AR0230CS datasheet(15/33 Pages) ONSEMI

15 / 33 page

AR0230CS/D Rev. 9, 6/16 EN

©Semiconductor Components Industries, LLC,2016.

AR0230CS: 1/2.7-Inch 2.1 Mp/Full HD Digital Image Sensor

Features Overview

Table 4:

List of Configurable Registers for Context A and Context B

Motion Compensation/DLO

In typical multi-exposure HDR systems, motion artifacts can be created when objects

move during the T1 or T2 integration time. When this happens, edge artifacts can poten-

tially be visible and might look like a ghosting effect. To correct this, the AR0230CS has

special 2D motion compensation circuitry that detects motion artifacts and corrects the

image. The motion compensation feature can be optionally enabled by register write.

Additional parameters are available to control the extent of motion detection and

correction as per the requirements of the specific application.

Tone Mapping

Real-world scenes often have a very high dynamic range (HDR) that far exceeds the elec-

trical dynamic range of the imager. Dynamic range is defined as the luminance ratio

between the brightest and the darkest objects in a scene. Even though the AR0230CS can

capture full dynamic range images, the images are still limited by the low dynamic range

of display devices. Today's typical LCD monitor has a contrast ratio around 1,000:1 while

it is not atypical for an HDR image having a contrast ratio of around 250,000:1. There-

fore, in order to reproduce HDR images on a low dynamic range display device, the

captured high dynamic range must be compressed to the available range of the display

device. This is commonly called tone mapping. The AR0230CS has implemented an

adaptive local tone mapping (ALTM) feature to reproduce visually appealing images that

increase the local contrast and the visibility of the images.

Context A

Context B

coarse_integration_time

coarse_integration_time_cb

line_length_pck

line_length_pck_cb

frame_length_lines

frame_length_lines_cb

row_bin

row_bin_cb

col_bin

col_bin_cb

fine_gain

fine_gain_cb

coarse_gain

coarse_gain_cb

x_addr_start

x_addr_start_cb

y_addr_start

y_addr_start_cb

x_addr_end

x_addr_end_cb

y_addr_end

y_addr_end_cb

y_odd_inc

y_odd_inc_cb

x_odd_inc

x_odd_inc_cb

green1_gain

green1_gain_cb

blue_gain

blue_gain_cb

red_gain

red_gain_cb

green2_gain

green2_gain_cb

global_gain

global_gain_cb

operation_mode_ctrl

operation_mode_ctrl_cb

bypass_pix_comb

bypass_pix_comb_cb

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