Many customers ask how they should evaluate cameras to find the best solution for their applications. Among various methods, measuring the Photon Transfer Curve (PTC) stands out as a valuable approach—especially when aiming to maximize your imaging system’s performance, such as detecting subtle differences between images or using pixel data for precise measurements.

We’ve shared detailed guidance on how to measure the PTC for CCD and CMOS machine vision cameras because we believe it plays a critical role in camera evaluation and selection. While camera vendors provide extensive specifications, translating these details into practical insights about image quality under your specific conditions can be challenging. By measuring the PTC yourself using your own equipment and environment (including integration time, illumination conditions, optics, filters, etc.), you gain firsthand validation of performance metrics that are directly relevant to your application.

Beyond Standard Benchmarks

Unlike controlled setups like those defined by EMVA 1288, which provides guidelines for measuring many camera parameters under standardized factory conditions, the PTC can be constructed using your own system and derived data. This approach allows you to uncover behaviors unique to your environment—artifacts or performance characteristics that might not surface during conventional testing.

It’s worth noting that no camera is universally optimal; real-world success depends on tailoring both hardware (electro-optical systems) and algorithms to specific needs. That makes understanding the PTC even more critical: it helps quantify image quality beyond simple metrics like megapixels or frames per second, enabling data-driven decisions for supplier communication, customization requirements, and production consistency checks.

Key Benefits of Measuring the Photon Transfer Curve

Here are three primary reasons why measuring the PTC is essential:

  • Performance Validation: Verify and compare camera performance under conditions relevant to your system.
  • Effective Communication & Customization: Enhance discussions with suppliers or understand requirements for customization.
  • Quality Quantification: Parameterize incoming/outgoing inspections by quantifying image quality metrics.

For more resources on comparing cameras, check out our free ePaper. Additionally, feel free to reach out directly if you’d like support from our local team.

Further Reading

To explore related topics:

Last Updated: 2025-09-04 19:25:28