Documentation

hi_isp_frame_info

Description

Defines the real-time ISP information.

Prototype

typedef struct {
    hi_u32      iso;
    hi_u32      exposure_time;
    hi_u32      isp_dgain;
    hi_u32      again;
    hi_u32      dgain;
    hi_u32      ratio[3];
    hi_u32      isp_nr_strength;
    hi_u32      f_number;
    hi_u32      sensor_id;
    hi_u32      sensor_mode;
    hi_u32      hmax_times;
    hi_u32      vmax;
    hi_u32      vc_num;
    hi_u64      fsync_timestamp;
    hi_u64      fs_timestamp;
    hi_u64      fe_timestamp;
    hi_u64      pe_timestamp;
    hi_s64      motion_filter[9];
    hi_u32      reserved[10];
} hi_isp_frame_info;

Members

Member

Description

iso

Current sensor analog gain x Sensor digital gain x ISP digital gain x 100. Used only for PQ tuning.

exposure_time

Exposure time (in μs). Used only for PQ tuning.

isp_dgain

ISP digital gain. Used only for PQ tuning.

again

Sensor analog gain. Used only for PQ tuning.

dgain

Sensor digital gain. Used only for PQ tuning.

ratio

Default exposure ratio of two adjacent frames in multi-frame combination WDR mode. Used only for PQ tuning.

isp_nr_strength

NR strength of the ISP. This parameter is not supported currently. The default value is 0.

f_number

F-number of the current lens. Used only for PQ tuning.

sensor_id

Sensor ID. Used only for PQ tuning.

sensor_mode

Sensor sequence mode. Used only for PQ tuning.

hmax_times

Time it takes for the current sensor to read a line (in ns). Used only for PQ tuning.

vmax

Total number of lines that take effect in each frame for the sensor. The unit is line. Used only for PQ tuning.

vc_num

This parameter is not supported currently. The default value is 0. This parameter is not supported currently. The default value is 0.

fsync_timestamp

Time when the fsync exposure synchronization signal is sent.

fs_timestamp

Time when the FrameStart signal of the sensor module is received. The time is for reference only and may be inaccurate due to the CPU load and scheduling.

fe_timestamp

Time when the FrameEnd signal of the sensor module is received. The time is for reference only and may be inaccurate due to the CPU load and scheduling.

pe_timestamp

Time for outputting images after ISP processing. It is used only as a reference for maintenance and test.

motion_filter

3 x 3 affine transformation matrix of DIS, in 15-bit decimal precision. The value is automatically generated after DIS is enabled.

Users cannot directly use this matrix as the affine transformation matrix. To obtain the affine transformation matrix, perform the following steps:

(1) Convert data in the matrix to floating-point data for normalization.

(2) Find matrix m2, which is the inverse matrix of matrix m1. Matrix m2 can be directly operated on images.

(3) Multiply the input image and matrix m2 to obtain the corrected image.

reserved

Reserved. The default value is 0.