mindspore.dataset.vision.Invert
- class mindspore.dataset.vision.Invert[源代码]
对输入的RGB图像进行色彩反转。
对于图像中的每个像素,若原像素值为 pixel ,则反转后的像素值为 255 - pixel 。
- 异常:
RuntimeError - 如果输入图像的shape不是 <H, W, C>。
- 支持平台:
CPU
样例:
>>> import numpy as np >>> import mindspore.dataset as ds >>> import mindspore.dataset.vision as vision >>> >>> # Use the transform in dataset pipeline mode >>> data = np.random.randint(0, 255, size=(1, 100, 100, 3)).astype(np.uint8) >>> numpy_slices_dataset = ds.NumpySlicesDataset(data, ["image"]) >>> transforms_list = [vision.Invert()] >>> numpy_slices_dataset = numpy_slices_dataset.map(operations=transforms_list, input_columns=["image"]) >>> for item in numpy_slices_dataset.create_dict_iterator(num_epochs=1, output_numpy=True): ... print(item["image"].shape, item["image"].dtype) ... break (100, 100, 3) uint8 >>> >>> # Use the transform in eager mode >>> data = np.array([[0, 1, 2, 3, 4, 5], [0, 1, 2, 3, 4, 5]], dtype=np.uint8).reshape((2, 2, 3)) >>> output = vision.Invert()(data) >>> print(output.shape, output.dtype) (2, 2, 3) uint8
- 教程样例: