Automatic fog detection and removal functions | Twice the efficiency | Add onto existing systems |
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The world's first* image correction IC utilizing AIE technology with fog correction function
*November 2009 ROHM study. |
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The BU6521KV fog correction IC utilizes unique AIE technology for clear images with excellent visibility, even in dark or heavily backlit conditions. Images clouded or whitened by fog or rain are corrected in real time, resulting in unsurpassed clarity.
Ideal for security systems requiring high visibility under varying conditions. A TV encoder function is built in that allows real-time image verification via TV.
| Features |
 
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- Image correction functions
- Fog image correction (removal) function
- AIE function capable of backlight correction
- Edge enhancer, gamma ( γ ) correction
- Compatible with
ITU-R BT.656 and YCbCr sync signals
- NTSC/PAL SD-TV composite video (CVBS), 10bit DAC built in
- Control interfaces
- I2C bus (Slave) built in (for register setting)
- Integrated SPI bus (Master) - register set via external EEPROM
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| Package |
| VQFP48C : 9.0mm× 9.0mm× 1.625mm |
| Applications |
| Surveillance cameras, automotive cameras |
Built-in fog detection and correction (removal) functions
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The BU6521KV integrates fog detection and reduction functions.The fog reduction function corrects both the contrast and color of images whitened by fog or rain, restoring images to their natural state. The fog detection function determines the presence of fog or rain based on the whiteness level of the image and continuously makes adjustments accordingly for the clearest images. |
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Dual correction functions: color (AIE) and fog
ROHM's AIE technology performs adaptive correction of images similar to the human eye, unlike conventional systems that make adjustments uniformly to the entire image. Restores the clarity and definition of images exposed to moisture. |
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Upgrade existing sets
BU6521KV supports 8bit YUV=4:2:2 ITU-R BT656 with both horizontal and vertical sync signals, making it possible to add fog correction functionality to existing systems by simply connecting the IC after the camera stage.
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Electrical Characteristics
| Part No. |
Power Supply
Voltage (V) |
Compatible Image
Size |
Input
Interface |
Control
Interface
|
Output
Interface |
Fog Image
Correction |
Video
Out |
Operating
Temp. Range (ºC) |
Package |
| BU6521KV |
1.4 to 1.6
(VDD Core)
2.7 to 3.6
(VDD l/O,AVDD) |
720 × 480
SD size |
8bit
YUV=4:2:2
ITU-R BT.656 |
I2C
Serial EEPROM
interface |
8bit
YUV=4:2:2
ITU-R BT.656 |
Yes |
Yes |
-40 to +85 |
VQFP48C |
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