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Considering that stereo matching is the most crucial step for 3-D reconstruction in stereovision sensing , various matching algorithms , i.e .
 concept or principle: step; concept or principle: 3-D; application: sensing; concept or principle: algorithms
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: 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:
 concept or principle: step; concept or principle: 3-D; application: sensing; concept or principle: algorithms