Hasil untuk "Photography"

Jin Wook Kim

Sérgio Lousada, Sérgio Lousada, Sérgio Lousada et al.

Coastal lagoons are among the most vulnerable aquatic environments to climate change and human pressures; therefore, studying the Curonian Lagoon is crucial to support evidence-based management and improve understanding of shoreline responses to hydro-meteorological forcing and local land-use pressures. This research investigates the evolution of the Curonian Lagoon shoreline near Preila (Neringa municipality) from 1995 to 2024 using a multi-temporal orthophotographic series (ORT10LT) complemented by a very high-resolution UAV orthomosaic produced in 2024. Shoreline position was consistently delineated and compared across eight observation periods to quantify section-based displacement and hotspot area changes. The analysis reveals a spatially organized pattern, with a persistent accumulation-prone stretch in the mid-profile (250–350 m) and a persistent erosion hotspot toward the latter shoreline (400–566 m). The maximum shoreline retreat reached 32.80 m (425 m section, 2024 relative to 1995–1999), while the maximum shoreline advance reached 18.22 m (275 m section, 2021–2023). Area-based hotspot metrics indicate erosion losses up to 654 m2 (2018–2020) and accumulation gains up to 395 m2 (2009–2010) relative to the baseline. These results provide a reproducible, decision-oriented shoreline-change characterization that supports targeted monitoring and management of this culturally and environmentally significant lagoon margin.

Panagiotis Derekas, Charalampos Theodoridis, Aristidis Likas et al.

<b>Background:</b> Integrating artificial intelligence into clinical photography offers great potential for monitoring skin conditions such as actinic keratosis (AK) and skin field cancerization. Identifying the extent of AK lesions often requires more than analyzing lesion morphology—it also depends on contextual cues, such as surrounding photodamage. This highlights the need for models that can combine fine-grained local features with a comprehensive global view. <b>Methods:</b> To address this challenge, we propose AKTransU-net, a hybrid U-net-based architecture. The model incorporates Transformer blocks to enrich feature representations, which are passed through ConvLSTM modules within the skip connections. This configuration allows the network to maintain semantic coherence and spatial continuity in AK detection. This global awareness is critical when applying the model to whole-image detection via tile-based processing, where continuity across tile boundaries is essential for accurate and reliable lesion segmentation. <b>Results:</b> The effectiveness of AKTransU-net was demonstrated through comparative evaluations with state-of-the-art segmentation models. A proprietary annotated dataset of 569 clinical photographs from 115 patients with actinic keratosis was used to train and evaluate the models. From each photograph, crops of 512 × 512 pixels were extracted using translation lesion boxes that encompassed lesions in different positions and captured different contexts. AKtransU-net exhibited a more robust context awareness and achieved a median Dice score of 65.13%, demonstrating significant progress in whole-image assessments. <b>Conclusions:</b> Transformer-driven context modeling offers a promising approach for robust AK lesion monitoring, supporting its application in real-world clinical settings where accurate, context-aware analysis is crucial for managing skin field cancerization.

Georgios S. Ioannidis, Katerina Nikiforaki, Aikaterini Dovrou et al.

This study aims to develop an explainable radiomics-based model for the automatic assessment of image quality in breast cancer Dynamic Contrast-Enhanced Magnetic Resonance Imaging (DCE-MRI) data. A cohort of 280 images obtained from a public database was annotated by two clinical experts, resulting in 110 high-quality and 110 low-quality images. The proposed methodology involved the extraction of 819 radiomic features and 2 No-Reference image quality metrics per patient, using both the whole image and the background as regions of interest. Feature extraction was performed under two scenarios: (i) from a sample of 12 slices per patient, and (ii) from the middle slice of each patient. Following model training, a range of machine learning classifiers were applied with explainability assessed through SHapley Additive Explanations (SHAP). The best performance was achieved in the second scenario, where combining features from the whole image and background with a support vector machine classifier yielded sensitivity, specificity, accuracy, and AUC values of 85.51%, 80.01%, 82.76%, and 89.37%, respectively. This proposed model demonstrates potential for integration into clinical practice and may also serve as a valuable resource for large-scale repositories and subgroup analyses aimed at ensuring fairness and explainability.

Chia-Hsuan Hsu, James Davis Reimer, Tohru Naruse et al.

