| Records |
| Author |
Sergi Garcia Bordils; Dimosthenis Karatzas; Marçal Rusiñol |
| Title |
STEP – Towards Structured Scene-Text Spotting |
Type  |
Conference Article |
| Year |
2024 |
Publication |
Winter Conference on Applications of Computer Vision |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
883-892 |
| Keywords |
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| Abstract |
We introduce the structured scene-text spotting task, which requires a scene-text OCR system to spot text in the wild according to a query regular expression. Contrary to generic scene text OCR, structured scene-text spotting seeks to dynamically condition both scene text detection and recognition on user-provided regular expressions. To tackle this task, we propose the Structured TExt sPotter (STEP), a model that exploits the provided text structure to guide the OCR process. STEP is able to deal with regular expressions that contain spaces and it is not bound to detection at the word-level granularity. Our approach enables accurate zero-shot structured text spotting in a wide variety of real-world reading scenarios and is solely trained on publicly available data. To demonstrate the effectiveness of our approach, we introduce a new challenging test dataset that contains several types of out-of-vocabulary structured text, reflecting important reading applications of fields such as prices, dates, serial numbers, license plates etc. We demonstrate that STEP can provide specialised OCR performance on demand in all tested scenarios. |
| Address |
Waikoloa; Hawai; USA; January 2024 |
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WACV |
| Notes |
DAG |
Approved |
no |
| Call Number |
Admin @ si @ GKR2024 |
Serial |
3992 |
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| Author |
Hunor Laczko; Meysam Madadi; Sergio Escalera; Jordi Gonzalez |
| Title |
A Generative Multi-Resolution Pyramid and Normal-Conditioning 3D Cloth Draping |
Type |
Conference Article |
| Year |
2024 |
Publication |
Winter Conference on Applications of Computer Vision |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
8709-8718 |
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| Abstract |
RGB cloth generation has been deeply studied in the related literature, however, 3D garment generation remains an open problem. In this paper, we build a conditional variational autoencoder for 3D garment generation and draping. We propose a pyramid network to add garment details progressively in a canonical space, i.e. unposing and unshaping the garments w.r.t. the body. We study conditioning the network on surface normal UV maps, as an intermediate representation, which is an easier problem to optimize than 3D coordinates. Our results on two public datasets, CLOTH3D and CAPE, show that our model is robust, controllable in terms of detail generation by the use of multi-resolution pyramids, and achieves state-of-the-art results that can highly generalize to unseen garments, poses, and shapes even when training with small amounts of data. |
| Address |
Waikoloa; Hawai; USA; January 2024 |
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WACV |
| Notes |
ISE; HUPBA |
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no |
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Admin @ si @ LME2024 |
Serial |
3996 |
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| Author |
Justine Giroux; Mohammad Reza Karimi Dastjerdi; Yannick Hold-Geoffroy; Javier Vazquez; Jean François Lalonde |
| Title |
Towards a Perceptual Evaluation Framework for Lighting Estimation |
Type |
Conference Article |
| Year |
2024 |
Publication |
Arxiv |
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| Abstract |
rogress in lighting estimation is tracked by computing existing image quality assessment (IQA) metrics on images from standard datasets. While this may appear to be a reasonable approach, we demonstrate that doing so does not correlate to human preference when the estimated lighting is used to relight a virtual scene into a real photograph. To study this, we design a controlled psychophysical experiment where human observers must choose their preference amongst rendered scenes lit using a set of lighting estimation algorithms selected from the recent literature, and use it to analyse how these algorithms perform according to human perception. Then, we demonstrate that none of the most popular IQA metrics from the literature, taken individually, correctly represent human perception. Finally, we show that by learning a combination of existing IQA metrics, we can more accurately represent human preference. This provides a new perceptual framework to help evaluate future lighting estimation algorithms. |
| Address |
Seattle; USA; June 2024 |
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Conference |
CVPR |
| Notes |
MACO; CIC |
Approved |
no |
| Call Number |
Admin @ si @ GDH2024 |
Serial |
3999 |
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| Author |
Mohamed Ramzy Ibrahim; Robert Benavente; Daniel Ponsa; Felipe Lumbreras |
| Title |
SWViT-RRDB: Shifted Window Vision Transformer Integrating Residual in Residual Dense Block for Remote Sensing Super-Resolution |
Type |
Conference Article |
| Year |
2024 |
Publication |
19th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications |
Abbreviated Journal |
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Issue |
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Pages |
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Remote sensing applications, impacted by acquisition season and sensor variety, require high-resolution images. Transformer-based models improve satellite image super-resolution but are less effective than convolutional neural networks (CNNs) at extracting local details, crucial for image clarity. This paper introduces SWViT-RRDB, a new deep learning model for satellite imagery super-resolution. The SWViT-RRDB, combining transformer with convolution and attention blocks, overcomes the limitations of existing models by better representing small objects in satellite images. In this model, a pipeline of residual fusion group (RFG) blocks is used to combine the multi-headed self-attention (MSA) with residual in residual dense block (RRDB). This combines global and local image data for better super-resolution. Additionally, an overlapping cross-attention block (OCAB) is used to enhance fusion and allow interaction between neighboring pixels to maintain long-range pixel dependencies across the image. The SWViT-RRDB model and its larger variants outperform state-of-the-art (SoTA) models on two different satellite datasets in terms of PSNR and SSIM. |
