101.
Fundamentos de óptica para ingeniería informática: prácticas de laboratorio
- Beléndez Vázquez, Augusto; Neipp López, Cristian; Pascual Villalobos, Inmaculada
102.
A Case of Bilateral Optic Nerve Atrophy
- Thomas N. Hwang, Timothy J. McCulley
Bilateral Optic Atrophy
103.
A Case of Bilateral Optic Nerve Atrophy
- Thomas N. Hwang, Timothy J. McCulley
Bilateral Optic Atrophy
104.
Local Application of Optic Flow to Analyse Rigid versus Non-Rigid Motion
- Alan J. Lipton
Optic flow has been a research topic of interest for many years. It has, until recently, been largely inapplicable to real-time video applications due to its computationally expensive nature. This paper presents a new, reliable flow technique called dynamic region matching, based on the work of Anandan[1], Lucas and Kanade[10] and Okutomi and Kanade[11], which can be combined with a motion detection algorithm (from stationary or stabilised camera image streams) to allow flow-based analyses of moving entities in real-time. If flow vectors need only be calculated for "moving" pixels, then the computation time is greatly reduced, making it applicable to...
105.
Local Application of Optic Flow to Analyse Rigid versus Non-Rigid Motion
- Alan J. Lipton
Optic flow has been a research topic of interest for many years. It has, until recently, been largely inapplicable to realtime video applications due to its computationally expensive nature. This paper presents a new, reliable flow technique called dynamic region matching, based on the work of Anandan[1], Lucas and Kanade[10] and Okutomi and Kanade[11], which can be combined with a motion detection algorithm (from stationary or stabilised camera image streams) to allow flow-based analyses of moving entities in real-time. If flow vectors need only be calculated for "moving" pixels, then the computation time is greatly reduced, making it applicable to...
106.
Local application of optic flow to analyse rigid versus non-rigid motion
- Alan J. Lipton
Optic flow has been a research topic of interest for many years. It has, until recently, been largely inapplicable to realtime video applications due to its computationally expensive nature. This paper presents a new, reliable flow technique called dynamic region matching, based on the work of Anandan[1], Lucas and Kanade[10] and Okutomi and Kanade[11], which can be combined with a motion detection algorithm (from stationary or stabilised camera image streams) to allow flow-based analyses of moving entities in real-time. If flow vectors need only be calculated for “moving ” pixels, then the computation time is greatly reduced, making it applicable...
107.
Compressive optic neuropathy caused by renal osteodystrophy. Case report.
- Digre, Kathleen B.; Schmidt, Richard H.; Osborne, Anne G.; Patel, Bhupendra C.; Pratt, David; Rietz, Lisa A.
Compressive optic neuropathy with acute or chronic vision loss has been associated with various skull base tumors, aneurysms, Graves disease, trauma, and, less commonly, fibrous dysplasia and osteopetrosis. The authors present a case of acute visual deterioration in a 25-year-old woman who had massive calvarial hypertrophy with optic canal stenosis secondary to renal osteodystrophy (uremic leontiasis ossea [ULO]: bighead disease). Significant visual field restoration was achieved with high-dose corticosteroids followed by optic nerve decompression. This is the first case report of cranial neuropathy associated with ULO.
108.
Optic nerve sheath meningioma
- William F. Hoyt, M.D. Professor Emeritus of Ophthalmology, Neurology and Neurosurgery University of California, San Francisco, Department of Ophthalmology
Optic nerve meningioma of right optic nerve. Progressive visual field loss. Notice macular star and ""cotton wool"" spots.
109.
Optic disc swelling from optic glioma
- William F. Hoyt, M.D. Professor Emeritus of Ophthalmology, Neurology and Neurosurgery University of California, San Francisco, Department of Ophthalmology
Optic disc swelling from optic glioma. Note the signs of vein occlusion and the optociliary bypass vien at 4:00. Left eye.
110.
Local application of optic flow to analyse rigid versus non-rigid motion
- Alan J. Lipton
Optic flow has been a research topic of interest for many years. It has, until recently, been largely inapplicable to real-time video applications due to its computationally expensive nature. This paper presents a new, reliable flow technique called dynamic region matching, based on the work of Anandan[1], Lucas and Kanade[10] and Okutomi and Kanade[11], which can be combined with a motion detection algorithm (from stationary or stabilised camera image streams) to allow flow-based analyses of moving entities in real-time. If flow vectors need only be calculated for “moving ” pixels, then the computation time is greatly reduced, making it applicable...
111.
Optic disc swelling from optic glioma
- William F. Hoyt, M.D. Professor Emeritus of Ophthalmology, Neurology and Neurosurgery University of California, San Francisco, Department of Ophthalmology
Left eye. Optic nerve glioma. Disc swelling without visual loss. Same patient as F2b_7
112.
