Results 21 to 30 of about 38,687,490 (295)

Evaluating noise in digitized radiographic images by means of histogram Avaliação de ruído em imagens radiográficas digitalizadas por meio do histograma

Journal of Applied Oral Science, 2006
To evaluate the performance of three digital devices regarding the noise added to digital radiographic images containing different optical densities.
Izabel Regina Fischer Rubira-Bullen, Maurício Cunha Escarpinati, Homero Schiabel, Marcelo Andrade da Costa Vieira, Fischer Rubira, José Roberto Pereira Lauris   +5 more
doaj   +1 more source

After price competition

Annals of Business Administrative Science, 2019
When a market grows and matures so that its product becomes commoditized, we can usually expect product prices to decline due to price competition. However, in the digital camera market, although prices started to decline after they first went on sale ...
Takeyasu Ichikohji
doaj   +1 more source

Deep Feature Learning for Intrinsic Signature Based Camera Discrimination

Big Data Mining and Analytics, 2022
In this paper we consider the problem of "end-to-end" digital camera identification by considering sequence of images obtained from the cameras. The problem of digital camera identification is harder than the problem of identifying its analog counterpart
Chaity Banerjee, Tharun Kumar Doppalapudi, Eduardo Pasiliao, Tathagata Mukherjee   +3 more
doaj   +1 more source

Novel interfaces for digital cameras and camera phones [PDF]

Proceedings of the 12th international conference on Human computer interaction with mobile devices and services, 2010
Camera phones are now very common but there are some usability issues that affect their use. These can occur because the users look through the LCD to frame the image and can often miss the icons displayed around the edges that present important information about the status of the camera. This may lead to shots being missed or poorly exposed.
Christopher McAdam, Craig Pinkerton, Stephen A. Brewster   +2 more
openaire   +1 more source

Optics and Utility of Low-Cost Smartphone-Based Portable Digital Fundus Camera System for Screening of Retinal Diseases

Diagnostics, 2022
Purpose: To describe optical principles and utility of inexpensive, portable, non-contact digital smartphone-based camera for the acquisition of fundus photographs for the evaluation of retinal disorders.
K. V. Chalam, Joud Chamchikh, Suzie Gasparian   +2 more
doaj   +1 more source

Accuracy research on coded levelling staff using digital photos

Geodesy and Cartography, 2012
The article introduces accuracy research on coded levelling staff using digital photos. The principles of photogrammetry can be used for comparing the views of the etalon and meter to be calibrated.
Vladislovas Česlovas Aksamitauskas, Donatas Rekus   +1 more
doaj   +1 more source

Derivation of High Spatial Resolution Albedo from UAV Digital Imagery: Application over the Greenland Ice Sheet

Frontiers in Earth Science, 2017
Measurements of albedo are a prerequisite for modeling surface melt across the Earth's cryosphere, yet available satellite products are limited in spatial and/or temporal resolution.
Jonathan C. Ryan, Alun Hubbard, Alun Hubbard, Jason E. Box, Stephen Brough, Stephen Brough, Karen Cameron, Joseph M. Cook, Matthew Cooper, Samuel H. Doyle, Arwyn Edwards, Tom Holt, Tristram Irvine-Fynn, Christine Jones, Lincoln H. Pitcher, Asa K. Rennermalm, Laurence C. Smith, Marek Stibal, Neal Snooke   +18 more
doaj   +1 more source

Identifying the Digital Camera from Natural Images Using Residual Noise and the Jensen–Shannon Divergence

Journal of Electrical and Computer Engineering, 2022
Regarding the problem of digital camera identification, many methods have been proposed, and for several of them, their effectiveness has been verified on the basis of disputed flat images.
Francisco Rodríguez-Santos, Ana L. Quintanar-Reséndiz, Guillermo Delgado-Gutiérrez, Leonardo Palacios-Luengas, Omar Jiménez-Ramírez, Rubén Vázquez-Medina   +5 more
doaj   +1 more source

Optimization of seminal extracellular vesicle isolation protocols for cancer biomarker analysis using proteomic profiling

Molecular Oncology, EarlyView.
This paper shows that size‐exclusion chromatography and sequential centrifugation applied to seminal plasma enrich for different populations of extracellular vesicles. This may significantly affect the detection and analysis of extracellular vesicle‐associated cancer biomarkers.
Elen Telumyan, Beatriz Martín‐Gracia, Eva Bassols‐Citores, Krizia Sagini, Maria K. Andersen, Tuula A. Nyman, May‐Britt Tessem, Morten B. Rye, Alicia Llorente   +8 more
wiley   +1 more source

Beyond photography: Evaluation of the consumer digital camera to identify strabismus and anisometropia by analyzing the Bruckner′s reflex

Indian Journal of Ophthalmology, 2013
Amblyopia screening is often either costly or laborious. We evaluated the Canon Powershot TX1 (CPTX1) digital camera as an efficient screener for amblyogenic risk factors (ARF). We included 138 subjects: 84-amblyopes and 54-normal.
Sadat A. O. Bani, Abadan K Amitava, Richa Sharma, Alam Danish   +3 more
doaj   +1 more source