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CSG14K_CSG8K

Functional Description

Datasheet

• PUBLIC

DS000571

• v1-00 • 2020-Dec-15

112

│ 92

To support AWB and/or AEC/AGC algorithms in the camera, the sensor produces a 32-bin histogram

for each color channel of the frame that has been sent out. A total histogram (4 color channels

combined) is also sent out. The histogram data is gathered from pixels in dual exposure group 'L'.

Next to the 32 equally distributed bins, also the number of clipped black and clipped white pixels is

sent out.

Note that due to the dual sided readout, 2 image statistics blocks are sent off-chip: one for the top part

and one for the bottom part of the sensor. All statistical data need to be combined to get the

histograms of the total pixel array.

Image statistics are always transferred over the DATA0_OUT channels, one histogram per row time.

Valid image statistics data are indicated by the SVAL bit on the CTR_OUT channel.

The figure below shows the output sequence of a single histogram on a single channel.

Figure 116:

Timing Histogram Data

Every element of the histogram data is split into two consecutive output words (length set by

OUTP_BITMODE). The LSBs are always placed in the first of these two words of the element. The

various elements are listed in the table below.

Figure 117:

Histogram Elements

Element #

Name

Description

All-1

Start of sequence marker

Histogram ID:

0 = All color channels

1 = Pixels of even rows, even columns

2 = Pixels of even rows, odd columns

3 = Pixels of odd rows, even columns

4 = Pixels of odd rows, odd columns

Bin containing the pixels that are 0

3-34

B0-B31

32 equally sized histogram bins spread over the entire output range

C31

Bin containing the pixels that have the maximum value in the active bit

mode (defined by DPATH_BITMODE)

SVAL

DATA0_OUT

all-1

1 output

word

B31

C31

72 output words

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