The invention provides a multi-
modal composite coding
image retrieval method and
system, and the method comprises the steps: obtaining to-be-retrieved information, and judging the
data type of the to-be-retrieved information; selecting the coarse-grained retrieval or fine-grained retrieval according to the
data type of the to-be-retrieved information, wherein the fine-grained retrieval comprises the steps that when the input to-be-retrieved information comprises
image description data and text description data at the same time, the two features are fused to obtain composite features, and then
data retrieval is conducted through the composite features. According to the method, coarse-grained retrieval or fine-grained retrieval can be selected according to the
data type, the composite features can be obtained by fusing the two features, and then
data retrieval of fine-grained retrieval is carried out through the composite features; according to the method, the
database construction efficiency can be improved, the flexibility of a retrieval mode is improved, the retrieval difficulty is reduced, and a solution which is uniform in precision and generalization performance and more flexible in switching between fuzzy retrieval and accurate retrieval is provided for
image retrieval.