Pre-processing

Pre-processing or Image Processing for OCR (Optical Character Recognition) involve a series of steps or techniques applied to an image or text image before the character recognition process takes place. The goal is to prepare the image in a suitable and optimal manner for character recognition.

To improve the OCR accuracy, it's important to ensure that the input image is clear, well-lit, and devoid of visual distortions that could hinder character recognition.

Pre-processing Options

Image Upscaler

Increase resolution or size of an image

Image Filter

Filter with background removal function. There are 3 options (Black Text, White Text & Color Text)

Image Adjustments

• Greyscale

• Normalize

• Invert

• Threshold

• Lightness

• Brightness

• Sharpen

All these preprocessing steps are designed to maximize the quality of the text image before the character recognition process begins. A good-quality image will assist the OCR system in recognizing characters with higher accuracy. Keep in mind that the specific pre-processing functions applied may vary based on the characteristics of the input images.