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smartcrop
=========
smartcrop finds good image crops for arbitrary sizes. It is a pure Go implementation, based on Jonas Wagner's [smartcrop.js](https://github.com/jwagner/smartcrop.js)
Image: [https://www.flickr.com/photos/usfwspacific/8182486789](https://www.flickr.com/photos/usfwspacific/8182486789) by Washington Dept of Fish and Wildlife, originally licensed under [CC-BY-2.0](https://creativecommons.org/licenses/by/2.0/) when the image was imported back in September 2014
Image: [https://www.flickr.com/photos/endogamia/5682480447](https://www.flickr.com/photos/endogamia/5682480447) by Leon F. Cabeiro (N. Feans), licensed under [CC-BY-2.0](https://creativecommons.org/licenses/by/2.0/)
## Installation
Make sure you have a working Go environment (Go 1.4 or higher is required).
See the [install instructions](http://golang.org/doc/install.html).
To install smartcrop, simply run:
go get github.com/muesli/smartcrop
To compile it from source:
cd $GOPATH/src/github.com/muesli/smartcrop
go get -u -v
go build && go test -v
## Example
```go
package main
import (
"fmt"
"image"
_ "image/png"
"os"
"github.com/muesli/smartcrop"
"github.com/muesli/smartcrop/nfnt"
)
func main() {
f, _ := os.Open("image.png")
img, _, _ := image.Decode(f)
analyzer := smartcrop.NewAnalyzer(nfnt.NewDefaultResizer())
topCrop, _ := analyzer.FindBestCrop(img, 250, 250)
// The crop will have the requested aspect ratio, but you need to copy/scale it yourself
fmt.Printf("Top crop: %+v\n", topCrop)
type SubImager interface {
SubImage(r image.Rectangle) image.Image
}
croppedimg := img.(SubImager).SubImage(topCrop)
// ...
}
```
Also see the test cases in smartcrop_test.go for further working examples.
## Sample Data
You can find a bunch of test images for the algorithm [here](https://github.com/muesli/smartcrop-samples).
## Development
Join us on IRC: irc.freenode.net/#smartcrop
[](https://godoc.org/github.com/muesli/smartcrop)
[](https://travis-ci.org/muesli/smartcrop)
[](https://coveralls.io/github/muesli/smartcrop?branch=master)
[](http://goreportcard.com/report/muesli/smartcrop)
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