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ResizeWithCropOrPadOp

public class ResizeWithCropOrPadOp

As a computation unit for processing images, it could resize image to predefined size.

It will not stretch or compress the content of image. However, to fit the new size, it crops or pads pixels. When it crops image, it performs a center-crop; when it pads pixels, it performs a zero-padding.

Public Constructors

ResizeWithCropOrPadOp(int targetHeight, int targetWidth)
Creates a ResizeWithCropOrPadOp which could crop/pad images to specified size.

Public Methods

TensorImage
apply(TensorImage image)
Applies the defined resizing with cropping or/and padding on given image and returns the result.
int
getOutputImageHeight(int inputImageHeight, int inputImageWidth)
Computes the height of the expected output image when input image size is given.
int
getOutputImageWidth(int inputImageHeight, int inputImageWidth)
Computes the width of the expected output image when input image size is given.
PointF
inverseTransform(PointF point, int inputImageHeight, int inputImageWidth)
Transforms a point from coordinates system of the result image back to the one of the input image.

Inherited Methods

Public Constructors

public ResizeWithCropOrPadOp (int targetHeight, int targetWidth)

Creates a ResizeWithCropOrPadOp which could crop/pad images to specified size. It adopts center-crop and zero-padding.

Parameters
targetHeight The expected height of cropped/padded image.
targetWidth The expected width of cropped/padded image.

Public Methods

public TensorImage apply (TensorImage image)

Applies the defined resizing with cropping or/and padding on given image and returns the result.

Note: the content of input image will change, and image is the same instance with the output.

Parameters
image input image.
Returns
  • output image.

public int getOutputImageHeight (int inputImageHeight, int inputImageWidth)

Computes the height of the expected output image when input image size is given.

Parameters
inputImageHeight
inputImageWidth

public int getOutputImageWidth (int inputImageHeight, int inputImageWidth)

Computes the width of the expected output image when input image size is given.

Parameters
inputImageHeight
inputImageWidth

public PointF inverseTransform (PointF point, int inputImageHeight, int inputImageWidth)

Transforms a point from coordinates system of the result image back to the one of the input image.

Parameters
point the point from the result coordinates system.
inputImageHeight the height of input image.
inputImageWidth the width of input image.
Returns
  • the point with the coordinates from the coordinates system of the input image.