hi_isp_fswdr_mode
Description
Defines the ISP FSWDR running mode.
Definition
typedef enum {
HI_ISP_FSWDR_NORMAL_MODE = 0x0,
HI_ISP_FSWDR_LONG_FRAME_MODE = 0x1,
HI_ISP_FSWDR_AUTO_LONG_FRAME_MODE = 0x2,
HI_ISP_FSWDR_MODE_BUTT
} hi_isp_fswdr_mode;
Members
Member |
Description |
|---|---|
HI_ISP_FSWDR_NORMAL_MODE |
Normal FSWDR mode. In this mode, the AE and combination module work based on the automatic or manual exposure ratio. |
HI_ISP_FSWDR_LONG_FRAME_M ODE |
Long frame mode. In this mode, the AE sets the exposure time of short frames to the minimum value and that of long frames close to the maximum value allowed by a frame. In this case, the combination module outputs only the long frame data. This member can be used to optimize the image quality in the weak WDR scenario or low illuminance scenario. |
HI_ISP_FSWDR_AUTO_LONG_FRA ME_MODE |
Automatic long frame mode. In this mode, the automatic exposure time of short frames does not exceed the maximum exposure time of short frames that are limited by the sensor in long frame mode. When the exposure exceeds the threshold set by the sensor, the long frame mode is automatically switched, and the combination mode outputs only the long frame data. |
Restrictions
- The long frame mode is valid only in line-based WDR mode prioritized long frames. The automatic long frame mode is valid only in 2-to-1 line-based WDR mode prioritized long frames. To ensure the image quality, the motion detection and long/short frame blending thresholds of the WDR module are automatically configured and cannot be manually configured. If the mode is switched online to WDR, the normal FSWDR mode takes effect by default.
- In automatic long frame mode, the manual exposure ratio takes effect. If the manual exposure ratio is greater than 1, the long frame mode is not enabled even if the exposure value is greater than the configured threshold. If the manual exposure ratio is 1, the long frame mode is automatically used.
- If the fusion mode is enabled for the WDR module in long frame mode, the bright region may have a pink cast or become gray. Therefore, it is not recommended that the long frame mode and the fusion mode of the WDR module be enabled at the same time.
- The long frame mode and automatic long frame mode can be used only when the preferred frame is the long frame and the separate gain configuration is disabled.
See Also
None