Four-Sided Subdivision Algorithm of Curved Polygon

Chen, Long; Feng, Wu‐Shiung; Xie, Yuyang; Bu, Ningyuan; Wang, Zhonghou

doi:10.3724/sp.j.1089.2022.18995

Cited by 1 publication

(1 citation statement)

References 17 publications

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“…Jaidilert et al [3] used different variational inpainting methods to inpaint the Thai murals. Chen et al [4] improved the diffusion term of the curvature-driven diffusions algorithm, and introduced an adaptive control strategy and a smooth function. The geometry-based methods are generally suitable for repairing narrow and long cracks or scratches, but they do not perform well on large missing areas.…”

Section: Introductionmentioning

confidence: 99%

Ancient mural inpainting via structure information guided two-branch model

Deng

2023

Herit Sci

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Ancient murals are important cultural heritages for our exploration of ancient civilizations and are of great research value. Due to long-time exposure to the environment, ancient murals often suffer from damage (deterioration) such as cracks, scratches, corrosion, paint loss, and even large-region falling off. It is an urgent work to protect and restore these damaged ancient murals. Mural inpainting techniques refer to virtually filling the deteriorated regions by reconstructing the structure and texture elements of the mural images. Most existing mural inpainting approaches fail to fill loss contents that contain complex structures and diverse patterns since they neglect the importance of structure guidance. In this paper, we propose a structure-guided two-branch model based on the generative adversarial network (GAN) for ancient mural inpainting. In the proposed model, the mural inpainting process can be divided into two stages: structure reconstruction and content restoration. These two stages are conducted by using a structure reconstruction network (SRN) and a content restoration network (CRN), respectively. In the structure reconstruction stage, SRN employs the Gated Convolution and the Fast Fourier Convolution (FFC) residual block to reconstruct the missing structures of the damaged murals. In the content restoration stage, CRN uses the structures (generated by SRN) to guide the missing content restoration of the murals. We design a two-branch parallel encoder to improve the texture and color restoration quality for the missing regions of the murals. Moreover, we propose a cascade attention module that can capture long-term relevance information in the deep features. It helps to alleviate the texture-blur and color-bias problem. We conduct experiments on both simulated and real damaged murals, and compare our inpainting results with other four competitive approaches. Experimental results show that our proposed model outperforms other approaches in terms of texture clarity, color consistency and structural continuity of the restored mural images. In addition, the mural inpainting results of our model can achieve comparatively high quantitative evaluation metrics.

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Section: Introductionmentioning

confidence: 99%

Ancient mural inpainting via structure information guided two-branch model

Deng

2023

Herit Sci

View full text Add to dashboard Cite

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Four-Sided Subdivision Algorithm of Curved Polygon

Cited by 1 publication

References 17 publications

Ancient mural inpainting via structure information guided two-branch model

Ancient mural inpainting via structure information guided two-branch model

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