When taking a photo from your phone you don't want to share your position, right? After rendering a picture from a tool like Gimp or Photoshop you want it to be as light as possible but to keep a good quality, right? So why not removing EXIF metadata?
With metadata a picture can looks like this:
ExifTool Version Number : 11.11
File Name : IMG_20181203_213126.jpg_original
Directory : .
File Size : 5.5 MB
File Modification Date/Time : 2018:12:03 22:27:42+01:00
File Access Date/Time : 2018:12:03 22:48:42+01:00
File Inode Change Date/Time : 2018:12:03 22:29:07+01:00
File Permissions : rw-r--r--
File Type : JPEG
File Type Extension : jpg
MIME Type : image/jpeg
Exif Byte Order : Little-endian (Intel, II)
Image Description :
Make : ulefone
Camera Model Name : Power_3
Orientation : Unknown (0)
X Resolution : 72
Y Resolution : 72
Resolution Unit : inches
Software : MediaTek Camera Application
Modify Date : 2018:12:03 21:31:26
Y Cb Cr Positioning : Co-sited
Exposure Time : 1/14
F Number : 2.0
Exposure Program : Not Defined
ISO : 1158
Exif Version : 0220
Date/Time Original : 2018:12:03 21:31:26
Create Date : 2018:12:03 21:31:26
Components Configuration : Y, Cb, Cr, -
Exposure Compensation : 0
Metering Mode : Center-weighted average
Light Source : Other
Flash : No Flash
Focal Length : 3.5 mm
Sub Sec Time : 98
Sub Sec Time Original : 98
Sub Sec Time Digitized : 98
Flashpix Version : 0100
Color Space : sRGB
Exif Image Width : 3984
Exif Image Height : 5312
Interoperability Index : R98 - DCF basic file (sRGB)
Interoperability Version : 0100
Exposure Mode : Auto
White Balance : Auto
Digital Zoom Ratio : 1
Scene Capture Type : Standard
Compression : JPEG (old-style)
Thumbnail Offset : 1280
Thumbnail Length : 36864
Image Width : 3984
Image Height : 5312
Encoding Process : Baseline DCT, Huffman coding
Bits Per Sample : 8
Color Components : 3
Y Cb Cr Sub Sampling : YCbCr4:2:2 (2 1)
Aperture : 2.0
Image Size : 3984x5312
Megapixels : 21.2
Shutter Speed : 1/14
Create Date : 2018:12:03 21:31:26.98
Date/Time Original : 2018:12:03 21:31:26.98
Modify Date : 2018:12:03 21:31:26.98
Thumbnail Image : (Binary data 36864 bytes, use -b option to extract)
Focal Length : 3.5 mm
Light Value : 2.3To remove all EXIF metadata with exiftool we have just to use this simple command:
exiftool -all= pic.jpgWe can also do the same for several pictures, for example in the current folder:
for i in *.jpg; do echo "Cleaning $i"; exiftool -all= "$i"; doneNow here is the same picture with EXIF metadata cleaned:
ExifTool Version Number : 11.11
File Name : IMG_20181203_213126.jpg
Directory : .
File Size : 5.5 MB
File Modification Date/Time : 2018:12:03 22:29:07+01:00
File Access Date/Time : 2018:12:03 22:29:43+01:00
File Inode Change Date/Time : 2018:12:03 22:29:07+01:00
File Permissions : rw-r--r--
File Type : JPEG
File Type Extension : jpg
MIME Type : image/jpeg
Image Width : 3984
Image Height : 5312
Encoding Process : Baseline DCT, Huffman coding
Bits Per Sample : 8
Color Components : 3
Y Cb Cr Sub Sampling : YCbCr4:2:2 (2 1)
Image Size : 3984x5312
Megapixels : 21.2