Improved minimum intensity projection in holographic reconstruction via SNR-enhanced holography

Abstract

In digital in-line particle holography (DIPH), minimum intensity projection (MIP) is a crucial step in the reconstruction procedure, the MIP image quality is significantly degraded by nonuniform-illumination, speckle noise and the artifacts from off-focal planes. Here, we report a method that improves the MIP image quality by fully exploiting the advantages of SNR-enhanced holography, along with a nouniform illumination correction procedure without requiring a-priori assumptions about particle structures. Experimental results for nonspherical particles show that the proposed method can correct nonuniform-illumination and mitigate the artifacts from off-focal planes, allowing one to extract the particle’s size, shape and transverse location from a 2D single image.

KEYWORDS:

• Digital holography
• coherent noise
• nonuniform-illumination

Subject classification codes:

• holography

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

Science Challenge Project of China [grant number TZ2016001]; CAEP Foundation [grant number CX2019006]; Natural Science Foundation of China [grant numbers 11702275, 11802289, 11672275].