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Girija G - One of the best experts on this subject based on the ideXlab platform.

  • Experimental Study with Enhanced Vision System Prototype Unit
    2016
    Co-Authors: Vps Naidu, Narayana Rao P, Sudesh K Kashyap, Shanthakuma N, Girija G
    Abstract:

    Abstract — The National Civil Aircraft (NCA) being developed at National Aerospace Laboratories (NAL) is expected to have the capability of operation from airports with minimal infrastructure and instrumentation facility under all-weather conditions. The key enabling technology for this is an Integrated Enhanced and Synthetic Vision System (IESVS), which is a combination of Enhanced Vision System (EVS), Synthetic Vision System (SVS), and Head-Up Display. A prototype of EVS consisting of Forward Looking Infrared (FLIR) camera and CCD color camera is developed and tested at NAL. A Simulink block is developed to acquire the image data in real time (online) from a four channel Frame Grabber. An image fusion algorithm based on wavelets is developed to fuse the images from CCD and FLIR cameras. The affine transform used for image registration is computed by selecting the control points from both CCD and FLIR images. Test results from the experiments conducted on the runway during day and night (runway lights ON/OFF) conditions are presented

  • CSIR-National Aerospace Laboratories
    2016
    Co-Authors: Vps Naidu, Narayana Rao P, Sudesh K Kashyap, Shanthakuma N, Girija G
    Abstract:

    Abstract—The National Civil Aircraft (NCA) being developed at National Aerospace Laboratories (NAL) is expected to have the capability of operation from airports with minimal infrastructure and instrumentation facility under all-weather conditions. The key enabling technology for this is an Integrated Enhanced and Synthetic Vision System (IESVS), which is a combination of Enhanced Vision System (EVS), Synthetic Vision System (SVS), and Head-Up Display. A prototype of EVS consisting of Forward Looking Infra Red (FLIR) camera and CCD color camera is developed and tested at NAL. A Simulink block is developed to acquire the image data in real time (online) from a four channel Frame Grabber. An image fusion algorithm based on wavelets is developed to fuse the images from CCD and FLIR cameras. The affine transform used for image registration is computed by selecting the control points from both CCD and FLIR images. Test results from the experiments conducted on the runway during day and night (runway lights ON/OFF) conditions are presented. I

  • Experimental Study with Enhanced Vision System\ud Prototype Unit- poster
    2011
    Co-Authors: Naidu Vps, Sudesh K Kashyap, Shanthakuma N, Rao, Narayana P, Girija G
    Abstract:

    The National Civil Aircraft (NCA) being\ud developed at National Aerospace Laboratories (NAL) is\ud expected to have the capability of operation from airports\ud with minimal infrastructure and instrumentation facility\ud under all-weather conditions. The key enabling technology\ud for this is an Integrated Enhanced and Synthetic Vision\ud System (IESVS), which is a combination of Enhanced\ud Vision System (EVS), Synthetic Vision System (SVS), and\ud Head-Up Display. A prototype of EVS consisting of\ud Forward Looking Infrared (FLIR) camera and CCD color\ud camera is developed and tested at NAL. A Simulink block\ud is developed to acquire the image data in real time (online)\ud from a four channel Frame Grabber. An image fusion\ud algorithm based on wavelets is developed to fuse the\ud images from CCD and FLIR cameras. The affine\ud transform used for image registration is computed by\ud selecting the control points from both CCD and FLIR\ud images. Test results from the experiments conducted on\ud the runway during day and night (runway lights ON/OFF)\ud conditions are presented

  • Experimental Study with Enhanced Vision System\ud Prototype Unit
    2011
    Co-Authors: Naidu Vps, Narayana Rao P, Sudesh K Kashyap, Shanthakuma N, Girija G
    Abstract:

