Binarize photo data with OpenCV

I researched because I wanted to convert the photo data into black and white binary and input it to Blender.

The following sample program is used as a reference.

python - Converting an OpenCV Image to Black and White - Stack Overflow

Display binarized file

import cv as cv1
import cv2 as cv
import numpy as np
import sys

argvs = sys.argv

#Photo file
src = argvs[1]
#output data
output = argvs[2] 

im_gray = cv.imread(src, cv.CV_LOAD_IMAGE_GRAYSCALE)
im_gray_mat = cv1.fromarray(im_gray)
im_bw = cv1.CreateImage(cv1.GetSize(im_gray_mat), cv1.IPL_DEPTH_8U, 1)
im_bw_mat = cv1.GetMat(im_bw)

threshold = 0
cv1.Threshold(im_gray_mat, im_bw_mat, threshold, 255, cv1.CV_THRESH_BINARY | cv1.CV_THRESH_OTSU)

cv.imshow('gray image', np.asarray(im_bw_mat))
cv.waitKey(0)
cv.destroyAllWindows()

Data output of binarized matrix with savetxt

import cv as cv1
import cv2 as cv
import numpy as np
import sys

argvs = sys.argv

src = argvs[1] 
output = argvs[2]

im_gray = cv.imread(src, cv.CV_LOAD_IMAGE_GRAYSCALE)
im_gray_mat = cv1.fromarray(im_gray)
im_bw = cv1.CreateImage(cv1.GetSize(im_gray_mat), cv1.IPL_DEPTH_8U, 1)
im_bw_mat = cv1.GetMat(im_bw)

threshold = 0
cv1.Threshold(im_gray_mat, im_bw_mat, threshold, 255, cv1.CV_THRESH_BINARY | cv1.CV_THRESH_OTSU)

print np.asarray(im_bw_mat)
a = np.asarray(im_bw_mat)

np.savetxt(output, a, fmt='%10.5f', delimiter='\t')

I felt that I would need linear algebra.

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