977ed18d
 Hu Chunming
提交三方库
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# Thresholding
Thresholding capabilities in GIL are demonstrated by the program `threshold`, compiled from the sources `example/threshold.cpp`.
## Synopsis
`threshold`
The program expects to find an image in the JPEG format in the current directory named `input.jpg`, and produces two images in JPEG format in the current directory in return, named `out-threshold-binary.jpg` and `out-threshold-binary-inv.jpg`, where a thresholding and an inverse thresholding, respectively, has been applied.
The program doesn't take any command line arguments.
## Specific requirements
### Build requirements
- A C++ compiler compliant with C++14 or above
- The JPEG library installed and configured.
### Execution requirements
`threshold` expects to find an image in the JPEG format in the current directory.
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