Intel ippi for 10 bit video processing

karthi127 — Thu, 20 May 2021 11:56:20 GMT

How can i use intel ippi for processing a 10 bit video?

If the memory allocated is 16 bits and 10 bits is used with 6 null bits then i can use ipp16u datatype.

If it uses 10 bits only. Then how do i convert it to suitable format for processing using ippi.

Thank you

Re:Intel ippi for 10 bit video processing

NoorjahanSk_Intel — Fri, 21 May 2021 12:48:03 GMT

Hi Karthik,

Thanks for reaching out to us.

We are looking into this issue internally. We will get back to you soon.

Thanks & Regards

Noorjahan

Re: Intel ippi for 10 bit video processing

Abhinav_S_Intel — Tue, 01 Jun 2021 21:16:40 GMT

Hi Karthik,

IPP does not have a direct API for 10bit conversion. Here are supported conversion types:

https://software.intel.com/content/www/us/en/develop/documentation/ipp-dev-reference/top/volume-2-image-processing/image-data-exchange-and-initialization-functions/convert-1.html

There is a great Stack Overflow question that is basically the same question as yours and there is also some good discussion in the post as well. Here is the link:

https://stackoverflow.com/questions/49186569/converting-an-image-with-n-bit-bit-depth-to-a-16-bit-bit-depth-image-with-intel

Datatypes are based on the processor architecture. Usually they are a fraction or multiple of the word length.

Hence with modern CPUs and therefor in modern programming languages there is no 12bit datatype. You have 64, 32, 16, 8 of addressable memory.

But no one stops you from putting a smaller number of bits into a register.

So if you want to store 12bit you usually store them in the lower 12bits of a 16bit type.

Thats's why image processing algorithm usually support 8, 16,... bit. You can use any 16bit algorithm to work on 12bit intensity information as you would on 16bit.

In some cases you may scale the 12bit information to 16bit. But in most cases that is not necessary.

Scaling 12 to 16bit is simple math. 12bit_value / (2^12-1) = 16bit_value / (2^16-1). Of course you may also refer your 12bit value to the maximum value in the image instead of 2^12. Then you would always use the full 16bit.

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Abhinav

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Intel ippi for 10 bit video processing

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