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scripts/libraries: Simplify YOLO post-processing using keepdims.
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@ -74,14 +74,13 @@ class yolo_v2_postprocess:
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def __init__(self, threshold=0.6, anchors=None, nms_threshold=0.1, nms_sigma=0.1):
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self.threshold = threshold
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if anchors is not None:
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self.anchors = anchors
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else:
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if self.anchors is None:
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self.anchors = np.array([[0.98830, 3.36060],
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[2.11940, 5.37590],
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[3.05200, 9.13360],
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[5.55170, 9.30660],
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[9.72600, 11.1422]], dtype=np.float)
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[9.72600, 11.1422]])
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self.anchors_len = len(self.anchors)
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self.nms_threshold = nms_threshold
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self.nms_sigma = nms_sigma
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@ -97,8 +96,8 @@ class yolo_v2_postprocess:
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return a - (b * (a // b))
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def softmax(x):
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e_x = np.exp(x - np.max(x))
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return e_x / np.sum(e_x)
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e_x = np.exp(x - np.max(x, axis=1, keepdims=True))
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return e_x / np.sum(e_x, axis=1, keepdims=True)
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# Reshape the output to a 2D array
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colum_outputs = outputs[0].reshape((oh * ow * self.anchors_len,
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@ -121,18 +120,13 @@ class yolo_v2_postprocess:
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bb_anchors = mod(score_indices, self.anchors_len)
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# Get the anchor box information
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bb_a_array = [self.anchors[i] for i in bb_anchors.tolist()]
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bb_a_array = np.array(bb_a_array)
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bb_a_array = np.take(self.anchors, bb_anchors, axis=0)
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# Get the score information
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bb_scores = sigmoid(bb[:, _YOLO_V2_SCORE])
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# Get the class information
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bb_classes = []
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for i in range(len(score_indices)):
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s = softmax(bb[i, _YOLO_V2_CLASSES:])
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bb_classes.append(np.argmax(s))
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bb_classes = np.array(bb_classes, dtype=np.uint16)
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bb_classes = np.argmax(softmax(bb[:, _YOLO_V2_CLASSES:]), axis=1)
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# Compute the bounding box information
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x_center = (bb_cols + sigmoid(bb[:, _YOLO_V2_TX])) / ow
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@ -192,8 +186,7 @@ class yolo_v5_postprocess:
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bb_scores = bb[:, _YOLO_V5_SCORE]
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# Get the class information
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bb_classes = [np.argmax(bb[x, _YOLO_V5_CLASSES:]) for x in range(bb.shape[0])]
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bb_classes = np.array(bb_classes, dtype=np.uint16)
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bb_classes = np.argmax(bb[:, _YOLO_V5_CLASSES:], axis=1)
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# Compute the bounding box information
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x_center = bb[:, _YOLO_V5_CX]
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