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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (c) 2010, 2011, 2012, 2013.
# Author(s):
# Martin Raspaud <martin.raspaud@smhi.se>
# Lars Ørum Rasmussen <ras@dmi.dk>
# This file is part of mpop.
# mpop is free software: you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.
# mpop is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
# You should have received a copy of the GNU General Public License along with
# mpop. If not, see <http://www.gnu.org/licenses/>.
"""This module defines the generic VISIR instrument class.
"""
from mpop.imageo import geo_image
from mpop.compositer import Compositer
#pylint: disable=W0612
# remove warnings for unused prerequisites
class VisirCompositer(Compositer):
def __call__(self, *channels, **keys):
"""Build a geoimage.
e.g.:
img = l.image(0.6, 0.8, -10.8, mode="RGB")
"""
data = []
area = None
inv = []
new_channels = []
for channel in channels:
if isinstance(channel, str):
if channel.startswith("-"):
inv.append(True)
channel = channel[1:]
else:
inv.append(False)
else:
if channel < 0:
inv.append(True)
channel = -channel
else:
inv.append(False)
new_channels.append(channel)
data.append(self[channel].data)
new_area = self[channel].area
if area and (new_area != area):
raise ValueError("Channels should have the same area")
else:
area = new_area
self.check_channels(*new_channels)
img = geo_image.GeoImage(data,
area=area,
time_slot=self.time_slot,
fill_value=keys.get("fill_value", None),
mode=keys.get("mode", None))
img.enhance(inverse=inv,
gamma=keys.get("gamma", 1.0),
stretch=keys.get("stretch", "no"))
return img
def channel_image(self, channel, fill_value=0):
"""Make a black and white image of the *channel*.
"""
self.check_channels(channel)
img = geo_image.GeoImage(self[channel].data,
self[channel].area,
self.time_slot,
fill_value=fill_value,
mode="L")
img.enhance(stretch="crude")
return img
def overview(self, stretch='crude', gamma=1.6):
"""Make an overview RGB image composite.
"""
self.check_channels(0.635, 0.85, 10.8)
ch1 = self[0.635].check_range()
ch2 = self[0.85].check_range()
ch3 = -self[10.8].data
img = geo_image.GeoImage((ch1, ch2, ch3),
self.area,
self.time_slot,
fill_value=(0, 0, 0),
mode="RGB")
if stretch:
img.enhance(stretch=stretch)
if gamma:
img.enhance(gamma=gamma)
return img
overview.prerequisites = set([0.635, 0.85, 10.8])
def natural(self, stretch=None, gamma=1.8):
"""Make a Natural Colors RGB image composite.
"""
self.check_channels(0.635, 0.85, 1.63)
ch1 = self[1.63].check_range()
ch2 = self[0.85].check_range()
ch3 = self[0.635].check_range()
img = geo_image.GeoImage((ch1, ch2, ch3),
self.area,
self.time_slot,
fill_value=(0, 0, 0),
mode="RGB",
crange=((0, 90),
(0, 90),
(0, 90)))
if stretch:
img.enhance(stretch=stretch)
if gamma:
img.enhance(gamma=gamma)
return img
natural.prerequisites = set([0.635, 0.85, 1.63])
def airmass(self):
"""Make an airmass RGB image composite.
+--------------------+--------------------+--------------------+
| Channels | Temp | Gamma |
+====================+====================+====================+
| WV6.2 - WV7.3 | -25 to 0 K | gamma 1 |
+--------------------+--------------------+--------------------+
| IR9.7 - IR10.8 | -40 to 5 K | gamma 1 |
+--------------------+--------------------+--------------------+
| WV6.2 | 243 to 208 K | gamma 1 |
+--------------------+--------------------+--------------------+
"""
self.check_channels(6.7, 7.3, 9.7, 10.8)
ch1 = self[6.7].data - self[7.3].data
ch2 = self[9.7].data - self[10.8].data
ch3 = self[6.7].data
img = geo_image.GeoImage((ch1, ch2, ch3),
self.area,
self.time_slot,
fill_value=(0, 0, 0),
mode="RGB",
crange=((-25, 0),
(-40, 5),
(243, 208)))
return img
airmass.prerequisites = set([6.7, 7.3, 9.7, 10.8])
def vis06(self):
"""Make a black and white image of the VIS 0.635um channel.
"""
return self.channel_image(0.6)
vis06.prerequisites = set([0.635])
def ir108(self):
"""Make a black and white image of the IR 10.8um channel.
"""
self.check_channels(10.8)
img = geo_image.GeoImage(self[10.8].data,
self.area,
self.time_slot,
fill_value=0,
mode="L",
crange=(-70 + 273.15, 57.5 + 273.15))
img.enhance(inverse=True)
return img
ir108.prerequisites = set([10.8])
def wv_high(self):
"""Make a black and white image of the IR 6.7um channel."""
self.check_channels(6.7)
img = geo_image.GeoImage(self[6.7].data,
self.area,
self.time_slot,
fill_value=0,
mode="L")
img.enhance(inverse = True, stretch = "linear")
return img
wv_high.prerequisites = set([6.7])
def wv_low(self):
"""Make a black and white image of the IR 7.3um channel."""
self.check_channels(7.3)
img = geo_image.GeoImage(self[7.3].data,
self.area,
self.time_slot,
fill_value=0,
mode="L")
img.enhance(inverse = True, stretch = "linear")
return img
wv_low.prerequisites = set([7.3])
def green_snow(self):
"""Make a Green Snow RGB image composite.
