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@qsly09
qsly09 authored May 16, 2019
1 parent 3e4d5b0 commit db9f01f
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66 changes: 66 additions & 0 deletions BufferMasks.m
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function [cloud,shadow,snow] = BufferMasks(pcloud,cdpix,pshadow,csdpix,psnow,sdpix)
% BUFFERMASKS Dilate cloud/cloud shadow/snow with cdpix/csdpix/sdpix with
% default value of 3/3/3.
%
% Syntax
%
% [cloud,shadow,snow] =
% BufferMasks(pcloud,cdpix,pshadow,csdpix,psnow,sdpix)
%
% Description
%
% Dilate cloud/cloud shadow/snow with cdpix/csdpix/sdpix with
% default value of 3/3/3.
%
% Input arguments
% pcloud Cloud mask.
% cldpix Dilated number of pixels for cloud with default value of 3.
% pshadow Cloud shadow mask.
% sdpix Dilated number of pixels for cloud shadow value of 3.
% psnow Snow mask.
% snpix Dilated number of pixels for snow value of 3.
%
% Output arguments
%
% cloud Final dilated cloud mask.
% shadow Final dilated cloud shadow mask.
% snow Final dilated snow mask.
%
% Example
%
% [cloud,shadow,snow] =
% BufferMasks(pcloud,3,pshadow,3,psnow,3);
%
%
% Author: Shi Qiu (shi.qiu@ttu.edu)
% Date: 2. November, 2017

% buffer cloud
if cdpix>0
CEs=strel('square',2*cdpix+1);
cloud=imdilate(pcloud,CEs);
clear pcloud CEs cdpix;
else
cloud=pcloud;
clear pcloud
end
% buffer cloud shadow
if csdpix>0
CSEs=strel('square',2*csdpix+1);
shadow=imdilate(pshadow,CSEs);
clear pshadow CSEs csdpix;
else
shadow=pshadow;
clear pshadow
end
% buffer snow
if sdpix>0
SEs=strel('square',2*sdpix+1);
snow=imdilate(psnow,SEs);
clear psnow SEs sdpix;
else
snow=psnow;
clear psnow
end
end

36 changes: 36 additions & 0 deletions CDI.m
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function cdi = CDI(S2band7,S2band8,S2band8A)
%CDI This is used seprate bright surface from cloud by following David,
%2018 RSE
if ~isempty(S2band7)&&~isempty(S2band8)
ratio_8A_8 = S2band8./S2band8A;
clear S2band8;
ratio_8A_7 = S2band7./S2band8A;
clear S2band7 S2band8A;

std_ratio_8A_8 =stdfilt(ratio_8A_8, true(7));
clear ratio_8A_8;
var_ratio_8A_8 = std_ratio_8A_8 .^2;
clear std_ratio_8A_8;

std_ratio_8A_7 = stdfilt(ratio_8A_7, true(7));
clear ratio_8A_7;
var_ratio_8A_7 = std_ratio_8A_7 .^2;
clear std_ratio_8A_7;

cdi = (var_ratio_8A_7-var_ratio_8A_8)./(var_ratio_8A_8+var_ratio_8A_7);

% dim = size(cdi);
% cdi = imresize(cdi,1/7,'box');
% cdi = ordfilt2(cdi,1,ones(3,3));
% cdi = imresize(cdi,dim,'nearest');
% clear dim;


% h = fspecial('average', 21);
% cdi = filter2(h, cdi);
else
cdi = [];
end
end


224 changes: 224 additions & 0 deletions CheckImagesPath.m
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function [num_all_images, sensors, paths, info_count_text] = CheckImagesPath(path_data)
%CHECKIMAGEPATH Ensure the input path is right to find a Landsats 4-8, and
%Sentinel 2 image(s).
% path_data - the input path

% searching deeps. 0 is default.
[image_types_paths] = CheckImagePath(path_data,0);

% all count info foe searched images at current folder.
num_all_images = size(image_types_paths,1);
num_L4_tm = 0;
num_L5_tm = 0;
num_L6_tm = 0;
num_L7_tm_plus = 0;
num_L8_oli_tirs = 0;
num_S2A_msi = 0;
num_S2B_msi = 0;

% key info: the senor and path are needed as outputs, the first one is
% to determine the default parameters for Fmask, and the second one is
% to determine the path loading all data.
sensors = [];
paths = [];
info_count_text = [];

