'Grandma´s gem' - Scaled up and spliced
It seemed simple for a photographer to make grandmas old gem more valuable by enlaging it with image editing tools such als photoshop.
He took a photo, enlarged the gemstone an re inserted it in the original image (left).
Traces of scaling (resampling) made it possible to detect this forgery.
The kryw-colourmap represents the probability of forgery from low to high (right).
Overlay of forged image and heatmap image (middle).
Colour coded probability of forgery: [low] 
[high]
Image splicing is a simple process that crops and pastes regions from the same or separate sources. It is a fundamental step used in digital photomontage, which refers to a paste-up produced by sticking together images using digital tools such as Photoshop. [Ng2004d].
< Previous sample | Next sample >
References: Splicing detection
AlAhmadi2013, Alahmadi2016, Amerini2015b, Amerini2014c, Ananya2011, Ananya2012, Asati2014, Asghar2016, Bahrami2015a, Bahrami2015, Bahrami2013, Barni2013a, Bestagini2016a, Bian2013, Binnar2015, Birajdar2013a, Bo2014, Cao2012d, Carvalho2016, Carvalho2015a, Carvalho2013, Chen2013b, Chen2008d, Chen2007a, Chen2011c, Chennamma2011, Ciptasari2012, Ciptasari2013a, Conotter2013, Cozzolino2015, Dai2010, Deng2013, Dong2008, Dybala2007, El-Alfy2014, Fan2015d, Fang2009, Fang2010, Farid2006, Fontani2013a, Fontani2014, Francis2014, Fu2006, Fusheng2015, Garcia-Ordas2013, Gubrud2015, Hakimi2015, Hakimi2015a, Han2016, Han2016a, Hashmia2016, He2012, He2011, Hou2015, Hou2013a, Hsu2010, Hsu2006, Hsu2007, Hu2015, Hussain2014, Ibrahim2015, Iuliani2015, Jing2006, Julliand2015, Julliand2016, Kaizhen2011, Kakar2010, Kakar2010a, Kakar2011a, Kashyap2015, Kato2014, Kaur2016, Ke2014, Khamankar2014, Korus2016, Lee2015b, Li2015c, Li2010i, Li2013c, Liang2013, Liang2015, Lin2011a, Liu2015, Liu2011, Liu2012a, Liu2013a, Liu2009, Liu2011f, Lyu2013a, Mahalakshmi2011, Makkena2014, Malik2015, Malviya2012, Manu2015, Manudhane2013, Mire2013, Mire2014, Mishra2013a, Mishra2014, Moghaddasi2014, Moghaddasi2015, Muhammad2013a, Mushtaq2014a, Ng2004a, Ng2004b, Ng2004d, Ng2004, Pan2015, Pan2012, Pan2012a, Pandey2016a, Park2016, Park2016b, Park2016a, Peng2016, Pujari2012, Pun2016, PurnachandraRao2013, Purohit2016, Purwandari2015, Qazi2013, Qidan2010, Qu2008, Qu2009, Qureshi2015, Rad2015, Rao2014, Ryu2014a, Shi2007, Shi2008a, Shi2015, Shih, Shingote2015, Singh2015b, Song2014, Sonu2015, Su2014, Su2013, Tong2013, Vaishnavi2016, Wang2012, Wang2014, Wang2009c, Warbhe2016, Weimin2008, Williams2016, Williams2016a, Wu2011a, Xia2016, Xiang-Dan2009, Xiao2014, Xu2014, Xu2013, Yang2011, Yang2008, Yao2016, Ye2012, Youseph2015, Zampoglou2015, Zampoglou2016a, Zeng2016c, Zhan2016, Zhang2009b, Zhang_2016, Zhang2016a, Zhang2010, Zhang2015, Zhang2012a, Zhang2013, Zhang2008g, Zhang2008a, Zhang2010d, Zhang2008b, Zhao2011a, Zhao2012a, Zhao2012, Zhao2014, Zhao2015a, Zhao2013, Zheng2010, Zhong2012, Zhou2010.