feat: 切换后端至PaddleOCR-NCNN，切换工程为CMake

1.项目后端整体迁移至PaddleOCR-NCNN算法，已通过基本的兼容性测试
2.工程改为使用CMake组织，后续为了更好地兼容第三方库，不再提供QMake工程
3.重整权利声明文件，重整代码工程，确保最小化侵权风险

Log: 切换后端至PaddleOCR-NCNN，切换工程为CMake
Change-Id: I4d5d2c5d37505a4a24b389b1a4c5d12f17bfa38c

3rdparty/opencv-4.5.4/samples/python/turing.py

@@ -0,0 +1,81 @@
+#!/usr/bin/env python
+
+'''
+Multiscale Turing Patterns generator
+====================================
+
+Inspired by http://www.jonathanmccabe.com/Cyclic_Symmetric_Multi-Scale_Turing_Patterns.pdf
+'''
+
+# Python 2/3 compatibility
+from __future__ import print_function
+import sys
+PY3 = sys.version_info[0] == 3
+
+if PY3:
+    xrange = range
+
+import numpy as np
+import cv2 as cv
+from common import draw_str
+import getopt, sys
+from itertools import count
+
+help_message = '''
+USAGE: turing.py [-o <output.avi>]
+
+Press ESC to stop.
+'''
+
+def main():
+    print(help_message)
+
+    w, h = 512, 512
+
+    args, _args_list = getopt.getopt(sys.argv[1:], 'o:', [])
+    args = dict(args)
+    out = None
+    if '-o' in args:
+        fn = args['-o']
+        out = cv.VideoWriter(args['-o'], cv.VideoWriter_fourcc(*'DIB '), 30.0, (w, h), False)
+        print('writing %s ...' % fn)
+
+    a = np.zeros((h, w), np.float32)
+    cv.randu(a, np.array([0]), np.array([1]))
+
+    def process_scale(a_lods, lod):
+        d = a_lods[lod] - cv.pyrUp(a_lods[lod+1])
+        for _i in xrange(lod):
+            d = cv.pyrUp(d)
+        v = cv.GaussianBlur(d*d, (3, 3), 0)
+        return np.sign(d), v
+
+    scale_num = 6
+    for frame_i in count():
+        a_lods = [a]
+        for i in xrange(scale_num):
+            a_lods.append(cv.pyrDown(a_lods[-1]))
+        ms, vs = [], []
+        for i in xrange(1, scale_num):
+            m, v = process_scale(a_lods, i)
+            ms.append(m)
+            vs.append(v)
+        mi = np.argmin(vs, 0)
+        a += np.choose(mi, ms) * 0.025
+        a = (a-a.min()) / a.ptp()
+
+        if out:
+            out.write(a)
+        vis = a.copy()
+        draw_str(vis, (20, 20), 'frame %d' % frame_i)
+        cv.imshow('a', vis)
+        if cv.waitKey(5) == 27:
+            break
+
+    print('Done')
+
+
+if __name__ == '__main__':
+    print(__doc__)
+    main()
+    cv.destroyAllWindows()