| Address |
Roma; Italia; February 2024 |
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| Notes |
MSIAU |
Approved |
no |
| Call Number |
Admin @ si @ RBP2024 |
Serial |
4004 |
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| Author |
Mohamed Ramzy Ibrahim; Robert Benavente; Daniel Ponsa; Felipe Lumbreras |
| Title |
Unveiling the Influence of Image Super-Resolution on Aerial Scene Classification |
Type |
Conference Article |
| Year |
2023 |
Publication |
Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications |
Abbreviated Journal |
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| Volume |
14469 |
Issue |
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Pages |
214–228 |
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| Abstract |
Deep learning has made significant advances in recent years, and as a result, it is now in a stage where it can achieve outstanding results in tasks requiring visual understanding of scenes. However, its performance tends to decline when dealing with low-quality images. The advent of super-resolution (SR) techniques has started to have an impact on the field of remote sensing by enabling the restoration of fine details and enhancing image quality, which could help to increase performance in other vision tasks. However, in previous works, contradictory results for scene visual understanding were achieved when SR techniques were applied. In this paper, we present an experimental study on the impact of SR on enhancing aerial scene classification. Through the analysis of different state-of-the-art SR algorithms, including traditional methods and deep learning-based approaches, we unveil the transformative potential of SR in overcoming the limitations of low-resolution (LR) aerial imagery. By enhancing spatial resolution, more fine details are captured, opening the door for an improvement in scene understanding. We also discuss the effect of different image scales on the quality of SR and its effect on aerial scene classification. Our experimental work demonstrates the significant impact of SR on enhancing aerial scene classification compared to LR images, opening new avenues for improved remote sensing applications. |
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LNCS |
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Conference |
CIARP |
| Notes |
MSIAU |
Approved |
no |
| Call Number |
Admin @ si @ IBP2023 |
Serial |
4008 |
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| Author |
Patricia Suarez; Dario Carpio; Angel Sappa |
| Title |
Depth Map Estimation from a Single 2D Image |
Type |
Conference Article |
| Year |
2023 |
Publication |
17th International Conference on Signal-Image Technology & Internet-Based Systems |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
347-353 |
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| Abstract |
This paper presents an innovative architecture based on a Cycle Generative Adversarial Network (CycleGAN) for the synthesis of high-quality depth maps from monocular images. The proposed architecture leverages a diverse set of loss functions, including cycle consistency, contrastive, identity, and least square losses, to facilitate the generation of depth maps that exhibit realism and high fidelity. A notable feature of the approach is its ability to synthesize depth maps from grayscale images without the need for paired training data. Extensive comparisons with different state-of-the-art methods show the superiority of the proposed approach in both quantitative metrics and visual quality. This work addresses the challenge of depth map synthesis and offers significant advancements in the field. |
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SITIS |
| Notes |
MSIAU |
Approved |
no |
| Call Number |
Admin @ si @ SCS2023b |
Serial |
4009 |
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| Author |
Rafael E. Rivadeneira; Henry Velesaca; Angel Sappa |
| Title |
Object Detection in Very Low-Resolution Thermal Images through a Guided-Based Super-Resolution Approach |
Type |
Conference Article |
| Year |
2023 |
Publication |
17th International Conference on Signal-Image Technology & Internet-Based Systems |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
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| Abstract |
This work proposes a novel approach that integrates super-resolution techniques with off-the-shelf object detection methods to tackle the problem of handling very low-resolution thermal images. The suggested approach begins by enhancing the low-resolution (LR) thermal images through a guided super-resolution strategy, leveraging a high-resolution (HR) visible spectrum image. Subsequently, object detection is performed on the high-resolution thermal image. The experimental results demonstrate tremendous improvements in comparison with both scenarios: when object detection is performed on the LR thermal image alone, as well as when object detection is conducted on the up-sampled LR thermal image. Moreover, the proposed approach proves highly valuable in camouflaged scenarios where objects might remain undetected in visible spectrum images. |
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SITIS |
| Notes |
MSIAU |
Approved |
no |
| Call Number |
Admin @ si @ RVS2023 |
Serial |
4010 |
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| Author |
Patricia Suarez; Dario Carpio; Angel Sappa |
| Title |
Boosting Guided Super-Resolution Performance with Synthesized Images |
Type |
Conference Article |
| Year |
2023 |
Publication |
17th International Conference on Signal-Image Technology & Internet-Based Systems |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
189-195 |
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| Abstract |
