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https://github.com/imageprocessor/cv4j

The target is to set up a high quality and real-time image process and machine learning library which is implemented in pure java. The framework can run application on java desktop and android platform.
https://github.com/imageprocessor/cv4j

android cv java kotlin rxjava2

Last synced: about 1 month ago
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Host: GitHub
URL: https://github.com/imageprocessor/cv4j
Owner: imageprocessor
License: apache-2.0
Created: 2016-12-18T08:22:29.000Z (about 8 years ago)
Default Branch: master
Last Pushed: 2022-03-07T14:07:50.000Z (almost 3 years ago)
Last Synced: 2024-08-03T17:21:37.221Z (5 months ago)
Topics: android, cv, java, kotlin, rxjava2
Language: Java
Homepage:
Size: 11.2 MB
Stars: 843
Watchers: 57
Forks: 151
Open Issues: 15
Metadata Files:
- Readme: README-ENG.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE

Awesome Lists containing this project

README

        # cv4j

[![License](https://img.shields.io/badge/license-Apache%202-lightgrey.svg)](https://www.apache.org/licenses/LICENSE-2.0.html)

[![Build Status](https://travis-ci.org/imageprocessor/cv4j.svg?branch=master)](https://travis-ci.org/imageprocessor/cv4j)

[![](https://jitpack.io/v/imageprocessor/cv4j.svg)](https://jitpack.io/#imageprocessor/cv4j)

The target is to set up a high quality and real-time image process and machine learning library which is implemented in pure java. The framework can run application on java desktop and android platform.

![](logo.png)

#  The latest version

Module|cv4j|rxcv4j

---|:-------------:|:-------------:

The latest version|[![](https://jitpack.io/v/imageprocessor/cv4j.svg)](https://jitpack.io/#imageprocessor/cv4j)|[![](https://jitpack.io/v/imageprocessor/cv4j.svg)](https://jitpack.io/#imageprocessor/cv4j)

# Download and use

## 1.Download cv4j separately

```groovy

implementation 'com.github.imageprocessor.cv4j:cv4j:0.1.2'

```

## 2.Download rxcv4j

rxcv4j is packaged with RxJava2.x, if you download this module, you don’t need to download cv4j.

```groovy

implementation 'com.github.imageprocessor.cv4j:rxcv4j:0.1.2'

```

Functions currently implemented:

![](cv4j.png)

#  Common filters

| Filter name        | effect          | Remarks          |

| ------------- |:-------------:| :-------------:|

|BoxBlurFilter|盒子模糊，支持水平与垂直经向模糊，模糊半径通常为奇数1、3、5、7、9、11、15|Fast fuzzy algorithm|

|CarveFilter|浮雕效果, 支持两种浮雕类型，根据boolean参数决定使用哪一种|Pixel difference calculation

|ColorFilter|颜色匹配，支持12种颜色风格转换(相当于12个滤镜)， 基于查找表实现，速度极快|LUT加速计算|

|ConBriFilter|调整图像对比度与亮度，默认是提升对比，降低亮度，默认值分别为1.2， 0.7|对比度与亮度调整|

|EmbossFilter|轧花效果，基于跟浮雕效果类似，但是更加灵活，可以执行更多像素值校正|轧花效果|

|ExposureFilter|曝光效果，基于图像像素值取反，有一种类似光学相机曝光照片的效果|光爆效果

|FastEPFilter|边缘保留滤波-基于积分图的边缘保留滤波，是一种很好的噪声抑制算法，常用来实现人脸美化的关键步骤|边缘保留|

|FloSteDitheringFilter|抖动效果-基于错误扩展的抖动算法，实现像素点离散填充与二值化显示|抖动效果|

|GammaFilter|伽马校正，基于光学相机拍照之后，经常需要做此操作|伽马校正|

|GaussianBlurFilter|高斯模糊，基于高斯公式的图像模糊，比盒子模糊有更好的效果，但是速度较慢|高斯模糊|

|GaussianNoiseFilter|高斯噪声-产生高斯随机噪声，在图像中使用高斯随机噪声|高斯噪声|

|GlowFilter|光线效果，在图像中模仿自然光线照射|光线效果|

|GradientFilter|梯度效果，基于图像一阶导数算子实现的梯度效果，很好的显示了图像主要轮廓与边界|梯度效果|

|MeansBinaryFilter|黑白效果， 基于图像均值实现图像二值化效果|黑白效果|

|MosaicFilter|马赛克效果，基于积分图实现的图像马赛克效果，速度快效果好，支持矩形马赛克|马赛克效果|

|MotionFilter|移动效果，基于模糊与几何形变实现的图像模糊移动效果|移动效果|

|NatureFilter|自然系滤镜,根据参数选择，总计有八种自然风格的颜色滤镜(相当于8个滤镜)|自然系效果|

|OilPaintFilter|油画效果，基于轮廓与颜色分布实现的油画效果，逼真模拟秋日风情|油画效果|

|SepiaToneFilter|怀旧风格， 经典的图像怀旧风格滤镜，一秒生成|怀旧风格|

|SinCityFilter|邪恶之城，基于像素值局部变化的滤镜，可以根据输入参数调整阈值范围与对比颜色值|邪恶之城|

|SpotlightFilter|探照灯效果，基于中心像素距离而调整图像亮度的，产生亮度扩展效果|探照灯滤镜|

|StrokeAreaFilter|铅笔画效果， 模仿铅笔模糊实现， 可以将输入图像变了写生铅笔画，细节多少根据参数决定|铅笔画效果|

|VignetteFilter|边框效果，给图像加上立体边框，默认边框为黑色，可以通过输入参数调整边框大小与边框颜色|立体边框|

|WaterFilter|水波纹效果-模拟水波纹扩展效果，在输入图像中|

|WhiteImageFilter|增白亮度-通过参数可以调整图像亮度，有照片增白效果|增白效果|

# 空间卷积滤镜

| filter       | 名称        | 作用        |

|:-------------|:-------------| :-------------|

|ConvolutionHVFilter |卷积|模糊或者降噪|

|MinMaxFilter|最大最小值滤波|去噪声|

|SAPNoiseFilter |椒盐噪声|增加噪声|

|SharpFilter |锐化|增强|

|MedimaFilter |中值滤波|去噪声|

|LaplasFilter |拉普拉斯|提取边缘|

|FindEdgeFilter |寻找边缘|梯度提取|

|SobelFilter |梯度|获取x、y方向的梯度提取|

|VarianceFilter |方差滤波|高通滤波|

|MaerOperatorFilter |马尔操作|高通滤波|

|USMFilter |USM|增强|

# 联系方式

cv4j QQ交流群：492962708

cv4j slack协同管理：[Join the Slack team for cv4j](https://cv4j.slack.com/join/shared_invite/MTg5MDE1NDk2NDA1LTE0OTU4NzM2MjAtMjI3YTg0YzkyMA)

cv4j的系列文章：http://www.jianshu.com/nb/10401400

# ChangeLog

[版本更新记录](CHANGELOG.md)

# Contributing

[Pull requests](https://help.github.com/categories/collaborating-with-issues-and-pull-requests/) are welcome; see the [contributor guidelines](CONTRIBUTING.md) for details.