Wang Linfeng, Liu Jiayao, Liu Yong et al.

Abstract Automatic detection of tomato leaf spot disease is essential for control and loss reduction. Traditional algorithms face challenges such as large amount of data, multiple training and heavy computation. In this study, a lightweight shared Siamese neural network method was proposed for tomato leaf disease identification, which is suitable for resource‐limited environments. Experiments on Plant‐Village, Taiwan and Taiwan ++ datasets show that the accuracy fluctuates very little even when trained with only 60% of the data, which confirms the effectiveness of the proposed method in the small data environment. In addition, compared with the mainstream algorithms, it improves the accuracy by up to 35.3%on Plant‐Village and two Taiwan datasets respectively. The experimental results also show that the proposed method still performs well when the data is imbalanced and the sample size is small.

Susanne Østby Sæther

In this interview, the Senior Curator of Photography and New Media at Henie Onstad Kunstsenter speaks with photographers and media artists Lesia Vasylchenko and Istvan Virag about their works commissioned for the New Visions triennial, presented at Henie Onstad in 2023. Vasylchenko and Virag explain how they work with contemporary image production and display technologies, such as synthetic aperture radar images and LED-screens and the perceptual politics associated with these technologies, as well as how they engage with organic materials as resources subject to extraction as well as material witnesses. The interview also addresses how the artists conceptually and practically tackle questions of image resolution and scale, and the artists’ extensive collaboration with scientific knowledge clusters and researchers.

Eugenia Stamatopoulou, Maria Karoglou, Asterios Bakolas

Non-destructive techniques (NDT) have enhanced their usefulness in the field of cultural heritage protection and have become valuable tools for the investigation of composing materials, as well as for the detection of alteration and degradation of various structures. In the current study, non-destructive techniques, based on digital photography processing and analysis (digital photography-Vis/UVF, portable digital optical microscopy, colorimetry, infrared thermography), are used for the examination of three composite contemporary artworks created on photosensitized cement. This approach was applied to a series of composite works (photosensitized cement surfaces) in order to understand the craftmanship of the artist, document the materials used and assess the overall condition of the artworks. The techniques and methods applied can be used as a benchmark for the study of similarly complex artworks and for conservation and restoration planning. This comparative study has shown that, although the three artworks under examination are composed of alike materials (cement mortar, plaster, photosensitive emulsion), they exhibit distinct condition states, which can be attributed to variations in the artist technique and application, as well as to their exposure to different environmental conditions.

Lijie Xie, Fubao Zhu, Ni Yao

Abstract Liver image segmentation is an attractive topic in the diagnosis and surgical planning of liver diseases. Although deep learning methods have significantly advanced liver segmentation, existing frameworks fail to clearly determine liver boundaries, especially in medical images where various organs have similar grey levels. In this paper, the authors design a multi‐scale dense residual network (MDR‐Net) for liver segmentation, which consists of two blocks: a liver segmentation network and an edge‐aware network. In the segmentation network, the authors introduce a multi‐scale residual pooling module combining channel attention (CA) mechanism and depth‐wise separable convolution to accommodate liver scale variation. Furthermore, the authors employ an edge‐aware loss network to refine edge information and enhance feature representation, which is beneficial to guide the network to iterate towards the ground truth. The authors’ method achieves the best visualization results in qualitative evaluation. In addition, the authors’ method achieves 96.189% on 3D‐IRCADb and 96.889% on the CHAOS dataset in quantitative evaluation with respect to the dice index.

Tunesi, Lorenzo

The sequence of events in the lives of Luigi Valeriano Pozzi and Pompeo Pozzi, intertwined as father and son, provides a glimpse into the world of art publishing of XIX Century Milan. Their shop in Galleria De Cristoforis is the starting point for a reassessment of the careers of two well known makers: the aim is to shed light on their familiar and urban context, in search of the roots of their professions. While Luigi Valeriano was a respected business owner, although a former clandestine printer in the French and Austrian city, Pompeo’s career started instead in a less adventurous juncture, in Brera; however, soon came the year 1848, and few months later his newly found appreciation for art photography.

Kyong Chan Park, Se Young Kim, Galina Khan et al.

