Research on Cross-Platform Image Recommendation Model Fusing Text Information

Table 3

Evaluation method of recommendation.

Evaluation dimension	Evaluation method	Advantage	Disadvantage
Objective evaluation	Offline experiment	(i) Users are not required to participate	(i) The results of commercial indexes cannot be obtained
		(ii) Fast speed	(ii) The gap between experimental and commercial indexes
		(iii) Multiple algorithms can be tested
	Online experiment	(i) Attention can be paid to both experimental and commercial indexes	(i) Long time period
		(ii) Multiple algorithms can be tested	(ii) The project is complex
Subjective evaluation	User survey	(i) Many indexes about user’s subjective experience can be obtained directly	(i) The cost of recruiting users is high
		(ii) Suitable for situations that objective indexes cannot be used	(ii) The sample size is relatively small