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stardust.py
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stardust.py
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"""stardust 2017/10/21~"""
import time
import json
import numpy as np
import cv2
import scipy.spatial
IMPORT_SOCKET = True
try:
from flask_socketio import emit
except ImportError:
IMPORT_SOCKET = False
SIZE = 666 # 画像サイズ(横)
class Stardust:
def __init__(self, image_name,
star_num=120,
star_depth=10,
dist_max=50, # 画像の大きさによるので固定すべきでなさそう
angle_max=5,
socket=None,
debug=False
):
global IMPORT_SOCKET
if isinstance(image_name, np.ndarray): # 画像が直接渡された場合
self.image = image_name
else:
self.image = cv2.imread(image_name)
# 小さすぎたら拡大
if max(self.image.shape[0], self.image.shape[1]) < 1200:
self.image = self.scale_down(self.image,
max(self.image.shape[0],
self.image.shape[1])/1200)
self.text_size = (1.72e-7
* self.image.shape[0]
* self.image.shape[1]
+ 1.34) # TODO:adjust!
self.text_weight = (3 if (self.image.shape[0] > 2000
and self.image.shape[1] > 2000)
else 1)
self.c_radius = int(max(self.image.shape[0], self.image.shape[1])/250)
self.l_weight = int(max(self.image.shape[0], self.image.shape[1])/1000)
self.diagonal = np.sqrt(self.image.shape[0]**2 + self.image.shape[1]**2)
self.star_num = star_num # Param:取り出す星の数
self.star_depth = star_depth # Param:近隣探索数の上限
self.dist_max = dist_max # Param:許容する距離誤差の上限
self.angle_max = angle_max # Param:許容する角度誤差の上限
self.likelihood = 0
self.written_img = self.image.copy()
if IMPORT_SOCKET:
self.socket = socket
else:
self.socket = None
self.debug = debug
# 画像の4隅
self.a = np.array([0, 0])
self.b = np.array([self.image.shape[1] - 1, 0])
self.c = np.array([self.image.shape[1] - 1, self.image.shape[0] - 1])
self.d = np.array([0, self.image.shape[0] - 1])
self.standard_list = [] # 基準(始点から検知判定まで)の星 描画時再訪問用
self.detect = None # 見つかったかどうか(探索後bool)
self.thr_min = 90
self.thr_max = 220
self.stars = self.__detect_stars()
self.tree = scipy.spatial.KDTree(self.stars)
def get_image(self):
return self.written_img
def scale_down(self, img, scale):
"""入力画像をscale分の1に縮小"""
hight = img.shape[0]
width = img.shape[1]
small = cv2.resize(img, (round(width/scale), round(hight/scale)))
return small
def darken(self, gamma):
"""ガンマ補正をかける gammma < 1で暗くなる"""
lut = np.ones((256, 1), dtype='uint8') * 0
for i in range(256):
lut[i][0] = 255 * pow(float(i) / 255, 1.0 / gamma)
image_gamma = cv2.LUT(self.image, lut)
self.image = image_gamma
def __detect_stars(self):
"""最適(?)スレッショルドを設定し、抽出した星座標のリストを返す"""
flag = True
thr = self.thr_max
# 画像から星情報(面積と座標)をget
img_gray = cv2.cvtColor(self.image, cv2.COLOR_RGB2GRAY)
self.del_img = self.image.copy()
self.first_delete = True
self.tmp_stars = []
while True:
thr, contours = self._thr_optimize(img_gray, thr)
if contours is None:
continue
areas, stars = self._get_star_info(thr, contours)
if stars is None:
thr = areas
continue
img_gray = self._delete_light_pollution(areas, stars, contours)
