# sic image cli
[](https://github.com/foresterre/sic/actions?query=workflow%3Agithub_actions_ci)
[](https://crates.io/crates/sic)
[](https://docs.rs/sic)
[](https://crates.io/crates/sic)
_Convert images and perform image operations from the command-line._
`sic` (sic image cli) is a front-end for the [image crate](https://github.com/image-rs/image).
Aside from image operations supplied by the image crate, a few additional helpful operations such
as diff, are included. Operations provided by the [imageproc](https://github.com/image-rs/imageproc)
crate can be enabled by compiling with the `imageproc-ops` feature. We intend to provide more extensive support for imageproc
operations in a future release.
### Installation
Install with [cargo](https://crates.io/crates/sic): `cargo install sic`<br>
Update with [cargo](https://crates.io/crates/sic): `cargo install --force sic`
Pre build binary: see [releases](https://github.com/foresterre/sic/releases).
From the source:
- Setup rust and cargo (for example using [rustup](https://rustup.rs/)) <br>
- Clone this repo: `git clone https://github.com/foresterre/sic.git`
- Switch to this repo: `cd sic`
- Build a release: `cargo build --release`
🍺 Homebrew on MacOS:
```shell
brew tap tgotwig/sic
brew install tgotwig/sic/sic
```
🍺 Homebrew on Linux:
```shell
brew tap tgotwig/linux-sic
brew install tgotwig/linux-sic/sic
```
**MSRV when building from source:**
Expects development against the latest Rust stable version, but may work on older versions.
### Usage
##### Convert images
Convert an image from one format to another, for example from PNG to JPG.
* Command: `sic --input <input> --output <output>`
* Shorthand: `sic -i <input> -o <output>`
* Example: `sic -i input.png -o output.jpg` <br>
If you want to explicitly set the image output format, you may do so by providing the `--output-format <format>` argument.
Otherwise, sic will attempt to infer the format from the output file extension.
`--help` can be used to view a complete list of supported image output formats. Included are: `bmp`, `farbfeld`, `gif`, `ico`, `jpg` (`jpeg`), `png`, `pam`, `pbm`, `pgm` and `ppm`.
The JPEG quality can optionally be set with `--jpeg-encoding-quality <value>`. The value should be in the range 1-100 (with default 80).
The PNM format (specifically PBM, PGM and PPM) use binary encoding (PNM P4, P5 and P6 respectively) by default.
To use ascii encoding, provide the following flag: `--pnm-encoding-ascii`.
##### Convert or apply operations on a set of images
For the use case where you have a directory containing several (hundreds of) images which you like to convert to different
format, or on which you perhaps want to apply certain image operations, `sic` provides built-in glob pattern matching.
This mode can be used by providing the `--glob-input` and `--glob-output` options instead of `--input` and `--output` respectively.
Examples:
* To convert a directory of images from PNG to JPG, you can run sic with the following arguments: <br>
* `sic --glob-input "*.png" --glob-output output_dir --output-format jpg"`
* To convert all images with the `jpg`, `jpeg` and `png` extensions to BMP:
* `sic --glob-input "*.{jpg, jpeg, png}" --glob-output output_dir --output-format bmp`
* To emboss all images in a folder (assuming it contains only supported image files and no folders):
* `sic --glob-input "*" --glob-output embossed_output --filter3x3 -1 -1 0 -1 1 1 0 1 1`
A few things worth noticing: 1) We use quotation marks (`"`) around the input argument, so our shell won't expand the
glob pattern to a list of files. 2) When using glob mode, our output (`--glob-output`) should be a folder instead of a file. 3) We
need to explicitly state the output format with `--output-format`, unless we work with a known extension we want to keep.
Output images are placed in the output folder using the directory structure mirrored from the first common directory of
all input files. If output directories do not exist, they will be created.
<br>
##### Apply image operations
There are two methods to apply image operations. You can only use one at a time.
The first method is called the _script operations method_ (or: _script_), and the second method is
called the _cli operations method_ (or _cli ops_). <br><br>
The operations are applied in the same order as they are provided (left-to-right) and are generally not commutative.
###### 📜 script operations method
Use this method by using the `--apply-operations "<operations>"` (shorthand: `-x`) cli argument and providing
statements which tell `sic` what operations should be applied on the image, for example: <br>
`sic -i input.jpg -o output.jpg --apply-operations "flip-horizontal; blur 10; resize 250 250"` <br>
When more than one image operation is provided, the separator `;` should be used to separate each operation statement. <br><br>
###### ✏️ cli operations method
Use this method by providing cli image operation arguments, such as `--blur` and `--crop`, directly.
If we use the _cli operations_ method the previously shown example becomes: <br>
`sic -i input.png -o output.jpg --flip-horizontal --blur 10 --resize 250 250` <br>
<br><br>
##### Supported operations
For some operations, their behaviour can be adapted by setting an operation modifier. These modifiers can be overwritten and they can also be reset (to their default behaviour).
