PreprocessingFilter
Inheritance: java.lang.Object
public class PreprocessingFilter
Base class for image processing commands.
Constructors
| Constructor | Description |
|---|---|
| PreprocessingFilter() |
Fields
| Field | Description |
|---|---|
| Empty |
Methods
| Method | Description |
|---|---|
| AutoDenoising() | Enables the use of an additional neural network to improve the image - reduce noise. |
| AutoDenoising(Rectangle area) | Enables the use of an additional neural network to improve the part of the image - reduce noise. |
| AutoDewarping() | Automatically corrects geometric distortions in the image. |
| AutoSkew() | Enables the automatic image skew correction. |
| AutoSkew(Rectangle area) | Enables the automatic image part skew correction. |
| Binarize() | Converts an image to black-and-white image. |
| Binarize(Rectangle area) | Converts a part of the image to black-and-white image. |
| BinarizeAndDilate() | Dilation adds pixels to the boundaries of objects in an image. |
| BinarizeAndDilate(Rectangle area) | Dilation adds pixels to the boundaries of objects in a part of the image. |
| ContrastCorrection() | Contrast correction filter. |
| ContrastCorrection(Rectangle area) | Contrast correction filter for the part of the image. |
| Invert() | Automatically inverts colors in a document image. |
| Invert(Rectangle area) | Automatically inverts colors in a part of the image. |
| Median() | The median filter run through each element of the image and replace each pixel with the median of its neighboring pixels. |
| Median(Rectangle area) | The median filter run through each element of the part of the image and replace each pixel with the median of its neighboring pixels. |
| Resize(int width, int height) | Rescale image - Upscale or downscale image resolution. |
| Resize(int width, int height, InterpolationFilterType type) | Rescale image - upscale or downscale image resolution. |
| Rotate(float angle) | Rotate original image. |
| Rotate(float angle, Rectangle area) | Rotate the part of the image. |
| Scale(float ratio) | Rescale image - Upscale or downscale image resolution. |
| Scale(float ratio, InterpolationFilterType type) | Rescale image - Upscale or downscale image resolution. |
| Threshold(int value) | Create a binary image based on setting a threshold value on the pixel intensity of the original image. |
| Threshold(int value, Rectangle area) | Create a binary image part based on setting a threshold value on the pixel intensity of the original image part. |
| ToGrayscale() | Converts an image to grayscale image. |
| add(PreprocessingFilter filter) | Add the new filter to the collection to further run all operations. |
| equals(Object arg0) | |
| getClass() | |
| hashCode() | |
| notify() | |
| notifyAll() | |
| toString() | |
| wait() | |
| wait(long arg0) | |
| wait(long arg0, int arg1) |
PreprocessingFilter()
public PreprocessingFilter()
Empty
public static final PreprocessingFilter Empty
AutoDenoising()
public static PreprocessingFilter AutoDenoising()
Enables the use of an additional neural network to improve the image - reduce noise. Useful for images with scan artifacts, distortion, spots, flares, gradients, foreign elements.
Returns: PreprocessingFilter - AutoDenoisingFilter object.
AutoDenoising(Rectangle area)
public static PreprocessingFilter AutoDenoising(Rectangle area)
Enables the use of an additional neural network to improve the part of the image - reduce noise. Useful for images with scan artifacts, distortion, spots, flares, gradients, foreign elements.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| area | java.awt.Rectangle | Rectangle to preprocess. |
Returns: PreprocessingFilter - AutoDenoisingFilter object.
AutoDewarping()
public static PreprocessingFilter AutoDewarping()
Automatically corrects geometric distortions in the image. Extremely resource intensive!
Returns: PreprocessingFilter - AutoDewarpingFilter object.
AutoSkew()
public static PreprocessingFilter AutoSkew()
Enables the automatic image skew correction.
Returns: PreprocessingFilter - AutoSkewFilter object.
AutoSkew(Rectangle area)
public static PreprocessingFilter AutoSkew(Rectangle area)
Enables the automatic image part skew correction.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| area | java.awt.Rectangle | Rectangle to preprocess. |
Returns: PreprocessingFilter - AutoSkewFilter object.
Binarize()
public static PreprocessingFilter Binarize()
Converts an image to black-and-white image. Binary images are images whose pixels have only two possible intensity values. They are normally displayed as black and white. Numerically, the two values are often 0 for black, and 255 for white. Binary images are produced by auto thresholding an image.
Returns: PreprocessingFilter - BinarizeFilter object.
Binarize(Rectangle area)
public static PreprocessingFilter Binarize(Rectangle area)
Converts a part of the image to black-and-white image. Binary images are images whose pixels have only two possible intensity values. They are normally displayed as black and white. Numerically, the two values are often 0 for black, and 255 for white. Binary images are produced by auto thresholding an image.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| area | java.awt.Rectangle | Rectangle to preprocess. |
Returns: PreprocessingFilter - BinarizeFilter object.
BinarizeAndDilate()
public static PreprocessingFilter BinarizeAndDilate()
Dilation adds pixels to the boundaries of objects in an image.
Returns: PreprocessingFilter - DilateFilter object.
BinarizeAndDilate(Rectangle area)
public static PreprocessingFilter BinarizeAndDilate(Rectangle area)
Dilation adds pixels to the boundaries of objects in a part of the image.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| area | java.awt.Rectangle | Rectangle to preprocess. |
Returns: PreprocessingFilter - DilateFilter object.
