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图像质量新闻 | 随时掌握图像质量测试与测量技术的最新动态
13 articles found.
Objective measurements are important. Defining the level of performance a camera must actually achieve is equally as important. The ongoing revision of IEC 62676-5 expands the focus from just measurement methods to application-specific performance requirements for professional security cameras.
阅读更多Objective image quality measurements rely on dependable references. Yet while cameras, lighting systems, and test setups are regularly checked, one important factor is often overlooked: the test chart. Reference charts age over time and the aging process can affect the validity of measurement results. You can find the recommended replacement date on the back of your test chart.
阅读更多People rarely sit perfectly still during video conferences. They glance at a second screen, take notes, or briefly turn toward someone else in the room. For webcams, this presents a challenge: they must maintain consistent image quality and respond reliably when a face returns to view. But how can this behavior be measured objectively?
阅读更多Resolution assessment is one of the most important methods for camera characterization. During its analysis, one question often arises: does a resolution measurement remain meaningful when the image is heavily affected by noise? High noise levels make it more difficult to evaluate the actual detail reproduction capabilities of a camera system. A recent study conducted as part of ISO standardization activities demonstrates that the Siemens-star MTF10 value continues to represent the visually perceived resolution limit reliably, even under these conditions.
阅读更多Stray light can significantly affect camera performance, particularly in demanding lighting conditions. To reliably compare and evaluate cameras under such circumstances, reproducible measurement methods are essential. The FLARE System combines controlled illumination, precise positioning, and automated analysis into a standardized workflow for flare characterization.
阅读更多Wide fields of view, specialized lenses, and custom camera designs place growing demands on geometric characterization. With the latest version of the GEOCAL software, version 1.5, we expanded our software’s features with new analysis models, more flexible workflows, and additional automation capabilities that support users in demanding calibration tasks.
阅读更多越来越多的图像处理直接在边缘设备上进行。因此，对智能视觉系统的要求不断增加，对其决策所依据的图像数据的要求也随之提高。 通过加入“边缘人工智能与视觉联盟”（Edge AI and Vision Alliance），我们将自己在图像质量和相机测试方面的专业知识贡献给国际社区。
阅读更多现代车辆不再仅关注周围环境。驾驶员和乘员监测系统（DMS/OMS）会分析车厢内的状况，包括视线方向、驾驶员困倦程度以及乘员的位置和行为。 其中许多系统依赖于不可见的NIR Illumination。为了确保可靠的性能，必须在完全相同的条件下对它们进行测试。
阅读更多Resolution、噪点和动态范围均可进行高精度测量。但变化究竟在何种程度上才会被人类肉眼察觉？图像在何种情况下仍被视为可接受？ 一项最新研究探讨了不同图像质量参数的感知方式，并展示了如何将技术测量结果与人类评估相结合。
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