Background Laminin 5, which is found in the basement membrane of dermal-epidermal junction (DEJ), is a major adhesive component and associated with proliferating and migrating keratinocytes. In this study, we hypothesized that the topical application of the skin care products containing the novel peptides might restore the DEJ structure by deriving deposition of laminin 5 and promoting the keratinocyte migration. Here, we evaluated the restoration of DEJ by measuring the skin thickness. Methods Single-center retrospective analysis was performed on a total of 13 patients who underwent skin care using Baume L.C.E. (France, Laboratories d' Anjou) between January and March 2021. All patients applied the skin care agent for 2 weeks only on their left hand dorsum. Before the initiation of the application and after 2 weeks, both their hands were evaluated on photography and ultrasound. And the patients were asked to rate their satisfaction with the questionnaire after 2 weeks. Results There was no obvious improvement in photographic assessment and questionnaire. The post–pre difference of skin thickness in ultrasound images was, in left hand, 0.1 ± 0.37 in distal point and 0.1 ± 0.35 in proximal point; and, in right hand, 0 ± 0.17 in distal point and 0 ± 0.15 in proximal point, respectively. The pre–post difference was statistically significant in proximal point (p = 0.035). Conclusion Topical application of novel peptide derivative comprising laminin 5 demonstrated cutaneous changes including skin thickness, as assessed by ultrasound. Further studies using other modalities including dermal density measurement, three-dimensional photography, optical coherence tomography, or skin biopsy would be helpful to determine the skin-improving effects.

Camilla Balbi

In 1955, Ellen Auerbach, a Weimarian advertising photographer of the Bauhaus circles, chose to document her trip to Mexico with her colleague Eliot Porter, using color photography for the first time in her career. This article seeks to contextualize, for the first time, Auerbach’s decision to use color in her work – and within the history of modernism in general. In a discourse where exile studies interweave closely with art theory, I intend to trace the paths of a modernism that might have been, but that was erased by history and migration, demonstrating how the use of color in a non-Western exile context became a starting point for rethinking the aims and epistemic possibilities of the photographic medium within and beyond the modernist perspective.

Petra Trnkova

Kleoniki Keklikoglou, Christos Arvanitidis, Georgios Chatzigeorgiou et al.

Several imaging techniques are used in biological and biomedical studies. Micro-computed tomography (micro-CT) is a non-destructive imaging technique that allows the rapid digitisation of internal and external structures of a sample in three dimensions and with great resolution. In this review, the strengths and weaknesses of some common imaging techniques applied in biological and biomedical fields, such as optical microscopy, confocal laser scanning microscopy, and scanning electron microscopy, are presented and compared with the micro-CT technique through five use cases. Finally, the ability of micro-CT to create non-destructively 3D anatomical and morphological data in sub-micron resolution and the necessity to develop complementary methods with other imaging techniques, in order to overcome limitations caused by each technique, is emphasised.

X. Y. Peng, G. Q. Zhou, H. B. Yan et al.

Remote sensing digital image mosaic refers to the splicing of two or more remote sensing images into a panoramic image to meet the application requirements of wide images. It is becoming more and more important to cover large areas of mosaic images. The data pre-processing and mosaic process are different for different images. In this paper, the declassified intelligence satellite photography (DISP) in the 1960s was used as experimental data, taking Qujing in Yunnan Province as an example, a total of 92 scene images were used for DISP image processing and seamless mosaic. Firstly, In order to make full use of the image, it is necessary to perform orthorectification on the KH-4B images covering Qujing. Considering that the satellite orbit parameters and other parameters are unknown, several models for orthorectification of satellite images are proposed. After experiments and analysis, it is concluded that the third order polynomial is the optimal. Secondly, given the problem of radiation imbalance caused by the difference of time phase, the histogram equalization method is used for color balance, the image of the seam line is eliminated. Finally, the seamless mosaic is achieved. The map of the 1960s DISP in Qujing is obtained. The map can provide material basis for future research and other fields. The processing methods of historical images can be used for reference by others.

