如何检查 libjpeg-turbo 是否内置在 opencv 中?

问题描述

我从 github 下载了 opencv3.4.5 https://github.com/opencv/opencv/archive/3.4.5.zip.libjpeg-turbo 位于 3rdparty 目录.并添加 -D WITH_JPEG=ON 和 -D BUILD_JPEG=ON 构建它.我可以在 CMakeCache.txt 中检查这个.但是我在 install/include 或 install/lib 中找不到任何与 libjpeg-turbo 相关的东西.如何测试和验证 libjpeg-turbo 内置于 opencv 中?而不是系统 libjpeg.

I download the opencv3.4.5 from github https://github.com/opencv/opencv/archive/3.4.5.zip. And the libjpeg-turbo is located at 3rdparty dir.And build it with -D WITH_JPEG=ON and -D BUILD_JPEG=ON added. I can check this in CMakeCache.txt. But i cannot find any thing related with libjpeg-turbo at install/include or install/lib. How to test and verify the libjpeg-turbo is built into opencv? Instead of system libjpeg.

推荐答案

你的包中应该有一个名为 opencv_version 的二进制文件(可执行文件)，你可以这样运行:

There should be a binary (executable) in your package called opencv_version, which you can run like this:

opencv_version -v | grep -i jpeg

样本输出

JPEG:                        build-libjpeg-turbo (ver 1.5.3-62)
JPEG 2000:                   build (ver 1.900.1)

同样，在 Python 中，您可以:

---

Equally, within Python, you can do:

import cv2
print(cv2.getBuildInformation())

或者，也许更简洁:

import cv2
import re

re.findall('.*jpeg.*',cv2.getBuildInformation())

样本输出:

['    JPEG:                        build-libjpeg-turbo (ver 1.5.3-62)']

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