Talk:Convolutional neural network

Feature Maps
Need to introduce what feature maps are for nontechnical readers. — Preceding unsigned comment added by Shsh16 (talk • contribs) 18:24, 15 February 2017 (UTC)

Non-linear Pooling
It says in the article: "Another important concept of CNNs is pooling, which is a form of non-linear down-sampling."

I don't think this is correct. There are pooling techniques, like average pooling which is mentioned in this same section, which are forms of linear down-sampling. I would remove the "non-linear." 194.117.26.63 (talk) 15:06, 13 May 2016 (UTC)

Plagiarism in "Layer patterns"
The text seems is copied from https://cs231n.github.io/convolutional-networks/#layerpat without any attribution — Preceding unsigned comment added by Jkoab (talk • contribs) 01:41, 8 June 2016 (UTC)


 * Indeed. Deleted copyvio text, see below. Maproom (talk) 09:55, 8 June 2016 (UTC)

Copyright problem removed
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Suggestion: Move the section "Regularization methods" to a new page
The methods listed here are applicable to deep learning in general. This topic should be moved into a new page. OhadRubin (talk) 06:38, 27 November 2018 (UTC)

Parameter Sharing Clarifications
In the "Parameter sharing" section, "relax the parameter sharing scheme" is written, but what this actually means is unclear. — Preceding unsigned comment added by Ephsc (talk • contribs) 16:22, 27 September 2019 (UTC)

What is convolutional about a convolutional neural network?
The article fails to explain what the connection between CNNs and convolutions are in any meaningful way. In particular, convolutions don't act on vectors; they act on functions. Comparing with the equation on the page for convolutions, there's obviously something analogous. --Stellaathena (talk) 16:51, 14 December 2020 (UTC)

its actually the dsp version of a cross correlation, not a convolution. its a misnomer to call it convolution.-AS

Inaccurate information about Convolutional layers
Convolutional layers do not do convolutions. They do what is called "Cross correlation" in DSP, which is different than the statistics definition of cross correlation. https://en.wikipedia.org/wiki/Cross-correlation

This article says multiple times that the convolution operation is being done, and it links to the convolution article https://en.wikipedia.org/wiki/Convolution

This is misleading because it does not do this operation linked in the article. It does the operation linked in the cross correlation articles. -AS

Inacurate information: Convolutional models are not regularized versions of fully connected neural networks
In the second paragraph of the introduction, it is mentioned that "CNNs are regularized versions of multilayer perceptions." I think the idea is inaccurate. The entire paragraph describe convolutional models as regularized versions of fully connected models, and I don't think that is a good description. I think the idea of inductive bias would be better then that of regularization to explain convolutions.

I would also suggest merging the section "Definition" into the introduction. The definition section is only two sentences and it feels it would be better placed at the introduction.

Misleading use of the term tensor
The article uses the term tensor in the sense of multi-dimensional array. But the link redirects to the article with mathematical definition. These terms in computer science (namely in the library tensorflow) and in mathematics are completely different. It's necessary to change at least the reference to. But it's better to avoid the ambiguous use of mathematical terminology.

Max 88.201.254.120 (talk) 22:39, 10 April 2022 (UTC)

Merge Architecture and Building Blocks sectdions
Much overlap with no clear distinction. Lfstevens (talk) 00:36, 7 February 2023 (UTC)

Acronym ANN
The use or the acronym ANN for artificial neural networks is novel to me, and I wonder whether it needlessly clutters the opening sentence. Have others worked in areas where ANN is common? Babajobu (talk) 04:55, 24 March 2023 (UTC)

Article is incomprehensible to the intelligent layman
No blame, it's an excellent start, but I think we can write this so that it's more easily parsed by an intelligent person outside the field who is willing to put in some mental work. Babajobu (talk) 04:57, 24 March 2023 (UTC)


 * No kidding. Whoever wrote this seemed in a hurry to jump right into how CNNs work and what the technical differences are between CNNs and other machine learning architectures, with numerical examples.
 * That information does belong here, but further down in the article. This whole thing needs to be rearranged by an Expert who is also a good Explainer, to lead off with answers to simple questions.
 * What is a CNN?
 * What problems can it solve that other approaches can not, or solve more efficiently?
 * Is CNN an example of a wider family of architectures? If so, compare and contrast with its relatives in that family tree.
 * Some of these answers may already be embedded in the article, but the article makes the reader work too hard to find them.
 * You gotta tell people where you are taking them, and WHY, before you start describing, in detail, the steps you take to get there. 2601:283:4F81:4B00:35A1:9FF5:C8CF:11AF (talk) 21:10, 28 October 2023 (UTC)

Hyperparameters
I have a question or a problem with explanation of hyperparameters.

1. Hyperparameters are first explained in Spatial arrangement subsection of Convolutional layer. Three hyperparameters are listed, which affect the output size. Here, I believe, kernel size K is missing, which is mentioned right away in the next paragraph.

2. In the Hyperparameters section, we have kernel size and filter size. By my understanding, these two parameters should be the same thing? Additionally, number of filters uses depth as the number of convolutional+pooling layers, whereas depth in the Spatial arrangement (my previous point) uses depth as a number of filters. En odveč (talk) 12:32, 30 March 2023 (UTC)

Incorrect description of feed-forward neural network under "Architecture"
In the "Architecture"-section, the article states: " In any feed-forward neural network, any middle layers are called hidden because their inputs and outputs are masked by the activation function and final convolution."

This is not correct:

- There is not a final convolution in all feed-forward neural networks.

- The middle layers are called hidden, but not "because their inputs and outputs are masked by the activation function and final convolution." They are called hidden because they are not "externally visible".

Rfk732 (talk) 15:48, 8 April 2023 (UTC)


 * I have removed the sentence. Rfk732 (talk) 10:38, 13 April 2023 (UTC)

Empirical and explicit regularization?
The section Regularization methods has two different subsections: Empirical and Explicit. What do we mean by empirical? And what do we mean by explicit? —Kri (talk) 12:43, 20 November 2023 (UTC)

Introduction
"only 25 neurons are required to process 5x5-sized tiles". Shouldn't that be "weights" and not "neurons"? Earlier it said "10,000 weights would be required for processing an image sized 100 × 100 pixels". Ulatekh (talk) 15:53, 19 March 2024 (UTC)