Camera Integration (MediaTek Imgsensor)
In this section, we will demonstrate how to integrate a new sensor into Genio 510/700-EVK.
Sensor Porting
The user who wants to use other sensors will need to integrate the sensor driver into MediaTek Imgsensor. For more details, please refer to the sensor porting guide on MediaTek On-Line:
Sensor Type |
Document Path |
|---|---|
RAW |
IoT/Software/Genio Series SoC/Genio 700/IoT Yocto/Camera/MTK_MT8390_IoT_Yocto_RAW_Image_Sensor_Driver_Development_Guide_v1.4.docx |
YUV |
IoT/Software/Genio Series SoC/Genio 700/IoT Yocto/Camera/MTK_MT8390_IoT_Yocto_YUV_Image_Sensor_Driver_Development_Guide_v1.0.docx |
Calibration and Tuning
Camera Calibration
In camera sensor calibration, several parameters are calibrated to ensure optimal image quality and accurate performance. Here is an overview of the key calibration items that the MediaTek calibration tool supports:
- Optical Black (OB) Calibration
The optical black level is subtracted from the image data to remove the dark current and produce a corrected image with better image quality.
- Auto White Balance (AWB) Calibration
This process corrects color temperature variations in different lighting conditions. It involves adjusting the camera’s white balance settings to accurately reproduce colors under various lighting sources.
- Auto Exposure (AE) Calibration
AE calibration determines the camera’s exposure settings to achieve accurate exposure levels in different lighting conditions. Through algorithms and analysis, the calibration determines the appropriate exposure time, Gain, ISO sensitivity, and other parameters to capture well-exposed images while maintaining details in high-contrast scenes.
- Lens Shading Calibration
Shading refers to variations in brightness or color across the image sensor due to factors like lens vignetting or uneven illumination. Shading correction involves estimating the shading pattern across the sensor and applying corrections to ensure uniform brightness and color reproduction throughout the image.
We offer the MediaToolKit to assist with camera calibration (Require NDA). For detailed information on how to use the MediaToolKit, please refer to the user documentation available on MediaTek On-Line document path: IoT/Software/Genio Series SoC/Genio 700/IoT Yocto/Camera/Camera Tuning Tool/MediaToolKit/
Camera Tuning
Camera tuning will primarily involve adjusting the relevant parameters of the ISP (Image Signal Processor) module and aims to reproduce the captured image to closely resemble what is perceived by the human eye. This involves enhancing various visual aspects such as saturation, sharpness, de-noise, and even stylization if desired.
Within the realm of camera tuning, we offer the ImagiqSimulator to provide the following features:
- Parameter Adjustment
It allows for the manipulation and adjustment of various ISP parameters to fine-tune the image processing pipeline.
- Image Comparison
It enables users to compare the original image with the processed image to evaluate the effectiveness of parameter adjustments.
- Parameter Import/Export
It provides parameters DB tool to allow for the importation/exportation of tuned parameter sets, which can be extracted/applied directly on target devices or integrated into the codebase.
- Batch Processing
It supports batch processing, enabling users to apply the same set of parameter adjustments to multiple images automatically.
To obtain more detailed information about the ImagiqSimulator (Require NDA), please refer to the user documentation available on MediaTek On-Line document path: IoT/Software/Genio Series SoC/Genio 700/IoT Yocto/Camera/Camera Tuning Tool/ImagiqSimulator5/