Disparity Estimation Method Based on Focal Stack Disparity Dimension Super-Resolution

Yukai Wang; Chang Liu; Jun Qiu

doi:10.3788/AOS230727

Acta Optica Sinica, Volume. 43, Issue 19, 1911004(2023)

Disparity Estimation Method Based on Focal Stack Disparity Dimension Super-Resolution

Yukai Wang, Chang Liu^*, and Jun Qiu

Author Affiliations

Institute of Applied Mathematics, Beijing Information Science and Technology University, Beijing 100101, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(19)

Fig. 1. Focal stack data and its spectra. (a) Focal stack data; (b) focal stack spectrum

Download full size

Fig. 2. Focal stack and spectrum with low disparity resolution. (a) Focal stack with low disparity resolution; (b) focal stack spectrum with low disparity resolution

Download full size

Fig. 3. Frequency response curves of different filters. (a) Ideal filter and Butterworth filter; (b) frequency response curve

Download full size

Fig. 4. Process of focal stack disparity dimension filtering

Download full size

Fig. 5. Focal stack disparity dimensional super-resolution results. (a) $s = - 1.68$ ; (b) $s = - 0.84$ ; (c) $s = 0$ ; (d) $s = 0.84$ ; (e) $s = 1.68$

Download full size

Fig. 6. Disparity map estimation using different resolution focal stacks. (a) Cotton scene; (b) Pens scene; (c) Platonic scene; (d) Table scene

Download full size

Fig. 7. Generating focal stack from light field projection. (a) $s = - 1.68$ ; (b) $s = - 0.84$ ; (c) $s = 0$ ; (d) $s = 0.84$ ; (e) $s = 1.68$

Download full size

Fig. 8. Generating focusing stack from FDL generation. (a) $s = - 1.68$ ; (b) $s = - 0.84$ ; (c) $s = 0$ ; (d) $s = 0.84$ ; (e) $s = 1.68$

Download full size

Fig. 9. Disparity estimation results of light field projection method and FDL generation method. (a) Cotton scene; (b) Pens scene; (c) Platonic scene; (d) Table scene

Download full size

Fig. 10. Disparity dimension super-resolution results of Butterworth filter with different K values. (a) Focal stack; (b) section; (c) partial enlarged view

Download full size

Fig. 11. Disparity maps estimated after disparity dimensions super-resolution of Butterworth filter with different Kvalues. (a) Cotton scene; (b) Pens scene; (c) Platonic scene; (d) Table scene

Download full size

Fig. 12. Disparity dimension super-resolution results of Bottles scene at different Kvalues. (a) $n = 6$ ; (b) $n = 12$ ; (c) $n = 18$ ; (d) $n = 24$

Download full size

Fig. 13. Disparity dimension super-resolution results of Metals scene at different K values. (a) $n = 6$ ; (b) $n = 12$ ; (c) $n = 18$ ; (d) $n = 24$

Download full size

Fig. 14. Quantitative evaluation results of disparity dimension super-resolution of Butterworth filtering with different K values. (a) PSNR; (b) SSIM

Download full size

Fig. 15. Disparity estimation results of measured data. (a) Disparity estimation using sparse focal stack in disparity dimension; (b) disparity estimation using dense focal stack of disparity dimension super-resolution; (c) disparity estimation using actual disparity dimension dense focal stack

Download full size

Fig. 16. Comparison of disparity curves in measured scenes. (a) Disparity map; (b) disparity curves

Download full size

Table 1. Comparison of focal stack disparity estimation results before and after super-resolution and groundtruth
View table
Table 1. Comparison of focal stack disparity estimation results before and after super-resolution and groundtruth
Data PSNR /dB SSIM
Cotton Pens Platonic Table Cotton Pens Platonic Table
16 images 54.8714 52.5809 54.4988 55.5002 0.9835 0.9632 0.9823 0.9833
Butterworth 56.8403 55.9989 57.1102 57.4376 0.9864 0.9813 0.9852 0.9876

Table 2. Comparison between disparity maps under different methods and groundtruth

View table

Table 2. Comparison between disparity maps under different methods and groundtruth

Method	PSNR /dB				SSIM
Method	Cotton	Pens	Platonic	Table	Cotton	Pens	Platonic	Table
Light field projection	56.4263	53.8427	56.3264	57.5501	0.9849	0.9718	0.9823	0.9878
FDL generation	53.5724	56.1407	57.8347	58.3013	0.9751	0.9840	0.9883	0.9905

Table 3. Comparison of estimated disparity maps after disparity dimensions super-resolution of Butterworth filter with different K and groundtruth
View table
Table 3. Comparison of estimated disparity maps after disparity dimensions super-resolution of Butterworth filter with different K and groundtruth
K PSNR/dB SSIM
Cotton Pens Platonic Table Cotton Pens Platonic Table
0.6 54.2536 55.3009 56.1361 56.5317 0.9736 0.9789 0.9810 0.9833
60 55.5668 55.1568 56.8884 56.6549 0.9815 0.9782 0.9843 0.9837

Tools

Get Citation

Copy Citation Text

Yukai Wang, Chang Liu, Jun Qiu. Disparity Estimation Method Based on Focal Stack Disparity Dimension Super-Resolution[J]. Acta Optica Sinica, 2023, 43(19): 1911004

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites

Paper Information

Category: Imaging Systems

Received: Mar. 29, 2023

Accepted: Apr. 24, 2023

Published Online: Sep. 28, 2023

The Author Email: Chang Liu (liu.chang.cn@ieee.org)

DOI:10.3788/AOS230727

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Comparison of focal stack disparity estimation results before and after super-resolution and groundtruth

Table 1. Comparison of focal stack disparity estimation results before and after super-resolution and groundtruth

Table 2. Comparison between disparity maps under different methods and groundtruth

Table 2. Comparison between disparity maps under different methods and groundtruth

Table 3. Comparison of estimated disparity maps after disparity dimensions super-resolution of Butterworth filter with different K and groundtruth

Table 3. Comparison of estimated disparity maps after disparity dimensions super-resolution of Butterworth filter with different K and groundtruth