Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Submit feedback
Contribute to GitLab
Sign in
Toggle navigation
GeoSentinel
Project
Project
Details
Activity
Releases
Cycle Analytics
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Charts
Issues
0
Issues
0
List
Board
Labels
Milestones
Merge Requests
0
Merge Requests
0
CI / CD
CI / CD
Pipelines
Jobs
Schedules
Charts
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Charts
Create a new issue
Jobs
Commits
Issue Boards
Open sidebar
Mario Chirinos Colunga
GeoSentinel
Commits
c1ac556c
Commit
c1ac556c
authored
Sep 10, 2018
by
Mario Chirinos Colunga
💬
Browse files
Options
Browse Files
Download
Plain Diff
Merge branch 'master' of gitlab.geoint.mx:adan.salazar/GeoSentinel
Adan
parents
414ebd0c
1d03a0ac
Changes
1
Hide whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
148 additions
and
0 deletions
+148
-0
s1ca.py
examples/s1ca.py
+148
-0
No files found.
examples/s1ca.py
0 → 100644
View file @
c1ac556c
# -*- coding: utf-8 -*-
"""
Created on Tue Sep 7 10:30:42 2018
@author: A. Salazar,
"""
# ######################### Importa bibliotecas ############################## #
import
sys
from
snappy
import
jpy
from
snappy
import
ProductIO
from
snappy
import
GPF
from
snappy
import
HashMap
import
numpy
as
np
from
skimage
import
filters
import
os
from
distutils.dir_util
import
copy_tree
# Extrae información sobre el producto Sentinel1 GRD solicitado -- sentinel_1_path
# Regresa la información del producto -- product
def
read_metadata
(
sentinel_1_path
):
sentinel_1_metadata
=
"manifest.safe"
#s1prd = "%sSAFE/%s" % (sentinel_1_path, sentinel_1_metadata)
s1prd
=
"
%
s/
%
s"
%
(
sentinel_1_path
,
sentinel_1_metadata
)
reader
=
ProductIO
.
getProductReader
(
"SENTINEL-1"
)
product
=
reader
.
readProductNodes
(
s1prd
,
None
)
return
product
# Generara los coeficientes de retrodispersión de las bandas VV
# del producto solicitado -- input_product
# Regresa con calibración radiométrica -- calibrate_product
def
radiometric_calibration
(
input_product
):
parameters
=
HashMap
()
parameters
.
put
(
'auxFile'
,
'Latest Auxiliary File'
)
parameters
.
put
(
'outputSigmaBand'
,
True
)
parameters
.
put
(
'selectedPolarisations'
,
'VV'
)
calibrate_product
=
GPF
.
createProduct
(
'Calibration'
,
parameters
,
input_product
)
return
calibrate_product
#Realiza el filtrado del speckle al producto previamente calibrado -- calibrate
#Regresa el producto filtrado -- speckle
def
speckle_filtering
(
calibrate
):
parameters
=
HashMap
()
parameters
.
put
(
'filter'
,
'Lee'
)
parameters
.
put
(
'filterSizeX'
,
7
)
parameters
.
put
(
'filterSizeY'
,
7
)
parameters
.
put
(
'dampingFactor'
,
2
)
parameters
.
put
(
'edgeThreshold'
,
5000.0
)
parameters
.
put
(
'estimateENL'
,
True
)
parameters
.
put
(
'enl'
,
1.0
)
speckle
=
GPF
.
createProduct
(
'Speckle-Filter'
,
parameters
,
calibrate
)
return
speckle
#Encuentra el umbral optimo mediante el método de Otsu
#Aplica el umbral encontrado al producto de entrada --speckle
#Este umbral separa lo que es agua de lo que no es agua
#Regresa el producto umbralizado -- agua_otsu
#Los valores en blaco representan los cuerpos de agua
def
water_detection_otsu
(
speckle
):
paramToDB
=
HashMap
()
paramToDB
.
put
(
'sourceBandNames'
,
'Sigma0_'
+
'VV'
)
img1
=
GPF
.
createProduct
(
"LinearToFromdB"
,
paramToDB
,
speckle
)
img2
=
img1
.
getBand
(
'Sigma0_VV_db'
)
w
=
img2
.
getRasterWidth
()
h
=
img2
.
getRasterHeight
()
img1_data
=
np
.
zeros
(
w
*
h
,
np
.
float32
)
img2
.
readPixels
(
0
,
0
,
w
,
h
,
img1_data
)
val
=
filters
.
threshold_otsu
(
img1_data
)
# Otsu method is applied
threshold
=
val
expression
=
"Sigma0_VV_db <
%
s"
%
threshold
BandDescriptor
=
jpy
.
get_type
(
'org.esa.snap.core.gpf.common.BandMathsOp$BandDescriptor'
)
targetBand
=
BandDescriptor
()
targetBand
.
name
=
'agua_Otsu'
targetBand
.
type
=
'Float32'
targetBand
.
expression
=
expression
targetBands
=
jpy
.
array
(
'org.esa.snap.core.gpf.common.BandMathsOp$BandDescriptor'
,
1
)
targetBands
[
0
]
=
targetBand
parameters
=
HashMap
()
parameters
.
put
(
'targetBands'
,
targetBands
)
#parameters.put('nodataValueAtSea', True)
agua_otsu
=
GPF
.
createProduct
(
'BandMaths'
,
parameters
,
img1
)
return
agua_otsu
def
create_outputdirectory
(
directory_name
):
if
not
os
.
path
.
exists
(
directory_name
):
os
.
makedirs
(
directory_name
)
# ############################### Programa principal ################################## #
if
len
(
sys
.
argv
)
!=
2
:
print
(
"usage:
%
s < .SAFE file > "
%
sys
.
argv
[
0
])
sys
.
exit
(
1
)
imagefullpath
=
sys
.
argv
[
1
]
# prepara salida
s1_pos
=
imagefullpath
.
find
(
'S1'
)
image_name
=
imagefullpath
[
s1_pos
:]
image_name
=
image_name
.
replace
(
'GRDH'
,
'GRDHCA'
)
# crea directorio de salida
directory
=
os
.
path
.
dirname
(
imagefullpath
)
os
.
chdir
(
directory
)
#create_outputdirectory(image_name)
ca_directory
=
image_name
+
'
\\
IMG_DATA
\\
ca'
create_outputdirectory
(
ca_directory
)
#copia datos de antiguo directorio
copy_tree
(
imagefullpath
,
image_name
)
# inicia preprocesamiento para CA
sentinel_1_path
=
imagefullpath
#[:-5]
# Lee metadato
product
=
read_metadata
(
sentinel_1_path
)
# Aplica calibración radiométrica
calibrate
=
radiometric_calibration
(
product
)
# Aplica filtrado speckle
speckle
=
speckle_filtering
(
calibrate
)
# Realiza la detección de cuerpos de agua
agua_bin
=
water_detection_otsu
(
speckle
)
# Salva Geotiff con cuerpos de agua
ifg_output
=
ca_directory
+
"
\\
"
+
image_name
[:
-
5
]
+
"_Otsu"
ProductIO
.
writeProduct
(
agua_bin
,
ifg_output
,
'GeoTIFF'
)
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment