Defocus noise suppression with combined frame difference and connected component methods in optical scanning...

Area of Science:

• Optics and Photonics
• Digital Image Processing

Background:

• Optical Scanning Holography (OSH) is susceptible to defocus noise.
• Random phase masks can convert this noise into speckle patterns.
• Effective speckle reduction is crucial for improving image quality in OSH.

Purpose of the Study:

• To present a novel speckle reduction technique for random phase-coded OSH systems.
• To improve the image quality and visibility of reconstructed holographic sections.

Main Methods:

• Implementation of a random phase-coded OSH system.
• Application of a combined frame difference and connected component method for speckle reduction.

Main Results:

• Successfully transformed defocus noise into a speckle-like pattern.
• Achieved significant reduction of speckle noise in reconstructed images.
• Demonstrated improved image quality with enhanced visibility of details.

Conclusions:

• The combined frame difference and connected component method is effective for speckle reduction in OSH.
• This technique enhances the practical applicability of random phase-coded OSH systems.
• Improved image quality facilitates better analysis of reconstructed holographic data.