AS0260CSSC28SUD20 datasheet(34/83 Pages) ONSEMI

34 / 83 page

AS0260 DS Rev. G Pub. 5/15 EN

©Semiconductor Components Industries, LLC, 2015.

AS0260: 1/6-Inch 1080P High-Definition (HD) System-On-A-Chip (SOC) Digi-

tal Image Sensor

Vertical Perspective Correction

The AS0260 has vertical perspective correction (VPC), this allows the user to correct

(within limits) for an off-horizontal axis camera.

VPC is performed using a mixture of scale and crop, the variables which control this are:

The effect of using cam_scale_vertical_tc_percentage can be seen below.

Table 10:

Variables Controlling VPC

Variable

Name

Function

VAR(0x12,0x005E) or

(R0xC85E)

cam_scale_vertical_tc_mode

When bit 0 is set will depend if the cropping is done through the

center or top or bottom

VAR(0x12,0x0060) or

(R0xC860)

cam_scale_vertical_tc_percentage

The amount of tilt (perspective) correction to be applied. If

negative, this value represents% of FOV reduction with the bottom

line unaffected. If positive, this value represents% of FOV

reduction with the top line unaffected

VAR(0x12,0x0062) or

(R0xC862)

cam_scale_vertical_tc_stretch_factor Ratio of vertical stretching against the percentage applied. Vertical

stretching = stretch factor x percentage/2

Original Image

VPC Corrected Image

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