if img_gray is not None:
continue
else:
break
# 星のうち明るいほうから順に取り出す
r_areas_arg = np.argsort(areas)[::-1] # 面積の大きい順にインデックスをリストに格納
if len(stars) > self.star_num:
astars = [stars[r_areas_arg[i]] for i in range(self.star_num)]
else:
astars = [stars[r_areas_arg[i]] for i in range(len(stars))]
print("star num:", len(astars))
# 光害の中にまきこまれた星があれば追加しておく
for tmp_star in self.tmp_stars:
# 半径円に含まれるくらい近くに星があればそれは追加しない
flags = [True for star in astars
if np.linalg.norm(tmp_star-star) < self.c_radius]
if not (True in flags):
astars.append(tmp_star)
print("star num:", len(astars))
print("threashold:", thr)
# DEBUG
if self.debug:
tmp = self.image.copy()
for star in astars:
cv2.circle(
tmp, (star[0], star[1]), 2, (0, 0, 255), -1, cv2.LINE_AA)
for star in astars[0:10]:
cv2.circle(
tmp, (star[0], star[1]), self.c_radius, (0, 255, 0), -1, cv2.LINE_AA)
cv2.imshow("finalcnt",
self.scale_down(tmp,
max(tmp.shape[0], tmp.shape[1])/SIZE))
cv2.waitKey(1)
return astars
def on_mouse(self, event, x, y, flag, param):
"""マウスクリック時"""
# 左クリックで最近傍の星出力
if event == cv2.EVENT_LBUTTONDOWN:
print("mouse:", x, y, sep=' ', end='\n')
print(self.search_near_star([x, y]))
def search_near_star(self, p, k=1):
"""
p=(x, y)のk近傍を返す
"""
if k >= len(self.stars):
print("Can't detect")
return None
else:
dist, index = self.tree.query(p, k=k, distance_upper_bound=self.diagonal)
if k == 1:
return self.stars[index]
else:
if index[0] == len(self.stars): # 検索失敗
return [None for i in range(k)]
return [self.stars[i] for i in index]
def draw_line(self,
constellation,
mode="default",
predict_circle=False,
write_text=False):
"""
画像から見つけたすべての星について星座一致度のチェックを実行する
発見された場合,描く
"""
if type(constellation) is not list:
constellation = [constellation]
self.write_text = write_text
self.predict_circle = predict_circle
self.min_like = 0
self.best_points = {}
for cstl in constellation:
self.best_points[cstl["en_name"]] = {
"correct_probability": 0,
"std_star": None,
"second_star": None,
"line": None
}
sockcnt = 0
# 検出した星のうちself.star_num個すべてについてみていく
for star in self.stars:
if self.socket is not None:
emit('searching', {"data": sockcnt})
sockcnt += 1
self.socket.sleep(0)
self.std_star = star
# 基準星の近くのself.star_depth個をとってくる
second_candidates = self.search_near_star(
star, k=self.star_depth)
# とってきた二番目の星候補すべてについて、残りの星を探索し星座一致率を計算
for second in second_candidates:
for cstl in constellation:
self._check_constellation(star, second, cstl, mode)
if self.detect:
constellation.remove(cstl)
self.best_points.pop(cstl["en_name"])
self.detect = False
# if self.detect:
# return self.detect
else: # 全星の探索が終わった時
# 星座一致率がある程度高いものが保存されていた場合、描く
for cst_name, best_point in self.best_points.items():
if best_point["std_star"] is None:
print("failed to detect", cst_name)
self.detect = False
else:
self.std_star = best_point["std_star"]
self.second_star = best_point["second_star"]
self._draw_circle_and_line(
self.std_star, self.second_star, best_point["line"]
)
print(cst_name, "wrote.")
