Package org.jetbrains.kotlinx.dl.dataset.preprocessor.image

Types

CenterCrop

class CenterCrop(size: Int) : ImagePreprocessorBase

This image preprocessor defines centerCrop operation. It crops the given image at the center. If the image size is smaller than the output size along any edge, the image is padded with 0 and then center cropped.

Convert

class Convert(colorMode: ColorMode) : ImagePreprocessorBase

Converts provided image to the desired ColorMode.

Cropping

class Cropping(top: Int, bottom: Int, left: Int, right: Int) : ImagePreprocessorBase

This image preprocessor defines the Crop operation.

ImagePreprocessing

class ImagePreprocessing

Represents the image preprocessing stage of the org.jetbrains.kotlinx.dl.dataset.preprocessor.Preprocessing. Consists of the operations implementing ImagePreprocessing which are applied to the image one by one.

ImagePreprocessor

interface ImagePreprocessor

Basic interface for image preprocessors. It operates on BufferedImage.

ImagePreprocessorBase

abstract class ImagePreprocessorBase : ImagePreprocessor

Base class for ImagePreprocessor implementations. Allows to add additional features, such as saving output with ImageSaver.

ImageSaver

interface ImageSaver

Interface for saving image preprocessing output result.

InterpolationType

enum InterpolationType : Enum<InterpolationType>

When an image is resized, we need an interpolation algorithm to draw newly created pixels between old pixels.

Padding

class Padding(top: Int, bottom: Int, left: Int, right: Int, mode: PaddingMode) : ImagePreprocessorBase

This image preprocessor defines the Pad operation.

PaddingMode

interface PaddingMode

Type of padding to use.

RenderingSpeed

enum RenderingSpeed : Enum<RenderingSpeed>

The speed of single file preprocessing could be tuned via this setting.

Resize

class Resize(outputWidth: Int, outputHeight: Int, interpolation: InterpolationType, renderingSpeed: RenderingSpeed, enableAntialiasing: Boolean) : ImagePreprocessorBase

This image preprocessor defines the Resize operation.

Rotate

class Rotate(degrees: Float, interpolation: InterpolationType, renderingSpeed: RenderingSpeed, enableAntialiasing: Boolean) : ImagePreprocessorBase

This image preprocessor defines the Rotate operation.

Save

class Save(dirLocation: File?) : ImageSaver

This ImageSaver allows saving image preprocessing result to file or directory in jpg format.

Functions

centerCrop

fun ImagePreprocessing.centerCrop(block: CenterCrop.() -> Unit)

Applies CenterCrop operation to crop the image at the center.

convert

fun ImagePreprocessing.convert(block: Convert.() -> Unit)

Applies Convert operation to convert the image to a different ColorMode.

crop

fun ImagePreprocessing.crop(block: Cropping.() -> Unit)

Applies Cropping operation to crop the image by the specified amount.

grayscale

fun ImagePreprocessing.grayscale()

Applies Convert operation to convert the image to ColorMode.GRAYSCALE.

pad

fun ImagePreprocessing.pad(block: Padding.() -> Unit)

Applies Padding operation to pad the image.

resize

fun ImagePreprocessing.resize(block: Resize.() -> Unit)

Applies Resize operation to resize the image to a specific size.

rotate

fun ImagePreprocessing.rotate(block: Rotate.() -> Unit)

Applies Rotate operation to rotate the image by an arbitrary angle (specified in degrees).

save

fun ImagePreprocessorBase.save(block: Save.() -> Unit)

Saves the result of the enclosing ImagePreprocessor to the specified location.