Can machine vision inspection systems completely replace manual visual inspection?

As the machine vision industry becomes increasingly familiar to people, more and more companies are considering using machine vision products to replace manual inspection. However, can machine vision inspection systems completely replace manual visual inspection? What are the applicable areas? What are the limitations of machine vision inspection?

Machine Vision Requires Financial Investment

Currently, small and medium-sized enterprises have limited profit margins, and upgrading to automation requires a reserve of capital and talent. Due to various constraints, many companies are hesitant to invest heavily, which is why machine vision inspection is generally found only in large enterprises with strong resources. Manual labor is the largest cost for these companies, creating financial pressures. Unless it is absolutely necessary, they tend to continue with their existing processes.

Limitations of Machine Vision Inspection

1. Detection Specificity: In visual inspection applications, there are usually specific defect patterns that the machine vision system is designed to detect. However, it may fail to identify defects that are new or occur in diverse ways. Human inspectors, on the other hand, might notice these unusual defects even if they're not explicitly trained to look for them, reducing the risk of quality issues.

2. Lighting Challenges: Proper lighting is critical in machine vision. If the captured images are difficult to interpret visually, creating an algorithm to identify defects can be challenging. Conversely, if the lighting is set up well, emphasizing the features to be inspected, the algorithm implementation becomes easier.

Prospects for Machine Vision Inspection

Machine vision inspection is expected to have a substantial market because it addresses a significant problem in manual inspection: inconsistency. Human inspectors, no matter how robust the reward and punishment systems are, can make mistakes due to fatigue or negligence. Machine vision systems, on the other hand, operate with precision and do not get tired or distracted.

Comparing Machine Vision and Manual Visual Inspection

In terms of quality control, factory quality assurance departments prefer machine vision because it provides consistency, even if it might miss unique defects. For a factory, the most critical aspect is "control." While isolated, unexpected defects might be overlooked, the system must consistently identify commonly occurring defects.

Machine Vision Inspection Cost

From a cost perspective, machine vision is more affordable in the mid to long term. Typically, a factory employs Quality Control (QC) personnel, with the annual salary cost for four inspectors exceeding 200,000 RMB. This is approximately the cost of a machine vision system, indicating that the investment in automation can be worthwhile. Overall, machine vision inspection systems cannot completely replace manual inspection in the short term due to limited intelligence and lack of willingness to invest among smaller enterprises. However, for quality control, machine vision inspection is more reliable than manual inspection.