|set environment option | `set <option> [<args 0..n>]` | 0.9.0 | Enables the use of a modifier for an operation. Any operation which uses the value of the modifier will use the set modifier value instead of the default value. Can be overwritten by calling `set` again for the same operation and modifier specifier. |
|unset environment option | `del <option>` | 0.9.0 | Resets the modifier value. Any operation which looks at the value of this modifier will use the default value instead.|
_legend_:
`<byte>`: an 8 bit unsigned integer (positive number in range 0-255
`<uint>`: a 32 bit unsigned integer (positive number)
`<int>`: a 32 bit signed integer (positive or negative number)
`<fp>`: a 32 bit floating-point number (real number)
`<fp9x>`: 9 succeeding 32 bit floating-point numbers
`<path>`: a qualified path to an image reachable from your current platform (the path should be surrounded by quotation marks, i.e. " or ')
`<string>`: a valid unicode string
`<nv:coord>`: a named value representing a coordinate (top left is (0, 0)), with syntax `coord(<uint>, <uint>)`
`<nv:rgba>`: a named value representing an RGBA color, with syntax: `rgba(<byte>, <byte>, <byte>, <byte>)`
`<nv:size>`: a named value representing a font size, with syntax: `size(<fp>)`
`<nv:font>`: a named value representing a (TrueType) font file location, with syntax: `font(<path>)`
_Image operation example usage:_
**blur** example: <br>
`sic -i in.png -o out.png --apply-operations "blur 1.3;"` <br>
or <br>
`sic -i in.png -o out.png --blur 1.3`
**brighten** example: <br>
`sic -i in.png -o out.png --apply-operations "brighten 2;"` <br>
or <br>
`sic -i in.png -o out.png --brighten 2`
**contrast** example: <br>
`sic -i in.png -o out.png --apply-operations "contrast 0.7;"` <br>
or <br>
`sic -i in.png -o out.png --contrast 0.7`
**crop** example: <br>
`sic -i in.png -o out.png --apply-operations "crop 0 0 10 10;"` <br>
or <br>
`sic -i in.png -o out.png --crop 0 0 10 10`
**diff** example: <br>
`sic -i a.png -o diff_between_a_and_b.png --apply-operations "diff 'b.png'"` <br>
or <br>
`sic -i a.png -o diff_between_a_and_b.png --diff b.png`
|  |  |  |
**draw-text** example (requires build feature `imageproc-ops`): <br>
`sic -i in.png -o out.png --apply-operations "draw-text '<3' coord(10, 2) rgba(255, 0, 0, 255) size(14) font('./Lato-Regular.ttf')"` <br>
or <br>
`sic -i in.png -o out.png --draw-text "<3" "coord(10, 2)" "rgba(255, 0, 0, 255)" "size(14)" "font('Lato-Regular.ttf')"`
|  |  |
**filter3x3** example: <br>
`sic -i in.png -o out.png --apply-operations "filter3x3 -1 -1 0 -1 0 1 0 1 1"` <br>
or <br>
`sic -i in.png -o out.png --filter3x3 -1 -1 0 -1 0 1 0 1 1`
**flip horizontal** example: <br>
`sic -i in.png -o out.png --apply-operations "flip-horizontal"` <br>
or <br>
`sic -i in.png -o out.png --flip-horizontal`
**flip vertical** example: <br>
`sic -i in.png -o out.png --apply-operations "flip-vertical"` <br>
or <br>
`sic -i in.png -o out.png --flip-vertical`
**gray scale** example: <br>
`sic -i in.png -o out.png --apply-operations "grayscale"` <br>
or <br>
`sic -i in.png -o out.png --grayscale`
**hue rotate** example: <br>
`sic -i in.png -o out.png --apply-operations "hue-rotate -90"` <br>
or <br>
`sic -i in.png -o out.png --hue-rotate -90`
**invert** example: <br>
`sic -i in.png -o out.png --apply-operations "invert"` <br>
or <br>
`sic -i in.png -o out.png --invert`
**overlay** example: <br>
`sic -i in.png -o out.png --apply-operations "overlay 'image.png' 10 10"` <br>
or <br>
`sic -i in.png -o out.png --overlay "image.png" 10 10`
**resize** example: <br>
`sic -i in.png -o out.png --apply-operations "resize 100 100"` <br>
or <br>
`sic -i in.png -o out.png --resize 100 100`
**resize** with **preserve aspect ratio** example: <br>
`sic -i in.png -o out.png --apply-operations "set preserve-aspect-ratio true; resize 100 100"` <br>
or <br>
`sic -i in.png -o out.png --preserve-aspect-ratio true --resize 100 100`
**resize** with **custom sampling filter** (default is 'lanczos3') example: <br>
`sic -i in.png -o out.png --apply-operations "set sampling-filter triangle; resize 100 100"` <br>
or <br>
`sic -i in.png -o out.png --sampling-filter triangle --resize 100 100`
**rotate 90 degree** example: <br>
`sic -i in.png -o out.png --apply-operations "rotate90"` <br>
or <br>
`sic -i in.png -o out.png --rotate90`
**rotate 180 degree** example: <br>
`sic -i in.png -o out.png --apply-operations "rotate180"` <br>
or <br>
`sic -i in.png -o out.png --rotate180`
**rotate 270 degree** example: <br>
`sic -i in.png -o out.png --apply-operations "rotate270"` <br>
or <br>
`sic -i in.png -o out.png --rotate270`
**unsharpen** example: <br>
`sic -i in.png -o out.png --apply-operations "unsharpen -0.7 1"` <br>
or <br>
`sic -i in.png -o out.png --unsharpen -0.7 1`
example with *multiple* image operations which are applied from left-to-right: <br>
`sic -i in.png -o out.png --apply-operations "rotate180; flip-horizontal; set sampling-filter nearest; resize 75 80; hue-rotate 75"` <br>
or <br>
`sic -i in.png -o out.png --rotate180 --flip-horizontal --sampling-filter nearest --resize 75 80 --hue-rotate 75`
<br>
**Other resources on image operations**
For additional information on available options and flags, run `sic --help`.
### License
Licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
at your option.
#### Contribution
Unless you explicitly state otherwise, any contribution intentionally
submitted for inclusion in the work by you, as defined in the Apache-2.0
license, shall be dual licensed as above, without any additional terms or
conditions.
### Suggestions, Questions, Bugs
Feel free to open an issue :mailbox_with_mail: if you have a suggestion, a question or found a bug =).
:guitar: :trumpet: :violin: :saxophone: