5018
After image processing , the features of melt pool intensity , plume area , plume orientation , spatter number , spatter area , spatter orientation and spatter velocity were extracted and their correlations with the scanning quality were investigated .
 image, melt pool, area, orientation, spatter, spatter, area, spatter, orientation, spatter, extracted, scanning quality
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:
 image, melt pool, area, orientation, spatter, spatter, area, spatter, orientation, spatter, extracted, scanning quality