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CSG14K_CSG8K

Functional Description

Datasheet

• PUBLIC

DS000571

• v2-01 • 2023-Feb-10

113

│ 74

Dual Exposure HDR

Figure 88:

HDR Registers

Reg. Name

Bank

Addr

Bits

Description

DUAL_EXPOSURE

[0]

0: Dual Exposure off

1: Dual exposure on

DUAL_EXP_GROUPING

[0]

0: Default grouping (mono)

1: Paired grouping (color)

EXP_TIME_L

14-15

[15:0]

Exposure Time of group L

EXP_TIME_S

16-17

[15:0]

Exposure Time of group S

In dual exposure mode, one image can have 2 different exposure times, divided in 2 row

groups. In the camera system, this image can be translated into an HDR image containing

both details in dark and bright areas.

In the effective pixel array, the pixels are split into two exposure groups. When

DUAL_EXP_GROUPING is set low:

●

Exposure group S: All pixels of rows 0+4i and 2+4i

●

Exposure group L: All pixels of rows 1+4i and 3+4i

When DUAL_EXP_GROUPING is set high, the exposure groups use adjacent row pairs:

●

Exposure group S: All pixels of rows 0+4i and 1+4i

●

Exposure group L: All pixels of rows 2+4i and 3+4i

The latter should be used in color mode, keeping the Bayer pattern complete. Figure 89

shows how the rows of the pixel array are divided into two exposure groups.

Figure 89:

Dual Exposure Grouping

When DUAL_EXPOSURE is set low, the exposure time of all pixels is set with EXP_TIME_L.

When the register is set high, the exposure time of the two groups can be set independently

with EXP_TIME_S and EXP_TIME_L.

Row 0

Row 1

Row 2

Row 3

Row 0

Row 1

Row 2

Row 3

DUAL_EXP_GROUPING = 0

DUAL_EXP_GROUPING = 1

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