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109上 影像處理

tags: 專業

0918

Interpolation

  1. Nearest-Neighbor:又稱為zero order interpolation,使用一個最近的相鄰像素。
  2. Bilinear:又稱為first order interpolation,使用四個最近的相鄰像素。
  3. Bicubic:又稱為second order interpolation,使用十六個最近的相鄰像素。

  1. Nearest Neighbor Interpolation 介紹: 顧名思義,此演算法是利用最近的相鄰點的值來填入。如下圖,新(右)圖的P'點因為最相鄰原(左)圖的P點,所以就將P點的值填入P'。

  2. 介紹: Bilinear Interpolation會利用最近相鄰的四個點依相鄰的(比例)程度來填入。如下圖,新(右)圖的P'點因為最相鄰原(左)圖的P(1,1),P(1,2),P(2,1),P(2,2)四點,所以就將此四點的值依比例填入P'。 公式:P'(x,y)=(1-d)(1-d')P(1,1)+d(1-d')P(1,2) +d'(1-d)P(2,1)+d*d'*P(2,2)

  3. Bicubic Interpolation 介紹: Bilinear Interpolation會利用最近相鄰的十六個點來填入。

ref

http://yzu1022cs362s1001549.blogspot.com/2014/03/opencv.html

openCV autocomplete on VScode

https://marketplace.visualstudio.com/items?itemName=did1335.opencv-intellisense

0922

Image Enhancement in the Spatial Domain

https://blog.xuite.net/viplab/blog/307263602-Image+Enhancement+in+the+Spatial+Domain

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