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Introduction
A color image sensor acquires color information from the environment through filters of the three primary colors of light: red (R), green (G), and blue (B). Image signal processing is required to generate vivid color images from these three primary colors, and this processing is performed by an ISP (image signal processor).
Onsemi image sensor types
Color image sensor products are classified into two types.
・ Raw sensor: RGB Output the three primary colors of the image as raw data
・ SoCs sensor: Raw sensor + ISP All-in-one sensor with features
SoC sensors are limited to relatively low-resolution products for automotive products, and other than that, to realize a color camera Raw sensor and outside ISP Must be combined with functionality.
Barriers to realizing ISP functions
There are SoCs and processors equipped with ISP functions, but they require drivers and applications for image sensor control and image restoration, and the difficulty and man-hours of development are obstacles.
The AP1302 is a product of ONSEMI, the same company as the image sensor, and features easy connection and control. An evaluation kit and evaluation software are also available, so if you prepare a PC, you can immediately check the operation.
Preset function and operation check
Various functions and adjustments can be performed by combining registers, and frequently used settings are provided as presets.
You can easily try it with the evaluation software, and you can easily change the settings to make it original.
output resolution
You can freely change the output resolution of your ISP.
[Left: 1080p] [Right: 3264 x 2448]
zoom function
You can set any zoom magnification.
[Left: x1 Zoom ] [Middle: x2 Zoom] [Right: x4 Zoom]
Pan function
The Pan function is realized by changing the output address within the effective pixel range.
[Left: Pan Left] [Center: Center] [Right: Pan Right]
gamma adjustment
Any gamma value can be set.
[Left: Gamma Off] [Middle: Gamma 2.0] [Right: Gamma 4.0]
Compatible with various image sensors
It can be combined with ONSEMI image sensors of various resolutions.
|
model number |
resolution |
optical size |
pixel size |
Frame rate (fps) |
Overview |
|
ARX3A0 |
560 x 560 |
1/10.3 inch |
2.2um BSI |
360 |
Back-illuminated ultra-low power image sensor |
|
AR0144 |
1280 x 800 |
1/4 inch |
3.0um |
60 |
Global shutter image sensor optimized for accurate and fast capture of moving scenes |
|
AR0234 |
1920 x 1200 |
1/2.6 inch |
3.0um |
120 |
Global shutter image sensor optimized for accurate and fast capture of moving scenes |
|
AR0521 |
2592 x 1944 |
1/2.5 inch |
2.2um |
60 |
Image sensor with off-chip HDR support on ISP chip |
|
AR0822 |
3840 x 2160 |
1/1.8 inch |
2.0um BSI |
60 |
eHDR (120dB) back-illuminated rolling shutter |
lastly
By having the ISP function in the AP1302, you can focus on application development and reduce the processing load in the later stages.
The AP1302 can easily realize ISP functions by using it in combination with preset settings prepared in advance and on-semi high-quality image sensors. You get a good quality image.
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