MATLABLikeResize¶

class mmedit.datasets.transforms.MATLABLikeResize(keys, scale=None, output_shape=None, kernel='bicubic', kernel_width=4.0)[source]¶

Resize the input image using MATLAB-like downsampling.

Currently support bicubic interpolation only. Note that the output of this function is slightly different from the official MATLAB function.

Required keys are the keys in attribute “keys”. Added or modified keys are “scale” and “output_shape”, and the keys in attribute “keys”.

Parameters

keys (list[str]) – A list of keys whose values are modified.
scale (float | None, optional) – The scale factor of the resize operation. If None, it will be determined by output_shape. Default: None.
output_shape (tuple(int) | None, optional) – The size of the output image. If None, it will be determined by scale. Note that if scale is provided, output_shape will not be used. Default: None.
kernel (str, optional) – The kernel for the resize operation. Currently support ‘bicubic’ only. Default: ‘bicubic’.
kernel_width (float) – The kernel width. Currently support 4.0 only. Default: 4.0.

transform(results)[source]¶

transform function.

Parameters: results (dict) – A dict containing the necessary information and data for augmentation.
Returns: A dict containing the processed data and information.
Return type: dict