Results 41 to 50 of about 2,327,998 (70)
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Xeromammographic image quality
Medical Physics, 1980Xeroradiography is a diagnostic modality whose image‐forming properties are fundamentally different from those of the conventional silver halide process. In this work, the xeromammographic process, representing the low‐contrast limit of xeroradiography, is analyzed in detail.
Cheng C. Kao +2 more
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Image quality in image classification: Design and construction of an image quality database
Computers & Chemical Engineering, 2009Image quality affects automated classification of images from process camera monitors. The objective of this work was to obtain a database of reference images that could enable automated, customized image quality modification to improve classification of new images.
Stephen T. Balke, Shuo Yan, Saed Sayad
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Evaluation of image quality in tomographic imaging
Physics in Medicine & Biology, 1977Modulation Transfer Functions (MTF) for tomographic imaging with linear, circular, hypocycloidal and spiral motion are given. They may be determined experimentally from tomographs of slits or line pair test patterns. In some cases calculation of the MTF from the blur pattern by Fourier transformation is possible.
Angerstein W, Stargardt A, Wolf M
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From image quality to patch quality: An Image-Patch Model for No-Reference image quality assessment
2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2017Supervised learning is gradually used for image quality assessment (IQA). For the patch-based methods, the ‘ground truth’ quality of patches is essential for training, but in practice it's easy to obtain the ground truth quality of images rather than patches.
Wen Heng, Tingting Jiang
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Clinical Physics and Physiological Measurement, 1990
The measurement of image quality is an essential stage in the evaluation of imaging techniques. Yet there is no accepted way of quantitatively assessing image quality. Current theories suggest that the quality of the raw data acquired by the device can be assessed independently from that of the displayed image.
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The measurement of image quality is an essential stage in the evaluation of imaging techniques. Yet there is no accepted way of quantitatively assessing image quality. Current theories suggest that the quality of the raw data acquired by the device can be assessed independently from that of the displayed image.
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Image Contrast and Quality [PDF]
, 1990 This laboratory demonstrates: (1) the two major types of contrast in SEM images, known as atomic number contrast and topographic contrast, (2) the factors affecting the quality of the image and how they ultimately limit the image resolution, and (3) the effects of electronic signal processing on the visibility of features in the image. More details and
John T. Armstrong +10 more
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A Novel Image Quality Index for Image Quality Assessment
2013Image quality assessment (IQA) is provided as computational models to measure the quality of images in perceptually consistent manner. In this paper, a novel image quality index with highlighting shape of histogram of the image targeted is introduced to assess image qualities.
Xu Huang +2 more
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Applied Optics, 1967
The steps in reproducing evaporograph images are discussed. An analysis of signal and noise is given for different stages of the evaporograph process. The factors which limit the threshold sensitivity and resolving power of the evaporograph transducer are determined.
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The steps in reproducing evaporograph images are discussed. An analysis of signal and noise is given for different stages of the evaporograph process. The factors which limit the threshold sensitivity and resolving power of the evaporograph transducer are determined.
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The semantics of image quality
Color and Imaging Conference, 1997Using an "infonnation-processing" approach we give a semantic description of image quality. Experimental evidence for this description, which allows one to meaningfully characterize the quality of an image as the degree to whieh the image can be successfully exploited by the observer, will be discussed.
Janssen, T.J.W.M., Blommaert, F.J.J.
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Continuous Assessment of Image Quality
SMPTE Journal, 1997This paper addresses the question of whether subjects are able to assess the perceived time-varying quality of video sequences continuously. To this end, a method is used in which subjects continuously indicate the perceived image quality by moving a slider along a graphical scale.
de H Huib Ridder, Roelof Hamberg
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