Inspection Techniques: Dimming and Lens Aperture
About dimming and lens aperture.
We received a question from a customer using the image inspection software EasyInspector, asking, "Can inverter fluorescent lights not be dimmed?" We inform customers using EasyInspector that "if there are no issues with inspections using indoor fluorescent lights or inverter fluorescent lights, there is no need to use expensive lighting." Many LED lights have separate lighting and power units, and since the power unit can be dimmed with a knob, I thought such questions were natural. In fact, there are various methods for adjusting brightness: 1) Dimming 2) Aperture of the lens (in the case of industrial cameras) 3) Camera exposure time and gain settings In other words, in principle, if any of the above three can be adjusted, brightness can be controlled. So, what is the best method to use for adjustment? (Figure 1) This is a photograph of part of a bottle cap. The focus is set on the bottom of the cap. Both images have the same brightness, but you can see that the left image has the focus extending to the edge of the cap compared to the right. This is referred to as "having a deep depth of field."
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In fact, these two images have the same lighting brightness, but on the left, the lens aperture is narrowed, and the camera's exposure time is increased. To compensate for the darkness caused by narrowing the aperture, the exposure time is lengthened to restore the same brightness. When the aperture is narrowed, the "depth of field" becomes deeper, making it easier to focus on both near and distant objects. Considering this, the order for adjusting brightness would be: 1) Fix the lighting at Max 2) Set the exposure time as long as possible (if it's too long, like with camera shake, the image will become blurry) 3) After making it as bright as possible under the above conditions, adjust the brightness by narrowing the "aperture" So, brightness can always be set to Max. Of course, there are inspections that do not fit this example, but as a rough guideline, I think this approach is acceptable.
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"Achieve significant effects" while "keeping costs down." It requires endless effort despite its simplicity. This is why SkyLogic believes it is valuable to continue pursuing "cost-effectiveness" through means such as technology and services. EasyInspector2/DeepSky: An appearance inspection software with a cumulative installation record of 2,500. Effect: We have developed a high-precision and lightweight AI model. It can connect five cameras simultaneously to one PC. Cost: To reduce the cost of learning setup, it is no-code, and simply deciding the inspection mode determines the necessary processing. Expansion and horizontal deployment are possible at low cost. EasyMonitoring2: A system that accurately reads and records meters through cameras and notifies of abnormalities, eliminating time-consuming and costly patrol monitoring. Effect: Not only meter reading but also the confirmation of processing tanks and oil leaks can be automated using AI. Cost: It can connect to inexpensive cameras, up to 100, with one PC. There are no monthly fees. In addition to these, we offer various products for "cost-effectiveness." Please let us know your company's challenges and themes.