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python Programming Glossary: np.uint8Numpy/Python: Array iteration without for-loop http://stackoverflow.com/questions/13805286/numpy-python-array-iteration-without-for-loop # generate 2d data a np.array np.random.rand 5 5 10 dtype np.uint8 # check all neighbours for ax in range len a.shape for i in..
How to update image in tkinter label? http://stackoverflow.com/questions/14291434/how-to-update-image-in-tkinter-label Negative Menu callback I2 255 self.I im Image.fromarray np.uint8 I2 photo2 ImageTk.PhotoImage im self.label2.image photo2 # keep..
Python 32-bit memory limits on 64bit windows http://stackoverflow.com/questions/18282867/python-32-bit-memory-limits-on-64bit-windows data 'arr_0' is of type np.float32 and 'arr_1' is of type np.uint8 The python script reads each file appends their data into two..
Why is numpy's einsum faster than numpy's built in functions? http://stackoverflow.com/questions/18365073/why-is-numpys-einsum-faster-than-numpys-built-in-functions consider the following In 1 x 255 np.ones 100 dtype np.uint8 In 2 x Out 2 array 255 255 255 255 255 255 255 255 255 255 255..
2d convolution using python and numpy http://stackoverflow.com/questions/2448015/2d-convolution-using-python-and-numpy nc data c np.convolve data c H_c 'same' data data.astype np.uint8 It does not produce the output that I was expecting does this..
How do I pass large numpy arrays between python subprocesses without saving to disk? http://stackoverflow.com/questions/5033799/how-do-i-pass-large-numpy-arrays-between-python-subprocesses-without-saving-to-d if __name__ '__main__' N 10 arr shm.zeros N dtype np.uint8 q mp.JoinableQueue proc mp.Process target worker args q arr..
Efficient method of calculating density of irregularly spaced points http://stackoverflow.com/questions/6652671/efficient-method-of-calculating-density-of-irregularly-spaced-points xl yl xi yi dfactor zz np.empty len xi len yi dtype np.uint8 zipped zip xl yl kdtree KDTree zipped for xci in range 0 len.. time.clock t0 sec cmap cm.jet A cmap zd 256.0 255 .astype np.uint8 #A 3 zd plt.imshow A origin 'lower' extent view_xmin view_xmax..
Performance comparison of OpenCV-Python interfaces, cv and cv2 http://stackoverflow.com/questions/9357696/performance-comparison-of-opencv-python-interfaces-cv-and-cv2 0 height width gray.shape h np.empty height width 3 np.uint8 t time.time for i in xrange height for j in xrange width k gray.item.. 0 255 i else palette.append i 0 0 palette np.array palette np.uint8 h2 palette gray print time.time t print np.all h h2 The output..
Simple Digit Recognition OCR in OpenCV-Python http://stackoverflow.com/questions/9413216/simple-digit-recognition-ocr-in-opencv-python im cv2.imread 'pi.png' out np.zeros im.shape np.uint8 gray cv2.cvtColor im cv2.COLOR_BGR2GRAY thresh cv2.adaptiveThreshold..
http://stackoverflow.com/questions/9860667/writing-robust-color-and-size-invariant-circle-detection-with-opencv-based-on 2 l_red 1 cv2.CV_AA h w orig.shape 2 vis np.zeros h w 2 5 np.uint8 vis cv2.cvtColor vis cv2.COLOR_GRAY2BGR vis h w orig vis h w..
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