CFA co-efficients for Previewer

Mitul Chokshi

Fullscreen 1778.psp_bios_vpfe_st_on_the_fly_sample.h.txt Download

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/** \file   psp_bios_vpfe_st_on_the_fly_sample.h
 *
 *  \brief  Header File
 *
 *  (C) Copyright 2010, Texas Instruments, Inc
 *
 *  \author     Maulik Desai
 *
 *  \version    0.1     Created
 */

/****************************************************************************
  HEADER FILE INCLUSION
 *****************************************************************************/
#include<std.h>

#ifdef __cplusplus
extern "C" {
#endif

/******************************************************************************
  Macros
 ******************************************************************************/

#define R_PHASE \
    0,   0,    0, 0, \
0,   64,   0, 0, \
0,   0,    0, 0, \
0,   0,    0, 0, \
\
0,   16,   0, 0, \
16,   0,   16, 0, \
\
16,   0,   16, 0,  \
0,    0,   0, 0, \
16,   0,   16, 0, \
0,    0,   0, 0, \
\
0,    16,  0, 0,  \
0,    0,   0, 0, \
\
0,   0,    0, 0,  \
0,   64,   0, 0, \
0,   0,    0, 0, \
0,   0,    0, 0, \
\
0,   0,    0, 0, \
32,  0,   32, 0, \
\
16, -26,   16, 0,  \
26, 0,    26, 0, \
16, -26,   16, 0, \
0,  0,    0,  0, \
\
0,  0,    0,  0, \
0,  0,    0,  0, \
\
0,  0,    0,  0,  \
0, 64,    0,  0,  \
0,  0,    0,  0, \
0,  0,    0,  0, \
\
0, 32,    0,  0, \
0,  0,    0,  0, \
\
16, 26,   16, 0, \
-26, 0,  -26, 0, \
16, 26,   16, 0, \
0,   0,    0, 0, \
\
0,  32,    0, 0, \
0,  0,     0, 0

#define GR_PHASE \
    -8,  0,   -8, 0,  \
32, 32,   32, 0, \
-8,  0,   -8, 0, \
0,   0,    0, 0, \
\
0,   0,    0, 0, \
0,  64,    0, 0, \
\
-10, 32,  -10, 0,  \
0,  40,    0, 0, \
-10, 32,  -10, 0, \
0,   0,    0, 0, \
\
0,   0,    0, 0, \
0,   0,    0, 0, \
\
0,   0,    0, 0, \
32,  0,   32, 0, \
0,   0,    0, 0, \
0,   0,    0, 0, \
\
0,   0,    0, 0, \
0,  64,    0, 0, \
\
-13, 32,  -13, 0,  \
0,  52,    0, 0, \
-13, 32,  -13, 0, \
0,   0,    0, 0, \
\
0,   0,    0, 0, \
0,   0,    0, 0, \
\
-16, 0,  -16, 0, \
32, 64,  32, 0, \
-16, 0,  -16, 0, \
0,   0,    0, 0, \
\
0,   0,    0, 0, \
0,  64,    0, 0, \
\
0,  32,    0, 0,  \
0,  0,     0, 0, \
0,  32,    0, 0, \
0,  0,     0, 0, \
\
0,  0,     0, 0, \
0,  0,     0, 0

#define GB_PHASE \
    -8, 32, -8, 0,  \
0,  32,  0, 0, \
-8, 32, -8, 0, \
0,   0,  0, 0, \
\
0,   0,  0, 0, \
0,  64,  0, 0, \
\
-8,  0, -8, 0, \
32, 32, 32, 0, \
-8, 0,  -8, 0, \
0,  0,   0, 0, \
\
0,  0,   0, 0, \
0,  0,   0, 0, \
\
-16, 32,  -16, 0,  \
0,  64,  0,   0, \
-16, 32, -16,  0, \
0,  0,   0,   0, \
\
0,  0,   0,   0, \
0, 64,   0,   0, \
\
0,  0,   0,   0, \
29, 6,  29,   0,  \
0,  0,   0,   0, \
0,  0,   0,   0, \
\
0,  0,   0,   0, \
0,  0,   0,   0, \
\
0, 32,   0,   0,  \
0,  0,   0,   0,  \
0, 32,   0,   0, \
0,  0,   0,   0, \
\
0,  0,   0,   0, \
0, 64,   0,   0, \
\
-13, 0,  -13,  0, \
32, 52, 32,   0, \
-13, 0, -13,   0, \
0,   0, 0,    0,  \
\
0,   0, 0,    0, \
0,   0,  0, 0

#define B_PHASE  \
    16, -6,    16, 0, \
6,  0,     6, 0, \
16, -6,   16, 0, \
0,   0,    0, 0, \
\
0,   16,   0, 0, \
16,   0,  16, 0, \
\
0,    0,   0, 0, \
0,   64,   0, 0,  \
0,    0,   0, 0, \
0,    0,   0, 0, \
\
0,   16,   0, 0, \
0,    0,   0, 0, \
\
16, -32,  16, 0, \
32,   0,  32, 0, \
16, -32,  16, 0, \
0,    0,   0, 0, \
\
0,    0,   0, 0, \
32,   0,  32, 0, \
\
0,    0,   0, 0, \
0,   64,   0, 0,  \
0,    0,   0, 0, \
0,    0,   0, 0, \
\
0,    0,   0, 0, \
0,    0,   0, 0, \
\
16, 26,   16, 0, \
-26, 0,  -26, 0, \
16, 26,   16, 0, \
0,   0,    0, 0, \
\
0,  32,    0, 0, \
0,   0,    0, 0, \
\
0,   0,    0, 0, \
0,  64,    0, 0, \
0,   0,    0, 0, \
0,   0,    0, 0, \
\
0,  32,    0, 0, \
0, 0,  0, 0

#define FRAME_WIDTH     640
#define FRAME_HEIGHT    480

#ifdef __cplusplus
}
#endif

Hello,

I have connected a CMOS sensor to DM6437 VPFE and I'm using Previewer to convert Bayer data to YUV. I can see that image are converted, but color is not converted correctly.

I've enabled CFA interpolation and used CFA coefficients from PSP 1.10.03 sample (psp_bios_vpfe_st_on_the_fly_sample.h: see attached file for reference)

I've disabled RGB to RGB blending module by setting its metrix as Identity Metrix & offset vector to 0s.

For RGB to YCbCr conversion I've kept default settings.

I'm not sure that the CFA coeffs I'm using are correct or not. Please let me know which CFA coeffs shuold I use.

Input Image:

Output image:

Thanks & Regards,

Mitul Chokshi

over 15 years ago

0 Brijesh Jadav80 over 15 years ago

TI__Expert 3925 points

Hi Mitul,

We have used these same CFA coefficients for many input images. I dont think this output image is because of CFA coefficients. Can you see all other parameters are correct? Btw, there is no RGB to RGB blender in previewer.

Thx,

Brijesh Jadav

0 Mitul Chokshi over 15 years ago in reply to Brijesh Jadav80

Intellectual 405 points

Hi Brijesh,

Thanks for the response.

I've kept almost all parameters to default value. Can you provide me any sample bayer image which you have tested with this CFA coefficient? This will help me to locate the parameter where I'm setting incorrect value.

Regarding your second comment for RGB to RGB blending: this module is shown in the VPFE User guide SPRU977A, Figure 28. Please see attached snapshot for reference.

Regards,

Mitul Chokshi

0 Mitul Chokshi over 15 years ago in reply to Brijesh Jadav80

Intellectual 405 points

Brijesh Jadav said:
Can you see all other parameters are correct?

Hi Brijesh,

I checked all other parameters. & as per my understanding they are correct.

Below is the dump. Please check these parameters & see if you can find something.

Address	Register	Value
0x01c70800	PID	0x0002fe00
0x01c70804	PCR	0x04120410
0x01c70808	HORZ_INFO	0x0002027d
0x01c7080c	VERT_INFO	0x000001df
0x01c70810	RSDR_ADDR	0x83096080
0x01c70814	RADR_OFFSET	0x00000280
0x01c70818	DSDR_ADDR	0x00000000
0x01c7081c	DRKF_OFFSET	0x00000000
0x01c70820	WSDR_ADDR	0x800e3480
0x01c70824	WADD_OFFSET	0x00000500
0x01c70828	AVE	0x00000014
0x01c7082c	HMED	0x00000000
0x01c70830	NF	0x00000000
0x01c70834	WB_DGAIN	0x00000100
0x01c70838	WBGAIN	0x20202020
0x01c7083c	WBSEL	0xee44ee44
0x01c70840	CFA	0x00002828
0x01c70844	BLKADJOFF	0x00000000
0x01c70848	RGB_MAT1	0x00000100
0x01c7084c	RGB_MAT2	0x00000000
0x01c70850	RGB_MAT3	0x00000100
0x01c70854	RGB_MAT4	0x00000000
0x01c70858	RGB_MAT5	0x00000100
0x01c7085c	RGB_OFF1	0x00000000
0x01c70860	RGB_OFF2	0x00000000
0x01c70864	CSC0	0x01c2604c
0x01c70868	CSC1	0x080eb3d4
0x01c7086c	CSC2	0x080eb3d4
0x01c70870	CSC_OFFSET	0x00000000
0x01c70874	CNT_BRT	0x00001020
0x01c70878	CSUP	0x00000000
0x01c7087c	SETUP_YC	0xff00ff00
0x01c70880	SET_TBL_ADDRESS	0x00001700
0x01c70884	SET_TBL_DATA	0x00000010

Regards,

Mitul Chokshi

0 Mitul Chokshi over 15 years ago in reply to Brijesh Jadav80

Intellectual 405 points

Hi Brijesh,

The problem is solved now. I had to change phase of CFA coefficient. Earlier I was using Gr-R-B-Gb. I modified it to R-Gr-Gb-B and now color is reproduced correctly.

Thanks for the support.

Regards,

Mitul Chokshi

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CFA co-efficients for Previewer