我的 python 脚本使用摄像头检测手指并在 PyCharm 上成功运行，但是当尝试使用 chaquopy 在 android studio 上运行它时，它给出错误摄像头未定义。我是 chaquopy 的新手，找不到与其他人类似的问题或类似的答案。
Java 代码：
public class MainActivity extends PythonConsoleActivity {
@Override protected Class<? extends Task> getTaskClass() {
return Task.class;
}
public static class Task extends PythonConsoleActivity.Task {
public Task(Application app) {
super(app);
}
@Override public void run() {
py.getModule("enders_keyboard_vision").callAttr("test");
}
}
}
蟒蛇代码：
import cv2 as cv
import numpy as np
import imutils
import time
import math
import enders_keyboard
"""import enders_keyboard_output"""
bg = None
def test():
print("Yarraaabb")
def run_avg(image, aWeight):
global bg
if bg is None:
bg = image.copy().astype("float")
return
cv.accumulateWeighted(image, bg, aWeight)
def segment(image, threshold = 10):
kernel = np.ones((5,5),np.uint8)
global bg
diff = cv.absdiff(bg.astype("uint8"), image)
thresholded = cv.threshold(diff, threshold, 255, cv.THRESH_BINARY)[1]
cv.GaussianBlur(thresholded, (11, 11), 0)
thresholded = cv.dilate(thresholded, kernel, 10)
thresh = cv.threshold(thresholded, 100, 255, cv.THRESH_BINARY)[1]
thresh = cv.erode(thresh, kernel, 20)
conts,hierarchy = cv.findContours(thresholded.copy(), cv.RETR_EXTERNAL, cv.CHAIN_APPROX_SIMPLE)
if len(conts) == 0:
return
else:
segmented = max(conts, key=cv.contourArea)
return (thresh, segmented)
def rough_hull(hull_ids, cont, max_dist):
if len(hull_ids) > 0 and len(cont) > 0:
res = []
current_pos = cont[hull_ids[0]][0][0]
points = []
for point in hull_ids:
dist = np.linalg.norm(cont[point][0][0] - current_pos)
if dist > max_dist:
res.append(point)
current_pos = cont[point][0][0]
return res
else:
return []
def get_mouse_pos(event, x, y, flags, param):
if event == cv.EVENT_LBUTTONDOWN:
print(x, y)
def vector_proj(v1, v2):
return np.multiply((np.dot(v1, v2) / np.dot(v1, v1)), v1)
def simulate_key(key):
"""enders_keyboard_output.type_key(key)"""
print("ESHTAA")
if __name__ == "__main__":
aWeight = 0.5
key_dict = {
0 : "a",
1 : "b",
2 : "c",
3 : "d",
4 : "e",
5 : "f",
6 : "g",
7 : "h",
8 : "i",
9 : "j",
10 : "k",
11 : "l",
12 : "m",
13 : "n",
14 : "o",
15 : "p",
16 : "q",
17 : "r",
18 : "s",
19 : "t",
20 : "u",
21 : "v",
22 : "w",
23 : "x",
24 : "y",
25 : "z"
}
camera = cv.VideoCapture(0)
time.sleep(1)
top, right, bottom, left = 10, 350, 350, 750
num_fingers = 0
num_frames = 0
start_points = [
(385, 235), #thumb
(425, 125), #index
(500, 105), #middle
(560, 130), #ring
(615, 210) #pinky
]
start_center = (0, 0)
current_points = start_points.copy()
act = False
last_found = [True, True, True, True, True]
while(True):
(grabbed, frame) = camera.read()
frame = imutils.resize(frame, width = 700)
frame = cv.flip(frame, 1)
(height, width) = frame.shape[:2]
roi = frame[top:bottom, right:left]
gray = cv.cvtColor(roi, cv.COLOR_BGR2GRAY)
gray = cv.GaussianBlur(gray, (5, 5), 0)
inner = [False, False, False, False, False]
outer = [False, False, False, False, False]
if num_frames < 10:
run_avg(gray, aWeight)
cv.circle(frame, (int(height / 2), int(width / 2)), 30, (0, 0, 255))
else:
cv.imshow("background", bg/255)
hand = segment(gray)
if hand is not None:
(thresholded, segmented) = hand
#if cv.countNonZero(thresholded) > ((top - bottom) * (left - right) * 0.95):
# time.sleep(0.5)
# bg = None
# num_frames = 0
#cv.drawContours(frame, [segmented + (right, top)], -1, (0, 0, 255))
convex_hull = cv.convexHull(segmented + (right, top), returnPoints = False)
hull = rough_hull(convex_hull, segmented, 40)
#remove bottom two points
#del hull[hull[0][:, :, 1].argmin()[0]]
#del hull[hull[0][:, :, 1].argmin()[1]]
if len(segmented) > 0:
hull_sorted = sorted(hull, key = lambda a : segmented[a[0]][0][1])
hull_sorted = hull_sorted[:min(len(hull_sorted), 5)]
activated = []
if act is False:
for point in range(5):
activated.append(False)
for pt in hull_sorted:
if math.hypot(start_points[point][0] - segmented[pt][0][0][0] - right, start_points[point][1] - segmented[pt][0][0][1]) < 25:
activated[point] = True
cv.circle(frame, (start_points[point][0], start_points[point][1]), 30, (255, 0, 0), thickness = -1 if activated[point] else 1)
num_fingers = 0
for active in activated:
if active is True:
num_fingers += 1
if num_fingers >= 5:
