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- W4308236211 abstract "In this paper we present an extension of rotation-based iterative Gaussianization (RBIG). Although RBIG has been successfully applied to many tasks, it is limited to medium dimensionality data (on the order of a thousand dimensions). In images its application has been restricted to small image patches or isolated pixels, because the rotation operation in RBIG is based on principal or independent component analysis and these transformations are difficult to learn and scale. Here we present Convolutional RBIG: an extension that alleviates this issue by imposing that the rotation in RBIG is a convolution. We propose to learn convolutional rotations (i.e. orthonormal convolutions) by optimising for the reconstruction loss between the input and an approximate inverse of the transformation using the transposed convolution operation. Additionally, we suggest different regularizers in learning orthonormal convolutions. For example, imposing sparsity in the activations leads to a transformation that extends convolutional independent component analysis to multilayer architectures. We also highlight how statistical properties of the data, such as multivariate mutual information, can be obtained. We illustrate the behavior of the transform with a simple example of texture synthesis, and analyze its properties by visualizing the stimuli that maximize the response in certain feature and layer." @default.
- W4308236211 created "2022-11-09" @default.
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- W4308236211 date "2022-10-16" @default.
- W4308236211 modified "2023-10-14" @default.
- W4308236211 title "Orthonormal Convolutions for the Rotation Based Iterative Gaussianization" @default.
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- W4308236211 doi "https://doi.org/10.1109/icip46576.2022.9897849" @default.
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