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环境依赖可以参考我的另一篇文章：windows ffmpeg安装部署_阿良的博客-CSDN博客
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 os import uuid from 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 result def _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 win32 runfile('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.jpg ffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9.3-win32 (GCC) 20200320 configuration: --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=-lgomp libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 / 58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 / 3. 7.100 libpostproc 55. 7.100 / 55. 7.100 Input #0, image2, from 'C:/Users/huyi/Desktop/4.jpg': Duration: 00:00:00.04, start: 0.000000, bitrate: 101138 kb/s Stream #0:0: Video: mjpeg (Progressive), yuvj444p(pc, bt470bg/unknown/unknown), 1920x1080, 25 tbr, 25 tbn, 25 tbc Stream 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 correctly Output #0, image2, to 'C:/Users/huyi/Desktop/c7052ed8-d5db-4e84-9c01-88d661c967a5.jpg': Metadata: encoder : Lavf58.45.100 Stream #0:0: Video: mjpeg, yuvj444p(pc), 1920x1080, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc Metadata: encoder : Lavc58.91.100 mjpeg Side data: cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A frame= 1 fps=0.0 q=9.2 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=0.232x video:133kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown C:/Users/huyi/Desktop/c7052ed8-d5db-4e84-9c01-88d661c967a5.jpg ffmpeg -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.jpg ffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9.3-win32 (GCC) 20200320 configuration: --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=-lgomp libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 / 58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 / 3. 7.100 libpostproc 55. 7.100 / 55. 7.100 Input #0, image2, from 'C:/Users/huyi/Desktop/4.jpg': Duration: 00:00:00.04, start: 0.000000, bitrate: 101138 kb/s Stream #0:0: Video: mjpeg (Progressive), yuvj444p(pc, bt470bg/unknown/unknown), 1920x1080, 25 tbr, 25 tbn, 25 tbc Stream 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 correctly Output #0, image2, to 'C:/Users/huyi/Desktop/9282f36a-2361-4b0d-a115-56864c9d2337.jpg': Metadata: encoder : Lavf58.45.100 Stream #0:0: Video: mjpeg, yuvj444p(pc), 1920x1080, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc Metadata: encoder : Lavc58.91.100 mjpeg Side data: cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A frame= 1 fps=0.0 q=9.5 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=0.129x video:177kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown C:/Users/huyi/Desktop/9282f36a-2361-4b0d-a115-56864c9d2337.jpg
黑白图效果
褐色图效果
OK，炫。
总结
没啥好总结的。
分享：
理想都是骗人的，都是鬼话。还不如及时行乐，还不如放纵一生，还不如今朝有酒今朝醉。但我还是要告诉你，理想是存在的，只不过追逐理想，可能会很痛苦。可我们依然要为理想主义，保留一席之地。——罗翔
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