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dscully's avatar
dscully
Icon for New Contributor rankNew Contributor
1 year ago
Solved

Tone Mapping Operator IP Malfunctioning

Hello, I am currently evaluating the Tone Mapping Operator IP from the Video and Vision Processing Suite for integration into our video camera product. The issue is that when attempting to enable...
  • Wincent_Altera's avatar
    Wincent_Altera
    11 months ago

    Hi @dscully David,

    Does this IP have undocumented restrictions on input resolution?
    >> Yes, there is restrictions on the input resolution.

    For the input width, it needs to be multiple of the pixels in parallels (PIP) and the number of internal tiles (it is fixed as 4)

    • So, if PIP = 4 and Number of tiles = 4, then the width needs to be multiple of 4x4 = 16
    • For the given two widths you could see that condition is not met, 1944/16 = 121.5 and 3268/16=204.25
    • I suggest your to try: 1952 for the first case,
      • and 3280 for the second case, then if need be, you could use a clipper to put the width back to your desired width.
    • For the input height, it needs to be multiple of the number of internal tiles (it is fixed as 4)
      • In this case, your current values are both fine.


    Regards,
    Wincent_Altera

dscully's avatar
dscully
Icon for New Contributor rankNew Contributor
11 months ago

Hi Wincent,

Can you confirm with the IP designers if there are other restrictions? Why does the IP malfunction if 1944x1092
3268x1840 are used since both widths are divisible by 4? Reminder that 800x800 and 1920x1080 function correctly in 4 pixels-in-parallel mode.

Thank you,

David

Wincent_Altera's avatar
Wincent_Altera
Icon for Regular Contributor rankRegular Contributor
11 months ago

Hi @dscully David,

Does this IP have undocumented restrictions on input resolution?
>> Yes, there is restrictions on the input resolution.

For the input width, it needs to be multiple of the pixels in parallels (PIP) and the number of internal tiles (it is fixed as 4)

  • So, if PIP = 4 and Number of tiles = 4, then the width needs to be multiple of 4x4 = 16
  • For the given two widths you could see that condition is not met, 1944/16 = 121.5 and 3268/16=204.25
  • I suggest your to try: 1952 for the first case,
    • and 3280 for the second case, then if need be, you could use a clipper to put the width back to your desired width.
  • For the input height, it needs to be multiple of the number of internal tiles (it is fixed as 4)
    • In this case, your current values are both fine.


Regards,
Wincent_Altera