Aldo Ridhoni's Weblog Belajar Menulis

Removing Metadata

By Aldo Ridhoni
In How-to

Image is a great way to communicate ideas. With the advancing of smartphone and digital cameras, more picture is taken and uploaded to the web. With it come the data embedded in the image we upload. For example data about :
- Time and place of picture taken
- Camera info and settings
- Location
- Thumbnail
- Processing Application

photo with metadata

It's better to remove the metadata. Using program called jhead.

```terminal $ jhead -exifmap IMG_20151227_144151.jpg | sort | head n20

Aperture : f/2.7 Camera make : LGE Camera model : Nexus 4 Date/Time : 2015:12:27 14:41:52 Exposure time: 0.050 s (1/20) File date : 2015:12:27 14:41:52 File name : IMG_20151227_144151.jpg File size : 1482440 bytes Flash used : No Focal length : 4.6mm GPS Latitude : ? ? GPS Longitude: ? ? ISO equiv. : 1100 JPEG Quality : 85 Map: 00000 4d 4d 00 2a 00 00 00 08 00 0c ... ```

terminal $ jhead -purejpg IMG_20151227_144151.jpg Modified: IMG_20151227_144151.jpg

terminal $ jhead -exifmap IMG_20151227_144151.jpg File date : 2015:12:27 14:41:52 File name : IMG_20151227_144151.jpg File size : 1474874 bytes JPEG Quality : 85 Resolution : 3264 x 2448

The final image has removed information about the camera info and settings.