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stefanocoding/draw_curve.py

Created October 5, 2017 12:50
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Plot curve using OpenCV instead of Matplotlib's plot().
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draw_curve.py
# If you have something like this
matplotlib.pyplot.plot(x_values, y_values, color='yellow')
# You can do the same on OpenCV like this
curve = numpy.column_stack((x_values.astype(numpy.int32), y_values.astype(numpy.int32)))
cv2.polylines(image, [curve], False, (0,255,255))
# And if you need to plot more curves just add them as an element to the array of polygonal curves
curve1 = numpy.column_stack((x1.astype(numpy.int32), y1.astype(numpy.int32)))
curve2 = numpy.column_stack((x2.astype(numpy.int32), y2.astype(numpy.int32)))
cv2.polylines(image, [curve1, curve2], False, (0,255,255))
# More information http://docs.opencv.org/2.4/modules/core/doc/drawing_functions.html#polylines
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