysis.
Distributions of picture-picture angles
Angles are for difference with respect to the average over all the photos, unless otherwise specified.
2D: 'ab' coordinates of average Lab color (difference vector)
![](gallery/graph_ab_angle_distr.jpg)
2D: 'ab' coordinates of average Lab color (difference/origin)
![](gallery/graph_ab_diff_angle_distr.jpg)
2D: 'ab' coordinates of average Lab color
![](gallery/graph_angle_ab_ctr_dist.jpg)
3D: coordinates of average RGB color (difference/origin)
![](gallery/graph_rgb_angle_distr.jpg)
3D: coordinates of average RGB color
![](gallery/graph_rgb_angle_avg_ctr_distr.jpg)
4D: Lab 'ab' 2x2 histogram
![](gallery/graph_ab2x2_angle_dist.jpg)
4D: Hue*Saturation 2x2 histogram
(A 2-bin histogram for hue angle is meaningless for practical purposes, but interesting to compare.)
![](gallery/graph_hs2_angle_distr.jpg)
8D: RGB 2x2x2 histogram
![](gallery/graph_rgb2_angle_distr.jpg)
27D: RGB 3x3x3 histogram
![](gallery/graph_rgb3_angle_distr.jpg)
64D: RGB 4x4x4 histogram
![](gallery/graph_rgb4_angle_distr.jpg)
1,728D: RGB 12x12x12 histogram
![](gallery/graph_rgb12_angle_distr.jpg)
13,824D: RGB 24x24x24 histogram
![](gallery/graph_rgb24_angle_distr.jpg)
32,768D: RGB 32x32x32 histogram
![](gallery/graph_rgb32_angle_distr.jpg)
256D: greyscale histogram
![](gallery/graph_grey_angle_distr.jpg)
578D: Hue*Saturation 24x24 histogram
![](gallery/graph_hs24_angle_distr.jpg)
Software
Lab conversion and distance from formulae on web.
Hue+Sat histograms, Sift, Hog, Surf from BoofCV, Sift/Hog/Surf using a KNN classifier.
Gist distance from OpenIMAJ.
Fractal analysis from IQM.
MultiDimensional Scaling from scikit-learn.
What use to cry for Capricorn? it sails
Across the heart's red atlas: it is found
Only within the ribs, where all the tails
The tempest has are whisking it around.
— Mervyn Peake, Titus Alone