Multifocus and Multiexposure Techniques

Singh, Harbinder; Cristóbal, Gabriel; Kumar, Vinay

doi:10.1007/978-3-030-39212-3_10

Cited by 5 publications

(2 citation statements)

References 28 publications

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“…For addressing these constraints, multi-focus image fusion (MFIF) emerges as powerful method for extending DoF. [1][2][3][4][5] By leveraging image processing, MFIF effectively negotiates the trade-off between illumination and DoF. Furthermore, this technique excels in recovering intricate details from specimens featuring complex silica-based cell walls and multi-scale patterns, e.g.…”

Section: Introductionmentioning

confidence: 99%

An ImageJ plugin for image fusion based on edge-preserving filtering

Singh,

Forero,

Agaoglu

et al. 2024

Optics, Photonics, and Digital Technologies for Imaging Applications VIII

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A novel ImageJ plugin is designed to extend the depth-of-field (DoF) by seamlessly fusing a series of multi-focus images, allowing for in-depth analysis. Moreover, it has been tested on multi-exposure image stacks, demonstrating its adeptness in preserving intricate details within both poorly and brightly illuminated regions of 3-D specimens. The significance of this capability becomes particularly apparent when dealing with images that exhibit a limited DoF and varying exposure settings under low signal-to-noise ratio conditions. The plugin's effectiveness has been thoroughly validated through the processing and analysis of numerous image stacks featuring diverse diatom and cyanobacteria species. The proposed methodology incorporates a two-scale decomposition (TSD) scheme, complemented by the refinement of weight maps using edge-preserving filtering (EPF). This dual approach ensures the preservation of fine details in the fused image while simultaneously minimizing noise. Such innovations make this plugin a valuable tool for researchers and analysts working with complex image datasets.

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Section: Introductionmentioning

confidence: 99%

An ImageJ plugin for image fusion based on edge-preserving filtering

Singh,

Forero,

Agaoglu

et al. 2024

Optics, Photonics, and Digital Technologies for Imaging Applications VIII

View full text Add to dashboard Cite

show abstract

“…Therefore, in most cases, entire range of the luminance cannot be covered in a single shot. Because of this reason, to cope with the entire range of luminance variation, the specimen needs to be captured at different exposure settings for detailed analysis of fine structures (Singh, Cristóbal, & Kumar, 2020). In digital photomicrography, Piper (2010) propose to use up to ISO 400 according to the brightness level of the specimen when bridge digital cameras are available.…”

Section: Introductionmentioning

confidence: 99%

Nonsubsampled contourlet transform based tone‐mapping operator to optimize the dynamic range of diatom shells

Singh

Cristóbal

Blanco

et al. 2021

Microscopy Res & Technique

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The diatoms have intricate silica‐based cell walls with multi‐scale patterns. High dynamic range (HDR) imaging is widely used to examine the three‐dimensional structure of diatoms for recovering the wide range of contrast and brightness. In order to construct a HDR image of a diatom, multiple images of the specimen are taken at different exposure settings with bright or dark field microscopy. In the proposed method, multi‐scale decomposition based on nonsubsampled contourlet transform is adopted to separate the structured and detailed information of the HDR image. And then, by processing all layers independently, the tone‐mapped image is reconstructed to retain details present in the dark and light regions. Quantitative and qualitative analysis is performed in order to assess the performance of the proposed and seven existing tone‐mapping operators. In analysis, the study indicates that the proposed method enhances the diatom frustules to extract more details.

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A review of image fusion: Methods, applications and performance metrics

Singh

Bueno

et al. 2023

Digital Signal Processing

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Multifocus and Multiexposure Techniques

Cited by 5 publications

References 28 publications

An ImageJ plugin for image fusion based on edge-preserving filtering

An ImageJ plugin for image fusion based on edge-preserving filtering

Nonsubsampled contourlet transform based tone‐mapping operator to optimize the dynamic range of diatom shells

A review of image fusion: Methods, applications and performance metrics

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