Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Brian Keelan"'
Publikováno v:
Augmented Vision and Reality ISBN: 9783319296098
Image sensors are a critical part of camera monitor systems (CMS). Photons passing through the imaging lens impinge upon microlenses that focus the light through color filters and onto the sensor pixel photodiodes. Two principal sensor architectures
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70ebb77b63f2956e7eab89d163f60749
https://doi.org/10.1007/978-3-319-29611-1_5
https://doi.org/10.1007/978-3-319-29611-1_5
Publikováno v:
Digital Photography
An observer study was run to determine the detection thresholds of several representative examples of column fixed pattern noise, in the presence of varying levels of shot noise, which is known to mask structured noise. The data obtained were fit wel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67ee778b6eb7a1495141e593121e9b69
https://doi.org/10.1117/12.909588
https://doi.org/10.1117/12.909588
Autor:
Honghong Peng, Brian Keelan
Publikováno v:
Digital Photography
Sensor yield is directly related to the probability of defective pixel occurrence and the screening criteria. Assuming a spatially independent distribution of single pixel defects, effective on-the-fly correction of singlepixel defects in a color pla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c3fa4bced59f28456c50b129a0721183
https://doi.org/10.1117/12.912142
https://doi.org/10.1117/12.912142
Publikováno v:
SPIE Proceedings.
A system simulation model was used to create scene-dependent noise masks that reflect current performance of mobile phone cameras. Stimuli with different overall magnitudes of noise and with varying mixtures of red, green, blue, and luminance noises
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1983a7b2b3defacfa06383e59121b16a
https://doi.org/10.1117/12.871633
https://doi.org/10.1117/12.871633
Autor:
Brian Keelan, Robin B. Jenkin
Publikováno v:
SPIE Proceedings.
Noise Power Spectra (NPS) are traditionally measured using uniform areas of tone. Adaptive algorithms, such as noise reduction, demosaicing, and sharpening, can modify their behavior based on underlying image structure. In particular, noise reduction
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58c86f23fe17db71f733ef0cc9ecaffe
https://doi.org/10.1117/12.871848
https://doi.org/10.1117/12.871848
Autor:
Brian Keelan
Publikováno v:
SPIE Proceedings.
The image structure quality resulting from several CMOS pixel structures (conventional, backside-illuminated, and diagonally oriented) has been compared using three complimentary techniques: (1) objective measurements of noise equivalent quanta (NEQ)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc6a4cc3430899e784d1dc14e415d6e2
https://doi.org/10.1117/12.862523
https://doi.org/10.1117/12.862523
Autor:
Cheng Lu, Kartik Venkataraman, Robert H. Mullis, Brian Keelan, Junqing Chen, Pravin Rao, Dan Lelescu
Publikováno v:
Applications of Digital Image Processing XXXII.
We describe a solution for image restoration in a computational camera known as an extended depth of field (EDOF) system. The specially-designed optics produce point spread functions that are roughly invariant with object distance in a range. However
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::155659df1518a6d203eed6325e8d75eb
https://doi.org/10.1117/12.824623
https://doi.org/10.1117/12.824623
Publikováno v:
SPIE Proceedings.
A softcopy quality ruler method was implemented for the International Imaging Industry Association (I3A) Camera Phone Image Quality (CPIQ) Initiative. This work extends ISO 20462 Part 3 by virtue of creating reference digital images of known subjecti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::adfd03a7693137f3e98d19bd18a1bdda
https://doi.org/10.1117/12.805922
https://doi.org/10.1117/12.805922
Autor:
Brian Keelan, Elaine W. Jin
Publikováno v:
SPIE Proceedings.
Weighting of field heights is important in cases when a single numerical value needs to be calculated that characterizes an attribute's overall impact on perceived image quality. In this paper we report an observer study to derive the weighting of fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e62eb1a62ab3f565f927149884a9d70e
https://doi.org/10.1117/12.805628
https://doi.org/10.1117/12.805628
Autor:
Brian Keelan
Publikováno v:
Handbook of Image Quality ISBN: 9780824707705
Handbook of Image Quality: Characterization and Prediction
Handbook of Image Quality: Characterization and Prediction
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47b69472390bcbc23b990561c3296d01
https://doi.org/10.1201/9780203910825.ch28
https://doi.org/10.1201/9780203910825.ch28