[英]How to fix "SystemError: <built-in function 'name'> returned NULL without setting an error" in Python C Extension
[英]SystemError: <built-in function putText> returned NULL without setting an error
當我嘗試使用以下代碼檢測產品對象和那些名稱時。 在這里,我使用的是 cv2.putText() function,但出現以下錯誤。 誰能幫幫我。
from cProfile import label
from tkinter import font
import cv2
import numpy as np
net = cv2.dnn.readNet("yolov3.weights", "yolov3.cfg")
classes = []
with open("coco.names", "r") as f:
classes = [line.strip() for line in f.readlines()]
#print(classes)
layer_names = net.getLayerNames()
output_layers = [layer_names[i[0] -1] for i in net.getUnconnectedOutLayers()]
img = cv2.imread("amz.jpg")
img = cv2.resize(img, None, fx=0.9, fy=0.9)
height, width, channels = img.shape
blob = cv2.dnn.blobFromImage(img, 0.00392, (416, 416), (0, 0, 0,), True, crop=False)
for b in blob:
for n, img_blob in enumerate(b):
cv2.imshow(str(n), img_blob)
net.setInput(blob)
outp = net.forward(output_layers)
print(outp)
class_ids = []
confidences = []
boxes = []
for out in outp:
for detection in out:
scores = detection[5:]
class_id = np.argmax(scores)
confidence = scores[class_id]
if confidence > 0.5:
center_x = int(detection[0] * width)
center_y = int(detection[1] * height)
w = int(detection[2] * width)
h = int(detection[3] * height)
x = int(center_x - w / 2)
y = int(center_y - h / 2)
boxes.append([x, y, w, h])
confidences.append(float(confidence))
class_ids.append(class_id)
#print(len(boxes))
number_object_detected = len(boxes)
#font = cv2.FONT_HERSHEY_PLAIN
font = cv2.FONT_HERSHEY_SIMPLEX
for i in range(len(boxes)):
x, y, w, h = boxes[i]
lable = classes[class_ids[i]]
print(lable)
cv2.rectangle(img, (x, y), (x + w, y + h), (0, 255, 0), 2)
cv2.putText(img, label, (x, y + 30), font, 1, (0, 0, 0), 3, cv2.LINE_AA, True
cv2.imshow("Image", img)
#img = cv2.resize(img, None, fx=0.9, fy=0.9)
cv2.waitKey(10000)`enter code here`
錯誤:
Traceback(最近一次調用最后):文件“C:/Users/Gajapati/PycharmProjects/yolo/yolo-opencv.py”,第59行,在cv2.putText(img,label,(x,y + 30),字體, 1, (0, 0, 0), 3, cv2.LINE_AA, True) SystemError: returned NULL 沒有設置錯誤
文本應該是字符串:
cv2.putText(img, str(label), (x, y + 30), font, 1, (0, 0, 0), 3, cv2.LINE_AA, True)
你還沒有關閉括號老兄。 代替
cv2.putText(img, label, (x, y + 30), font, 1, (0, 0, 0), 3, cv2.LINE_AA, True
和
cv2.putText(img, label, (x, y + 30), font, 1, (0, 0, 0), 3, cv2.LINE_AA, True)
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