{ "id": 11217, "title": "Color brightness calculation", "url": "/competitions/digit-recognizer/discussion/11217", "author_name": "", "post_date": "2014-12-12T12:39:25.420000", "votes": 0, "comment_count": 0, "views": null, "content": "

In the training set, the pixel values indicate the lightness or darkness of that pixel, with higher numbers meaning darker.

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I would like to know if any one know the formula that was used to calculate the brightness from a color used in the training and test data

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Thanks in advance

", "messages": [ { "id": 60096, "postDate": "2014-12-12T12:39:25.420Z", "content": "

In the training set, the pixel values indicate the lightness or darkness of that pixel, with higher numbers meaning darker.

\n

I would like to know if any one know the formula that was used to calculate the brightness from a color used in the training and test data

\n

Thanks in advance

" } ], "comments": [], "raw_markdown_by_id": { "60096": "" } }