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/doc/pattern_tools/README.txt

@@ -0,0 +1,4 @@
+use
+python gen_pattern.py --help
+
+to generate various calibration svg calibration patterns.

3rdparty/opencv-4.5.4/doc/pattern_tools/gen_pattern.py

@@ -0,0 +1,217 @@
+#!/usr/bin/env python
+
+"""gen_pattern.py
+Usage example:
+python gen_pattern.py -o out.svg -r 11 -c 8 -T circles -s 20.0 -R 5.0 -u mm -w 216 -h 279
+-o, --output - output file (default out.svg)
+-r, --rows - pattern rows (default 11)
+-c, --columns - pattern columns (default 8)
+-T, --type - type of pattern, circles, acircles, checkerboard, radon_checkerboard (default circles)
+-s, --square_size - size of squares in pattern (default 20.0)
+-R, --radius_rate - circles_radius = square_size/radius_rate (default 5.0)
+-u, --units - mm, inches, px, m (default mm)
+-w, --page_width - page width in units (default 216)
+-h, --page_height - page height in units (default 279)
+-a, --page_size - page size (default A4), supersedes -h -w arguments
+-m, --markers - list of cells with markers for the radon checkerboard
+-H, --help - show help
+"""
+
+import argparse
+
+from svgfig import *
+
+
+class PatternMaker:
+    def __init__(self, cols, rows, output, units, square_size, radius_rate, page_width, page_height, markers):
+        self.cols = cols
+        self.rows = rows
+        self.output = output
+        self.units = units
+        self.square_size = square_size
+        self.radius_rate = radius_rate
+        self.width = page_width
+        self.height = page_height
+        self.markers = markers
+        self.g = SVG("g")  # the svg group container
+
+    def make_circles_pattern(self):
+        spacing = self.square_size
+        r = spacing / self.radius_rate
+        pattern_width = ((self.cols - 1.0) * spacing) + (2.0 * r)
+        pattern_height = ((self.rows - 1.0) * spacing) + (2.0 * r)
+        x_spacing = (self.width - pattern_width) / 2.0
+        y_spacing = (self.height - pattern_height) / 2.0
+        for x in range(0, self.cols):
+            for y in range(0, self.rows):
+                dot = SVG("circle", cx=(x * spacing) + x_spacing + r,
+                          cy=(y * spacing) + y_spacing + r, r=r, fill="black", stroke="none")
+                self.g.append(dot)
+
+    def make_acircles_pattern(self):
+        spacing = self.square_size
+        r = spacing / self.radius_rate
+        pattern_width = ((self.cols-1.0) * 2 * spacing) + spacing + (2.0 * r)
+        pattern_height = ((self.rows-1.0) * spacing) + (2.0 * r)
+        x_spacing = (self.width - pattern_width) / 2.0
+        y_spacing = (self.height - pattern_height) / 2.0
+        for x in range(0, self.cols):
+            for y in range(0, self.rows):
+                dot = SVG("circle", cx=(2 * x * spacing) + (y % 2)*spacing + x_spacing + r,
+                          cy=(y * spacing) + y_spacing + r, r=r, fill="black", stroke="none")
+                self.g.append(dot)
+
+    def make_checkerboard_pattern(self):
+        spacing = self.square_size
+        xspacing = (self.width - self.cols * self.square_size) / 2.0
+        yspacing = (self.height - self.rows * self.square_size) / 2.0
+        for x in range(0, self.cols):
+            for y in range(0, self.rows):
+                if x % 2 == y % 2:
+                    square = SVG("rect", x=x * spacing + xspacing, y=y * spacing + yspacing, width=spacing,
+                                 height=spacing, fill="black", stroke="none")
+                    self.g.append(square)
+
+    @staticmethod
+    def _make_round_rect(x, y, diam, corners=("right", "right", "right", "right")):
+        rad = diam / 2
+        cw_point = ((0, 0), (diam, 0), (diam, diam), (0, diam))
+        mid_cw_point = ((0, rad), (rad, 0), (diam, rad), (rad, diam))
+        res_str = "M{},{} ".format(x + mid_cw_point[0][0], y + mid_cw_point[0][1])
+        n = len(cw_point)
+        for i in range(n):
+            if corners[i] == "right":
+                res_str += "L{},{} L{},{} ".format(x + cw_point[i][0], y + cw_point[i][1],
+                                                   x + mid_cw_point[(i + 1) % n][0], y + mid_cw_point[(i + 1) % n][1])
+            elif corners[i] == "round":
+                res_str += "A{},{} 0,0,1 {},{} ".format(rad, rad, x + mid_cw_point[(i + 1) % n][0],
+                                                        y + mid_cw_point[(i + 1) % n][1])
+            else:
+                raise TypeError("unknown corner type")
+        return res_str
+
+    def _get_type(self, x, y):
+        corners = ["right", "right", "right", "right"]
+        is_inside = True
+        if x == 0:
+            corners[0] = "round"
+            corners[3] = "round"
+            is_inside = False
+        if y == 0:
+            corners[0] = "round"
+            corners[1] = "round"
+            is_inside = False
+        if x == self.cols - 1:
+            corners[1] = "round"
+            corners[2] = "round"
+            is_inside = False
+        if y == self.rows - 1:
+            corners[2] = "round"
+            corners[3] = "round"
+            is_inside = False
+        return corners, is_inside
+
+    def make_radon_checkerboard_pattern(self):
+        spacing = self.square_size
+        xspacing = (self.width - self.cols * self.square_size) / 2.0
+        yspacing = (self.height - self.rows * self.square_size) / 2.0
+        for x in range(0, self.cols):
+            for y in range(0, self.rows):
+                if x % 2 == y % 2:
+                    corner_types, is_inside = self._get_type(x, y)
+                    if is_inside:
+                        square = SVG("rect", x=x * spacing + xspacing, y=y * spacing + yspacing, width=spacing,
+                                     height=spacing, fill="black", stroke="none")
+                    else:
+                        square = SVG("path", d=self._make_round_rect(x * spacing + xspacing, y * spacing + yspacing,
+                                                                     spacing, corner_types), fill="black", stroke="none")
+                    self.g.append(square)
+        if self.markers is not None:
+            r = self.square_size * 0.17
+            pattern_width = ((self.cols - 1.0) * spacing) + (2.0 * r)
+            pattern_height = ((self.rows - 1.0) * spacing) + (2.0 * r)
+            x_spacing = (self.width - pattern_width) / 2.0
+            y_spacing = (self.height - pattern_height) / 2.0
+            for x, y in self.markers:
+                color = "black"
+                if x % 2 == y % 2:
+                    color = "white"
+                dot = SVG("circle", cx=(x * spacing) + x_spacing + r,
+                          cy=(y * spacing) + y_spacing + r, r=r, fill=color, stroke="none")
+                self.g.append(dot)
+
+    def save(self):
+        c = canvas(self.g, width="%d%s" % (self.width, self.units), height="%d%s" % (self.height, self.units),
+                   viewBox="0 0 %d %d" % (self.width, self.height))
+        c.save(self.output)
+
+
+def main():
+    # parse command line options
+    parser = argparse.ArgumentParser(description="generate camera-calibration pattern", add_help=False)
+    parser.add_argument("-H", "--help", help="show help", action="store_true", dest="show_help")
+    parser.add_argument("-o", "--output", help="output file", default="out.svg", action="store", dest="output")
+    parser.add_argument("-c", "--columns", help="pattern columns", default="8", action="store", dest="columns",
+                        type=int)
+    parser.add_argument("-r", "--rows", help="pattern rows", default="11", action="store", dest="rows", type=int)
+    parser.add_argument("-T", "--type", help="type of pattern", default="circles", action="store", dest="p_type",
+                        choices=["circles", "acircles", "checkerboard", "radon_checkerboard"])
+    parser.add_argument("-u", "--units", help="length unit", default="mm", action="store", dest="units",
+                        choices=["mm", "inches", "px", "m"])
+    parser.add_argument("-s", "--square_size", help="size of squares in pattern", default="20.0", action="store",
+                        dest="square_size", type=float)
+    parser.add_argument("-R", "--radius_rate", help="circles_radius = square_size/radius_rate", default="5.0",
+                        action="store", dest="radius_rate", type=float)
+    parser.add_argument("-w", "--page_width", help="page width in units", default=argparse.SUPPRESS, action="store",
+                        dest="page_width", type=float)
+    parser.add_argument("-h", "--page_height", help="page height in units", default=argparse.SUPPRESS, action="store",
+                        dest="page_height", type=float)
+    parser.add_argument("-a", "--page_size", help="page size, superseded if -h and -w are set", default="A4",
+                        action="store", dest="page_size", choices=["A0", "A1", "A2", "A3", "A4", "A5"])
+    parser.add_argument("-m", "--markers", help="list of cells with markers for the radon checkerboard. Marker "
+                                                "coordinates as list of numbers: -m 1 2 3 4 means markers in cells "
+                                                "[1, 2] and [3, 4]",
+                        action="store", dest="markers", nargs="+", type=int)
+    args = parser.parse_args()
+
+    show_help = args.show_help
+    if show_help:
+        parser.print_help()
+        return
+    output = args.output
+    columns = args.columns
+    rows = args.rows
+    p_type = args.p_type
+    units = args.units
+    square_size = args.square_size
+    radius_rate = args.radius_rate
+    if 'page_width' and 'page_height' in args:
+        page_width = args.page_width
+        page_height = args.page_height
+    else:
+        page_size = args.page_size
+        # page size dict (ISO standard, mm) for easy lookup. format - size: [width, height]
+        page_sizes = {"A0": [840, 1188], "A1": [594, 840], "A2": [420, 594], "A3": [297, 420], "A4": [210, 297],
+                      "A5": [148, 210]}
+        page_width = page_sizes[page_size][0]
+        page_height = page_sizes[page_size][1]
+    if len(args.markers) % 2 == 1:
+        raise ValueError("The length of the markers array={} must be even".format(len(args.markers)))
+    markers = set()
+    for x, y in zip(args.markers[::2], args.markers[1::2]):
+        if x in range(0, columns) and y in range(0, rows):
+            markers.add((x, y))
+        else:
+            raise ValueError("The marker {},{} is outside the checkerboard".format(x, y))
+
+    pm = PatternMaker(columns, rows, output, units, square_size, radius_rate, page_width, page_height, markers)
+    # dict for easy lookup of pattern type
+    mp = {"circles": pm.make_circles_pattern, "acircles": pm.make_acircles_pattern,
+          "checkerboard": pm.make_checkerboard_pattern, "radon_checkerboard": pm.make_radon_checkerboard_pattern}
+    mp[p_type]()
+    # this should save pattern to output
+    pm.save()
+
+
+if __name__ == "__main__":
+    main()