如何添加所需点数的叠加？
如何添加所需点数的叠加？
提问于 2017-10-18 10:43:42
我试图训练形状预测器，并面对一个问题，即add_overlay函数需要68个点中的5个。那么，我怎样才能添加一个46点的叠加呢？下面是代码，与文档中的示例中的代码几乎相同。
#!/usr/bin/python
import os
import sys
import glob
import dlib
from skimage import io
if len(sys.argv) != 2:
print(
"Give the path to the examples/faces directory as the argument to this "
"program. For example, if you are in the python_examples folder then "
"execute this program by running:\n"
" ./train_shape_predictor.py ../examples/faces")
exit()
faces_folder = sys.argv[1]
options = dlib.shape_predictor_training_options()
options.oversampling_amount = 500
options.tree_depth = 2
options.be_verbose = True
training_xml_path = os.path.join(faces_folder, "women_test.xml")
dlib.train_shape_predictor(training_xml_path, "predictor.dat", options)
print("\nTraining accuracy: {}".format(
dlib.test_shape_predictor(training_xml_path, "predictor.dat")))
predictor = dlib.shape_predictor("predictor.dat")
detector = dlib.simple_object_detector("detector.svm")
print("Showing detections and predictions on the images in the objects folder...")
win = dlib.image_window()
for f in glob.glob(os.path.join(faces_folder, "*.jpg")):
print("Processing file: {}".format(f))
img = io.imread(f)
win.clear_overlay()
win.set_image(img)
dets = detector(img, 1)
print("Number of faces detected: {}".format(len(dets)))
for k, d in enumerate(dets):
print("Detection {}: Left: {} Top: {} Right: {} Bottom: {}".format(
k, d.left(), d.top(), d.right(), d.bottom()))
shape = predictor(img, d)
print("Part 0: {}, Part 1: {} ...".format(shape.part(0),
shape.part(1)))
win.add_overlay(shape)
win.add_overlay(dets)
dlib.hit_enter_to_continue()输出日志：
Training with cascade depth: 10
Training with tree depth: 2
Training with 500 trees per cascade level.
Training with nu: 0.05
Training with random seed:
Training with oversampling amount: 500
Training with feature pool size: 400
Training with feature pool region padding: 0
Training with lambda_param: 0.1
Training with 20 split tests.
Fitting trees...
Training complete
Training complete, saved predictor to file predictor.dat
Training accuracy: 0.0
Showing detections and predictions on the images in the faces folder...
Processing file: img/women/women5.jpg
Number of faces detected: 1
Detection 0: Left: 290 Top: 498 Right: 646 Bottom: 676
Part 0: (317, 564), Part 1: (319, 582) ...
Traceback (most recent call last):
File "train_shape_detector.py", line 131, in <module>
win.add_overlay(shape)
RuntimeError:
Error detected at line 25.
Error detected in file /tmp/pip-build-867r6kjx/dlib/dlib/../dlib/image_processing/render_face_detections.h.
Error detected in function std::vector<dlib::image_display::overlay_line> dlib::render_face_detections(const std::vector<dlib::full_object_detection>&, dlib::rgb_pixel).
Failing expression was dets[i].num_parts() == 68 || dets[i].num_parts() == 5.
std::vector<image_window::overlay_line> render_face_detections()
You have to give either a 5 point or 68 point face landmarking output to this function.
dets[0].num_parts(): 46回答 1
Stack Overflow用户
回答已采纳
发布于 2017-10-20 08:05:46
您使用的是dlib窗口，该窗口检查检测到的点数为5或68个。
在你的例子中，你得到了46分。您需要在cv2窗口上显示图像。
def annotate_landmarks(image, landmarks):
"""
Given image and a set of landmark points, annotates the points for viewing
:param image: Input image
:type image: np.array
:param landmarks: set of facial landmark points
:type landmarks: [(float, float)]
:return: Resulting annotated image
:rtype: np.array
"""
image = image.copy()
for idx, point in enumerate(landmarks):
pos = (point[0, 0], point[0, 1])
cv2.putText(image, str(idx), pos,
fontFace=cv2.FONT_HERSHEY_SCRIPT_SIMPLEX,
fontScale=0.4,
color=(0, 0, 255))
cv2.circle(image, pos, 3, color=(0, 255, 255))
return image现在使用注释函数来显示结果。
new_img = img
for k, d in enumerate(dets):
shape = predictor(new_img, d)
new_img = annotate_landmarks(new_img, shape)
cv2.imshow(new_image)
cv2.waitkey()注意:这个函数现在可以直接插入到您的需求中。检查传入annotate_landmarks函数的annotate_landmarks类型
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/46808329
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