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How does OpenCV ensure that Mat::data is correctly aligned?

16bytes_alignment

asked 2018-08-02 09:18:13 -0600

c--
1

Suppose I have a matrix whose elements are shorts, e.g. 16UC1. The actual data in a Mat is stored in a uchar array pointed to by Mat::data. Could anyone point me to the bit of code that ensures that the uchar* is actually correctly aligned for 16-bit elements? Thank you.

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answered 2018-08-02 10:26:17 -0600

matman
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Take a look here and here

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Brilliant, thank you! Presumably if I use one of the Mat constructors that takes a void* argument, it is my own fault if it isn't aligned properly.

c-- ( 2018-08-03 04:11:52 -0600 )edit

If you use Mat with void* your data alignment is unchanged. This is only a Mat wrapper around your data and does not copy any data.

matman ( 2018-08-03 12:41:49 -0600 )edit

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Asked: 2018-08-02 09:18:13 -0600

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Last updated: Aug 02 '18

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