for i_all = 1:num_all_images
% c: current.
cimage_sensor = image_types_paths{i_all,1};
cimage_num = image_types_paths{i_all,2};
cimage_type = Convert2ImageType(cimage_sensor,cimage_num);
clear cimage_num;
cimage_path = image_types_paths{i_all,3};
switch cimage_type
case {'Landsat 4 TM'}
num_L4_tm=num_L4_tm+1;
case {'Landsat 5 TM'}
num_L5_tm=num_L5_tm+1;
case {'Landsat 6 TM'}
num_L6_tm=num_L6_tm+1;
case {'Landsat 7 ETM+'}
num_L7_tm_plus=num_L7_tm_plus+1;
case {'Landsat 8 OLI/TIRS'}
num_L8_oli_tirs=num_L8_oli_tirs+1;
case {'Sentinel 2A MSI'}
% further check Sentinel 2 image folder, see there is
% .SAFE.
if contains(cimage_path,'.SAFE')
num_S2A_msi=num_S2A_msi+1;
else
cimage_sensor = [];% no available Sentinel 2 data.
end
case {'Sentinel 2B MSI'}
% see there is .SAFE.
if contains(cimage_path,'.SAFE')
num_S2B_msi=num_S2B_msi+1;
else
cimage_sensor = [];% no available Sentinel 2 data.
end
end
if ~isempty(cimage_sensor)
sensors = [sensors;{cimage_sensor}];
paths = [paths;{cimage_path}];
end
clear cimage_sensor;
end
% renew num_all_images
num_all_images = length(sensors);
% used to notice user.
text_line = 0;
% multide
if isequal(num_all_images,num_L4_tm)||...
isequal(num_all_images,num_L5_tm)||...
isequal(num_all_images,num_L6_tm)||...
isequal(num_all_images,num_L7_tm_plus)||...
isequal(num_all_images,num_L8_oli_tirs)||...
isequal(num_all_images,num_S2A_msi)||...
isequal(num_all_images,num_S2B_msi)
% only for 1 type image
if num_L4_tm > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Landsat 4 TM images are found at ''%s''\n',...
num2str(num_L4_tm),path_data);
end
if num_L5_tm > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Landsat 5 TM images are found at ''%s''\n',...
num2str(num_L5_tm),path_data);
end
if num_L6_tm > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Landsat 6 TM images are found at ''%s''\n',...
num2str(num_L6_tm),path_data);
end
if num_L7_tm_plus > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Landsat 7 ETM+ images are found at ''%s''\n',...
num2str(num_L7_tm_plus),path_data);
end
if num_L8_oli_tirs > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Landsat 8 OLI/TIRS images are found at ''%s''\n',...
num2str(num_L8_oli_tirs),path_data);
end
if num_S2A_msi > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Sentinel 2A MSI images are found at ''%s''\n',...
num2str(num_S2A_msi),path_data);
end
if num_S2B_msi > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Sentinel 2B MSI images are found at ''%s''\n',...
num2str(num_S2B_msi),path_data);
end
else
text_line = text_line+1;
info_count_text{text_line} = sprintf(...
'A total of %s images (as follows) are found at ''%s''\n',...
num2str(num_all_images), path_data);
if num_L4_tm > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Landsat 4 TM images\n',...
num2str(num_L4_tm));
end
if num_L5_tm > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Landsat 5 TM images\n',...
num2str(num_L5_tm));
end
if num_L6_tm > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Landsat 6 TM images\n',...
num2str(num_L6_tm));
end
if num_L7_tm_plus > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Landsat 7 ETM+ images\n',...
num2str(num_L7_tm_plus));
end
if num_L8_oli_tirs > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Landsat 8 OLI/TIRS images\n',...
num2str(num_L8_oli_tirs));
end
if num_S2A_msi > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Sentinel 2A MSI images\n',...
num2str(num_S2A_msi));
end
if num_S2B_msi > 0
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s Sentinel 2B MSI images\n',...
num2str(num_S2B_msi));
end
end

% if no data is found, give mention info.
if isempty(sensors)
text_line = text_line+1;
info_count_text{text_line} = sprintf('%s available images are found at ''%s''\n',...
'0',path_data);
text_line = text_line+1;
info_count_text{text_line} = sprintf('Please ensure the path is correct\n');
end
% fprintf(info_count);
end

function [image_types_paths] = CheckImagePath(path_data,subfolder_level)
%CHECKIMAGEPATH Ensure the input path is right to find a Landsats 4-8, and
%Sentinel 2 image(s).
% path_data - the input path
% subfolder_level - the level of subfolders that can be used to limit
% searching deeps. 0 is default.

% If the searching deeps are more than 5, stop and return;
if subfolder_level > 5
image_types_paths = [];
return;
end
image_types_paths = [];
% first search the image(s) at current folder.image_types_paths
[sensor,num_Lst,~,~] = LoadSensorType(path_data);
if isempty(sensor)
% if no available image at current folder,
% and search its subfolders.
subfolders = dir(path_data);
for i_sub=1:length(subfolders)
% filter out the file names starting with '.', that is not
% right folder (system crashes).
if strcmp(subfolders(i_sub).name(1),'.')
continue;
end
% go to search the images at each subfolder
path_subfoler = fullfile(subfolders(i_sub).folder,...
subfolders(i_sub).name);
[image_types_paths_sub] = CheckImagePath(path_subfoler,subfolder_level+1);
if ~isempty(image_types_paths_sub)
image_types_paths =[image_types_paths;image_types_paths_sub];
end
end

else
% successfully searched a supported image.
% and, return the sensor and the image path
image_types_paths = [image_types_paths;{sensor,num_Lst,path_data}];
end
end
function image_type = Convert2ImageType(sensor,num_Lst)
% CONVERT@IMAGETYPE Contruct image type from the sensor and num

switch sensor
case 'L_TM'
image_type = ['Landsat ',num_Lst,' TM'];
case 'L_ETM_PLUS'
image_type = ['Landsat ',num_Lst,' ETM+'];
case 'L_OLI_TIRS'
image_type = ['Landsat ',num_Lst,' OLI/TIRS'];
case 'S_MSI'
image_type = ['Sentinel ',num_Lst,' MSI'];
otherwise
image_type=[];
% error(['Errors occur when searching images at ''', path_data],'''.');
end
end

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