Guided image processing techniques are widely used for extracting information from a guiding image to aid in the processing of the guided one. These images may be sourced from different modalities, such as 2D and 3D, or different spectral bands, like visible and infrared. In the case of guided cross-spectral super-resolution, features from the two modal images are extracted and efficiently merged to migrate guidance information from one image, usually high-resolution (HR), toward the guided one, usually low-resolution (LR). Different approaches have been recently proposed focusing on the development of architectures for feature extraction and merging in the cross-spectral domains, but none of them care about the different nature of the given images. This paper focuses on the specific problem of guided thermal image super-resolution, where an LR thermal image is enhanced by an HR visible spectrum image. To improve existing guided super-resolution techniques, a novel scheme is proposed that maps the original guiding information to a thermal image-like representation that is similar to the output. Experimental results evaluating five different approaches demonstrate that the best results are achieved when the guiding and guided images share the same domain. |
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SITIS |
| Notes |
MSIAU |
Approved |
no |
| Call Number |
Admin @ si @ SCS2023c |
Serial |
4011 |
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| Author |
Jordi Vitria; J. Llacer |
| Title |
Reconstructing 3D light microscopic images using the EM algorithm |
Type |
Journal |
| Year |
1996 |
Publication |
Pattern Recognition Letters |
Abbreviated Journal |
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| Volume |
17 |
Issue |
14 |
Pages |
1491–1498 |
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| Notes |
OR;MV |
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no |
| Call Number |
BCNPCL @ bcnpcl @ ViL1996 |
Serial |
74 |
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| Author |
A. Martinez; Jordi Vitria |
| Title |
Clustering in Image Space for Place Recognition and Visiual Annotations for Human-Robot Interaction. |
Type |
Journal |
| Year |
2001 |
Publication |
IEEE Trans. on Systems, Man, and Cybernatics–Part B: Cybernetics, 31(5):669–682 (IF: 0.789) |
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| Notes |
OR;MV |
Approved |
no |
| Call Number |
BCNPCL @ bcnpcl @ MVi2001 |
Serial |
141 |
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| Author |
J. Pladellorens; Joan Serrat; A. Castell; M.J. Yzuel |
| Title |
Using mathematical morphology to determine left ventricular contours. |
Type |
Journal |
| Year |
1993 |
Publication |
Physics in Medicine and Biology. |
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37 |
Issue |
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Pages |
1877––1894 |
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ADAS |
Approved |
no |
| Call Number |
ADAS @ adas @ PSC1993 |
Serial |
146 |
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| Author |
J. Pladellorens; M.J. Yzuel; J. Castell; Joan Serrat |
| Title |
Calculo automatico del volumen del ventriculo izquierdo. Comparacion con expertos. |
Type |
Journal |
| Year |
1993 |
Publication |
Optica Pura y Aplicada. |
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| Volume |
26 |
Issue |
3 |
Pages |
685–691 |
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ADAS |
Approved |
no |
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ADAS @ adas @ PYC1993 |
Serial |
149 |
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| Author |
Amir A.Amini; Yasheng Chen; Mohamed Elayyadi; Petia Radeva |
| Title |
Tag Surface Reconstruction and Tracking of Myocardial Beads from SPAMM-MRI with Parametric B-Spline Surfaces |
Type |
Journal |
| Year |
2001 |
Publication |
IEEE Transactions on Medical Imaging |
Abbreviated Journal |
TMI |
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20 |
Issue |
2 |
Pages |
94–103 |
| Keywords |
B-spline surfaces, cardiac motion, myocardial beads, myocardial infarction, tagged MRI. |
| Abstract |
Magnetic resonance imaging (MRI) is unique in its ability to noninvasively and selectively alter tissue magnetization, and create tag planes intersecting image slices. The resulting grid of signal voids allows for tracking deformations of tissues in otherwise homogeneous-signal myocardial regions. In this paper, we propose a specific spatial modulation of magnetization (SPAMM) imaging protocol together with efficient techniques for measurement of three-dimensional (3-D) motion of material points of the human heart (referred to as myocardial beads) from images collected with the SPAMM method. The techniques make use of tagged images in orthogonal views by explicitly reconstructing 3-D B-spline surface representation of tag planes (tag planes in two orthogonal orientations intersecting the short-axis (SA) image slices and tag planes in an orientation orthogonal to the short-axis tag planes intersecting long-axis (LA) image slices). The developed methods allow for viewing deformations of 3-D tag surfaces, spatial correspondence of long-axis and short-axis image slice and tag positions, as well as nonrigid movement of myocardial beads as a function of time. |
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MILAB |
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no |
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BCNPCL @ bcnpcl @ ACE2001; IAM @ iam @ ACE2001 |
Serial |
180 |
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| Author |
J.R. Serra; J.B. Subirana |
| Title |
Perceptual Grouping on Texture Images Using Non-Cartesian Networks |
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Journal |
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1996 |
Publication |
IEEE International Conference on Pattern Recognition. Vol B, pp. 462–466 |
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no |
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Admin @ si @ SeS1996a |
Serial |
217 |
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| Author |
Lluis Barcelo; X. Binefa |
| Title |
Bayesian Video Mosaicing with moving objects |
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Journal |
| Year |
2002 |
Publication |
International Journal of Pattern Recognition and Artificial Intelligence, 16(3): 341–348 (IF: 0.359) |
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Admin @ si @ BaB2002 |
Serial |
268 |
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