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Ultraviolet and visible imaging and spectrographic imaging instrument
Applied Optics, 1994The Ultraviolet and Visible Imaging and Spectrographic Imaging experiment consists of five spectrographic imagers and four imagers. These nine sensors provide spectrographic and imaging capabilities from 110 to 900 nm. The spectrographic imagers share an off-axis design in which selectable slits alternate fields of view (1.00° × 0.10° or 1.00° × 0.05°)
J F, Carbary +6 more
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Visibility of structured and unstructured images*
Journal of the Optical Society of America, 1973We define a grain modulation transfer function (MTF) using unstructured grain images. This MTF is found to be similar in shape to the sine-wave MTF, but about 1/25 as sensitive. The higher sensitivity of the one-dimensional sine-wave grating is due to its highly structured pattern.
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Visible/Infrared Imaging on the Rise [In the Spotlight]
IEEE Signal Processing Magazine, 2013The news media recently showed how infrared imagery aided the authorities in capturing the second Boston Marathon bomber suspect, now a significant tool in the public safety arsenal [1]. It also clearly illustrates the progress in infrared hardware technology since Desert Storm in 1991. The images shown were less grainy (noisy) and had more gray scales,
Sherman Karp, Larry B. Stotts
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2021
This chapter is concerned with the acquisition, processing, and display of image data. We will first learn about the physical principles of electromagnetic waves, which include visible light (Sect. 5.2), and then discuss how cameras capture visible light images (Sect. 5.3).
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This chapter is concerned with the acquisition, processing, and display of image data. We will first learn about the physical principles of electromagnetic waves, which include visible light (Sect. 5.2), and then discuss how cameras capture visible light images (Sect. 5.3).
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Reversible Visible Watermarking Technique for Images
2006 International Conference on Image Processing, 2006This paper proposes a reversible visible watermarking algorithm to satisfy a new application scenario where the visible watermark serves as a tag or ownership identifier, but can be completely removed at the receiver end to resume the original image data.
Yongjian Hu, Byeungwoo Jeon
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Calibration of GOES imager visible channels
Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05., 2005Abstract : Four options for the post-launch calibration of GOES Imager visible channel were examined, including those based on the EDF, on desert measurements, on star observations, and on MODIS data. The basic assumptions and methodologies of these options were summarized in this paper, as well as major advantages and disadvantages, from both ...
Xiangqian Wu +6 more
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No Reference Assessment of Image Visibility for Dehazing
2017Haze affects the quality and visibility of the image. Many dehazing algorithms have been developed in recent years. However, the evaluation for the performance of the dehazing method is still not solved. The assessment is not easy to achieve since the reference image is not available.
Manjun Qin +2 more
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Compressing and transmitting visible human images
IEEE Multimedia, 1997We address compression and transmission issues related to images in the National Library of Medicine's Visible Human Project. In total, these images amount to about 235 Gbytes of data, challenging conventional storage, retrieval, and transmission methods. We discuss lossless and lossy methods to compress the images.
George R. Thoma, L. Rodney Long
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Conversion of Infrared Images to Visible in Color
Applied Optics, 1968An ir line scan instrument has been developed that scans a scene simultaneously with three separate spectral regions and produces an image of the scene as a color photograph. The three spectral regions are 0.5-1.0 micro, 3.0-5.5 micro and 8.0-14.0 micro. The ir detectors used are Si, InSb, and Ge:Hg, respectively.
L W, Nichols, J, Lamar
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Comparative visibility analysis of advertisement images
Signal Processing: Image Communication, 2011Is there any advertisement in a particular dataset more visually efficient than the rest? Here we propose that advertisement images may be rank ordered based on their important information visibility using computational attention. For each one of the advertisement images we first compute a multi-bitrate attention map following a rational model of ...
Jose A. García 0001 +3 more
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