Retinex-Based Relighting for Night Photography
The lighting up of buildings is one form of entertainment that makes a city more colorful, and photographers sometimes change this lighting using photo-editing applications. This paper proposes a method for automatically performing such changes that follows the Retinex theory. Retinex theory indicat...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-01-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/13/3/1719 |
| _version_ | 1797625142482829312 |
|---|---|
| author | Sou Oishi Norishige Fukushima |
| author_facet | Sou Oishi Norishige Fukushima |
| author_sort | Sou Oishi |
| collection | DOAJ |
| description | The lighting up of buildings is one form of entertainment that makes a city more colorful, and photographers sometimes change this lighting using photo-editing applications. This paper proposes a method for automatically performing such changes that follows the Retinex theory. Retinex theory indicates that the complex scenes caught by the human visual system are affected by surrounding colors, and Retinex-based image processing uses these characteristics to generate images. Our proposed method follows this approach. First, we propose a method for extracting a relighting saliency map using Retinex with edge-preserving filtering. Second, we propose a sampling method to specify the lighting area. Finally, we composite the additional light to match the human visual perception. Experimental results show that the proposed sampling method is successful in keeping the illuminated points in bright locations and equally spaced apart. In addition, the proposed various diffusion methods can enhance nighttime skyline photographs with various expressions. Finally, we can add in a new light by considering Retinex theory to represent the perceptual color. |
| first_indexed | 2024-03-11T09:52:36Z |
| format | Article |
| id | doaj.art-f9e163b1d439470ea1da2372918f271a |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T09:52:36Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-f9e163b1d439470ea1da2372918f271a2023-11-16T16:09:27ZengMDPI AGApplied Sciences2076-34172023-01-01133171910.3390/app13031719Retinex-Based Relighting for Night PhotographySou Oishi0Norishige Fukushima1Nagoya Institute of Technology, Nagoya 464-8602, JapanNagoya Institute of Technology, Nagoya 464-8602, JapanThe lighting up of buildings is one form of entertainment that makes a city more colorful, and photographers sometimes change this lighting using photo-editing applications. This paper proposes a method for automatically performing such changes that follows the Retinex theory. Retinex theory indicates that the complex scenes caught by the human visual system are affected by surrounding colors, and Retinex-based image processing uses these characteristics to generate images. Our proposed method follows this approach. First, we propose a method for extracting a relighting saliency map using Retinex with edge-preserving filtering. Second, we propose a sampling method to specify the lighting area. Finally, we composite the additional light to match the human visual perception. Experimental results show that the proposed sampling method is successful in keeping the illuminated points in bright locations and equally spaced apart. In addition, the proposed various diffusion methods can enhance nighttime skyline photographs with various expressions. Finally, we can add in a new light by considering Retinex theory to represent the perceptual color.https://www.mdpi.com/2076-3417/13/3/1719Retinexrelightingnight photography |
| spellingShingle | Sou Oishi Norishige Fukushima Retinex-Based Relighting for Night Photography Applied Sciences Retinex relighting night photography |
| title | Retinex-Based Relighting for Night Photography |
| title_full | Retinex-Based Relighting for Night Photography |
| title_fullStr | Retinex-Based Relighting for Night Photography |
| title_full_unstemmed | Retinex-Based Relighting for Night Photography |
| title_short | Retinex-Based Relighting for Night Photography |
| title_sort | retinex based relighting for night photography |
| topic | Retinex relighting night photography |
| url | https://www.mdpi.com/2076-3417/13/3/1719 |
| work_keys_str_mv | AT souoishi retinexbasedrelightingfornightphotography AT norishigefukushima retinexbasedrelightingfornightphotography |