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/tst_scene_render.py

@@ -0,0 +1,121 @@
+#!/usr/bin/env python
+
+
+# Python 2/3 compatibility
+from __future__ import print_function
+
+import numpy as np
+import cv2 as cv
+
+from numpy import pi, sin, cos
+
+
+defaultSize = 512
+
+class TestSceneRender():
+
+    def __init__(self, bgImg = None, fgImg = None,
+        deformation = False, speed = 0.25, **params):
+        self.time = 0.0
+        self.timeStep = 1.0 / 30.0
+        self.foreground = fgImg
+        self.deformation = deformation
+        self.speed = speed
+
+        if bgImg is not None:
+            self.sceneBg = bgImg.copy()
+        else:
+            self.sceneBg = np.zeros(defaultSize, defaultSize, np.uint8)
+
+        self.w = self.sceneBg.shape[0]
+        self.h = self.sceneBg.shape[1]
+
+        if fgImg is not None:
+            self.foreground = fgImg.copy()
+            self.center = self.currentCenter = (int(self.w/2 - fgImg.shape[0]/2), int(self.h/2 - fgImg.shape[1]/2))
+
+            self.xAmpl = self.sceneBg.shape[0] - (self.center[0] + fgImg.shape[0])
+            self.yAmpl = self.sceneBg.shape[1] - (self.center[1] + fgImg.shape[1])
+
+        self.initialRect = np.array([ (self.h/2, self.w/2), (self.h/2, self.w/2 + self.w/10),
+         (self.h/2 + self.h/10, self.w/2 + self.w/10), (self.h/2 + self.h/10, self.w/2)]).astype(int)
+        self.currentRect = self.initialRect
+
+    def getXOffset(self, time):
+        return int( self.xAmpl*cos(time*self.speed))
+
+
+    def getYOffset(self, time):
+        return int(self.yAmpl*sin(time*self.speed))
+
+    def setInitialRect(self, rect):
+        self.initialRect = rect
+
+    def getRectInTime(self, time):
+
+        if self.foreground is not None:
+            tmp = np.array(self.center) + np.array((self.getXOffset(time), self.getYOffset(time)))
+            x0, y0 = tmp
+            x1, y1 = tmp + self.foreground.shape[0:2]
+            return np.array([y0, x0, y1, x1])
+        else:
+            x0, y0 = self.initialRect[0] + np.array((self.getXOffset(time), self.getYOffset(time)))
+            x1, y1 = self.initialRect[2] + np.array((self.getXOffset(time), self.getYOffset(time)))
+            return np.array([y0, x0, y1, x1])
+
+    def getCurrentRect(self):
+
+        if self.foreground is not None:
+
+            x0 = self.currentCenter[0]
+            y0 = self.currentCenter[1]
+            x1 = self.currentCenter[0] + self.foreground.shape[0]
+            y1 = self.currentCenter[1] + self.foreground.shape[1]
+            return np.array([y0, x0, y1, x1])
+        else:
+            x0, y0 = self.currentRect[0]
+            x1, y1 = self.currentRect[2]
+            return np.array([x0, y0, x1, y1])
+
+    def getNextFrame(self):
+        img = self.sceneBg.copy()
+
+        if self.foreground is not None:
+            self.currentCenter = (self.center[0] + self.getXOffset(self.time), self.center[1] + self.getYOffset(self.time))
+            img[self.currentCenter[0]:self.currentCenter[0]+self.foreground.shape[0],
+             self.currentCenter[1]:self.currentCenter[1]+self.foreground.shape[1]] = self.foreground
+        else:
+            self.currentRect = self.initialRect + np.int( 30*cos(self.time*self.speed) + 50*sin(self.time*self.speed))
+            if self.deformation:
+                self.currentRect[1:3] += int(self.h/20*cos(self.time))
+            cv.fillConvexPoly(img, self.currentRect, (0, 0, 255))
+
+        self.time += self.timeStep
+        return img
+
+    def resetTime(self):
+        self.time = 0.0
+
+
+def main():
+    backGr = cv.imread(cv.samples.findFile('graf1.png'))
+    fgr = cv.imread(cv.samples.findFile('box.png'))
+
+    render = TestSceneRender(backGr, fgr)
+
+    while True:
+
+        img = render.getNextFrame()
+        cv.imshow('img', img)
+
+        ch = cv.waitKey(3)
+        if  ch == 27:
+            break
+
+    print('Done')
+
+
+if __name__ == '__main__':
+    print(__doc__)
+    main()
+    cv.destroyAllWindows()