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.
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Public Methods
TensorImage |
apply(TensorImage image)
Applies the defined resizing with cropping or/and padding on given image and returns the
result.
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int |
getOutputImageHeight(int inputImageHeight, int inputImageWidth)
Computes the height of the expected output image when input image size is given.
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int |
getOutputImageWidth(int inputImageHeight, int inputImageWidth)
Computes the width of the expected output image when input image size is given.
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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.
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Inherited Methods
abstract TensorImage |
apply(TensorImage image)
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abstract int |
getOutputImageHeight(int inputImageHeight, int inputImageWidth)
Computes the height of the expected output image when input image size is given.
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abstract int |
getOutputImageWidth(int inputImageHeight, int inputImageWidth)
Computes the width of the expected output image when input image size is given.
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abstract 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.
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abstract TensorImage |
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. |
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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. |
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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 | |
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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. |
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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.