Python 实现图片色彩转换案例

前言

本文提供将图片色彩转为黑白或者褐色风格。比较类似于我们在看动漫、影视作品中，当人物在回忆过程中，体现出来的画面一般都是黑白或者褐色的。

环境依赖

ffmpeg环境依赖，ffmpy依赖安装

pip install ffmpy -i https://pypi.douban.com/simple

代码

不废话，上代码

#!/user/bin/env python# coding=utf-8\"\"\"@project : csdn@author  : 剑客阿良_ALiang@file   : image_change_color_tool.py@ide    : PyCharm@time   : 2021-11-19 15:10:22\"\"\"import osimport uuidfrom ffmpy import FFmpeg# 黑白图def black_and_white(image_path: str, output_dir: str):ext = _check_format(image_path)result = os.path.join(output_dir, \'{}.{}\'.format(uuid.uuid4(), ext))ff = FFmpeg(inputs={image_path: None},outputs={result: \'-vf colorchannelmixer=.3:.4:.3:0:.3:.4:.3:0:.3:.4:.3 -y\'})print(ff.cmd)ff.run()return result# 褐色def brown(image_path: str, output_dir: str):ext = _check_format(image_path)result = os.path.join(output_dir, \'{}.{}\'.format(uuid.uuid4(), ext))ff = FFmpeg(inputs={image_path: None},outputs={result: \'-vf colorchannelmixer=.393:.769:.189:0:.349:.686:.168:0:.272:.534:.131 -y\'})print(ff.cmd)ff.run()return resultdef _check_format(image_path: str):ext = os.path.basename(image_path).strip().split(\'.\')[-1]if ext not in [\'png\', \'jpg\']:raise Exception(\'format error\')return ext

代码说明

1、两个方法入参均为：图片路径、输出目录路径。

2、为了避免文件名重复，使用uuid作为文件名。

3、图片的后缀格式判断只有两种，如需增加，自行添加即可。

验证一下

图片准备，原图如下：

验证代码

if __name__ == \'__main__\':print(black_and_white(\'C:/Users/huyi/Desktop/4.jpg\', \'C:/Users/huyi/Desktop/\'))print(brown(\'C:/Users/huyi/Desktop/4.jpg\', \'C:/Users/huyi/Desktop/\'))

执行结果

PyDev console: starting.Python 3.6.13 |Anaconda, Inc.| (default, Mar 16 2021, 11:37:27) [MSC v.1916 64 bit (AMD64)] on win32runfile(\'D:/spyder/csdn/image_change_color_tool.py\', wdir=\'D:/spyder/csdn\')ffmpeg -i C:/Users/huyi/Desktop/4.jpg -vf colorchannelmixer=.3:.4:.3:0:.3:.4:.3:0:.3:.4:.3 -y C:/Users/huyi/Desktop/c7052ed8-d5db-4e84-9c01-88d661c967a5.jpgffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developersbuilt with gcc 9.3-win32 (GCC) 20200320configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libtwolame --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomplibavutil      56. 51.100 / 56. 51.100libavcodec     58. 91.100 / 58. 91.100libavformat    58. 45.100 / 58. 45.100libavdevice    58. 10.100 / 58. 10.100libavfilter     7. 85.100 /  7. 85.100libswscale      5.  7.100 /  5.  7.100libswresample   3.  7.100 /  3.  7.100libpostproc    55.  7.100 / 55.  7.100Input #0, image2, from \'C:/Users/huyi/Desktop/4.jpg\':Duration: 00:00:00.04, start: 0.000000, bitrate: 101138 kb/sStream #0:0: Video: mjpeg (Progressive), yuvj444p(pc, bt470bg/unknown/unknown), 1920x1080, 25 tbr, 25 tbn, 25 tbcStream mapping:Stream #0:0 -> #0:0 (mjpeg (native) -> mjpeg (native))Press [q] to stop, [?] for help[swscaler @ 000001625402e2c0] deprecated pixel format used, make sure you did set range correctly[swscaler @ 0000016253b14f80] deprecated pixel format used, make sure you did set range correctlyOutput #0, image2, to \'C:/Users/huyi/Desktop/c7052ed8-d5db-4e84-9c01-88d661c967a5.jpg\':Metadata:encoder         : Lavf58.45.100Stream #0:0: Video: mjpeg, yuvj444p(pc), 1920x1080, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbcMetadata:encoder         : Lavc58.91.100 mjpegSide data:cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/Aframe=    1 fps=0.0 q=9.2 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=0.232xvideo:133kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknownC:/Users/huyi/Desktop/c7052ed8-d5db-4e84-9c01-88d661c967a5.jpgffmpeg -i C:/Users/huyi/Desktop/4.jpg -vf colorchannelmixer=.393:.769:.189:0:.349:.686:.168:0:.272:.534:.131 -y C:/Users/huyi/Desktop/9282f36a-2361-4b0d-a115-56864c9d2337.jpgffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developersbuilt with gcc 9.3-win32 (GCC) 20200320configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libtwolame --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomplibavutil      56. 51.100 / 56. 51.100libavcodec     58. 91.100 / 58. 91.100libavformat    58. 45.100 / 58. 45.100libavdevice    58. 10.100 / 58. 10.100libavfilter     7. 85.100 /  7. 85.100libswscale      5.  7.100 /  5.  7.100libswresample   3.  7.100 /  3.  7.100libpostproc    55.  7.100 / 55.  7.100Input #0, image2, from \'C:/Users/huyi/Desktop/4.jpg\':Duration: 00:00:00.04, start: 0.000000, bitrate: 101138 kb/sStream #0:0: Video: mjpeg (Progressive), yuvj444p(pc, bt470bg/unknown/unknown), 1920x1080, 25 tbr, 25 tbn, 25 tbcStream mapping:Stream #0:0 -> #0:0 (mjpeg (native) -> mjpeg (native))Press [q] to stop, [?] for help[swscaler @ 0000013b05762f80] deprecated pixel format used, make sure you did set range correctly[swscaler @ 0000013b052c4fc0] deprecated pixel format used, make sure you did set range correctlyOutput #0, image2, to \'C:/Users/huyi/Desktop/9282f36a-2361-4b0d-a115-56864c9d2337.jpg\':Metadata:encoder         : Lavf58.45.100Stream #0:0: Video: mjpeg, yuvj444p(pc), 1920x1080, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbcMetadata:encoder         : Lavc58.91.100 mjpegSide data:cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/Aframe=    1 fps=0.0 q=9.5 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=0.129xvideo:177kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknownC:/Users/huyi/Desktop/9282f36a-2361-4b0d-a115-56864c9d2337.jpg

黑白图效果