Many people believe that better image clarity is always associated with increased resolution when choosing a camera module. Higher resolution does not, however, always result in improved low-light performance in actual embedded vision projects. In dimly lit areas, a 2MP camera module frequently performs better than an 8MP module.
The explanation is straightforward: smaller pixels are typically associated with higher resolution. Less light is captured by smaller pixels, which lowers light sensitivity and raises image noise.
Why Does Higher Resolution Reduce Low-Light Performance?
Increasing megapixels results in smaller individual pixels within the same sensor size.
Larger pixels are typically seen in 2MP sensors.
Denser pixel patterns are necessary for 8MP sensors.
Fewer photons are received by smaller pixels.
High-resolution camera modules are therefore more likely to encounter:
Motion blur and image noise
Loss of specificity
Poor clarity of images in dim light
Why Are 2MP Camera Modules Still Popular?
In applications like:
cameras for security
Vision for industry
Vehicle systems
Stable image quality is frequently more crucial for AI recognition than high resolution.
For this reason, a lot of engineers still favor:
Greater pixel size
Low-light sensors from STARVIS
Larger sensor formats
Increased dynamic range
How to Choose the Correct Camera Module
1. It's Not All About Megapixels
Additionally, real image clarity depends on:
Size of Pixels
Aperture of the Lens
Dimensions of the Sensor
ISP adjustment
Conditions of lighting
2. Align Resolution with the Application
For low-light scenarios like:
Surveillance at night
Scanning barcodes
AI identification
Larger pixels are frequently more crucial for industrial inspection than extremely high resolution.
How the Sector Enhances Low-Light, High-Resolution Performance
Bigger sensors
Quad Bayer technology
High-tech ISP noise reduction
Enhanced light transmission through the lens
These technologies aid in striking a balance between light sensitivity and visual detail.
You can explore different camera module products for embedded vision applications.
You may also check our low light camera module solutions for more reference.
