hi_isp_af_cfg

Description

Defines AF statistics configuration parameters.

Definition

typedef struct { 
    hi_bool                  af_en; 
    hi_u16                   zone_col; 
    hi_u16                   zone_row; 
    hi_isp_af_peak_mode      peak_mode; 
    hi_isp_af_squ_mode       squ_mode; 
    hi_isp_af_crop           crop; 
    hi_isp_af_stats_pos      stats_pos; 
    hi_isp_af_raw_cfg        raw_cfg; 
    hi_isp_af_pre_filter_cfg pre_flt_cfg; 
    hi_u16                   high_luma_threshold 
} hi_isp_af_cfg;

Members

Member	Description
af_en	AF enable. The value can be 0 or 1.
zone_col	Number of horizontal AF statistical blocks. The value range is [1, 17].
zone_row	Number of vertical AF statistical blocks. The value range is [1, 15].
peak_mode	Peak mode, determining whether the peak value of the zoned statistics is calculated. Both peak_mode and square_mode affect the zoned statistics. 0: ISP_AF_STA_NORM 1: ISP_AF_STA_PEAK
square_mode	Square mode, determining whether the zoned horizontal and vertical statistics are squared. Both peak_mode and square_mode affect the zoned statistics. 0:ISP_AF_STA_SUM_NORM 1:ISP_AF_STA_SUM_SQU
crop	Cropping configuration of the AF input image.
stats_pos	Position of the AF statistics, which determines whether statistics are collected in the Bayer domain or YUV domain. 0:ISP_AF_STATISTICS_AFTER_DGAIN 1:ISP_AF_STATISTICS_AFTER_DRC 2:ISP_AF_STATISTICS_AFTER_CSC
raw_cfg	Configuration for the AF Bayer domain. raw_cfg is mandatory if the AF module is placed in the Bayer domain.
pre_flt_cfg	Pre-filtering configuration for the AF module, which can remove salt-and-pepper noise noise in the image.
high_luma_threshold	Threshold for the statistics of AF highlight points. The value range is [0, 0xFF].

Restrictions

The zoned statistics are calculated as follows:
- When peak_mode is HI_ISP_AF_STA_NORM and square_mode is HI_ISP_AF_STA_SUM_NORM, the sum of the filter output value of each pixel in zones is the zoned statistics.
- When peak_mode is HI_ISP_AF_STA_NORM and square_mode is HI_ISP_AF_STA_SUM_SQUARE, the sum of squares of the filter output value of each pixel in zones is the zoned statistics.
- When peak_mode is HI_ISP_AF_STA_PEAK and square_mode is HI_ISP_AF_STA_SUM_NORM, the sum of maximum values of filter output values of each pixel in each line in zones is the zoned statistics.
- When peak_mode is HI_ISP_AF_STA_PEAK and square_mode is HI_ISP_AF_STA_SUM_SQUARE, the sum of squares of maximum values of filter output values of each pixel in each line in zones is the zoned statistics.
The zoned luminance statistics (y) are the sum of the luminance of each pixel in zones.
When the ISP BE is in block division mode, the minimum number of horizontal AF statistical windows is the number of blocks specified by BlockNum (For details, see the ISP proc information.). In this case, the value range is [BlockNum, 17].

Parent topic: Data Types