Maierhofer, Roberta

Sowohl die öffentliche Diskussion des Themas „Altern“, die stark von sozio-politischen, medizinischen oder ökonomischen Beiträgen geprägt ist, als auch die gängige kulturwissenschaftliche Beschäftigung damit stellen „Alter“ als individuelle und soziale Belastung in den Mittelpunkt. Es bleibt dabei weitgehend unbeachtet, wie sehr auf diese Weise die negative Bestimmung von „Alter“ durch die Öffentlichkeit verfestigt und die vom Individuum vorgenommene lebensbejahende Gestaltung der Zeitlichkeit von Existenz, wozu das intergenerationale Verhältnis zu zählen ist, außer Acht gelassen wird. Der Film Visages Villages (FR 2017) von Agnès Varda demonstriert durch seine Eigenschaft als Kunstwerk diese individuell und sozial erfolgte Gestaltung menschlichen Lebens. Ein von Varda und dem Fotokünstler JR durchgeführtes gemeinsames Kunstprojekt – Gesichter des Lebens – wird als Prozess der Vergegenwärtigung, Äußerung individueller Authentizität dargestellt. Das Zusammenwirken von zwei Kunstformen –Fotographie und Film – ermöglicht die Präsentation einer Hermeneutik der Gegenwärtigkeit des Lebens, die als Identität des Kunstwerks auf eine mögliche der menschlichen Existenz verweist. „Alter“ und „Jugend“ sind demnach keine Attribute des Individuums oder der Gesellschaft, sondern Herausforderungen für die Gestaltung authentischen Menschseins. Dabei ist die Bereitschaft zu schaffen, immer wieder einen Anfang für die Gegenwärtigkeit des Lebens anzu-nehmen. Eine Kulturwissenschaft, die kulturelle Repräsentationen „anokritisch“ als Vergegenwärtigungen menschlicher Existenzgestaltungen versteht, tritt daher für eine – in den Kunstwerken angelegte – offene und lebensadäquate Hermeneutik der Lebensalter ein. Public presence of the topic of “aging” as a merely socio-political, medical, or economic issue as well as the dominant cultural discussions of “age” as an individual and social burden have contributed to dominant ageist stereotypical notions by ignoring the influence of strong life-affirming expressions of temporality as an integral part of our existence. Cultural representations of intergenerational relationships as presented in the film Visages Villages (FR 2017) by Agnès Varda, for example, provide through its art form an expression of individual authenticity that allows an expression of what it means to construct one’s life in a constant process of continuity and change, thus understanding our lives as individually and socially constructed. A joint art project – Faces, Places – by Varda and the photo artist JR is presented as a process of visualization and temporary expressions of individual authenticity. The interaction of two art forms – photography and film – allows for a hermeneutic expression of the presence of our human existence, both in art and life. Categories uch as “youth” and “age” are, therefore, meaningless both for the individual as well as society in general, but can be taken as challenges for the individual creation of a meaningful life. The willingness to engage in life through art allows for an understanding of our lives in the matrix of time and experience. Through an anocritical approach the visual translation of human experience into film and photography can let us experience life through art as a life-appropriate expression of what it means to live in different stages of our existence.

Munazza Tabassum, Tariq M. Khan, Muhammad Arsalan et al.

Glaucoma is an eye disease that can cause loss of vision by damaging the optic nerve. It is the world's second leading cause of blindness after cataracts. Early diagnosis of glaucoma is a key to prevent permanent blindness as it has no noticeable symptoms in its early stages. Color fundus photography is used for examining the optic disc (OD) which is an important step in the diagnoses of glaucoma. This is done by estimating the cup-to-disc ratio (CDR). In this paper, we proposed a Cup Disc Encoder Decoder Network (CDED-Net) for the joint segmentation of optic disc (OD) and optic cup (OC). We have eradicated the pre-processing and post-processing steps to reduce the computational cost of the overall system. Segmentation of (OD) and OC is modeled as a semantic pixel-wise labeling problem. The model was trained on the DRISHTI-GS, RIM-ONE and REFUGE datasets. Experiments show that our CDED-Net system achieves state-of-the-art OD and OC segmentation results on these datasets.

Shuxia Chen

Alison M. Smith, P. Ramsay

Barbara Lena Gierszewska

The article presents the problems of private life of intellectuals in Poland “after Yalta” through the prism of the cinema. The biggest problem of people in the 1950s and 1960s was the lack of a satisfying home. The homes of young intellectuals shown in Polish films are the spectrum of dreams, most often impossible to achieve in real life. Apartments located in multi-family housing estates that immortalized in the Polish feature films between the years 1956–1970 are confirmation of the highest quality of Polish industrial design. Real people’s apartments were cramped, ugly, and primitive.