Comparison between mathematical morphology and Canny Edge Detection methods for image post processing techniques in segmenting microcalcification

2018 ◽  
Author(s):  
Aminah Abdul Malek ◽  
Ummu Mardhiah Abdul Jalil ◽  
Dayangku Nur Faizah Pg Mohamad ◽  
Nurul Ain Muhamad ◽  
Sharifah Syafiyah Syed Hashim
Keyword(s):  
Edge Detection ◽  
Mathematical Morphology ◽  
Detection Methods ◽  
Post Processing ◽  
Canny Edge Detection ◽  
Canny Edge ◽  
Processing Techniques

Measuring the Dimensions of Mechanical Component using Image Processing Techniques

2017 ◽  
Vol 7 (9) ◽  
pp. 65
Author(s):  
Dipti Nilesh Aswar
Keyword(s):  
Edge Detection ◽  
Hough Transform ◽  
Detection Technique ◽  
Circle Detection ◽  
Canny Edge Detection ◽  
Depth Measurement ◽  
Mechanical Component ◽  
Canny Edge ◽  
Processing Techniques ◽  
Real Time Application

This paper introduces automated process for measuring the dimensions of mechanical component. The proposed method includes image pre-processing techniques, edge detection technique, hough transform technique for circle detection and stereo vision concept is used for hole depth measurement of mechanical component. In practical, there are many factors which affects the measurement result. Noise may play key role. In order to eliminate noise effect on measurement Gaussian filtering algorithm is used. Then canny edge detection technique is used for edge detection, which helps to improve the accuracy of the result. For hole diameter measurement first we have to find out the circular shape and for circle identification we are using Hough transform technique. We are going to calculate the depth of hole by using the elevation by parallax technique. This proposed method is used for specific type of component. But in future this method can be applied for many type of real time application.

scholarly journals Processing of Drone’s Digital Image for Determining Border of Rice Fields with Edge Detection Method

2019 ◽  
Vol 2 (2) ◽  
pp. 139-144
Author(s):  
Suhardiman Diman ◽  
Zahir Zainuddin ◽  
Salama Manjang
Keyword(s):  
Edge Detection ◽  
Rice Field ◽  
Detection Method ◽  
Computing Time ◽  
Threshold Value ◽  
Error Rates ◽  
Detection Methods ◽  
Canny Edge Detection ◽  
Canny Edge ◽  
Edge Detection Method

Edge detection was the basic thing used in most image processing applications to get information from the image frame as a beginning for extracting the features of the segmentation object that will be detected. Nowadays, many edge detection methods create doubts in choosing the right edge detection method and according to image conditions. Based on the problems, a study was conducted to compare the performance of edge detection using methods of canny, Sobel and laplacian by using object of rice field. The program was created by using the Python programming language on OpenCV.  The result of the study on one image test that the Canny method produces thin and smooth edges and did not omit the important information on the image while it has required a lot of computing time. Classification is generally started from the data acquisition process; pre-processing and post-processing. Canny edge detection can detect actual edges with minimum error rates and produce optimal image edges. The threshold value obtained from the Canny method was the best and optimal threshold value for each method. The result of a test by comparing the three methods showed that the Canny edge detection method gives better results in determining the rice field boundary, which was 90% compared to Sobel 87% and laplacian 89%.

scholarly journals IMPLEMENTASI METODE DETEKSI TEPI CANNY PADA OBJEK SEBAGAI MODEL KEAMANAN APLIKASI PADA SMARTPHONE ANDROID

Petir ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 16-20
Author(s):  
Redaksi Tim Jurnal
Keyword(s):  
Edge Detection ◽  
Error Rate ◽  
Detection Methods ◽  
Canny Edge Detection ◽  
Minimum Error ◽  
Detection Of Objects ◽  
The Face ◽  
Canny Edge ◽  
Data Objects ◽  
Shape And Size

The development of technology push security system applications on android smartphone to develop one of its features that is detection of the object. The detection of Objects is a technology that allows us to identify or verify an object through a digital image by matching the texture of the object with the curve of the data objects stored in the database. For example, to match the curve of the face such as the nose, eyes and chin. There are several methods to support the work of object detection among which edge detection. Edge detection can represent the objects contained in the image of the shape and size as well as information about the texture of an object. the best method of edge detection is canny edge detection which has the minimum error rate compared with other edge detection methods. Canny edge detection will generate the image that has been processed into a new image. The new image will be stored on a database that will be matched to the image of a new object that is used as the opening applications on android smartphone.

scholarly journals Implementing canny edge detection algorithm for noisy image

2020 ◽  
Vol 9 (4) ◽  
pp. 1404-1410
Author(s):  
Ehsan Akbari Sekehravani ◽  
Eduard Babulak ◽  
Mehdi Masoodi
Keyword(s):  
Edge Detection ◽  
Median Filter ◽  
Detection Algorithm ◽  
Detection Methods ◽  
Canny Edge Detection ◽  
Edge Detection Algorithm ◽  
Canny Edge ◽  
Significant Stage ◽  
Salt And Pepper ◽  
Canny Edge Detection Algorithm

Edge detection is a significant stage in different image processing operations like pattern recognition, feature extraction, and computer vision. Although the Canny edge detection algorithm exhibits high precision is computationally more complex contrasted to other edge detection methods. Due to the traditional Canny algorithm uses the Gaussian filter, which gives the edge detail represents blurry also its effect in filtering salt-and-pepper noise is not good. In order to resolve this problem, we utilized the median filter to maintain the details of the image and eliminate the noise. This paper presents implementing and enhance the accuracy of Canny edge detection for noisy images. Results present that this proposed method can definitely overcome noise disorders, preserve the edge useful data, and likewise enhance the edge detection precision.

scholarly journals Extraction of Yardang Characteristics Using Object-Based Image Analysis and Canny Edge Detection Methods

2020 ◽  
Vol 12 (4) ◽  
pp. 726 ◽  
Author(s):  
Weitao Yuan ◽  
Wangle Zhang ◽  
Zhongping Lai ◽  
Jingxiong Zhang
Keyword(s):  
Image Analysis ◽  
Edge Detection ◽  
Spatial Resolution ◽  
Google Earth ◽  
Kappa Coefficient ◽  
Detection Methods ◽  
Canny Edge Detection ◽  
Object Based Image Analysis ◽  
Object Based ◽  
Canny Edge

Parameters of geomorphological characteristics are critical for research on yardangs. However, methods which are low-cost, accurate, and automatic or semi-automatic for extracting these parameters are limited. We present here semi-automatic techniques for this purpose. They are object-based image analysis (OBIA) and Canny edge detection (CED), using free, very high spatial resolution images from Google Earth. We chose yardang fields in Dunhuang of west China to test the methods. Our results showed that the extractions registered an overall accuracy of 92.26% with a Kappa coefficient of agreement of 0.82 at a segmentation scale of 52 using the OBIA method, and the exaction of yardangs had the highest accuracy at medium segmentation scales (138, 145). Using CED, we resampled the experimental image subset to a series of lower spatial resolutions for eliminating noise. The total length of yardang boundaries showed a logarithmically decreasing (R2 = 0.904) trend with decreasing spatial resolution, and there was also a linear relationship between yardang median widths and spatial resolutions (R2 = 0.95). Despite the difficulty of identifying shadows, the CED method achieved an overall accuracy of 89.23% with a kappa coefficient of agreement of 0.72, similar to that of the OBIA method at medium segmentation scale (138).

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