spatial resolution (pixel per inch)

11 Mar 2020
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how can i calculat a spatial resolution .
i did imfinfo('Picture1.png') ;
and this is the result : FileSize: 206310
Format: 'png'
FormatVersion: []
Width: 402
Height: 261
BitDepth: 24
ColorType: 'truecolor'
FormatSignature: [137 80 78 71 13 10 26 10]
Colormap: []
Histogram: []
InterlaceType: 'adam7'
Transparency: 'alpha'
SimpleTransparencyData: []
BackgroundColor: []
RenderingIntent: 'perceptual'
Chromaticities: [0.3127 0.3290 0.6400 0.3300 0.3000 0.6000 0.1500 0.0600]
Gamma: 0.4545
XResolution: 3110
YResolution: 3503
ResolutionUnit: 'meter'
XOffset: []
YOffset: []
OffsetUnit: []
SignificantBits: []
ImageModTime: []
Title: []
Author: []
Description: []
Copyright: []
CreationTime: []
Software: []
Disclaimer: []
Warning: []
Source: []
Comment: []

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