Systems and methods for processing input streams of calendar applications

A system comprising:

• a memory;
• an image capturing device provided by one of:
• a still image camera or a video camera;
• and
• a processor coupled to the memory and to the image capturing device, the processor configured to:
• receive, by the image capturing device, an input image;
• process the input image to produce a first sequence of characters of a natural language;
• responsive to determining that the first sequence of characters comprises no time references, store, in a first data structure of a first type, a memorandum comprising at least part of the first sequence of characters;
• receive a user input modifying the memorandum;
• process the user input to produce a second sequence of characters;
• responsive to determining that the second sequence of characters comprises a time reference, convert the memorandum stored in the first data structure of the first type into a calendar entry stored in a second data structure of a second type;
• store, in the second data structure of the second type, an identifier of a time referenced by the time reference;
• store, in the second data structure, an identifier of an event and an identifier of a location of the event;
• parse the second sequence of characters to produce a data item representing a type identifier of the calendar entry, wherein the type identifier is provided by one of:
• an appointment, a meeting request, or a reminder;
• and
• render at least part of the first data structure and at least part of the second data structure in a mixed view showing calendar entries and memorandums.

A computer-readable non-transitory storage medium comprising executable instructions that, when executed by a computer system, cause the computer system to:

• receive, by an image capturing device of the computer system, an input image, wherein the image capturing device is provided by one of:
• a still image camera or a video camera;
• process the input image to produce a first sequence of characters of a natural language;
• responsive to determining that the first sequence of characters comprises no time references, store, in a first data structure of a first type, a memorandum comprising at least part of the first sequence of characters;
• receive a user input modifying the memorandum;
• process the user input to produce a second sequence of characters;
• responsive to determining that the sequence of characters comprises an imprecise relative time reference, convert the memorandum stored in the first data structure of the first type into a calendar entry stored in a second data structure of a second type;
• convert, by applying one or more pre-defined conversion rules, the imprecise relative time reference into an absolute time reference;
• store, in a second data structure of a second type, the calendar entry comprising an identifier of a time referenced by the absolute time reference;
• store, in the second data structure, an identifier of an event and an identifier of a location of the event;
• parse the second sequence of characters to produce a data item representing a type identifier of the calendar entry, wherein the type identifier is provided by one of:
• an appointment, a meeting request, or a reminder;
• and
• render at least part of the first data structure and at least part of the second data structure in a mixed view showing calendar entries and memorandums.