In the material, which type of cameras has replaced traditional tube cameras?

• A. A surveillance method using thermal imaging
• B. Analog Cameras
• C. IP Cameras
• D. CCD

Answer: (D)

The idea is that imaging technology moved from vacuum-tube cameras to solid-state sensors. Traditional tube cameras used a video tube (like vidicon/plumbicon) to form and read the image, which was bulky, noisy, and less reliable. CCD cameras use a charge-coupled device sensor, a solid-state chip that directly converts light into electronic signals with higher sensitivity and better image quality. This shift also makes cameras smaller, cheaper to maintain, and easier to integrate with digital systems. Thermal imaging is a different modality focused on heat patterns, not a direct replacement of tube video cameras. Analog cameras refer to older formats and can include tube-based types, but they don’t identify the sensor technology that replaced the tubes. IP cameras are the later generation that transmits digitally over a network, often still using CCD or CMOS sensors. So the type of cameras that replaced traditional tube cameras are CCD cameras.