    The National Civil Aircraft (NCA) being\ud developed at National Aerospace Laboratories (NAL) is\ud expected to have the capability of operation from airports\ud with minimal infrastructure and instrumentation facility\ud under all-weather conditions. The key enabling technology\ud for this is an Integrated Enhanced and Synthetic Vision\ud System (IESVS), which is a combination of Enhanced\ud Vision System (EVS), Synthetic Vision System (SVS), and\ud Head-Up Display. A prototype of EVS consisting of\ud Forward Looking Infrared (FLIR) camera and CCD color\ud camera is developed and tested at NAL. A Simulink block\ud is developed to acquire the image data in real time (online)\ud from a four channel Frame Grabber. An image fusion\ud algorithm based on wavelets is developed to fuse the\ud images from CCD and FLIR cameras. The affine\ud transform used for image registration is computed by\ud selecting the control points from both CCD and FLIR\ud images. Test results from the experiments conducted on\ud the runway during day and night (runway lights ON/OFF)\ud conditions are presented

Demetrios Okkalides - One of the best experts on this subject based on the ideXlab platform.

  • perception of detail and greyscale range in x ray fluoroscopy images captured with a personal computer and Frame Grabber
    European Journal of Radiology, 1996
    Co-Authors: Demetrios Okkalides
    Abstract:

    Abstract Objective : To assess the dynamic range of radiological images captured with a personal computer Frame-grabbing system coupled to an X-ray fluoroscopy machine. Methods : A 386DX-40 MHz, IBM compatible, computer with an SVGA monochrome graphics subsystem and a 387 co-processor, installed with a Screen Machine Frame-Grabber and controlled by a program specially written was used. Various systems were examined and the observer's perceptions of the results assessed. Results : The dynamic range available to an ordinary X-ray fluoroscopy system was found to be restricted to about 750 mV. Similar measurements showed that the dynamic range was always restricted to 3/4–1/2 of the full available signal because of a high value of the dark voltage of the TV camera's target on all seven systems measured. The dynamic range of the computer — Frame Grabber system was found to be significantly wider than the Image Intensifier — TV camera chain but, surprisingly, it was affected by the type of file format used for image storing on disk. Clinical images from a barium meal examination as well as CT images captured after optimisation of the Frame-Grabber were found to contain large quantities of noise in the first two least significant bit planes making them redundant and limiting the grey levels needed for image display to less than 64. This number was also less than the 80 grey levels that could be discriminated by the human eye on the computer monitor. Conclusions : It was concluded that 6 bit digitisation would have been sufficient for image capture. The advantages of the wider dynamic range of the Frame-Grabber and the processing capabilities of the computer were tested for the possibility of improving the perception of detail. However, the results were negative. The limiting spatial resolution measured with a variable density bar pattern at all magnifications was about 0.4 lp/mm lower from that measured directly on the fluoroscopic screen. A detail perception test had the same result. The perception success was significantly lower with the digital images at all but the highest of the exposure rates and despite the use of image processing filters.

  • assessment of target recovery after tv camera saturation in x ray fluoroscopy using a personal computer with Frame Grabber
    British Journal of Radiology, 1996
    Co-Authors: Demetrios Okkalides
    Abstract:

    Abstract X-ray fluoroscopy images were digitized with a personal computer and Frame-Grabber system. This system was used to measure the recovery from saturation of the target of a TV camera by calculating the time at which contrast falls to 50% (C½). This measurement was performed on images of: (a) a rotating lead disk with a slit at its side and (b) a square hole in a thick lead sheet. These images represented the moving (MOTR) and stationary (SOTR) object target recovery. The SOTR method produced much higher C½ values in two mobile fluoroscopy systems used for cardiac catheterizations where waveforms permitted the application of both methods. The SOTR method was also applied to three additional fluoroscopy systems. It was found that, contrary to expectations, C½ increased with exposure rate in all five machines. Target recovery characteristics of the machines tested, represented by the gradient of C½ against exposure rate, were found to increase with inherent noise level measured in the vidicon camera t...

Sudesh K Kashyap - One of the best experts on this subject based on the ideXlab platform.

