diff --git a/articles/Gradient-domain image processing - Wikipedia/Gradient-domain image processing - Wikipedia.pdf.txt b/articles/Gradient-domain image processing - Wikipedia/Gradient-domain image processing - Wikipedia.pdf.txt
new file mode 100644
index 0000000..880d8a3
--- /dev/null
+++ b/articles/Gradient-domain image processing - Wikipedia/Gradient-domain image processing - Wikipedia.pdf.txt	
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diff --git a/articles/Gradient-domain image processing - Wikipedia/Gradient-domain image processing - Wikipedia.xopp.xml b/articles/Gradient-domain image processing - Wikipedia/Gradient-domain image processing - Wikipedia.xopp.xml
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