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- import numpy as np
- from nabirds import utils
- from .base import BasePartCollection, BasePart
- from .annotation import BBoxPart
- class Parts(BasePartCollection):
- def __init__(self, image, part_annotations, rescale_size):
- super(Parts, self).__init__()
- self._parts = [BasePart.new(image, a, rescale_size) for a in part_annotations]
- class UniformParts(BasePartCollection):
- def __init__(self, image, ratio):
- super(UniformParts, self).__init__()
- self._parts = list(self.generate_parts(image, ratio))
- def generate_parts(self, im, ratio, round_op=np.floor):
- h, w, c = utils.dimensions(im)
- part_w = round_op(w * ratio).astype(np.int32)
- part_h = round_op(h * ratio).astype(np.int32)
- n, m = w // part_w, h // part_h
- # fit best possible part_w and part_h
- part_w = int(w / n)
- part_h = int(h / m)
- for i in range(n*m):
- row, col = np.unravel_index(i, (n, m))
- x, y = col * part_w, row * part_h
- yield BBoxPart(im, [i, x, y, part_w, part_h])
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