OperationType

The 'Dilate' operation expands feature pixels, causing lines, text, or marks to become thicker and small gaps to be filled.

• Useful for connecting broken characters, merging close features, or filling in small holes.
• Can help improve OCR results on fragmented or faint text.
• May cause small features to merge if the mask is too large.

Example:
Use 'Dilate' to connect dashed lines or repair broken handwriting.

The 'Erode' operation shrinks feature pixels, causing lines, text, or marks to become thinner and small specks to be removed.

• Useful for removing noise, thinning thick lines, or separating touching features.
• Can help eliminate small blobs or specks from scanned forms.
• May cause thin features to disappear if the mask is too large.

Example:
Use 'Erode' to clean up speckled backgrounds or thin out bold text.

The 'Close' operation first dilates and then erodes the image using the same mask.

• Fills small holes and connects nearby features without significantly altering the overall shape.
• Useful for connecting broken text, closing gaps in lines, or smoothing contours.
• Preserves the size of large features while eliminating small gaps.

Example:
Use 'Close' to join broken lines in tables or connect fragmented text.

The 'Open' operation first erodes and then dilates the image using the same mask.

• Removes small objects or specks while preserving the main structure of larger features.
• Useful for eliminating isolated noise, cleaning up backgrounds, or separating merged features.
• Maintains the shape of large features while removing small artifacts.

Example:
Use 'Open' to remove isolated dots or specks from a scanned document.