hi_isp_wb_stats

Description

Defines AWB statistics.

Definition

typedef struct { 
    hi_u16 global_r; 
    hi_u16 global_g; 
    hi_u16 global_b;
    hi_u16 count_all;
    hi_u16 zone_avg_r[HI_ISP_AWB_ZONE_NUM];
    hi_u16 zone_avg_g[HI_ISP_AWB_ZONE_NUM];
    hi_u16 zone_avg_b[HI_ISP_AWB_ZONE_NUM]; 
    hi_u16 zone_count_all[HI_ISP_AWB_ZONE_NUM]; 
    hi_isp_awb_grid_info grid_info;
} hi_isp_wb_stats;

Members

Member	Description
global_r	Average value of the R component in global statistics for the Bayer domain. The value range is [0x0, 0xFFFF].
global_g	Average value of the G component in global statistics for the Bayer domain. The value range is [0x0, 0xFFFF].
global_b	Average value of the B component in global statistics for the Bayer domain. The value range is [0x0, 0xFFFF].
count_all	Number of pixels in the gray region of the square in global statistics, which has been normalized. The value range is [0x0, 0xFFFF].
zone_avg_r[HI_ISP_AWB_ZONE_NUM]	Average value of the R component in zoned statistics for the Bayer domain. The value range is [0x0, 0xFFFF]. #define HI_ISP_AWB_ZONE_NUM (HI_ISP_AWB_ZONE_ORIG_ROW * HI_ISP_AWB_ZONE_ORIG_COLUMN)
zone_avg_g[HI_ISP_AWB_ZONE_NUM]	Average value of the G component in zoned statistics for the Bayer domain. The value range is [0x0, 0xFFFF]. #define HI_ISP_AWB_ZONE_NUM (HI_ISP_AWB_ZONE_ORIG_ROW * HI_ISP_AWB_ZONE_ORIG_COLUMN)
zone_avg_b[HI_ISP_AWB_ZONE_NUM]	Average value of the B component in zoned statistics for the Bayer domain. The value range is [0x0, 0xFFFF]. #define HI_ISP_AWB_ZONE_NUM (HI_ISP_AWB_ZONE_ORIG_ROW * HI_ISP_AWB_ZONE_ORIG_COLUMN)
zone_count_all	Number of pixels in the gray region of the square in zoned statistics, which has been normalized. The value range is [0x0, 0xFFFF].
grid_info	Coordinates of the AWB zoned statistics.

Restrictions

**Table 1** AWB zoned statistics (taking zone_avg_r as an example, zone_row = 32, zone_col = 32)
Index	Zone	Bin	Description of Data Read
0	0	0	Average R of block 0
1	1	0	Average R of block 1
2	2	0	Average R of block 2
3	3	0	Average R of block 3
4	4	0	Average R of block 4
...
1023	1023	0	Average R of block 1023

Normalization of zone_count_all helps to eliminate the impact of resolution difference on the number of gray pixels. The normalization formula is as follows:

CountAll = (Count of Gray Pixels << 16)/(Count of All Pixels)

Parent topic: Data Types