Use at both!

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Image Metadata

Exif Image Width
800
Exif Image Height
600
X Resolution
72
Y Resolution
72
Resolution Unit
inches
Bits Per Sample
8
Color Space
sRGB
Color Components
3
Y Cb Cr Positioning
Centered
Y Cb Cr Sub Sampling
YCbCr4:2:0 (2 2)
File Type
JPEG
File Size
124 kB
Encoding Process
Baseline DCT, Huffman coding
Exif Byte Order
Big-endian (Motorola, MM)

Environment

Exif Version
0221
Flashpix Version
0100
JFIF Version
1.01