Recently, I used opencv as a project, and I was also studying the source code of opencv. I found that the performance of its median filter could not meet the requirements of the project, so I tried to optimize it. This article first analyzes the median filter source code of opencv, and then optimizes it […]
Tag: median
Adaptive median filter (FPGA implementation)
1. Algorithm principle flow chart The hardware block diagram of the adaptive median filter is as follows. 2. 5×5 window generation There are many references for median filtering in 3×3 windows, so I won’t introduce them here. The image data is input one by one. To realize the 5×5 template, it is first necessary to […]
Find the median of two ordinal arrays
Find the median of two positive sequence arrays First, let’s understand the definition of median. The median is the number in the middle of the sorted array, or the average of the two middle numbers if the length of the array is even. For two ordinal arrays, we need to find their median. First, let’s […]
Jincang database KingbaseES uses the percentage function to obtain the median
Migrated from the Oracle database to the KingbaseES database, the application uses the MEDIAN function to find the median. There is no MEDIAN function in the KingbaseES database, but the corresponding function can be realized through the percentage function. MEDIAN functionMEDIAN is an inverse distribution function that assumes a continuous distribution model. It takes a […]
KingbaseES uses the percentage function to get the median
The customer migrated from the Oracle database to the KingbaseES database, and used the MEDIAN function to find the median in the application. There is no MEDIAN function in the KingbaseES database, but the corresponding function can be realized through the percentage function. MEDIAN function MEDIAN is an inverse distribution function that assumes a continuous […]
The total distance between a column of numbers and the median is the smallest
The total distance between a column of numbers and the median is the smallest 3554. Binary (addition and subtraction of binary numbers – convert to decimal operation and then convert the result back to binary 3565. Perfect Matrix 1824. Diamond collector (classic double pointer) 3554. Binary (addition and subtraction of binary numbers – convert to […]
Development Log2023.05 ZENO—-Image Processing—-Blur, GaussianBlur, MedianBlur, BilateralBlur
Blur Gaussian Blur // Gaussian function double gaussian(double x, double sigma) { return exp(-(x * x) / (2 * sigma * sigma)); } // Gaussian filter function void gaussian_filter(std::shared_ptr<PrimitiveObject> & amp;image, std::shared_ptr<PrimitiveObject> & amp;imagetmp, int width, int height, int sigma) { // Calculate Gaussian kernel size int size = (int)(2 * sigma + 1); if […]
CSI fingerprint preprocessing (median, mean, Hampel, Wiener filter, state statistics filter)
Directory foreword 1. Box-line method 2. Median filter 3. Mean filter 4. Hampel filter 5. Wiener filter 6. State statistics filter Foreword Due to the influence of factors such as equipment, temperature, and laboratory items, unprocessed CSI data cannot be used directly, and the data needs to be processed for outliers to ensure the stability […]
Sorting, RMQ: dynamic median, super quick sort, genius memory
106. Dynamic Median Read in a sequence of integers in turn, and output the median of the sequence of integers that have been read in whenever the number of integers that have been read is odd. input format Input an integer P in the first line, which represents the number of subsequent data sets, and […]
B. Orac and Medians (Codeforces Round 641 (Div. 1))
Orac and Medians https://codeforces.com/contest/1349/problem/B Title translation ask a 1 , a 2 , ? a no a_1,a_2,\cdots a_n a1?,a2?,?an? Can the entire sequence be changed to k k k. (median refers to the ? ∣ the s ∣ + 1 2 ? \lfloor \frac {∣s∣ + 1} 2 \rfloor ?2∣s∣ + 1 small number) Ask […]