These files were originally created by Prof. Shinya Yamamoto and later modified by Prof. Hyoung F. Kim and colleagues.

Please see the papers using these fractal images

2023 Nat. Commun. Seong-Hwan Hwang, Doyoung Park, Ji-Woo Lee, Sue-Hyun Lee & Hyoung F. Kim Convergent representation of values from tactile and visual inputs for efficient goal-directed behavior in the primate putamen

2022 iScience Seong-Hwan Hwang, Yongsoo Ra, Somang Paeng, and Hyoung F. Kim Motivational salience drives habitual gazes during value memory retention and facilitates relearning of forgotten value

2021 Nat. Commun. Joonyoung Kang, Hyeji Kim, Seong Hwan Hwang, Minjun Han, Sue-Hyun Lee & Hyoung F. Kim Primate ventral striatum maintains neural representations of the value of previously rewarded objects for habitual seeking

2015 Cell Kim HF*, Ghazizadeh A, Hikosaka O Dopamine neurons encoding long-term memory of object value for habitual behavior

2013 Neuron Kim HF* and Hikosaka O
Distinct basal ganglia circuits controlling behaviors guided by flexible and stable values.

The luminance of each image can be adjusted using the luminance_correction_rev1.m script.

Important: To generate a unique set of fractal images, please run the code only once. Running the code multiple times without modification may result in identical fractal images across sets.

Have a good experiment and enjoy it!