Image Classification

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Center for Research and Application for Satellite Remote Sensing
Yamaguchi University
Image Classification

• The Semi-Automatic Classification Plugin (SCP) is a free open source
plugin for QGIS that allows for the semi-automatic ...

Video: https://www.youtube.com/user/fromgistors/videos
Learning source from SCP developer

http://www.gisagmaps.com/landsat-8-sentinel-2-bands/
Landsat-8 Sentinel-2
Layer 1
Layer 2
Layer 3
Layer 4
Layer 1
Layer 2
...

• “Plugins” → “manage and install plugin” → search for “semi-automatic
classification PI” -> install
Semi-automatic classi...

Semi-automatic classification plugin (SCP)

Pre-processing Training Input Classification
SCP: 3 Steps

• Go to icon of semi-automatic classification plugin → Preprocessing
• Or directly to preprocessing tool
Input
Run → selec...

• In band set will show image from preprocessing → click “RUN”
In band set will show image from preprocessing

RGB tool in semi-classification plugin

RGB tool in semi-classification plugin

Classes (MC ID)
• 1 Water
• 2 Tree and high vegetation
• 3 Low vegetation, grassland
• 4 Building, manmade
• 5 Openland, b...

Create training input .scp

Create training or ROI

Create training or ROI

Change color for MC ID (in Macroclass list)

Change color

Optional!!! if you want to check
and manage your training area.
Page 15 - 25

Merge highlighted
spectral signature
Merge signature

Delete highlighted
spectral signature
Delete signature

Merged spectral signature: 5 classes

Add highlighted
spectral signature to
spectral signature plot
Add highlighted item
to scatter plot
Selected or highlighted...

Scatter plot between band 1 and band 2

Scatter plot between band 1 and band 3

All pixels Training data
Scatter plot between band 3 and band 4

Spectral Signature Plot: Plot

Spectral Signature Plot: Signature Detail

Training area can be exported

IMAGE CLASSIFICATION

There are 3 classification algorithm for this
plugin
1) Minimum distance
2) Maximum Likelihood
3) Spectral Angle Mapping
h...

See your classification result

Run

Classification Report

https://fromgistors.blogspot.com/p/semi-automatic-classification-plugin.html
Accuracy assessment
• https://www.youtube.com...

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