ValueError: Input 0 is in compatible with layer vggface_resnet50: expected shape=(None, 224, 224, 3)

Posted 2023-03-16

【中文标题】ValueError: Input 0 is in compatible with layer vggface_resnet50: expected shape=(None, 224, 224, 3), found shape=(None, 1, 224, 224, 3)

【英文标题】：ValueError: Input 0 is incompatible with layer vggface_resnet50: expected shape=(None, 224, 224, 3), found shape=(None, 1, 224, 224, 3)

【发布时间】：2021-03-30 03:40:58

【问题描述】：

我想使用https://morioh.com/p/a07857cbc76d 中的代码为我的人脸项目匹配来自 chokepoint 数据集的人脸，我提取了人脸并想使用 VGGface 和余弦来匹配它们，但出现了这个错误，请你帮帮我吗？

ValueError：在用户代码中：

/usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/training.py:1478 predict_function  *
    return step_function(self, iterator)
/usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/training.py:1468 step_function  **
    outputs = model.distribute_strategy.run(run_step, args=(data,))
/usr/local/lib/python3.6/dist-packages/tensorflow/python/distribute/distribute_lib.py:1259 run
    return self._extended.call_for_each_replica(fn, args=args, kwargs=kwargs)
/usr/local/lib/python3.6/dist-packages/tensorflow/python/distribute/distribute_lib.py:2730 call_for_each_replica
    return self._call_for_each_replica(fn, args, kwargs)
/usr/local/lib/python3.6/dist-packages/tensorflow/python/distribute/distribute_lib.py:3417 _call_for_each_replica
    return fn(*args, **kwargs)
/usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/training.py:1461 run_step  **
    outputs = model.predict_step(data)
/usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/training.py:1434 predict_step
    return self(x, training=False)
/usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/base_layer.py:998 __call__
    input_spec.assert_input_compatibility(self.input_spec, inputs, self.name)
/usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/input_spec.py:274 assert_input_compatibility
    ', found shape=' + display_shape(x.shape))

ValueError: Input 0 is incompatible with layer vggface_resnet50: expected shape=(None, 224, 224, 3), found shape=(None, 1, 224, 224, 3)

这是提取人脸的代码：

def extract_face_from_image(image_path, required_size=(224, 224)):
    image = plt.imread(image_path)
    detector = MTCNN()
    faces = detector.detect_faces(image)
    face_images = []
    for face in faces:
        x1, y1, width, height = face['box']
        x2, y2 = x1 + width, y1 + height
        face_boundary = image[y1:y2, x1:x2]
        face_image = Image.fromarray(face_boundary)
        face_image = face_image.resize(required_size)
        face_array = asarray(face_image)
        face_images.append(face_array)
    return face_images
extracted_face = extract_face_from_image('/content/301.jpg')
plt.imshow(extracted_face[0])
plt.show()

这是匹配面孔的代码：

def get_model_scores(faces):
    samples = asarray(faces, 'float32')
    samples = preprocess_input(samples, version=2)
    model = VGGFace(model='resnet50', include_top=False, input_shape=(224, 224, 3), pooling='avg')
    return model.predict(samples)
faces = [extract_face_from_image(image_path) for image_path in ['/content/125.jpg', 
'/content/126.jpg']]
model_scores = get_model_scores(faces)
if cosine(model_scores[0], model_scores[1]) <= 0.4:
    print("Faces Matched")

【参考方案1】：

旧问题，但将 extract_face_from_image 更改为：

def extract_face_from_image(image_path, required_size=(224, 224)):
    # load image and detect faces
    image = plt.imread(image_path)

    detector = MTCNN()
    faces = detector.detect_faces(image)

    # extract the bounding box from the requested face
    x1, y1, width, height = faces[0]['box']
    x2, y2 = x1 + width, y1 + height

    # extract the face
    face_boundary = image[y1:y2, x1:x2]

    image = cv2.resize(face_boundary, required_size)

    return image

工作得很好。