self.detect = True
def __search_constellation(self, count, point, bector, constellation, write=False, predict_write=False, next_one=False):
"""
再帰的に星座に一致するかみていく
args: (何番目の星か, 前の点, 前のベクトル, 星座(の一部))
"""
dist, ang = constellation["distances"][count], constellation["angles"][count]
if ang is None: # 再訪問
if write and len(self.standard_list) > dist:
re_point = self.standard_list[dist]
self.__write(point, re_point)
if count+1 == len(constellation["distances"]):
if "BP" in constellation and len(constellation["BP"]) > 0:
for (branch, rest) in zip(
constellation["BP"], constellation["rest"]):
self.__search_constellation(0,
branch,
near_predict - point,
rest,
write=write,
predict_write=predict_write
)
return self.star_count
return self.__search_constellation(count+1,
re_point,
re_point - point,
constellation,
write=write,
predict_write=predict_write
)
else:
return self.star_count
# 星座データから予測される次の星の位置をpredictに格納
predict = point + self.__rotate_bector(bector, ang) * dist
# predictの最近傍とそのつぎに近い星を取得
near_predict, else_predict = self.search_near_star(
predict.tolist()[0], k=2)
if near_predict is None:
return self.star_count
predict_diff = np.linalg.norm(near_predict - predict)
theta = self.__calc_angle(bector, near_predict - point)
if next_one: # 次の星の予測誤差を返す
return abs(abs(ang) - theta)
else_diff = np.linalg.norm(else_predict - predict)
else_theta = self.__calc_angle(bector, else_predict - point)
if (count + 1 < len(constellation["distances"])
and else_diff < self.dist_max
and abs(abs(ang) - else_theta) < self.angle_max):
# 二つの近傍の星について、その先にそれらしい星があるほうを採用する
prds = [near_predict, else_predict]
errs = [(predict_diff, theta), (else_diff, else_theta)]
angle_diffs = [
self.__search_constellation(
count+1,
e,
e-point,
constellation,
next_one=True) for e in prds]
i = np.argmin(angle_diffs)
near_predict = prds[i]
predict_diff, theta = errs[i]
# もし予想地点近くに星があれば
if (predict_diff < self.dist_max
and abs(abs(ang) - theta) < self.angle_max):
# 尤度の計算
found_bec_rate = (np.linalg.norm(near_predict - point)
/ np.linalg.norm(bector))
err = (abs(dist - found_bec_rate)
if abs(dist - found_bec_rate) < 1 else 1)
self.likelihood += 1 - err / dist
if count == 0 and (-2 in constellation["junctions"]
or -1 in constellation["junctions"]):
# 基準点、二番点の処理
for i in range(constellation["junctions"].count(-2)):
constellation["BP"].append(self.std_star)
for i in range(constellation["junctions"].count(-1)):
constellation["BP"].append(self.second_star)
if count in constellation["junctions"]: # 現在の点が分岐点なら
for i in range(constellation["junctions"].count(count)):
constellation["BP"].append(near_predict)
self.star_count += 1
if write:
if "N" in constellation:
if len(self.standard_list) == 0:
self.standard_list += [self.std_star, self.second_star]
self.standard_list.append(near_predict)
self.__write(point, near_predict)
if count+1 == len(constellation["distances"]): # 端点ならば
if "BP" in constellation and len(constellation["BP"]) > 0:
# 分岐点が存在すれば
for (branch, rest) in zip(
constellation["BP"], constellation["rest"]):
self.__search_constellation(0,
branch,
near_predict - point,
rest,
write=write,
predict_write=predict_write
)
return self.star_count
return self.__search_constellation(count+1,
near_predict,
near_predict - point,
constellation,
write=write,
predict_write=predict_write
)
elif (predict_write and write): # 予想描画機能オンのとき
predict[0, 0] = int(predict[0, 0])
predict[0, 1] = int(predict[0, 1])
predict = np.array(predict.tolist())[0]
# 予測点がはみ出すとき
if ((predict[0] < 0 or predict[0] >= self.image.shape[1])
or (predict[1] < 0 or predict[1] >= self.image.shape[0])):
# TODO: はみ出した点が分岐点だった場合の処理
managed_predict = self.__manage_cross(point, predict)
print("managed:", managed_predict)
if managed_predict is not None:
