Results 261 to 270 of about 18,757 (301)

Fuzzy entropy based interactive enhancement of radiographic images

Journal of Medical Engineering & Technology, 2007
In certain radiographic images, fuzziness exists due to the vague nature of image characteristics and limitations of visual perception. Accordingly, a gap exists between the information content of an image and the information that can be retrieved. In this paper, a new fuzzy logic based intensification operator has been proposed for enhancement of ...
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Statistical contrast enhancement of subtraction images for radiographic caries diagnosis

Oral Surgery, Oral Medicine, Oral Pathology, 1982
The effects of the nonlinear contrast-enhancement technique are examined in terms of diagnostic performance obtainable from subtracted dental radiographs for a variety of simulated exposures. Conventional bitewing radiographs of patients known to be free of caries were digitized by means of a computer interfaced with a conventional television camera ...
H G, Gröndahl, K, Gröndahl, T, Okano, R L, Webber   +3 more
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Enhancement of computed tomographic scanner based digital radiographic images

The British Journal of Radiology, 1983
Scanned digital radiographs are one of the imaging facilities available on the EMI 7070 scanner. The images offered by the system were found to be clinically poor and the reason for this was that the round shape of the patient was forming the major component of the image.
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Generalized fuzzy enhancement of image for radiographic testing weld

ISPA 2005. Proceedings of the 4th International Symposium on Image and Signal Processing and Analysis, 2005., 2005
Since radiographic testing weld image possesses several shortcomings, such as bad contrast ratio, narrow range of grayscale and fuzzy image, common enhancement method cannot improve contrast ratio and at the same time preserve edges well. Fuzzy enhancement does not modify pixel graylevel in the fuzzy feature space just like histogram and can obtain ...
null Zhang Xiao-guang, null Gao Ding, null Xu Jian-jian   +2 more
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Scalable edge enhancement with automatic optimization for digital radiographic images

Pattern Recognition, 2004
Abstract The ability to resolve fine picture detail is of paramount importance in medical imaging systems for viewing small tissue, bone structure and anatomy in X-ray images. In this paper, we present a new digital radiographic image processing system with the property of scalability and adaptability.
Lijun Yin, Anup Basu, Ja Kwei Chang
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Enhancement of Radiograph Images Based on Chaos Optimization

2009 International Workshop on Intelligent Systems and Applications, 2009
How to select the parameters of high-frequency emphasis filtering (HFEF) in order to enhance radiograph images, this paper presents an enhancing method based on chaos optimization algorithms (COA). Based on the properties of ergodicity, stochastic property and regularity of chaos, the chaos optimization method can get global solution with low ...
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Enhancing Radiographic Images Using Two Dimensional Left Median Filter

2011 Third National Conference on Computer Vision, Pattern Recognition, Image Processing and Graphics, 2011
The radiographic image has low contrast and high noise. In order to improve the image for observation and accurate analysis, various digital image processing techniques can be applied. In this research we propose Two Dimensional Left Median Filter method for de-noising radiographic images of welding. We have used the measures Peak Signal-to-Noise Ratio
Alireza Azari Moghaddam, Lalitha Rangarajan   +1 more
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Comparison of computer-generated, enhanced and conventional 2-dimensional radiographic imaging

American Journal of Orthodontics and Dentofacial Orthopedics, 2009
Technological advances have attempted to improve the standard of traditional x-ray imaging. ImageIQ software (LumenIQ, Bellingham, Wash) enhances conventional radiography by producing a computer-generated, enhanced 2-dimensional (2D) image, adding depth and detail.
Michael A, Hazey, Peter, Ngan, Harold, Reed, Thomas, Razmus, Richard, Crout, Elizabeth, Kao   +5 more
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Digital Image Enhancement Techniques for Dental Radiographs

2019
Dental radiographs suffer frequently from issues such as low contrast and non-uniform illumination. The first step, indeed a significant step, is to enhance these digital images to prepare them for successful post-processing. This pre-processing stage assists to increase the contrast between the foreground that is the teeth and bone from the background
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Enhancing Radiographic Dental Image Visualisation with Colourisation and Graphical User

Journal of Image Processing & Pattern Recognition Progress, 2020
Radiography has been used in dentistry to find cavities, bone loss, hidden dental structures, tumour, and cysts. Due to the monochromatic characteristic of X-ray images, it is difficult to discern disorders and explain the diagnosis procedure. Enhance the visualization of X-rays is one of the ways to ease the work of the dentist.
Karan Patel, Bhavesh Parmar
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