An Objective Comparison of 35-mm Film and Digital Camera Image Quality: A New Gold Standard

2009 ◽  
Vol 11 (3) ◽  
Author(s):  
Grant S. Hamilton
Keyword(s):  
Image Quality ◽  
Gold Standard ◽  
Digital Camera ◽  
Camera Image

scholarly journals A simulation tool for evaluating digital camera image quality

2003 ◽  
Author(s):  
Joyce E. Farrell ◽  
Feng Xiao ◽  
Peter B. Catrysse ◽  
Brian A. Wandell
Keyword(s):  
Image Quality ◽  
Digital Camera ◽  
Simulation Tool ◽  
Camera Image

Evaluation Method of Digital Camera Image Quality Based on Chinese Characters Testing Chart

2013 ◽  
Vol 33 (1) ◽  
pp. 0112003 ◽  
Author(s):  
李振杰 Li Zhenjie ◽  
周桃庚 Zhou Taogeng ◽  
朱泰然 Zhu Tairan ◽  
刘琳 Liu lin ◽  
李桂萍 Li Guiping ◽  
...  
Keyword(s):  
Image Quality ◽  
Evaluation Method ◽  
Digital Camera ◽  
Chinese Characters ◽  
Camera Image

A simple method for evaluating image quality of screen-film system using a high-performance digital camera

2009 ◽  
Author(s):  
Naotoshi Fujita ◽  
Asumi Yamazaki ◽  
Katsuhiro Ichikawa ◽  
Yoshie Kodera
Keyword(s):  
Image Quality ◽  
High Performance ◽  
Digital Camera ◽  
Film System ◽  
Simple Method

scholarly journals Agreement in the diagnosis of dental fluorosis in central incisors performed by a standardized photographic method and clinical examination

2009 ◽  
Vol 25 (5) ◽  
pp. 1017-1024 ◽  
Author(s):  
Carolina Castro Martins ◽  
Loliza Chalub ◽  
Ynara Bosco Lima-Arsati ◽  
Isabela Almeida Pordeus ◽  
Saul Martins Paiva
Keyword(s):  
Positive Predictive Value ◽  
Negative Predictive Value ◽  
Clinical Examination ◽  
Predictive Value ◽  
Gold Standard ◽  
Dental Fluorosis ◽  
Digital Camera ◽  
High Specificity ◽  
Photographic Method ◽  
Pediatric Dentists

The aim of this study was to assess agreement in the diagnosis of dental fluorosis performed by a standardized digital photographic method and a clinical examination (gold standard). 49 children (aged 7-9 years) were clinically evaluated by a trained examiner for the assessment of dental fluorosis. Central incisors were evaluated for the presence or absence of dental fluorosis and were photographed with a digital camera. Photographs were presented to three pediatric dentists, who examined the images. Data were analyzed using Cohen's kappa and validity values. Agreement in the diagnosis performed by the photographic method and clinical examination was good (0.67) and accuracy was 83.7%. The prevalence of dental fluorosis was reported to be higher in the clinical examination (49%) compared with the photographic method (36.7%). The photographic method presented higher specificity (96%) than sensitivity (70.8%), a positive predictive value (PPV) of 94.4% and a negative predictive value (NPV) of 77.4%. The diagnosis of dental fluorosis performed using the photographic method presented high specificity and PPV, which indicates that the method is reproducible and reliable for recording dental fluorosis.

Image quality degradation of object-color metamer mismatching in digital camera color reproduction

2018 ◽  
Vol 57 (11) ◽  
pp. 2851 ◽  
Author(s):  
Jueqin Qiu ◽  
Haisong Xu ◽  
Zhengnan Ye ◽  
Changyu Diao
Keyword(s):  
Image Quality ◽  
Digital Camera ◽  
Color Reproduction ◽  
Quality Degradation

Assessment of 3D-TOF-MRA at 3.0 tesla in the characterization of the angioarchitecture of cerebral arteriovenous malformations: a preliminary study

2007 ◽  
Vol 48 (6) ◽  
pp. 678-686 ◽  
Author(s):  
J. O. Heidenreich ◽  
A. M. Schilling ◽  
F. Unterharnscheidt ◽  
R. Stendel ◽  
S. Hartlieb ◽  
...  
Keyword(s):  
Image Quality ◽  
Gold Standard ◽  
Signal To Noise Ratio ◽  
Brain Arteriovenous Malformation ◽  
3.0 Tesla ◽  
Detection Rates ◽  
Tof Mra ◽  
Preliminary Study

Background: The characterization of brain arteriovenous malformation (AVM) angioarchitecture remains rewarding in planning and predicting therapy. The increased signal-to-noise ratio at higher field strength has been found advantageous in vascular brain pathologies. Purpose: To evaluate whether 3.0T time-of-flight (TOF) magnetic resonance angiography (MRA) is superior to 1.5T TOF-MRA for the characterization of cerebral AVMs. Material and Methods: Fifteen patients with AVM underwent TOF-MRA at 3.0T and 1.5T and catheter angiography (DSA), which was used as the gold standard. Blinded readers scored image quality on a four-point scale, nidus size, and number of feeding arteries and draining veins. Results: Image quality of TOF-MRA at 3.0T was superior to 1.5T but still inferior to DSA. Evaluation of nidus size was equally good at 3.0T and 1.5T for all AVMs. In small AVMs, however, there was a tendency of size overestimation at 3.0T. MRA at 3.0T had increased detection rates for feeding arteries (+21%) and superficial (+13%) and deep draining veins (+33%) over 1.5T MRA. Conclusion: 3.0T TOF-MRA offers superior characterization of AVM angioarchitecture compared with 1.5T TOF-MRA. The image quality of MRA at both 3.0 and 1.5T is still far from equal to DSA, which remains the gold standard for characterization of AVM.

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