Apparatus and method for data embedding in light communication and the light communication system and method thereof

A method for data embedding in light communication, adapted to a transmitter, said method comprising:

• arranging a data embedding unit between a transmitter-side communication data processing unit and a light emitting device driver in the transmitter;
• embedding, by using the data embedding unit, a communication processed data at a spatial domain of an image according to a modulation scheme to generate a communication modulated image by embedding the communication processed data at one or more frequency coefficients in a frequency domain of the image;
• and
• performing an inverse transform and a domain transform that transforms the communication modulated image from the frequency domain into the spatial domain in order to generate a communication data embedded image, and getting multiple RGB values for the communication data embedded image.

A method for data embedding in light communication, adapted to a transmitter, said method comprising:

• arranging a data embedding unit between a transmitter-side communication data processing unit and a light emitting device driver in the transmitter;
• embedding, by using the data embedding unit, a communication processed data at a spatial domain of an image according to a modulation scheme to generate a communication modulated image;
• and
• performing an inverse transform and a domain transform that transforms the communication modulated image from a frequency domain into the spatial domain, and getting multiple RGB values for a communication data embedded image;
• wherein said method further transfers a plurality of pixel arrays of the image from a first spatial domain to a second spatial domain before embedding the communication processed data according to an external indicator.

A method for data embedding in light communication, adapted to a transmitter, said method comprising:

• arranging a data embedding unit between a transmitter-side communication data processing unit and a light emitting device driver in the transmitter;
• embedding, by using the data embedding unit, a communication processed data at a spatial domain of an image according to a modulation scheme to generate a communication modulated image;
• and
• performing an inverse transform and a domain transform that transforms the communication modulated image from the frequency domain into the spatial domain, and getting multiple RGB values for a communication data embedded image;
• wherein said method embeds the communication processed data by inserting one or more frames modulated by one or more image intensities inter a plurality of frames over the image.

A receiving apparatus for data embedding in light communication, comprising:

• an image sensing device that detects a transmitter-side communication data embedded image transmitted by a light emitting device, and generates a receiver-side communication data embedded image;
• an image warping unit that compensates a deformation of the receiver-side communication data embedded image by performing an image warping processing to perform a coordinate conversion on a plurality of pixel data in an area of the transmitter-side communication data embedded image, and outputs a warped communication data embedded image;
• and
• a data extraction unit that extracts a communication processed data from the warped communication data embedded image.

A receiving method for data embedding in light communication, comprising:

• configuring an image warping unit and a data extraction unit between an image sensing device and a receiver-side communication data processing unit;
• detecting a transmitter-side communication data embedded image transmitted by a light emitting device and generating a receiver-side communication data embedded image, by using the image sensing device;
• performing an image warping processing to perform a coordinate conversion on a plurality of pixel data in an area of the transmitter-side communication data embedded image and outputting a warped communication data embedded image, by using the image warping unit;
• and
• extracting a communication processed data from the warped communication data embedded image, by using the data extraction unit.