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https://github.com/muesli/smartcrop

smartcrop finds good image crops for arbitrary crop sizes
https://github.com/muesli/smartcrop

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smartcrop finds good image crops for arbitrary crop sizes

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README 

          
smartcrop

=========



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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)



![Example](./examples/gopher.jpg)

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



![Example](./examples/goodtimes.jpg)

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 1.12 or higher is required).

See the [install instructions](https://golang.org/doc/install.html).



To install smartcrop, simply run:



    go get github.com/muesli/smartcrop



To compile it from source:



    git clone https://github.com/muesli/smartcrop.git

    cd smartcrop

    go build



## 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 and cli application in cmd/smartcrop/ for further working examples.



## Simple CLI application



    go install github.com/muesli/smartcrop/cmd/smartcrop



    Usage of smartcrop:

      -height int

            crop height

      -input string

            input filename

      -output string

            output filename

      -quality int

            jpeg quality (default 85)

      -resize

            resize after cropping (default true)

      -width int

            crop width



Example:

    smartcrop -input examples/gopher.jpg -output gopher_cropped.jpg -width 300 -height 150



## Sample Data



You can find a bunch of test images for the algorithm [here](https://github.com/muesli/smartcrop-samples).



## Feedback



Got some feedback or suggestions? Please open an issue or drop me a note!



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