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# Gradients calculations
Gradients calculations capabilities in GIL are demonstrated by the program `x_gradient`, compiled from the sources `example/x_gradient.cpp`.
## Synopsis
`x_gradient`
The program expects to find an image in the JPEG format in the current directory named `input.jpg`, and produces an image in JPEG format in the current directory in return, named `out-x_gradient.jpg`, where the gradients have been captured.
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
`x_gradient` expects to find an image in the JPEG format in the current directory.
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