OpenCV+Python实现图像运动模糊和高斯模糊！它是编程界

作者: 14e61d025165 | 来源:发表于2019-05-14 15:43 被阅读0次

OpenCV+Python实现图像运动模糊和高斯模糊！它是编程界
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运动模糊：由于相机和物体之间的相对运动造成的模糊，又称为动态模糊

OpenCV+Python实现运动模糊，主要用到的函数是cv2.filter2D()：

<pre spellcheck="false" style="box-sizing: border-box; margin: 5px 0px; padding: 5px 10px; border: 0px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-weight: 400; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: inherit; vertical-align: baseline; cursor: text; counter-reset: list-1 0 list-2 0 list-3 0 list-4 0 list-5 0 list-6 0 list-7 0 list-8 0 list-9 0; background-color: rgb(240, 240, 240); border-radius: 3px; white-space: pre-wrap; color: rgb(34, 34, 34); letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;"># coding: utf-8
import numpy as np
import cv2
def motion_blur(image, degree=12, angle=45):
image = np.array(image)
# 这里生成任意角度的运动模糊kernel的矩阵， degree越大，模糊程度越高
M = cv2.getRotationMatrix2D((degree / 2, degree / 2), angle, 1)
motion_blur_kernel = np.diag(np.ones(degree))
motion_blur_kernel = cv2.warpAffine(motion_blur_kernel, M, (degree, degree))
motion_blur_kernel = motion_blur_kernel / degree
blurred = cv2.filter2D(image, -1, motion_blur_kernel)
# convert to uint8
cv2.normalize(blurred, blurred, 0, 255, cv2.NORM_MINMAX)
blurred = np.array(blurred, dtype=np.uint8)
return blurred
img = cv2.imread('linuxidc.com.jpg')
img_ = motion_blur(img)
cv2.imshow('Source image',img)
cv2.imshow('blur image',img_)
cv2.waitKey()
</pre>

原图与运动模糊效果如下：

<tt-image data-tteditor-tag="tteditorTag" contenteditable="false" class="syl1557819752449" data-render-status="finished" data-syl-blot="image" style="box-sizing: border-box; cursor: text; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; display: block;">

image

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高斯模糊：图像与二维高斯分布的概率密度函数做卷积，模糊图像细节

OpenCV+Python实现高斯模糊，主要用到的函数是cv2.GaussianBlur():

<pre spellcheck="false" style="box-sizing: border-box; margin: 5px 0px; padding: 5px 10px; border: 0px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-weight: 400; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: inherit; vertical-align: baseline; cursor: text; counter-reset: list-1 0 list-2 0 list-3 0 list-4 0 list-5 0 list-6 0 list-7 0 list-8 0 list-9 0; background-color: rgb(240, 240, 240); border-radius: 3px; white-space: pre-wrap; color: rgb(34, 34, 34); letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;"># coding: utf-8
import numpy as np
import cv2
img = cv2.imread('linuxidc.com.jpg')
img_ = cv2.GaussianBlur(img, ksize=(9, 9), sigmaX=0, sigmaY=0)
cv2.imshow('Source image',img)
cv2.imshow('blur image',img_)
cv2.waitKey()
</pre>

高斯模糊效果如下：

<tt-image data-tteditor-tag="tteditorTag" contenteditable="false" class="syl1557819752457" data-render-status="finished" data-syl-blot="image" style="box-sizing: border-box; cursor: text; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; display: block;">