PreprocessingFilter
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]PreprocessingFilter class
Base class for image processing commands.
The PreprocessingFilter type exposes the following members:
Constructors
| Name | Description |
|---|---|
| PreprocessingFilter() | Initializes a new instance of the PreprocessingFilter class |
Properties
| Name | Description |
|---|---|
| default | Default filters collection contain AutoSkew filter |
| empty | Empty filters collection |
Methods
| Name | Description |
|---|---|
| resize(width, height, type) | Rescale image - Upscale or downscale image resolution. |
| resize(width, height) | Rescale image - Upscale or downscale image resolution. |
| scale(ratio) | Rescale image - Upscale or downscale image resolution. InterpolationFilterType = Lanczos8 |
| scale(ratio, type) | Rescale image - Upscale or downscale image resolution. |
| 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. |
| dilate() | Dilation adds pixels to the boundaries of objects in an image. |
| invert() | Automatically inverts colors in a document image. |
| rotate(angle) | Rotate original image. |
| to_grayscale() | Converts an image to grayscale image. Grayscale image have 256 level of light in image (0 to 255). |
| threshold(value) | Create a binary image based on setting a threshold value on the pixel intensity of the original image. |
| median() | The median filter run through each element of the image and replace each pixel with the median of its neighboring pixels. |
| auto_denoising() | 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. |
| auto_skew() | Enables the automatic image skew correction. |
| auto_dewarping() | Automatically corrects geometric distortions in the image. Extremely resource intensive! |
| contrast_correction_filter() | Contrast correction filter. |
| add(filter) | Add the new filter to the collection to further run all operations. Consistency in the collection matters. |
See Also
- namespace aspose.ocr.models.preprocessingfilters
- assembly Aspose.ocr