5. The method of claim 4 , further comprising: after identifying the parent station logo template as matching the image based on their similarity scores: extracting a plurality of station logo characteristic sets from the image, wherein each station logo characteristic set corresponds to one child station logo template associated with the identified parent station logo template; calculating a second similarity score between each station logo characteristic set and a corresponding child station logo template; identifying one of the plurality of child station logo templates as matching the image based on their second similarity scores; and returning TV channel information associated with the identified parent and child station logo templates to the mobile terminal.
4. The method of claim 1 , wherein at least one of the plurality of station logo templates further includes a parent station logo template, the parent station logo template further having multiple child station logo templates.