Congenital anomalies of the optic nerve in one family.
- Digre, Kathleen B.; Mamalis, Nick; White, George L. Jr.; Mortenson, Steven
We present three cases of congenital optic disc anomalies in one family who underwent an extensive diagnostic workup to exclude any intracranial pathology. One patient had elevated optic nerve heads and was hospitalized for multiple diagnostic tests including a lumbar puncture and magnetic resonance imaging scan. This patient had a sister with a previous history of having undergone head and orbital computed tomography to evaluate her symptoms of headaches with anomalous optic nerve heads. The third patient was the father of the other two patients who had previously undergone an extensive evaluation for elevated optic nerve heads and was treated...
113.
Pits of the optic disc
- William F. Hoyt, M.D. Professor Emeritus of Ophthalmology, Neurology and Neurosurgery University of California, San Francisco, Department of Ophthalmology
Right eye. Three congenital optic pits on the temporal side. 8:00, 9:30, 10:30.
114.
De novo fenestration of the optic nerve case illustration.
- House, Paul A.; Couldwell, William T.;
Fenestration of the optic nerve or chiasm due to the presence of aneurismal dilation of the internal carotid artery (ICA) has been described. In three out of five cases reviewed recently, the optic nerve was penetrated by an ICA?Çôophthalmic artery aneurysm.3 Penetration of the optic nerve was due to a ruptured anterior communicating artery aneurysm or an aneurysm of the anterior wall of the ICA in the other cases published to date.4,2 Splitting of the optic nerve without the presence of a penetrating aneurysm has not been identified previously.
115.
Propiedades ópticas de CuInSe2 y CuGaSe2 usando DFT
- Rodríguez Martínez, Jairo Arbey; Naranjo Muñoz, Pablo E.
In this work we study the optical properties of the ternary compound CuInSe2 and CuGaSe2 using the DFT and FP-LAPW method. These materials are important to have applications in non lineal optics in the construction of infrared detectors and solar cells polycrystalline based on thin films of high efficiency and low cost where are used like active layer. Therefore, it is important to know so much theoretical as experimentally their optic properties (complex dielectric constant, complex re-fraction index and coefficient of absorption).
116.
Utilidad de la tomografía de coherencia óptica en el edema macular diabético traccional
- Sempere, J.; Abreu, R.; Bandao, F.; Abengoechea, S.
Caso clínico: Se presenta el caso de un paciente varón de 66 años afecto de retinopatía diabética no proliferativa en ambos ojos y edema macular diabético (EMD) con componente traccional en el ojo derecho confirmado por Tomografía de Coherencia Óptica (OCT), así como el resultado después de realizar tratamiento quirúrgico mediante vitrectomía via pars plana y delaminación de la hialoides posterior.
Discusión: La Tomografía de Coherencia Óptica es de utilidad para el diagnóstico, seguimiento y diseño del protocolo quirúrgico en los pacientes afectos de EMD traccional, puesto que nos permite cuantificar la evolución del mismo de una manera no invasiva
117.
An Image Processing Board with an MPEG Processor and Additional Confidence Calculation for Fast and Robust Optic Flow Generation in Real Environments
- N. O. Stöffler; G. Färber; Georg Farber
This paper describes a vision system based on a PCboard which can calculate a sparse but robust optic flow at frame rate. A correlation chip, which was originally designed for MPEG video compression, is used to calculate displacement vectors between blocks of pixels in consecutive frames. The main disadvantage of similar approaches, the noisiness of the displacement field in areas with weak structure, is compensated by a computational inexpensive confidence criterion, which is calculated for each vector in hardware. The performance of the criterion and the improvements in the flow field are demonstrated by experiments. Keywords robot vision, optic flow,...
118.
Método óptico para la caracterización automática de defectos superficiales en hilos metálicos finos
- Sánchez Brea, Luis Miguel
119.
Motion-based filtering of magneto-optic imagers
- Unsang Park A; Lalita Udpa B; George C. Stockman A
The magneto-optic imager (MOI) is a powerful device for the nondestructive inspection (NDI) of aging aircraft. MOI produces analog images of magnetic flux leakage associated with eddy current distribution around surface and subsurface structures. The main advantages of using MOI are its fast inspection speed and easy interpretation compared with conventional Eddy Current NDI instruments. However, due to the magnetic domain wall structures of the sensor, the MOI images are corrupted by noise, which lowers the MOI inspection capabilities. The domain walls produce serpentine pattern noise, which can be reduced by improving the sensor or by use of image processing...
120.
Optic nerve sheath meningioma
- William F. Hoyt, M.D. Professor Emeritus of Ophthalmology, Neurology and Neurosurgery University of California, San Francisco, Department of Ophthalmology
Optic disc swelling due to meningioma. Notice choroidal folds through the macula of left eye.
