AS0260CSSC28SUD20 datasheet(29/83 Pages) ONSEMI

29 / 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

Gamma Knee Point Calculation

The AS0260 allows for the 19 knee point curves to be programmed based off a small

number of variables. The table below shows the variables which are required.

The diagram below shows the interaction of the variables and cam_ll_inv_brightness_-

metric.

Table 6:

Variables Required for Gamma Knee Point Calculation

Variable

Name

Function

VAR(0x12,0x0168)

or (R0xC968)

cam_ll_llmode

0x00: User will program 19 knee point gamma curves

0x01: AS0260 will calculate 19 knee point for contrast curve (first

curve or table).

0x02: AS0260 will calculate 19 knee point for noise reduction curve

(second curve or table).

0x03:AS0260willcalculateboth19kneepointcurves.

VAR(0x12,0x01C8)

or (R0xC9C8)

cam_ll_start_contrast_bm

Interpolation start point for first curve

VAR(0x12,0x01CA)

or (R0xC9CA)

cam_ll_stop_contrast_bm

Interpolation stop point for second curve

VAR(0x12,0x01CC)

or (R0xC9CC)

cam_ll_gamma

The value of the gamma curve, this is applied to both 19 knee point

curves. The default is 220, this equates to a gamma of 2.2.

VAR(0x12,0x01CE)

or (R0xC9CE)

cam_ll_start_contrast_gradient

The value of the contrast gradient that would be used for the first

curve

VAR(0x12,0x01CF)

or (R0xC93CF)

cam_ll_stop_contrast_gradient

The value of the contrast gradient that would be used for the second

curve

VAR(0x12,0x01D0)

or (R0xC9D0)

cam_ll_start_contrast_luma_percenta

The percentage of target luma for the inflexion point in the first

curve

VAR(0x12,0x01D1)

or (R0xC9D1)

cam_ll_start_contrast_luma_percenta

The percentage of target luma for the inflexion point second curve

VAR(0x12,0x01E2)

or (R0xC9E2)

cam_ll_inv_brightness_metric

Measure of scene brightness, reference points for

cam_ll_start_contrast_bm and cam_ll_stop_contrast_bm

AS0260CSSC28SUD20 数据表(PDF) 29 Page - ON Semiconductor

AS0260CSSC28SUD20 数据表(HTML) 29 Page - ON Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83

数据表下载

链接网址

AS0260CSSC28SUD20 数据表(PDF) 29 Page - ON Semiconductor

AS0260CSSC28SUD20 数据表(HTML) 29 Page - ON Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83

数据表 下载

链接网址

数据表下载