print("act")
act = True
m = cv.moments(segmented)
start_center = (int(m["m10"] / m["m00"]) + right, int(m["m01"] / m["m00"]) + top)
else:
m = cv.moments(segmented)
current_center = (int(m["m10"] / m["m00"]) + right, int(m["m01"] / m["m00"]) + top)
center_diff = np.subtract(current_center, start_center)
for point in range(len(start_points)):
start_points[point] = np.add(start_points[point], center_diff)
start_center = current_center
thumb_inner = False
thumb_outer = False
found = [False, False, False, False, False]
for point in range(5):
vect = [start_points[point][0] - current_center[0], start_points[point][1] - current_center[1]]
mag = math.sqrt(vect[0]**2 + vect[1]**2)
inner[point] = False
outer[point] = False
for pt in hull_sorted:
if math.hypot(current_points[point][0] - segmented[pt][0][0][0] - right, current_points[point][1] - segmented[pt][0][0][1]) < 20 and math.hypot(start_points[point][0] - segmented[pt][0][0][0] - right, start_points[point][1] - segmented[pt][0][0][1]) < 40:
current_points[point] = (segmented[pt][0][0][0] + right, segmented[pt][0][0][1])
diff = np.subtract((current_points[point][0], current_points[point][1]), start_points[point])
adjusted_pt = np.add(start_points[point], vector_proj(vect, diff))
cv.circle(frame, (int(adjusted_pt[0]), int(adjusted_pt[1])), 30, (255, 0, 0), thickness = -1)
found[point] = True
if (not found[point]) and found[point] is not last_found[point]:
d = math.hypot(current_points[point][0] - current_center[0], current_points[point][1] - current_center[1])
current_points[point] = start_points[point]
if d < mag:
inner[point] = True
outer[point] = False
else:
inner[point] = False
outer[point] = True
cv.circle(frame, (current_points[point][0], current_points[point][1]), 25, (255, 0, 255))
last_found[point] = found[point]
cv.circle(frame, (start_points[point][0], start_points[point][1]), 30, (0, 255, 0), thickness = 1)
cv.line(frame, (start_points[point][0], start_points[point][1]), (int(start_points[point][0] + vect[0] * 15 / mag), int(start_points[point][1] + vect[1] * 15 / mag)), (0, 255, 0), thickness = 1)
cv.circle(frame, current_center, 25, (0, 0, 255))
thumb_dist = math.hypot(current_points[0][0] - current_center[0], current_points[0][1] - current_center[1])
thumb_vect = [start_points[0][0] - start_center[0], start_points[0][1] - start_center[1]]
thumb_mag = math.sqrt(vect[0]**2 + vect[1]**2)
if thumb_dist - thumb_mag < -15:
thumb_inner = True
thumb_outer = False
elif thumb_dist - thumb_mag > 15:
thumb_outer = True
thumb_inner = False
for finger in range(len(inner)):
if inner[finger] is True:
simulate_key(key_dict[(8 if thumb_inner else (16 if thumb_outer else 0)) + finger * 2])
elif outer[finger] is True:
simulate_key(key_dict[(8 if thumb_inner else (16 if thumb_outer else 0)) + finger * 2 + 1])
#cv.drawContours(frame, [cv.convexHull(segmented + (right, top), segmented, 5)], -1, (0, 0, 255))
cv.imshow("Thresholded", thresholded)
cv.rectangle(frame, (left, top), (right, bottom), (0, 255, 0), 2)
num_frames += 1
cv.setMouseCallback("Video Feed", get_mouse_pos)
cv.imshow("Video Feed", frame)
keypress = cv.waitKey(10) & 0xFF
if keypress == ord("q"):
break
if keypress == ord("r"):
num_frames = 0
start_points = [
(385, 235), #thumb
(425, 125), #index
(500, 105), #middle
(560, 130), #ring
(615, 210) #pinky
]
act = False
bg = None
time.sleep(0.1)
if keypress == ord("s"):
enders_keyboard.search(num_fingers)
camera.release()
cv.destroyAllWindows()
错误 ：
com.chaquo.python.PyException: NameError: name 'camera' is not defined at .enders_keyboard_vision.(enders_keyboard_vision.py:262) at .importlib._bootstrap._call_with_frames_removed(:219) at .importlib._bootstrap_external.exec_module(:783)在 .importlib._bootstrap._load_unlocked(:671) 在 .importlib._bootstrap._find_and_load_unlocked(:975) 在 .importlib._bootstrap._find_and_load(:991) 在 .importlib._bootstrap._gcd_import(:1014) 在 .importlib.import_module( init .py:127) at .chaquopy_java.Java_com_chaquo_python_Python_getModule(chaquopy_java.pyx:153) at com.chaquo.python.Python.getModule(Native Method) at com.chaquo.python.console.MainActivity$Task.run(MainActivity.java :21) 在 com.chaquo.python.utils.ConsoleActivity$Task$1.run(ConsoleActivity.java:359)