A new low-pass edge-aware filter that is invariant to scale and translation/ (Record no. 38711)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03037n a2200289#a 4500 |
| 001 - CONTROL NUMBER | |
| control field | 40069 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | P5A |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20230123132000.0 |
| 007 - PHYSICAL DESCRIPTION FIXED FIELD--GENERAL INFORMATION | |
| fixed length control field | cr cuuuuuauuuu |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 210315s2020 bl por d |
| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | ocm51338542 |
| 040 ## - CATALOGING SOURCE | |
| Original cataloging agency | P5A |
| Transcribing agency | P5A |
| 090 ## - IMPA CODE FOR CLASSIFICATION SHELVES | |
| IMPA CODE FOR CLASSIFICATION SHELVES | Teses do IMPA |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Colunche, Juan Carlos Rojas |
| 9 (RLIN) | 1178 |
| 245 12 - TITLE STATEMENT | |
| Title | A new low-pass edge-aware filter that is invariant to scale and translation/ |
| Statement of responsibility, etc. | Juan Carlos Rojas Colunche. |
| 246 11 - VARYING FORM OF TITLE | |
| Title proper/short title | Um novo filtro passa-baixa sensível a arestas, invariante por escala e por translação |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Rio de Janeiro: |
| Name of publisher, distributor, etc. | IMPA, |
| Date of publication, distribution, etc. | 2020. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | video online |
| 500 ## - GENERAL NOTE | |
| General note | Defesa de Tese Banca: Diego Nehab - Orientador - IMPA Luiz Henrique de Figueiredo - IMPA Benar Fux Svaiter - IMPA Ralph Teixeira - UFF Eduardo Gastal - UFRGS Leonardo Koller Sacht - Suplente - UFSC. |
| 505 1# - FORMATTED CONTENTS NOTE | |
| Formatted contents note | Resumo: Removing high frequencies using low-pass linear and translation-invariant (LTI) filters is the most prevalent method to avoid aliasing. However, LTI filters couple sharpness to an oscillatory nature, which forces the choice between ringing or excessive smoothing. In this work, we discuss nonlinear filters which remove detail but preserve edges. Nonlinear filters can be sharp without introducing oscillations. However, they are more difficult to use and are not well understood. To solve this problem, we propose nonlinear filters that preserve the properties of LTI filters as much as possible. In particular, we start from the analysis of the recent Rolling Guidance Filter (RGF), including its behavior under translation and domain and range scaling, and obtain the conditions under which they converge uniformly. We also make an empirical analysis based on test images, identifying different problems. Among them, issues on the approximation of smooth regions, oversharpening, inconsistent edge preservation with the number of iterations or local contrast variations, and the need for an input-dependent parameter calibration. We then propose a new nonlinear filter, the Adaptive Regularized Rolling Guidance Filter (ARRGF), that does not suffer from these issues. In particular, it is range-scaling invariant and preserves smooth regions without excessive edge oversharpening. This way, it preserves edges throughout the image, independently of local contrast levels. We also make an empirical analysis based on test images, finding a single set of parameters that work well for a wide range of input images. Finally, we identify some of its limitations and propose topics for future work . |
| 650 04 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Matematica. |
| Source of heading or term | larpcal |
| 9 (RLIN) | 19899 |
| 697 ## - LOCAL SUBJECT | |
| Local Subject | Teses do IMPA |
| Linkage | 24311 |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Nehab, Diego Fernandes. |
| Affiliation | (IMPA) |
| Relator term | orientador |
| 9 (RLIN) | 5301 |
| 711 2# - ADDED ENTRY--MEETING NAME | |
| Meeting name or jurisdiction name as entry element | Defesa de Tese |
| 9 (RLIN) | 10070 |
| 856 4# - ELECTRONIC LOCATION AND ACCESS | |
| Public note | VIDEO |
| Uniform Resource Identifier | <a href="https://bit.ly/3eZ7z6e">https://bit.ly/3eZ7z6e</a> |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Instituto de Matemática Pura e Aplicada |
| Koha item type | VIDEO |
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