hi_isp_ae_strategy

Description

Defines the AE exposure policy mode.

Definition

typedef enum {
    HI_ISP_AE_EXP_HIGHLIGHT_PRIOR = 0,
    HI_ISP_AE_EXP_LOWLIGHT_PRIOR  = 1,
    HI_ISP_AE_STRATEGY_MODE_BUTT
} hi_isp_ae_strategy;

Members

Restrictions

• In linear mode, the default exposure policy is highlight first according to the Ascend AE algorithm, in an attempt to avoid overexposure of images. However, in WDR scenarios, the luminance in dark regions is low. If dark regions need to be concerned, the lowlight first exposure mode can be used, though overexposure occurs in bright regions.
• In WDR mode, the Ascend AE algorithm uses the lowlight first exposure mode by default. Either in lowlight first mode or highlight first mode, long-frame exposure is controlled. In this case, the long-frame exposure time is affected by the exposure time in manual mode, maximum and minimum exposure time, AE_Route, and AE_Route_Ex.