5017
Kalman filter tracking was used to pinpoint the exact melt pool position , and image segmentation algorithm was developed to segment the melt pool , plume and spatters from each other ; a new tracking method was utilized to remove the spatters generated in the previous frame .
 filter, melt pool, image, algorithm, melt pool
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 filter, melt pool, image, algorithm, melt pool