Center weighted median filters: Some properties and their applications in image processing

1994 ◽  
Vol 35 (3) ◽  
pp. 213-229 ◽  
Author(s):  
Tong Sun ◽  
Moncef Gabbouj ◽  
Yrjö Neuvo
Keyword(s):  
Image Processing ◽  
Median Filters ◽  
Weighted Median ◽  
Weighted Median Filters

Pattern-making simulation on embroidery using probabilistic neural network and texture fitting method

2011 ◽  
Vol 81 (20) ◽  
pp. 2082-2094 ◽  
Author(s):  
Chung-Feng Jeffrey Kuo ◽  
Chung-Yang Shih ◽  
Chien-Tung Max Hsu
Keyword(s):  
Neural Network ◽  
Image Processing ◽  
Probabilistic Neural Network ◽  
Processing Method ◽  
One Dimensional ◽  
Median Filters ◽  
Fitting Method ◽  
Weighted Median ◽  
Weighted Median Filters ◽  
Image Pixels

Embroidery fabric is different from other planar fabrics such as printed fabrics and twill fabrics. Because embroidery fabrics have inherent solid texture patterns, furry edges, voids and thickness shadows, it is very difficult to filter and simulate texture patterns and this is the bottleneck for embroidery automation. Therefore, this paper proposes the texture fitting method. The texture fitting method is a kind of nonfiltered digital image processing method. For embroidery fabrics full of multiple single-connected, single-color and single-texture closed regions, the texture fitting method can complete color and region separation, and texture simulation fast. Then the results can be output to monitors or plotters to investigate the simulation effect and it can be compared to real fabrics, or this technology can be used as a generalized filter for embroidery fabrics. This paper first addresses a combination of mean, morphological and central weighted median filters to remove light variation on embroidery surface, periodic darkness on the greige, and noised texture structures, so as to separate colors by weighted fuzzy C-means method and reshape one-dimensional image pixels to finish region separation. The second part of this paper utilizes the texture fitting method to identify stitch colors and simulate texture patterns over the whole image. By exporting the result to visual devices, we can prove the integral correctness and efficiency of the texture simulation.

Automatic and quantitative measurement of laryngeal video stroboscopic images

2016 ◽  
Vol 231 (1) ◽  
pp. 48-57
Author(s):  
Chung-Feng Jeffrey Kuo ◽  
Joseph Kuo ◽  
Shang-Wun Hsiao ◽  
Chi-Lung Lee ◽  
Jih-Chin Lee ◽  
...  
Keyword(s):  
Image Processing ◽  
Vocal Fold ◽  
Quantitative Measurement ◽  
Automatic Segmentation ◽  
Histogram Equalization ◽  
Image Noise ◽  
Median Filters ◽  
Weighted Median ◽  
Weighted Median Filters ◽  
Reference Parameters

The laryngeal video stroboscope is an important instrument for physicians to analyze abnormalities and diseases in the glottal area. Stroboscope has been widely used around the world. However, without quantized indices, physicians can only make subjective judgment on glottal images. We designed a new laser projection marking module and applied it onto the laryngeal video stroboscope to provide scale conversion reference parameters for glottal imaging and to convert the physiological parameters of glottis. Image processing technology was used to segment the important image regions of interest. Information of the glottis was quantified, and the vocal fold image segmentation system was completed to assist clinical diagnosis and increase accuracy. Regarding image processing, histogram equalization was used to enhance glottis image contrast. The center weighted median filters image noise while retaining the texture of the glottal image. Statistical threshold determination was used for automatic segmentation of a glottal image. As the glottis image contains saliva and light spots, which are classified as the noise of the image, noise was eliminated by erosion, expansion, disconnection, and closure techniques to highlight the vocal area. We also used image processing to automatically identify an image of vocal fold region in order to quantify information from the glottal image, such as glottal area, vocal fold perimeter, vocal fold length, glottal width, and vocal fold angle. The quantized glottis image database was created to assist physicians in diagnosing glottis diseases more objectively.

Weighted median filters: An analog implementation

Integration ◽  
2016 ◽  
Vol 55 ◽  
pp. 227-231 ◽  
Author(s):  
H.C. Bandala-Hernandez ◽  
J.M. Rocha-Pérez ◽  
A. Díaz-Sánchez ◽  
J. Lemus-López ◽  
H Vázquez-Leal ◽  
...  
Keyword(s):  
Median Filters ◽  
Weighted Median ◽  
Analog Implementation ◽  
Weighted Median Filters
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