sp, ep = self.__line_adjust(point, managed_predict)
cv2.line(self.written_img,
sp,
ep,
(255, 255, 255),
self.l_weight,
cv2.LINE_AA)
if count+1 == len(constellation["distances"]): # 端点ならば
if "BP" in constellation and len(constellation["BP"]) > 0:
# 分岐点が存在すれば
for (branch, rest) in zip(
constellation["BP"], constellation["rest"]):
self.__search_constellation(0,
branch,
predict - point,
rest,
write=True,
predict_write=True
)
return self.star_count
return self.__search_constellation(count+1,
predict,
predict - point,
constellation,
write=True,
predict_write=True
)
if count == 0 and (-2 in constellation["junctions"]
or -1 in constellation["junctions"]): # 基準点、二番点の処理
for i in range(constellation["junctions"].count(-2)):
constellation["BP"].append(self.std_star)
for i in range(constellation["junctions"].count(-1)):
constellation["BP"].append(self.second_star) # なんとかしたつもり
if count in constellation["junctions"]: # 現在の点が分岐点なら
for i in range(constellation["junctions"].count(count)):
constellation["BP"].append(predict)
self.__write(point, predict, circle=self.predict_circle)
if count+1 == len(constellation["distances"]):
# 端点ならば TODO:端点いかなくても分岐点は書きたい→前の辺を参照する現状では厳しい
if len(constellation["BP"]) > 0: # 分岐点が存在すれば
for (branch, rest) in zip(
constellation["BP"], constellation["rest"]):
self.__search_constellation(0,
branch,
predict - point,
rest,
write=True,
predict_write=True
)
return self.star_count
return self.__search_constellation(count+1,
predict,
predict - point,
constellation,
write=True,
predict_write=True
)
else: # 近くに星がなければ
constellation["BP"].clear()
return self.star_count
def __line_adjust(self, start, end):
"""線分を円周の部分までで止めるような始点、終点を返す"""
b = end - start
b = b / np.linalg.norm(b)
restart = start + b * self.c_radius
b = start - end
b = b / np.linalg.norm(b)
reend = end + b * self.c_radius
return ((int(restart[0]), int(restart[1])), (int(reend[0]), int(reend[1])))
def __rotate_bector(self, bector, deg):
"""bector を deg 度だけ回転する"""
rad = np.deg2rad(deg)
cos = np.cos(rad)
sin = np.sin(rad)
R = np.matrix((
(cos, -sin),
(sin, cos)
))
return R @ bector
def __calc_angle(self, bec_a, bec_b):
"""2つのベクトルのなす角を求める"""
dot = bec_a @ bec_b
cos = dot / (np.linalg.norm(bec_a) * np.linalg.norm(bec_b))
rad = np.arccos(cos)
return np.rad2deg(rad)
def __check_cross(self, p1, p2, p3, p4):
"""ベクトル同士が交差していればTrue, else Falseを返す"""
t1 = (p1[0] - p2[0]) * (p3[1] - p1[1]) + (p1[1] - p2[1]) * (p1[0] - p3[0])
t2 = (p1[0] - p2[0]) * (p4[1] - p1[1]) + (p1[1] - p2[1]) * (p1[0] - p4[0])
t3 = (p3[0] - p4[0]) * (p1[1] - p3[1]) + (p3[1] - p4[1]) * (p3[0] - p1[0])
t4 = (p3[0] - p4[0]) * (p2[1] - p3[1]) + (p3[1] - p4[1]) * (p3[0] - p2[0])
return t1 * t2 < 0 and t3 * t4 < 0
def __write(self, previous, current, circle=True):
sp, ep = self.__line_adjust(previous, current)
cv2.line(self.written_img,
sp,
ep,
(255, 255, 255),
self.l_weight,
cv2.LINE_AA)
if circle:
cv2.circle(self.written_img,
(current[0], current[1]),
self.c_radius,
(255, 255, 255),
self.l_weight,
cv2.LINE_AA
)
def __manage_cross(self, start, end):
"""はみ出た点に対し、そこに続くような線を描くための枠上の座標を返す"""
# TODO: 外から中へのクロスへの対処
if self.__check_cross(start, end, self.a, self.b):
print("0")
a = start[1]
deg = self.__calc_angle(end - start, self.b - self.a)
if deg > 90:
deg = 180 - deg
x = a // np.tan(np.deg2rad(deg))
return np.array([start[0] - x, 0])
else:
x = a // np.tan(np.deg2rad(deg))
return np.array([start[0] + x, 0])
elif self.__check_cross(start, end, self.b, self.c):
print("1")
a = self.c[0] - start[0]
deg = self.__calc_angle(end - start, self.c - self.b)
if deg > 90:
deg = 180 - deg
x = a // np.tan(np.deg2rad(deg))
return np.array([self.b[0], start[1] - x])
else:
x = a // np.tan(np.deg2rad(deg))
return np.array([self.b[0], start[1] + x])
