imageorient
Package imageorient provides image decoding functions similar to standard library's
image.Decode and image.DecodeConfig with the addition that they also handle the
EXIF orientation tag (if present).
License: MIT.
See also: http://www.daveperrett.com/articles/2012/07/28/exif-orientation-handling-is-a-ghetto/
Install / Update
go get -u github.com/disintegration/imageorient
Documentation
http://godoc.org/github.com/disintegration/imageorient
Usage example
package main
import (
"image/jpeg"
"log"
"os"
"github.com/disintegration/imageorient"
)
func main() {
// Open the test image. This particular image have the EXIF
// orientation tag set to 3 (rotated by 180 deg).
f, err := os.Open("testdata/orientation_3.jpg")
if err != nil {
log.Fatalf("os.Open failed: %v", err)
}
// Decode the test image using the imageorient.Decode function
// to handle the image orientation correctly.
img, _, err := imageorient.Decode(f)
if err != nil {
log.Fatalf("imageorient.Decode failed: %v", err)
}
// Save the decoded image to a new file. If we used image.Decode
// instead of imageorient.Decode on the previous step, the saved
// image would appear rotated.
f, err = os.Create("testdata/example_output.jpg")
if err != nil {
log.Fatalf("os.Create failed: %v", err)
}
err = jpeg.Encode(f, img, nil)
if err != nil {
log.Fatalf("jpeg.Encode failed: %v", err)
}
}