diff --git a/articles/Gradient - Wikipedia/Gradient - Wikipedia.xopp.xml b/articles/Gradient - Wikipedia/Gradient - Wikipedia.xopp.xml
index 8c13dca..a438319 100644
--- a/articles/Gradient - Wikipedia/Gradient - Wikipedia.xopp.xml	
+++ b/articles/Gradient - Wikipedia/Gradient - Wikipedia.xopp.xml	
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diff --git a/articles/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation.xopp.xml b/articles/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation.xopp.xml
index 519ce53..69ea844 100644
--- a/articles/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation/On the Sensor Pattern Noise Estimation in Image Forensics: A Systematic Empirical Evaluation.xopp.xml	
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@@ -1011,6 +1144,23 @@ values, is it?</text>
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       <text font="Sans" size="11.00000000" x="315.90647063" y="443.02901126" color="#00c0ffff" ts="0" fn="">8</text>
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+      <teximage text="L \text{ was not defined for a given number of images it seems}" left="47.93486655" top="451.30092228" right="304.05786655" bottom="470.11892228"/>
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+      <text font="Sans" size="11.00000000" x="120.60824379" y="477.09580360" color="#00c0ffff" ts="0" fn="">unclear what we want high or low
+as far as I understand I would say
+respectively high and low</text>
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