elif self.__check_cross(start, end, self.c, self.d):
print("2")
a = self.d[1] - start[1]
deg = self.__calc_angle(end - start, self.d - self.c)
if deg > 90:
deg = 180 - deg
x = a // np.tan(np.deg2rad(deg))
return np.array([start[0] - x, self.c[1]])
else:
x = a // np.tan(np.deg2rad(deg))
return np.array([start[0] + x, self.c[1]])
elif self.__check_cross(start, end, self.d, self.a):
print("3")
a = start[0]
deg = self.__calc_angle(end - start, self.a - self.d)
if deg > 90:
deg = 180 - deg
x = a // np.tan(np.deg2rad(deg))
return np.array([0, start[1] + x])
else:
x = a // np.tan(np.deg2rad(deg))
return np.array([0, start[1] - x])
def _thr_optimize(self, gray_img, thr):
"""
星が発見しやすい輝度スレッショルドを探す
"""
_, bin_img = cv2.threshold(gray_img, thr, 255, cv2.THRESH_BINARY)
if self.debug:
cv2.imshow("gray",
self.scale_down(bin_img,
max(bin_img.shape[0],
bin_img.shape[1])/666))
cv2.waitKey(1)
_, contours, _ = cv2.findContours(
bin_img, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)
if thr == self.thr_max:
self.first_starnum = len(contours)
if thr == self.thr_min:
return (thr, contours)
elif len(contours) < 80:
for cnt in contours:
M = cv2.moments(cnt)
if M['m00'] != 0:
cx = int(M['m10'] / M['m00'])
cy = int(M['m01'] / M['m00'])
self.tmp_stars.append(np.array([cx, cy], dtype='int32'))
else:
self.tmp_stars.append(np.array(cnt[0, 0], dtype='int32'))
thr -= 10
return (thr, None)
elif len(contours) < 400:
thr -= 10
return (thr, None)
else:
return (thr, contours)
def _get_star_info(self, thr, contours):
areas, stars = [], []
for cnt in contours:
M = cv2.moments(cnt)
areas.append(M["m00"])
if M["m00"] != 0:
cx = int(M['m10'] / M['m00'])
cy = int(M['m01'] / M['m00'])
stars.append(np.array([cx, cy], dtype='int32'))
else:
stars.append(np.array(cnt[0, 0], dtype='int32'))
if (np.median(areas) == 0 and
len(contours) < self.first_starnum * 4 and
thr != self.thr_min):
thr -= 10
return (thr, None)
return (areas, stars)
def _delete_light_pollution(self, areas, stars, contours):
"""
光害と思しき箇所を黒塗りにし,検出に反映させないようにする
"""
max_a = np.argmax(areas)
if self.first_delete:
self.first_delete = False
self.delete_count = 0
self.area_std = np.std(areas)
if self.debug:
print("std:", self.area_std)
if self.area_std > 100 and areas[max_a] > 2.5 * self.area_std:
cnt = contours[max_a]
M = cv2.moments(cnt)
cx = int(M['m10'] / M['m00'])
cy = int(M['m01'] / M['m00'])
self.tmp_stars.append(np.array([cx, cy], dtype='int32'))
self.del_img = cv2.fillConvexPoly(self.del_img, cnt, (255, 0, 0))
self.delete_count += 1
if self.delete_count > 10:
return None
img_gray = cv2.cvtColor(self.del_img, cv2.COLOR_RGB2GRAY)
if self.debug:
cv2.imshow("deleted",
self.scale_down(self.del_img, max(self.del_img.shape[0], self.del_img.shape[1])/666))
cv2.waitKey(1)
return img_gray
else:
return None
def _check_constellation(self, std_star, second_star, constellation, mode):
"""
一番目の星と二番目の星をもとに残りの星を探索、及び星座一致率を計算
一致率に従って描画を決定
一致率が一定以上高ければ描画し,中途半端なら記録しておく
7/13 時点、std_star引数は無駄
"""
if mode == "default":
line = constellation["line"]
elif mode == "iau":
line = constellation["iau"]
self.second_star = second_star
self.likelihood, self.star_count = 0, 1
ret = self.__search_constellation(
0, second_star, second_star - self.std_star, line
)
correct_probability = self.likelihood / line["max"]
if ret == line["max"] or correct_probability > 0.8: # 全部見つかったら
self.best_points[constellation["en_name"]] = {
"correct_probability": correct_probability,
"std_star": self.std_star,
"second_star": second_star,
"line": line
}
# 1つめと2つめについて描く
if self.debug:
print(
constellation["en_name"],
self.std_star,
self.star_count,
round(correct_probability * 100, 2),
"%"
)
self.star_count = 0
self._draw_circle_and_line(self.std_star, second_star, line)
print(constellation["en_name"], "wrote.")
