Change Display parameters in iMX6Dual

ahpopat — Mon, 20 Aug 2018 18:21:52 GMT

Hello,

I am using iMX6Dual processor (PCIMX6Q6AVT10AC) and I am trying to change display parameters (like RGB colors) from the default settings to new settings. I changed the parameters in the table but there is no effect. Was wondering what I am doing wrong:

Formula is below:

/* R = (1.164 * (Y - 16)) + (1.596 * (Cr - 128));

G = (1.164 * (Y - 16)) - (0.392 * (Cb - 128)) - (0.813 * (Cr - 128));

B = (1.164 * (Y - 16)) + (2.017 * (Cb - 128); */

original:

ycbcr2rgb_coeff[5][3] =

{

{0x095, 0x000, 0x0CC},

{0x095, 0x3CE, 0x398},

{0x095, 0x0FF, 0x000},

{0x3E42, 0x010A, 0x3DD6}, /*B0,B1,B2 */

{0x1, 0x1, 0x1}, /*S0,S1,S2 */

};

Tried:

ycbcr2rgb_coeff[5][3] =

{

{ 0x092, 0x000, 0x0E1 },

{ 0x095, 0x3E5, 0x3BC },

{ 0x08A, 0x0FA, 0x000 },

{ 0x3E19, 0x0099, 0x3DE8 },

{ 0x001, 0x001, 0x001 },

};

When I do the color measurements using Display color analyzer I see no difference in the measurement data. Would appreciate if someone could suggest a literature document or a method to implement the change.

Thanks in advance for your help.

Re: Change Display parameters in iMX6Dual

igorpadykov — Tue, 21 Aug 2018 04:44:18 GMT

Hi Anup

for colour space conversion example one can look at sect.7.3.15 Video conversion attached Linux Guide.

Demo Image

https://www.nxp.com/webapp/Download?colCode=L4.1.15_2.0.0_MX6QDLSOLO&appType=license&location=null&Parent_nodeId=1337699…

or csc examples on

ipu-examples release notes - v0.1

Best regards
igor
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i.MX ProcessorsのトピックChange Display parameters in iMX6Dual

Change Display parameters in iMX6Dual

Re: Change Display parameters in iMX6Dual