[英]I'm using TF Object Detection API with Open CV
如何提取視頻檢測到的對象的類型。例如,一旦對象檢測API中的視頻檢測到“筆記本電腦”,如何獲取“筆記本電腦”標簽及其ID並在單獨的文件中顯示?
import cv2
cap = cv2.VideoCapture(0)
with detection_graph.as_default():
with tf.Session(graph=detection_graph) as sess:
ret = True
while (ret):
ret,image_np = cap.read()
image_np_expanded = np.expand_dims(image_np, axis=0)
image_tensor = detection_graph.get_tensor_by_name('image_tensor:0')
boxes = detection_graph.get_tensor_by_name('detection_boxes:0')
# Each score represent how level of confidence for each of the objects.
# Score is shown on the result image, together with the class label.
scores = detection_graph.get_tensor_by_name('detection_scores:0')
classes = detection_graph.get_tensor_by_name('detection_classes:0')
num_detections = detection_graph.get_tensor_by_name('num_detections:0')
# Actual detection.
(boxes, scores, classes, num_detections) = sess.run(
[boxes, scores, classes, num_detections],
feed_dict={image_tensor: image_np_expanded})
# Visualization of the results of a detection.
vis_util.visualize_boxes_and_labels_on_image_array(
image_np,
np.squeeze(boxes),
np.squeeze(classes).astype(np.int32),
np.squeeze(scores),
category_index,
use_normalized_coordinates=True,
line_thickness=8)
cv2.imshow('image',cv2.resize(image_np,(600,400)))
if cv2.waitKey(25) & 0xFF == ord('q'):
cv2.destroyAllWindows()
cap.release()
break
假設您有用於標簽映射的pbtxt文件,如下所示:
item {
name: "/m/01g317"
id: 1
display_name: "person"
}
item {
name: "/m/0199g"
id: 2
display_name: "bicycle"
}
item {
name: "/m/0k4j"
id: 3
display_name: "car"
}
...
您可以使用label_map_util [ https://github.com/tensorflow/models/blob/master/research/object_detection/utils/label_map_util.py]將標簽讀取到字典中
label_map = label_map_util.load_labelmap(LABELS_PBTXT_FILE_PATH)
categories = label_map_util.convert_label_map_to_categories(label_map, max_num_classes=n_classes, use_display_name=True)
idx_to_label = {}
for cat in categories:
idx_to_label[cat['id']] = cat['name']
然后-當您獲得idx_to_label字典時,只需使用
idx_to_label.get(curr_id, 'N/A')
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.