Dimensionality of the intermediate-level representation of shape and texture in monkey V4

The visual area V4 has been considered to play a crucial role in the intermediate representation of objects, where low-level image features are transformed into object-level representations. We estimated the intrinsic dimensionality in V4 for the representation of local patches generated from natural scenes. The dimensionality was approximately 40, which is approximately half of that reported in IT for the representation of whole natural objects. The analyses of the estimated dimensionality suggest both common and independent representations that code contour shapes and/or surfaces with textures, implying a relatively complex and mixed representation in the intermediate-level area.(c) 2022 Elsevier Ltd. All rights reserved.

Automated summary

The visual area V4 is crucial in the intermediate representation of objects, transforming low-level image features into object-level representations. The estimated intrinsic dimensionality in V4 for local patches generated from natural scenes is approximately 40, which is about half of that reported in IT for whole natural objects. The analysis suggests that V4 has both common and independent representations for contour shapes and/or surfaces with textures, indicating a relatively complex and mixed representation in this intermediate-level area.