Median filter

This study overcomes the above limitation. At the noise pixel detection step, the algorithm uses an adaptively sized window to help distinguish the noise candidate points as real noise pixels or texture pixels based on the observation that the noise pixels are usually isolated pixels, whose value changes suddenly compared to the surrounding values.

8p vigrab 02-02-2024 6 2   Download

The paper "Image processing-based automatic gradation of stone aggregates" aims to employ image processing methods to develop a simple tool for automatic gradation of stone aggregates. The methods of image thresholding, Gaussian filtering, median filtering, morphological closing, and contour analysis are employed. The output of the newly constructed system is the plots demonstrating particle size distribution. These plots can be used for further inspection of aggregate gradation. The system has been developed in Python and with the help of the OpenCV library.

6p nhanchienthien 25-07-2023 6 3   Download

This research work utilizes image processing techniques and sand patch tests to measure pavement macrotexture. Image processing techniques including median filter, Sobel edge detector, and circle fitting are used. The newly developed method is able to compute the pavement macrotexture depth index based on image of sand patch test. This image processing-based method is developed in Visual C#.NET framework 4.7.2. The newly developed program has been tested with real-world image samples.

5p nhanchienthien 25-07-2023 9 4   Download

Bài viết đề xuất xây dựng mô hình “Nhận dạng cua giống” trên nền thiết bị di động, trước mắt là các thiết bị chạy hệ điều hành Android. Mô hình nhận dạng được xây dựng dựa trên giải thuật Boosting phân tầng có sử dụng đăc trưng Haar-like. Thông qua ảnh chụp từ thiết bị di động (ví dụ, chụp ảnh chậu chứa cua giống), hệ thống sẽ lọc nhiễu theo phương pháp lọc trung vị (Median Filter) để nâng cao chất lượng ảnh, loại bỏ các chi tiết không cần thiết.

6p wangziyi_1307 26-04-2022 29 2   Download

Recently, the innovative vein finder system has been studied extensively and has many practical uses in healthcare and security. Developing a better vein finder system often relies on image processing procedures which help to enhance the vein images. Conventional image processing procedures as median filtering and adaptive histogram equalization have shown benefit in enhancing vein patterns. However, in some cases when there are hairs present in the images, most of these procedures are less effective in removing noises from hairs.

7p nguaconbaynhay12 13-06-2021 5 1   Download

This study aims at developing an image processing based method for automatic extraction of pothole object on surface of asphalt pavement road. Image processing methods including Median Filter, Otsu’s method for image thresholding, and image morphological analyses are employed for extracting pothole objects from digital images. Experimental results with image samples demonstrate the effectiveness of the developed image processing tool.

4p kethamoi10 21-01-2021 38 1   Download

This chapter presents the following content: Image differencing, averaging of the images, mask processing, linear smoothing operation, mask processing, linear smoothing operation, median filter, sharpening spatial filter.

31p nanhankhuoctai8 23-06-2020 17 2   Download

This chapter presents the following content: 1st and 2nd order derivatives, laplacian filter, unsharp masking and high-boost filtering, mask processing, linear smoothing operation, median filter, sharpening spatial filter.

33p nanhankhuoctai8 23-06-2020 12 1   Download

To study surface denoising of lithium battery film to extract feature effectively. The best atomic function by sparse decomposition is acquired by iteration under added noise, gaussian noise, salt and pepper noise, additive and multiplicative noise.

7p vivalletta2711 11-01-2020 6 0   Download

In this paper, my proposed method is to combine filter and threshold to calculate the denoising coefficients in curvelet domain. The result of proposed method is compared with other previous methods and shows an improvement.

8p vithomasedison2711 14-08-2019 20 0   Download

To improve the noise characteristics, software-based noise reduction algorithms are widely used in cadmium zinc telluride (CZT) pixelated semiconductor gamma camera system. The purpose of this study was to develop an improved median filtering algorithm using a thresholding method for noise reduction in a CZT pixelated semiconductor gamma camera system.

5p minhxaminhyeu3 12-06-2019 31 2   Download

This paper presents hardware implementation of a five image enhancement algorithms in spatial domain using FPGA technology. These algorithms are: median filter, contrast stretching, histogram equalization, negative image transformation and power-law transformation.

7p byphasse043256 24-03-2019 15 2   Download

Lecture Digital image processing - Spatial and frequency domain filter design include all of the following content: Spatial domain filter design (average/mean filter, median filter, gaussian smoothing, conservative smoothing), frequency – based filter design.

10p youcanletgo_04 17-01-2016 43 2   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Detail-Preserving Restoration of Impulse Noise Corrupted Images by a Switching Median Filter Guided by a Simple Neuro-Fuzzy Network

11p sting12 11-03-2012 51 4   Download

1. Bộ lọc mịn ảnh + Lựa chọn lớp ảnh cần làm mịn (có thể lựa chọn chi tiết một vùng trên lớp ảnh) + Chọn Filter-Noise (có các lựa chọn hiệu ứng) * Add Noise Tăng cường độ sạn của ảnh - Amount Độ dày của sạn ảnh - Uniform Theo khuân mẫu chuẩn (độ sạn đồng đều) - Gaussian Độ sạn không đồng đều về sắc độ và độ nét - Lựa chọn Monochromatic làm cho các hạt sạn trở thành đơn sắc Median Tăng cường độ mịn của ảnh bằng cách tăng giá trị Radius (bán kính...

8p kata_7 28-02-2012 107 35   Download

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Research Article A New Switching-Based Median Filtering Scheme and Algorithm for Removal of High-Density Salt and Pepper Noise in Images

11p dauphong15 16-02-2012 51 5   Download

IMPULSIVE NOISE 12.1 12.2 12.3 12.4 12.5 12.6 12.7 Impulsive Noise Statistical Models for Impulsive Noise Median Filters Impulsive Noise Removal Using Linear Prediction Models Robust Parameter Estimation Restoration of Archived Gramophone Records Summary I mpulsive noise consists of relatively short duration “on/off” noise pulses, caused by a variety of sources, such as switching noise, adverse channel environments in a communication system, dropouts or surface degradation of audio recordings, clicks from computer keyboards, etc.

23p khinhkha 30-07-2010 89 5   Download