Body hair noise suppression in skin lesions by differential operator and maximum variance threshold between classes

Mapping Intimacies ◽

10.1109/ci-ibbi54220.2021.9626111 ◽

2021 ◽

Author(s):

Carlos Vicente Nino Rondon ◽

Diego Andres Castellano Carvajal ◽

Byron Medina Delgado ◽

Sergio Alexander Castro Casadiego ◽

Dinael Guevara Ibarra

Keyword(s):

Differential Operator ◽

Noise Suppression ◽

Skin Lesions ◽

Body Hair ◽

Maximum Variance

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SAR Image Segmentation Based on Maximum Variance Method and Morphology

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.798-799.761 ◽

2013 ◽

Vol 798-799 ◽

pp. 761-764

Author(s):

Ming Xia Xiao

Keyword(s):

Image Segmentation ◽

Noise Suppression ◽

Operation Time ◽

Differential Method ◽

Good Effect ◽

Sar Image ◽

Variance Method ◽

Maximum Variance ◽

Sar Image Segmentation ◽

A New Technique

A new technique that combines maximum variance method and morphology was presented for Synthetic Aperture Radar (SAR) image segmentation in target detection. Firstly, using the first-order differential method to enhance the original image for highlighting edge details of the image; then using the maximum variance method to calculate the gray threshold and segment the image; lastly, the mathematical morphology was used to processing the segmented image, which could prominently improve the segmentation effects. Experiments show that this algorithm can obtain accurate segmentation results, and have a good effect on noise suppression, edge detail protection and operation time.

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Fine Structural Alterations in Thyroid Follicular Cells (FC) and Changes in Serum Thyroxine Produced by Feeding Polychlorinated Biphenyl (PCB) to Rats

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100079929 ◽

1977 ◽

Vol 35 ◽

pp. 498-499

Author(s):

W.T. Collins ◽

Charles C. Capen ◽

Louis Kasza

Keyword(s):

Feed Efficiency ◽

Polychlorinated Biphenyl ◽

Serum Proteins ◽

Skin Lesions ◽

Hepatic Necrosis ◽

Ultrastructural Changes ◽

Lymphoid Tissues ◽

Heat Transfer Fluids ◽

Thyroid Follicular Cells ◽

Peripheral Metabolism

The widespread contamination of the environment with PCB, a compound used extensively by industry in hydraulic and heat transfer fluids as well as plasticizers and solvents in adhesives and sealants, has resulted in detectable tissue levels in a large portion of the human population, domestic animals, and wildlife. Intoxication with PCB produces severe hepatic necrosis, degeneration of lymphoid tissues and kidney, skin lesions, decreased reproductive performance, reduced feed efficiency, and decreased weight gain. PCB also has been reported to reduce the binding of thyroid hormone to serum proteins and enhance the peripheral metabolism of thyroxine with increased excretion of thyroxine-glucuronide in the bile (Bastomsky, Endocrinology 95: 1150-1155, 1974).The objectives of this investigation were (1) to investigate the histopathologic, histochemical, and ultrastructural changes in thyroid FC produced by the acute (4 week) and chronic (12 week) administration of low (50 ppm) and high (500 ppm) doses of PCB to rats, (2) to correlate these alterations to changes in serum immunoreactive thyroxine concentration, and (3) to investigate the persistence of the effects of PCB on the thyroid gland.

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