  • Experimental Study with Enhanced Vision System Prototype Unit
    2016
    Co-Authors: Vps Naidu, Narayana Rao P, Sudesh K Kashyap, Shanthakuma N, Girija G
    Abstract:

    Abstract — The National Civil Aircraft (NCA) being developed at National Aerospace Laboratories (NAL) is expected to have the capability of operation from airports with minimal infrastructure and instrumentation facility under all-weather conditions. The key enabling technology for this is an Integrated Enhanced and Synthetic Vision System (IESVS), which is a combination of Enhanced Vision System (EVS), Synthetic Vision System (SVS), and Head-Up Display. A prototype of EVS consisting of Forward Looking Infrared (FLIR) camera and CCD color camera is developed and tested at NAL. A Simulink block is developed to acquire the image data in real time (online) from a four channel Frame Grabber. An image fusion algorithm based on wavelets is developed to fuse the images from CCD and FLIR cameras. The affine transform used for image registration is computed by selecting the control points from both CCD and FLIR images. Test results from the experiments conducted on the runway during day and night (runway lights ON/OFF) conditions are presented

  • CSIR-National Aerospace Laboratories
    2016
    Co-Authors: Vps Naidu, Narayana Rao P, Sudesh K Kashyap, Shanthakuma N, Girija G
    Abstract:

    Abstract—The National Civil Aircraft (NCA) being developed at National Aerospace Laboratories (NAL) is expected to have the capability of operation from airports with minimal infrastructure and instrumentation facility under all-weather conditions. The key enabling technology for this is an Integrated Enhanced and Synthetic Vision System (IESVS), which is a combination of Enhanced Vision System (EVS), Synthetic Vision System (SVS), and Head-Up Display. A prototype of EVS consisting of Forward Looking Infra Red (FLIR) camera and CCD color camera is developed and tested at NAL. A Simulink block is developed to acquire the image data in real time (online) from a four channel Frame Grabber. An image fusion algorithm based on wavelets is developed to fuse the images from CCD and FLIR cameras. The affine transform used for image registration is computed by selecting the control points from both CCD and FLIR images. Test results from the experiments conducted on the runway during day and night (runway lights ON/OFF) conditions are presented. I

  • Experimental Study with Enhanced Vision System\ud Prototype Unit- poster
    2011
    Co-Authors: Naidu Vps, Sudesh K Kashyap, Shanthakuma N, Rao, Narayana P, Girija G
    Abstract:

    The National Civil Aircraft (NCA) being\ud developed at National Aerospace Laboratories (NAL) is\ud expected to have the capability of operation from airports\ud with minimal infrastructure and instrumentation facility\ud under all-weather conditions. The key enabling technology\ud for this is an Integrated Enhanced and Synthetic Vision\ud System (IESVS), which is a combination of Enhanced\ud Vision System (EVS), Synthetic Vision System (SVS), and\ud Head-Up Display. A prototype of EVS consisting of\ud Forward Looking Infrared (FLIR) camera and CCD color\ud camera is developed and tested at NAL. A Simulink block\ud is developed to acquire the image data in real time (online)\ud from a four channel Frame Grabber. An image fusion\ud algorithm based on wavelets is developed to fuse the\ud images from CCD and FLIR cameras. The affine\ud transform used for image registration is computed by\ud selecting the control points from both CCD and FLIR\ud images. Test results from the experiments conducted on\ud the runway during day and night (runway lights ON/OFF)\ud conditions are presented

  • Experimental Study with Enhanced Vision System\ud Prototype Unit
    2011
    Co-Authors: Naidu Vps, Narayana Rao P, Sudesh K Kashyap, Shanthakuma N, Girija G
    Abstract:

