def centralPixelTangentCalculation_bruteForce(img, row, col, sigma, L, M):
height, width = img.shape
windowHeight, windowWidth, inita, initb = _utils.getRanges_for_window_with_adjust(
row, col, height, width, L)
sum = 0.0
for a in range(windowHeight + 1):
for b in range(windowWidth + 1):
truea = inita + a
trueb = initb + b
sum += math.fabs(math.tanh(sigma * (img[truea][trueb] - M)))
return sum / pow(L, 2)
def centralPixelTangentCalculation_bruteForce(img, copy, row, col, alpha, L):
height, width = img.shape
windowHeight, windowWidth, inita, initb = \
_utils.getRanges_for_window_with_adjust(row, col, height, width, L)
sum = 0.0
for a in range(windowHeight + 1):
for b in range(windowWidth + 1):
truea = inita + a
trueb = initb + b
sum += math.fabs(math.tanh(alpha * (img[truea][trueb])))
copy[row][col] = sum / pow(L, 2)
def centralPixelMomentCalculation(img, row, col, W, p, q):
m_pq = 0.0
height, width = img.shape
windowHeight, windowWidth, initm, initn = _utils.getRanges_for_window_with_adjust(
row, col, height, width, W)
for m in range(windowHeight + 1):
for n in range(windowWidth + 1):
truem = initm + m
truen = initn + n
x_m = (truem - row) / math.floor(W / 2)
y_n = (truen - col) / math.floor(W / 2)
x_m_p = pow((x_m), p)
y_n_p = pow((y_n), q)
m_pq += (img[truem][truen] * x_m_p * y_n_p)
return m_pq
