What is the resolution of an image in ImageNet dataset?

Question

Does anyone know the resolution of an image in the ImageNet dataset?

I'm sorry, but I couldn't find it on their website or in any of the papers.

what about in mega bytes (MB)? – Charlie Parker Aug 07 '19 at 16:19 — Charlie Parker, Aug 07 '19 at 16:19
is the original 500 by 500? I see this on my end: `` – Charlie Parker Nov 02 '20 at 18:54 — Charlie Parker, Nov 02 '20 at 18:54

score 42 · Accepted Answer · answered Mar 24 '16 at 01:04

42

The images vary in dimensions and resolution. Many applications resize / crop all of the images to 256x256 pixels.

answered Mar 24 '16 at 01:04

Prune

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what about in mega bytes (MB)? – Charlie Parker Aug 07 '19 at 16:19
is the original 500 by 500? I see this on my end: `` – Charlie Parker Nov 02 '20 at 18:54
What "original" do you mean? The official ImageNet contest data, as I said, has a variety of sizes. – Prune Nov 02 '20 at 22:50
This is an independent question. Please post it as such. – Prune Jun 28 '22 at 19:17

ricoms · Answer 2 · 2020-05-26T15:18:43.360

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The average image resolution on ImageNet is 469x387 pixels. Normally it's applied a pre-processing that samples them to 256x256 as @Prune said, but it depends on the task at hand.

edited May 26 '20 at 15:18

answered Mar 23 '17 at 14:41

ricoms

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score 12 · Answer 3 · answered Oct 04 '19 at 16:46

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In a brief check of a random ImageNet 2012 folder (Fish)... The largest image is 4288 x 2848 pixels. The smallest image is 75 x 56 pixels. This is representative of the aspect ratio range.

answered Oct 04 '19 at 16:46

Avi Messica

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score 7 · Answer 4 · answered Mar 24 '16 at 14:14

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It depends of the picture but you can resize them. The smaller dimension of the picture should be at least 256 px and the aspect ratio should be intact.

answered Mar 24 '16 at 14:14

A. Attia

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To both conserve aspect ratio and have the same size on all images after resizing and padding (asssuming no cropping), the larger dimension must be specified, rather than the smaller one. – Elias Hasle Feb 22 '19 at 10:53

score 1 · Answer 5 · answered Feb 17 '21 at 10:08

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224 X 224 is used by most of the networks.

answered Feb 17 '21 at 10:08

mrtpk

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score 1 · Answer 6 · answered Oct 06 '21 at 07:57

There is a detailed answer to this in the following article: https://towardsdatascience.com/compression-in-the-imagenet-dataset-34c56d14d463

Essentially, most common image size is 500x500, however, there is a large distribution of image sizes. Typically, either the width or the height of an image is 500 pixels, if not both. Aspect ratios of 1:1, 4:3, 3:2 (and 3:4 and 2:3) are most common.

What is the resolution of an image in ImageNet dataset?

6 Answers6