hi_isp_ae_mode

Description

Defines the AE mode.

Definition

typedef enum {
    HI_ISP_AE_MODE_SLOW_SHUTTER    = 0,
    HI_ISP_AE_MODE_FIX_FRAME_RATE  = 1,
    HI_ISP_AE_MODE_BUTT
} hi_isp_ae_mode;

Members

Restrictions

• The automatic frame rate reduction mode indicates that increasing the exposure time takes priority to reduce the gain value during AE adjustment. When the sensor gain reaches the configured maximum value, the frame rate gradually decreases and the exposure time is prolonged during AE adjustment until the exposure time is equal to the maximum AE time. In low-illuminance scenarios, the noise is small but the frame rate is low.
• In fixed frame rate mode, the frame rate is retained during AE adjustment. In low-illuminance scenarios, the noise is large.
• The built-in WDR mode and multi-frame combination WDR mode support frame rate reduction. For the line-WDR sensor connected by you, cmos.c needs to be modified to support automatic frame rate reduction. For details, see cmos.c of IMX290. In cmos.c, the setting of frame rate reduction in built-in WDR mode should be the same as that in linear mode.