"""
self.check_channels(0.635, 1.63, 10.8)
ch1 = self[1.63].check_range()
ch2 = self[0.635].check_range()
ch3 = -self[10.8].data
img = geo_image.GeoImage((ch1, ch2, ch3),
self.area,
self.time_slot,
fill_value=(0, 0, 0),
mode="RGB")
img.enhance(stretch = "crude")
img.enhance(gamma = 1.6)
return img
green_snow.prerequisites = set([0.635, 1.63, 10.8])
def red_snow(self):
"""Make a Red Snow RGB image composite.
"""
self.check_channels(0.635, 1.63, 10.8)
ch1 = self[0.635].check_range()
ch2 = self[1.63].check_range()
ch3 = -self[10.8].data
img = geo_image.GeoImage((ch1, ch2, ch3),
self.area,
self.time_slot,
fill_value=(0, 0, 0),
mode="RGB")
img.enhance(stretch = "crude")
return img
red_snow.prerequisites = set([0.635, 1.63, 10.8])
def convection(self):
"""Make a Severe Convection RGB image composite.
"""
self.check_channels(0.635, 1.63, 3.75, 6.7, 7.3, 10.8)
ch1 = self[6.7].data - self[7.3].data
ch2 = self[3.75].data - self[10.8].data
ch3 = self[1.63].check_range() - self[0.635].check_range()
img = geo_image.GeoImage((ch1, ch2, ch3),
self.area,
self.time_slot,
fill_value=(0, 0, 0),
mode="RGB",
crange=((-30, 0),
(0, 55),
(-70, 20)))
return img
convection.prerequisites = set([0.635, 1.63, 3.75, 6.7, 7.3, 10.8])
def dust(self):
"""Make a Dust RGB image composite.
"""
self.check_channels(8.7, 10.8, 12.0)
ch1 = self[12.0].data - self[10.8].data
ch2 = self[10.8].data - self[8.7].data
ch3 = self[10.8].data
img = geo_image.GeoImage((ch1, ch2, ch3),
self.area,
self.time_slot,
fill_value=(0, 0, 0),
mode="RGB",
crange=((-4, 2),
(0, 15),
(261, 289)))
img.enhance(gamma=(1.0, 2.5, 1.0))
return img
dust.prerequisites = set([8.7, 10.8, 12.0])
def ash(self):
"""Make a Ash RGB image composite.
"""
self.check_channels(8.7, 10.8, 12.0)
ch1 = self[12.0].data - self[10.8].data
ch2 = self[10.8].data - self[8.7].data
ch3 = self[10.8].data
img = geo_image.GeoImage((ch1, ch2, ch3),
self.area,
self.time_slot,
fill_value=(0, 0, 0),
mode="RGB",
crange=((-4, 2),
(-4, 5),
(243, 303)))
return img
ash.prerequisites = set([8.7, 10.8, 12.0])
def fog(self):
"""Make a Fog RGB image composite.
"""
self.check_channels(8.7, 10.8, 12.0)
ch1 = self[12.0].data - self[10.8].data
ch2 = self[10.8].data - self[8.7].data
ch3 = self[10.8].data
img = geo_image.GeoImage((ch1, ch2, ch3),
self.area,
self.time_slot,
fill_value=(0, 0, 0),
mode="RGB",
crange=((-4, 2),
(0, 6),
(243, 283)))
img.enhance(gamma=(1.0, 2.0, 1.0))
return img
fog.prerequisites = set([8.7, 10.8, 12.0])
def night_fog(self):
"""Make a Night Fog RGB image composite.
"""
self.check_channels(3.75, 10.8, 12.0)
ch1 = self[12.0].data - self[10.8].data
ch2 = self[10.8].data - self[3.75].data
ch3 = self[10.8].data
img = geo_image.GeoImage((ch1, ch2, ch3),
self.area,
self.time_slot,
fill_value=(0, 0, 0),
mode="RGB",
crange=((-4, 2),
(0, 6),
(243, 293)))
img.enhance(gamma=(1.0, 2.0, 1.0))
return img
night_fog.prerequisites = set([3.75, 10.8, 12.0])
def cloudtop(self, stretch=(0.005, 0.005), gamma=None):
"""Make a Cloudtop RGB image composite.
"""
self.check_channels(3.75, 10.8, 12.0)
ch1 = -self[3.75].data
ch2 = -self[10.8].data
ch3 = -self[12.0].data
img = geo_image.GeoImage((ch1, ch2, ch3),
self.area,
self.time_slot,
fill_value=(0, 0, 0),
mode="RGB")
if stretch:
img.enhance(stretch=stretch)
if gamma:
img.enhance(gamma=gamma)
return img
cloudtop.prerequisites = set([3.75, 10.8, 12.0])
#pylint: enable=W0612
|
