hi_isp_af_h_param

Description

Defines the IIR parameter configuration of the horizontal filter for AF statistics.

Definition

typedef struct { 
    hi_bool          narrow_band_en; 
    hi_bool          iir_en[HI_ISP_IIR_EN_NUM]; 
    hi_u8            iir_shift; 
    hi_s16           iir_gain[HI_ISP_IIR_GAIN_NUM]; 
    hi_u16           iir_shift_lut[HI_ISP_IIR_SHIFT_NUM]; 
    hi_isp_af_level_depend  level_depend; 
    hi_isp_af_coring        coring;
} hi_isp_af_h_param;

Members

Member	Description
narrow_band_en	Narrow bandwidth enable for the IIR filter
iir_en	Cascaded IIR enable
iir_shift	Overall shift of the IIR filter. The value range is [0, 63].
iir_gain	IIR filter coefficient, for controlling the frequency response of the IIR filter. Value range: Gain0: [0, 255]; others: [-511, 511].
iir_shift_lut	IIR filter shift adjustment. The value range is [0, 0x7].
level_depend	Configuration of the LDG module of the IIR filter.
coring	Configuration of the coring module of the IIR filter.

Restrictions

iir_gain[0] is an 8-bit unsigned number. iir_gain[1] to iir_gain [6] are signed 10-bit numbers and cannot be −512. iir_en, narrow_band_en, iir_gain, and iir_shift can be generated by using the PQ Tools. You can adjust the LDG and coring modules as required to obtain the optimal FV statistics output.

Parent topic: Data Types