if self.socket is not None:
emit('searching', {"data": self.star_num-1})
self.socket.sleep(0)
self.detect = True
return self.detect
elif correct_probability > 0.5:
if self.debug:
print(
constellation["en_name"],
self.std_star,
self.star_count,
round(correct_probability * 100, 2),
"%"
)
# 星座の一致率が高いものを保存しておく
if self.best_points[constellation["en_name"]]["correct_probability"] < correct_probability:
self.best_points[constellation["en_name"]] = {
"correct_probability": correct_probability,
"std_star": self.std_star,
"second_star": self.second_star,
"line": line
}
# if self.min_like < correct_probability:
# self.min_like = correct_probability
# self.best_point = [self.std_star, second_star]
elif self.debug and self.star_count > line["n"]:
print(self.std_star,
self.star_count,
round((self.likelihood / line["max"]) * 100, 2),
"%")
def _draw_circle_and_line(self, p1, p2, line):
# 一個目と二個目を描く
sp, ep = self.__line_adjust(p1, p2)
cv2.line(self.written_img,
sp,
ep,
(255, 255, 255),
self.l_weight,
cv2.LINE_AA)
for p in [p1, p2]:
cv2.circle(self.written_img,
(p[0], p[1]),
self.c_radius,
(255, 255, 255),
self.l_weight,
cv2.LINE_AA
)
# 残りを描く
self.__search_constellation(0,
p2,
p2 - p1,
line,
write=True,
predict_write=True
)
if self.write_text:
# TODO: (19/05/30)self.constellation廃止のため機能しない
pass
# cv2.putText(self.written_img,
# self.constellation["en_name"],
# (self.std_star[0] + 4 * self.c_radius,
# self.std_star[1] - 4 * self.c_radius),
# cv2.FONT_HERSHEY_SCRIPT_COMPLEX,
# self.text_size,
# (255, 255, 255),
# self.text_weight,
# cv2.LINE_AA # 太さをマネージする(星座の大きさの計算が必要…?)
# )
if __name__ == '__main__':
#test, 0004, 0038, 1499, 1618, 1614, 1916, g001 ~ g004, dzlm, dalr, daqw
IMAGE_FILE = "example_input.JPG"
# f = "source\\" + IMAGE_FILE + ".JPG"
start = time.time()
sd = Stardust(IMAGE_FILE, debug=True)
# cst = [cs.sgr, cs.sco]
with open("constellation.json") as f:
data = json.load(f)
cst = data["Scorpius"]
sd.draw_line(cst, mode="default")
#sd.draw_line(cs.sco)
end = time.time()
print("elapsed:", end - start)
print(sd.detect)
ret = sd.get_image()
cv2.namedWindow("return", cv2.WINDOW_NORMAL)
cv2.imshow("return", ret)
cv2.setMouseCallback("return", sd.on_mouse)
# cv2.imwrite(cst.short_name+"_"+IMAGE_FILE+".JPG", ret)
#cv2.imwrite("multi_"+IMAGE_FILE+".JPG", ret)
cv2.waitKey()