ContrastCorrection()
public static PreprocessingFilter ContrastCorrection()
Contrast correction filter.
Returns: PreprocessingFilter - ContrastCorrectionFilter object.
ContrastCorrection(Rectangle area)
public static PreprocessingFilter ContrastCorrection(Rectangle area)
Contrast correction filter for the part of the image.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| area | java.awt.Rectangle | Rectangle to preprocess. |
Returns: PreprocessingFilter - ContrastCorrectionFilter object.
Invert()
public static PreprocessingFilter Invert()
Automatically inverts colors in a document image.
Returns: PreprocessingFilter - InvertFilter object.
Invert(Rectangle area)
public static PreprocessingFilter Invert(Rectangle area)
Automatically inverts colors in a part of the image.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| area | java.awt.Rectangle | Rectangle to preprocess. |
Returns: PreprocessingFilter - InvertFilter object.
Median()
public static PreprocessingFilter Median()
The median filter run through each element of the image and replace each pixel with the median of its neighboring pixels.
Returns: PreprocessingFilter - MedianFilter object.
Median(Rectangle area)
public static PreprocessingFilter Median(Rectangle area)
The median filter run through each element of the part of the image and replace each pixel with the median of its neighboring pixels.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| area | java.awt.Rectangle | Rectangle to preprocess. |
Returns: PreprocessingFilter - MedianFilter object.
Resize(int width, int height)
public static PreprocessingFilter Resize(int width, int height)
Rescale image - Upscale or downscale image resolution. InterpolationFilterType = bilinear or nearest neighbor @see InterpolationFilterType
Parameters:
| Parameter | Type | Description |
|---|---|---|
| width | int | The new width of the image. |
| height | int | The new height of the image. |
Returns: PreprocessingFilter - ResizeFilter object.
Resize(int width, int height, InterpolationFilterType type)
public static PreprocessingFilter Resize(int width, int height, InterpolationFilterType type)
Rescale image - upscale or downscale image resolution.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| width | int | The new width of the image. |
| height | int | The new height of the image. |
| type | InterpolationFilterType | InterpolationFilterType @see InterpolationFilterType |
Returns: PreprocessingFilter - ResizeFilter object.
Rotate(float angle)
public static PreprocessingFilter Rotate(float angle)
Rotate original image.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| angle | float | Angle of rotation. Value from -360 to 360. |
Returns: PreprocessingFilter - RotateFilter object.
Rotate(float angle, Rectangle area)
public static PreprocessingFilter Rotate(float angle, Rectangle area)
Rotate the part of the image.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| angle | float | Angle of rotation. Value from -360 to 360. |
| area | java.awt.Rectangle | Rectangle to preprocess. |
Returns: PreprocessingFilter - RotateFilter object.
Scale(float ratio)
public static PreprocessingFilter Scale(float ratio)
Rescale image - Upscale or downscale image resolution. InterpolationFilterType default bilinear or nearest neighbor @see InterpolationFilterType
Parameters:
| Parameter | Type | Description |
|---|---|---|
| ratio | float | The scaling factor. Recommended value from 0.1 to 1 to shrink. From 1 to 10 to enlarge. |
Returns: PreprocessingFilter - ScaleFilter object.
Scale(float ratio, InterpolationFilterType type)
public static PreprocessingFilter Scale(float ratio, InterpolationFilterType type)
Rescale image - Upscale or downscale image resolution.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| ratio | float | The scaling factor. Recommended value from 0.1 to 1 to shrink. From 1 to 10 to enlarge. |
| type | InterpolationFilterType | InterpolationFilterType @see InterpolationFilterType |
Returns: PreprocessingFilter - ScaleFilter object.
Threshold(int value)
public static PreprocessingFilter Threshold(int value)
Create a binary image based on setting a threshold value on the pixel intensity of the original image.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| value | int | The max value. |
Returns: PreprocessingFilter - BinarizeFilter object.
Threshold(int value, Rectangle area)
public static PreprocessingFilter Threshold(int value, Rectangle area)
Create a binary image part based on setting a threshold value on the pixel intensity of the original image part.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| value | int | The max value. |
| area | java.awt.Rectangle | Rectangle to preprocess. |
Returns: PreprocessingFilter - BinarizeFilter object.
ToGrayscale()
public static PreprocessingFilter ToGrayscale()
Converts an image to grayscale image. Grayscale image have 256 level of light in image (0 to 255).
Returns: PreprocessingFilter - GrayscaleFilter object.
add(PreprocessingFilter filter)
public void add(PreprocessingFilter filter)
Add the new filter to the collection to further run all operations. Consistency in the collection matters.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| filter | PreprocessingFilter | New operation to add to filter list. |
equals(Object arg0)
public boolean equals(Object arg0)
Parameters:
| Parameter | Type | Description |
|---|---|---|
| arg0 | java.lang.Object |
Returns: boolean
getClass()
public final native Class<?> getClass()
Returns: java.lang.Class
hashCode()
public native int hashCode()
Returns: int
notify()
public final native void notify()
notifyAll()
public final native void notifyAll()
toString()
public String toString()
Returns: java.lang.String
wait()
public final void wait()
wait(long arg0)
public final native void wait(long arg0)
Parameters:
| Parameter | Type | Description |
|---|---|---|
| arg0 | long |
wait(long arg0, int arg1)
public final void wait(long arg0, int arg1)
Parameters:
| Parameter | Type | Description |
|---|---|---|
| arg0 | long | |
| arg1 | int |