| 1. Identity statement | ||||
| Reference Type | Conference Paper (Conference Proceedings) | |||
| Site | sibgrapi.sid.inpe.br | |||
| Holder Code | ibi 8JMKD3MGPEW34M/46T9EHH | |||
| Identifier | 8JMKD3MGPEW34M/45DJJT5 | |||
| Repository | sid.inpe.br/sibgrapi/2021/09.10.17.47 | |||
| Last Update | 2021:09.10.17.47.39 (UTC) administrator | |||
| Metadata Repository | sid.inpe.br/sibgrapi/2021/09.10.17.47.39 | |||
| Metadata Last Update | 2022:09.10.00.16.17 (UTC) administrator | |||
| Citation Key | GermanoGast:2021:ReFrAd | |||
| Title | Real-Time Frequency Adjustment of Images and Videos  | |||
| Format | On-line | |||
| Year | 2021 | |||
| Access Date | 2024, Oct. 15 | |||
| Number of Files | 1 | |||
| Size | 28331 KiB | |||
| 2. Context | ||||
| Author | 1 Germano, Rafael L. 2 Gastal, Eduardo S. L. | |||
| Affiliation | 1 Instituto de Informática -- UFRGS 2 Instituto de Informática -- UFRGS | |||
| Editor | Paiva, Afonso Menotti, David Baranoski, Gladimir V. G. Proença, Hugo Pedro Junior, Antonio Lopes Apolinario Papa, João Paulo Pagliosa, Paulo dos Santos, Thiago Oliveira e Sá, Asla Medeiros da Silveira, Thiago Lopes Trugillo Brazil, Emilio Vital Ponti, Moacir A. Fernandes, Leandro A. F. Avila, Sandra | |||
| e-Mail Address | eslgastal@inf.ufrgs.br | |||
| Conference Name | Conference on Graphics, Patterns and Images, 34 (SIBGRAPI) | |||
| Conference Location | Gramado, RS, Brazil (virtual) | |||
| Date | 18-22 Oct. 2021 | |||
| Publisher | Sociedade Brasileira de Computação | |||
| Publisher City | Porto Alegre | |||
| Book Title | Proceedings | |||
| Tertiary Type | Master's or Doctoral Work | |||
| History (UTC) | 2021-09-10 17:47:39 :: eslgastal@inf.ufrgs.br -> administrator :: 2022-09-10 00:16:17 :: administrator -> :: 2021 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Keywords | frequency adjustment frequency analysis | |||
| Abstract | We present a technique for real-time adjustment of spatial frequencies in images and videos. Our method allows for both decreasing and increasing of frequencies, and is orthogonal to image resizing. Thus, it can be used to automatically adjust spatial frequencies to preserve the appearance of structured patterns during image downscaling and upscaling. By pre-computing the image's space-frequency decomposition and its unwrapped phases, these operations can be performed in real time, thanks to our novel mathematical perspective on frequency manipulation of digital images: interpreting the problem through the theory of instantaneous frequencies and phase unwrapping. To make this possible, we introduce an algorithm for the simultaneous phase unwrapping of several unordered frequency components, which also deals with the frequency-sign ambiguity of real signals. As such, our method provides theoretical and practical improvements to the concept of spectral remapping, enabling real-time performance and improved color handling. We demonstrate its effectiveness on video and a large number of images subject to frequency adjustment. By providing real-time control over the spatial frequencies associated with structured patterns, our technique expands the range of creative and technical possibilities for image and video processing. | |||
| Arrangement | urlib.net > SDLA > Fonds > SIBGRAPI 2021 > Real-Time Frequency Adjustment... | |||
| doc Directory Content | access | |||
| source Directory Content | there are no files | |||
| agreement Directory Content |
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| 4. Conditions of access and use | ||||
| data URL | http://urlib.net/ibi/8JMKD3MGPEW34M/45DJJT5 | |||
| zipped data URL | http://urlib.net/zip/8JMKD3MGPEW34M/45DJJT5 | |||
| Language | en | |||
| Target File | Germano_Gastal_SIBGRAPI2021_WTD_Frequency_Adjustment.pdf | |||
| User Group | eslgastal@inf.ufrgs.br | |||
| Visibility | shown | |||
| 5. Allied materials | ||||
| Mirror Repository | sid.inpe.br/banon/2001/03.30.15.38.24 | |||
| Next Higher Units | 8JMKD3MGPEW34M/45PQ3RS | |||
| Citing Item List | sid.inpe.br/sibgrapi/2021/11.12.11.46 76 sid.inpe.br/banon/2001/03.30.15.38.24 1 | |||
| Host Collection | sid.inpe.br/banon/2001/03.30.15.38 | |||
| 6. Notes | ||||
| Empty Fields | archivingpolicy archivist area callnumber contenttype copyholder copyright creatorhistory descriptionlevel dissemination documentstage doi edition electronicmailaddress group isbn issn label lineage mark nextedition notes numberofvolumes orcid organization pages parameterlist parentrepositories previousedition previouslowerunit progress project readergroup readpermission resumeid rightsholder schedulinginformation secondarydate secondarykey secondarymark secondarytype serieseditor session shorttitle sponsor subject tertiarymark type url versiontype volume | |||