Class RandomCropDecodeResize

Inheritance Relationships

Base Type

Class Documentation

class RandomCropDecodeResize : public mindspore::dataset::TensorTransform

Equivalent to RandomResizedCrop TensorTransform, but crop the image before decoding.

Public Functions

explicit RandomCropDecodeResize(const std::vector<int32_t> &size, const std::vector<float> &scale = {0.08, 1.0}, const std::vector<float> &ratio = {3. / 4, 4. / 3}, InterpolationMode interpolation = InterpolationMode::kLinear, int32_t max_attempts = 10)

Constructor.

Example
/* Define operations */
auto random_op = vision::RandomCropDecodeResize({255, 255}, {0.1, 0.5});

/* dataset is an instance of Dataset object */
dataset = dataset->Map({random_op},  // operations
                       {"image"});              // input columns

参数

  • size – [in] A vector representing the output size of the cropped image. If the size is a single value, a squared crop of size (size, size) is returned. If the size has 2 values, it should be (height, width).

  • scale – [in] Range [min, max) of respective size of the original size to be cropped (default=(0.08, 1.0)).

  • ratio – [in] Range [min, max) of aspect ratio to be cropped (default=(3. / 4., 4. / 3.)).

  • interpolation – [in] An enum for the mode of interpolation.

    • InterpolationMode::kLinear, Interpolation method is blinear interpolation.

    • InterpolationMode::kNearestNeighbour, Interpolation method is nearest-neighbor interpolation.

    • InterpolationMode::kCubic, Interpolation method is bicubic interpolation.

    • InterpolationMode::kArea, Interpolation method is pixel area interpolation.

    • InterpolationMode::kCubicPil, Interpolation method is bicubic interpolation like implemented in pillow.

  • max_attempts – [in] The maximum number of attempts to propose a valid crop_area (default=10). If exceeded, fall back to use center_crop instead.

~RandomCropDecodeResize() = default

Destructor.