    The National Civil Aircraft (NCA) being\ud developed at National Aerospace Laboratories (NAL) is\ud expected to have the capability of operation from airports\ud with minimal infrastructure and instrumentation facility\ud under all-weather conditions. The key enabling technology\ud for this is an Integrated Enhanced and Synthetic Vision\ud System (IESVS), which is a combination of Enhanced\ud Vision System (EVS), Synthetic Vision System (SVS), and\ud Head-Up Display. A prototype of EVS consisting of\ud Forward Looking Infrared (FLIR) camera and CCD color\ud camera is developed and tested at NAL. A Simulink block\ud is developed to acquire the image data in real time (online)\ud from a four channel Frame Grabber. An image fusion\ud algorithm based on wavelets is developed to fuse the\ud images from CCD and FLIR cameras. The affine\ud transform used for image registration is computed by\ud selecting the control points from both CCD and FLIR\ud images. Test results from the experiments conducted on\ud the runway during day and night (runway lights ON/OFF)\ud conditions are presented

Shanthakuma N - One of the best experts on this subject based on the ideXlab platform.

  • Experimental Study with Enhanced Vision System Prototype Unit
    2016
    Co-Authors: Vps Naidu, Narayana Rao P, Sudesh K Kashyap, Shanthakuma N, Girija G
    Abstract:

    Abstract — The National Civil Aircraft (NCA) being developed at National Aerospace Laboratories (NAL) is expected to have the capability of operation from airports with minimal infrastructure and instrumentation facility under all-weather conditions. The key enabling technology for this is an Integrated Enhanced and Synthetic Vision System (IESVS), which is a combination of Enhanced Vision System (EVS), Synthetic Vision System (SVS), and Head-Up Display. A prototype of EVS consisting of Forward Looking Infrared (FLIR) camera and CCD color camera is developed and tested at NAL. A Simulink block is developed to acquire the image data in real time (online) from a four channel Frame Grabber. An image fusion algorithm based on wavelets is developed to fuse the images from CCD and FLIR cameras. The affine transform used for image registration is computed by selecting the control points from both CCD and FLIR images. Test results from the experiments conducted on the runway during day and night (runway lights ON/OFF) conditions are presented

  • CSIR-National Aerospace Laboratories
    2016
    Co-Authors: Vps Naidu, Narayana Rao P, Sudesh K Kashyap, Shanthakuma N, Girija G
    Abstract:

    Abstract—The National Civil Aircraft (NCA) being developed at National Aerospace Laboratories (NAL) is expected to have the capability of operation from airports with minimal infrastructure and instrumentation facility under all-weather conditions. The key enabling technology for this is an Integrated Enhanced and Synthetic Vision System (IESVS), which is a combination of Enhanced Vision System (EVS), Synthetic Vision System (SVS), and Head-Up Display. A prototype of EVS consisting of Forward Looking Infra Red (FLIR) camera and CCD color camera is developed and tested at NAL. A Simulink block is developed to acquire the image data in real time (online) from a four channel Frame Grabber. An image fusion algorithm based on wavelets is developed to fuse the images from CCD and FLIR cameras. The affine transform used for image registration is computed by selecting the control points from both CCD and FLIR images. Test results from the experiments conducted on the runway during day and night (runway lights ON/OFF) conditions are presented. I

  • Experimental Study with Enhanced Vision System\ud Prototype Unit- poster
    2011
    Co-Authors: Naidu Vps, Sudesh K Kashyap, Shanthakuma N, Rao, Narayana P, Girija G
    Abstract:

    The National Civil Aircraft (NCA) being\ud developed at National Aerospace Laboratories (NAL) is\ud expected to have the capability of operation from airports\ud with minimal infrastructure and instrumentation facility\ud under all-weather conditions. The key enabling technology\ud for this is an Integrated Enhanced and Synthetic Vision\ud System (IESVS), which is a combination of Enhanced\ud Vision System (EVS), Synthetic Vision System (SVS), and\ud Head-Up Display. A prototype of EVS consisting of\ud Forward Looking Infrared (FLIR) camera and CCD color\ud camera is developed and tested at NAL. A Simulink block\ud is developed to acquire the image data in real time (online)\ud from a four channel Frame Grabber. An image fusion\ud algorithm based on wavelets is developed to fuse the\ud images from CCD and FLIR cameras. The affine\ud transform used for image registration is computed by\ud selecting the control points from both CCD and FLIR\ud images. Test results from the experiments conducted on\ud the runway during day and night (runway lights ON/OFF)\ud conditions are presented

