Need resizer coefficients from D1(720x480) -> QVGA(320x240)

Sean Tsai

Intellectual 375 points

Does anyone knows the coefficients?

over 14 years ago

0 Anshuman Saxena over 14 years ago

TI__Mastermind 19985 points

Which coefficients are you looking for? Is there some problem with the default parameters of the resizer on DM36x?

Regards,

anshuman

0 Sean Tsai over 14 years ago in reply to Anshuman Saxena

Intellectual 375 points

I use DM6437 sample code's coefficients 640x480 -> 320x240 :

#define gRDRV_reszFilter4TapHighQuality 0, 256, 0, 0, -6, 246, 16, 0, -7, \

219, 44, 0, -5, 179, 83, -1, -3, 130, 132, -3, -1, 83, 179, -5, 0, \

44, 219, -7, 0, 16, 246, -6

#define gRDRV_reszFilter7TapHighQuality -1, 19, 108, 112, 19, -1, 0, 0, \

0, 6, 88, 126, 37, -1, 0, 0, 0, 0, 61, 134, 61, 0, 0, 0, 0, -1, 37, \

126, 88, 6, 0, 0

the result size seems alright, just too bright.

perhaps apply appropriate coefficients may solve the problem?

0 Anshuman Saxena over 14 years ago in reply to Sean Tsai

TI__Mastermind 19985 points

Hi,

Generally, we have seen that the set co-efficients are good for normal resize operation. Do you mean that the resizer operation is making your output image look brighter than the input image? Can you please share your input as well as output YUV data?

BTW, just to confirm, is this question for DM6437 or DM36x?

Regards,

Anshuman