دورية أكاديمية
Non-Local Sparse Image Inpainting for Document Bleed-Through Removal
| العنوان: | Non-Local Sparse Image Inpainting for Document Bleed-Through Removal |
|---|---|
| المؤلفون: | Muhammad Hanif, Anna Tonazzini, Pasquale Savino, Emanuele Salerno |
| المصدر: | Journal of Imaging, Vol 4, Iss 5, p 68 (2018) |
| بيانات النشر: | MDPI AG, 2018. |
| سنة النشر: | 2018 |
| المجموعة: | LCC:Computer applications to medicine. Medical informatics LCC:Electronic computers. Computer science |
| مصطلحات موضوعية: | ancient document restoration, image inpainting, bleed-through removal, sparse representation, Photography, TR1-1050, Computer applications to medicine. Medical informatics, R858-859.7, Electronic computers. Computer science, QA75.5-76.95 |
| الوصف: | Bleed-through is a frequent, pervasive degradation in ancient manuscripts, which is caused by ink seeped from the opposite side of the sheet. Bleed-through, appearing as an extra interfering text, hinders document readability and makes it difficult to decipher the information contents. Digital image restoration techniques have been successfully employed to remove or significantly reduce this distortion. This paper proposes a two-step restoration method for documents affected by bleed-through, exploiting information from the recto and verso images. First, the bleed-through pixels are identified, based on a non-stationary, linear model of the two texts overlapped in the recto-verso pair. In the second step, a dictionary learning-based sparse image inpainting technique, with non-local patch grouping, is used to reconstruct the bleed-through-contaminated image information. An overcomplete sparse dictionary is learned from the bleed-through-free image patches, which is then used to estimate a befitting fill-in for the identified bleed-through pixels. The non-local patch similarity is employed in the sparse reconstruction of each patch, to enforce the local similarity. Thanks to the intrinsic image sparsity and non-local patch similarity, the natural texture of the background is well reproduced in the bleed-through areas, and even a possible overestimation of the bleed through pixels is effectively corrected, so that the original appearance of the document is preserved. We evaluate the performance of the proposed method on the images of a popular database of ancient documents, and the results validate the performance of the proposed method compared to the state of the art. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2313-433X |
| Relation: | http://www.mdpi.com/2313-433X/4/5/68; https://doaj.org/toc/2313-433X |
| DOI: | 10.3390/jimaging4050068 |
| URL الوصول: | https://doaj.org/article/5020ec3298da49d19f7323a218c29fde |
| رقم الأكسشن: | edsdoj.5020ec3298da49d19f7323a218c29fde |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 2313433X |
|---|---|
| DOI: | 10.3390/jimaging4050068 |