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python Programming Glossary: gradientPlotting a curve with equidistant (arc-length) markers http://stackoverflow.com/questions/17406758/plotting-a-curve-with-equidistant-arc-length-markers data_ratio is None data_ratio plt.gca .get_data_ratio dydx gradient y x 1 dxdx gradient x x 1 data_ratio arclength scipy.integrate.cumtrapz.. plt.gca .get_data_ratio dydx gradient y x 1 dxdx gradient x x 1 data_ratio arclength scipy.integrate.cumtrapz sqrt dydx..
How can I quantify difference between two images? http://stackoverflow.com/questions/189943/how-can-i-quantify-difference-between-two-images can apply edge detection algorithm first e.g. calculate gradient with Sobel or Prewitt transform apply some threshold then compare..
How to create a simple Gradient Descent algorithm http://stackoverflow.com/questions/3837692/how-to-create-a-simple-gradient-descent-algorithm simple machine learning algorithms beginning with a simple gradient descent but i've got some trouble trying to implement it in.. 1000 s 400 i'm trying to do a simple regression using the gradient descent method but my algorithm won't work... The form of the.. least 3 data points preferably much higher. Secondly using gradient descent where the step size is a scaled version of the gradient..
Color matplotlib plot_surface command with surface gradient http://stackoverflow.com/questions/6539944/color-matplotlib-plot-surface-command-with-surface-gradient matplotlib plot_surface command with surface gradient I would like to convert surf command from MATLAB to plot_surface.. function in plot_surface command to color the surface with gradient. Here is the matlab script Matlab Commands x 5 .25 5 y x x y.. 5 y x x y meshgrid x R sqrt x.^2 y.^2 Z sin R surf x y Z gradient Z The figure from such a command can be found here. http www.mathworks.com..
Robust Hand Detection via Computer Vision http://stackoverflow.com/questions/8593091/robust-hand-detection-via-computer-vision the histogram method. You can adapt it to consider local gradient as well i.e. histogram of gradients but possibly not going to.. it to consider local gradient as well i.e. histogram of gradients but possibly not going to the full extent of Dalal and Trigg's..
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