13. A non-transitory computer-readable medium including program instructions which when executed cause a communication apparatus to perform a method, the method comprising: extracting grayscale descriptors of a query image; outputting compressed grayscale descriptors of the query image based on the extracted grayscale descriptors; and distinguishing at least some search results of a search, performed using the compressed grayscale descriptors, of a data base, the distinguishing the at least some search results including at least one of: outputting compressed color descriptors and receiving distinguished search results based on the outputted compressed color descriptors; and receiving the search results to be distinguished and distinguishing the received search results to be distinguished based on color descriptors extracted from the query image, wherein when the search results based on the compressed grayscale descriptors of the query image include plural results, the search results based on the compressed grayscale descriptors of the query image are distinguished based on the extracted color descriptors.
13. A non-transitory computer-readable medium including program instructions which when executed cause a communication apparatus to perform a method, the method comprising: extracting grayscale descriptors of a query image; outputting compressed grayscale descriptors of the query image based on the extracted grayscale descriptors; and distinguishing at least some search results of a search, performed using the compressed grayscale descriptors, of a data base, the distinguishing the at least some search results including at least one of: outputting compressed color descriptors and receiving distinguished search results based on the outputted compressed color descriptors; and receiving the search results to be distinguished and distinguishing the received search results to be distinguished based on color descriptors extracted from the query image, wherein when the search results based on the compressed grayscale descriptors of the query image include plural results, the search results based on the compressed grayscale descriptors of the query image are distinguished based on the extracted color descriptors. 17. The medium of claim 13 wherein when search results of a search of the data base based on compressed grayscale descriptors of the query image are not to be distinguished, color descriptors of the query image are not extracted from the query image.