  • Experimental Study with Enhanced Vision System\ud Prototype Unit
    2011
    Co-Authors: Naidu Vps, Narayana Rao P, Sudesh K Kashyap, Shanthakuma N, Girija G
    Abstract:

    The National Civil Aircraft (NCA) being\ud developed at National Aerospace Laboratories (NAL) is\ud expected to have the capability of operation from airports\ud with minimal infrastructure and instrumentation facility\ud under all-weather conditions. The key enabling technology\ud for this is an Integrated Enhanced and Synthetic Vision\ud System (IESVS), which is a combination of Enhanced\ud Vision System (EVS), Synthetic Vision System (SVS), and\ud Head-Up Display. A prototype of EVS consisting of\ud Forward Looking Infrared (FLIR) camera and CCD color\ud camera is developed and tested at NAL. A Simulink block\ud is developed to acquire the image data in real time (online)\ud from a four channel Frame Grabber. An image fusion\ud algorithm based on wavelets is developed to fuse the\ud images from CCD and FLIR cameras. The affine\ud transform used for image registration is computed by\ud selecting the control points from both CCD and FLIR\ud images. Test results from the experiments conducted on\ud the runway during day and night (runway lights ON/OFF)\ud conditions are presented

Naidu Vps - One of the best experts on this subject based on the ideXlab platform.

  • Experimental Study with Enhanced Vision System\ud Prototype Unit- poster
    2011
    Co-Authors: Naidu Vps, Sudesh K Kashyap, Shanthakuma N, Rao, Narayana P, Girija G
    Abstract:

    The National Civil Aircraft (NCA) being\ud developed at National Aerospace Laboratories (NAL) is\ud expected to have the capability of operation from airports\ud with minimal infrastructure and instrumentation facility\ud under all-weather conditions. The key enabling technology\ud for this is an Integrated Enhanced and Synthetic Vision\ud System (IESVS), which is a combination of Enhanced\ud Vision System (EVS), Synthetic Vision System (SVS), and\ud Head-Up Display. A prototype of EVS consisting of\ud Forward Looking Infrared (FLIR) camera and CCD color\ud camera is developed and tested at NAL. A Simulink block\ud is developed to acquire the image data in real time (online)\ud from a four channel Frame Grabber. An image fusion\ud algorithm based on wavelets is developed to fuse the\ud images from CCD and FLIR cameras. The affine\ud transform used for image registration is computed by\ud selecting the control points from both CCD and FLIR\ud images. Test results from the experiments conducted on\ud the runway during day and night (runway lights ON/OFF)\ud conditions are presented

  • Experimental Study with Enhanced Vision System\ud Prototype Unit
    2011
    Co-Authors: Naidu Vps, Narayana Rao P, Sudesh K Kashyap, Shanthakuma N, Girija G
    Abstract:

    The National Civil Aircraft (NCA) being\ud developed at National Aerospace Laboratories (NAL) is\ud expected to have the capability of operation from airports\ud with minimal infrastructure and instrumentation facility\ud under all-weather conditions. The key enabling technology\ud for this is an Integrated Enhanced and Synthetic Vision\ud System (IESVS), which is a combination of Enhanced\ud Vision System (EVS), Synthetic Vision System (SVS), and\ud Head-Up Display. A prototype of EVS consisting of\ud Forward Looking Infrared (FLIR) camera and CCD color\ud camera is developed and tested at NAL. A Simulink block\ud is developed to acquire the image data in real time (online)\ud from a four channel Frame Grabber. An image fusion\ud algorithm based on wavelets is developed to fuse the\ud images from CCD and FLIR cameras. The affine\ud transform used for image registration is computed by\ud selecting the control points from both CCD and FLIR\ud images. Test results from the experiments conducted on\ud the runway during day and night (runway lights ON/OFF)\ud conditions are presented

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