Take 1, 2, 3, 4, 5, 6, 7, 8, 9 as an example, * * * has 9 numbers, and the middle number is the average of the fifth and fifth numbers. The fifth and fifth digits are 5 and 5, and their average value is 5. Therefore, the median value of all values sorted in ascending order is 5.
Median value refers to the average of the two values in the middle if the number of values is odd or even when several values obtained from the experiment are arranged in increasing (or decreasing) order.
Photoshop median: The filter reduces the noise in the image by mixing the brightness of pixels in the selection. The filter searches the radius range of pixel selection to find pixels with similar brightness, removes pixels that are too different from neighboring pixels, and replaces the central pixel with the middle brightness value of the searched pixel. This filter is very useful for eliminating or reducing dynamic effects in images.
The function and significance of mathematics;
1. Solving practical problems: Mathematics is a tool that can help us solve many practical problems, such as calculating costs, solving geometric problems, making statistical analysis and forecasting.
2. Cultivate thinking ability: Mathematics is an effective way to cultivate thinking ability. By studying mathematics, we can exercise our logical reasoning ability, abstract thinking ability, imagination and creativity, and improve our ability to solve problems.
3. Promote the study of other disciplines: Mathematics is the foundation of many other disciplines, such as physics, chemistry and computer science. Mastering the basic knowledge of mathematics is helpful for us to better understand and apply the knowledge of these subjects.
4. Application in society: Mathematics has a wide range of applications in society, such as finance, economy, engineering, science and medicine. In these fields, mathematics is used to analyze and solve problems, which provides more convenience and guarantee for our lives.