Pre-processing

When to Use Pre-processing

Use pre-processing when:

• You're using Tesseract OCR or Windows OCR

• Game text has colored or complex backgrounds

• There's low contrast between text and background

• OCR accuracy is poor without adjustments

Skip pre-processing when:

• You're using Fast OCR, EasyOCR, or other modern engines

• You're using AI-based engines (Qwen 2.5 VL, GPT-4 Vision, Claude Vision)

• You're using cloud-based engines (Google Cloud Vision, Azure Cloud Vision)

Pre-processing Options

Image Upscaler (OCR Master)

Increases the resolution or size of the captured image. Higher resolution can help the OCR engine recognize small or blurry text more accurately.

Image Filter (OCR Master)

Removes background colors and enhances text visibility. There are three filter options:

• Black Text Filter

  • Converts the image to show black text on a white background

• White Text Filter

  • Converts the image to show white text on a black background

• Color Text Filter

  • Preserves text colors while removing background

Image Adjustments

Fine-tune the captured image for better text recognition:

• Greyscale

  • Converts the image to black and white (removes all colors)

• Normalize

  • Automatically adjusts image brightness and contrast

  • Adjust the threshold value to make text stand out more clearly

• Invert

  • Swaps black and white colors in the image

• Threshold

  • Controls the contrast between text and background

  • Adjust the threshold value to make text stand out more clearly

• Lightness

  • Adjusts the overall lightness of the image

• Brightness

  • Adjusts how bright or dark the image appears

• Sharpen

  • Makes text edges more defined and clear