1. A tomographic image processing method, comprising the steps of:
emitting a light beam within a predetermined wavelength band;
dividing the emitted light beam in to a measuring light beam and a reference light beam;
combining reflected light beams, which are the measuring light beam reflected at various depth positions within a measurement target, with the reference light beam;
detecting interference light beams, formed by combining the reflected light beams and the reference light beam, as interference signals; and
generating a tomographic image from the interference signals; wherein:
the detected interference signals are divided into different wavelength bands, to generate a plurality of divided interference signals;
each of the plurality of divided interference signals is analyzed to obtain a plurality of pieces of tomographic data regarding each depth position of the measurement target, as intermediate tomographic data;
tomographic data are obtained employing the plurality of pieces of intermediate tomographic data; and
the tomographic image of the measurement target is generated employing the obtained tomographic data.
2. A tomographic image processing apparatus that emits a light beam within a predetermined wavelength band; divides the emitted light beam in to a measuring light beam and a reference light beam; combines reflected light beams, which are the measuring light beam reflected at various depth positions within a measurement target, with the reference light beam; detects interference light beams, formed by combining the reflected light beams and the reference light beam, as interference signals; and generates tomographic images from the interference signals; comprising:
interference signal dividing means, for dividing the detected interference signals into different wavelength bands, to generate a plurality of divided interference signals;
interference signal analyzing means, for analyzing each of the plurality of divided interference signals to obtain a plurality of pieces of tomographic data regarding each depth position of the measurement target, as intermediate tomographic data;
tomographic data obtaining means, for obtaining tomographic data employing the plurality of pieces of intermediate tomographic data; and
tomographic image generating means, for generating the tomographic images of the measurement target employing the obtained tomographic data.
3. A tomographic image processing apparatus as defined in claim 2, wherein:
the interference signal dividing means divides the interference signals such that the bandwidths of the divided interference signals are substantially uniform.
4. A tomographic image processing apparatus as defined in claim 2, wherein:
the interference signal dividing means divides the interference signals such that the wavelength bands of the divided interference signals overlap with each other.
5. A tomographic image processing apparatus as defined in claim 2, wherein:
the tomographic data obtaining means obtains the tomographic data by: calculating an average value of the plurality of intermediate tomographic data.
6. A tomographic image processing apparatus as defined in claim 2, wherein:
the tomographic data obtaining means obtains the tomographic data by: calculating an average value of the plurality of intermediate tomographic data; excluding the intermediate tomographic data having the furthest value from the average value; and recalculating an average value of the remaining intermediate tomographic data.
7. A tomographic image processing apparatus as defined in claim 2, wherein:
the tomographic data obtaining means obtains the tomographic data by: calculating an average value of the plurality of intermediate tomographic data; and weighting each piece of the intermediate tomographic data such that the weighting is greater the closer the value of the intermediate tomographic data is to the average value.
8. A tomographic image processing apparatus as defined in claim 2, wherein:
the tomographic data obtaining means obtains the tomographic data by: calculating an average value and a variance of the plurality of intermediate tomographic data; extracting intermediate tomographic data having a difference from the average value smaller than the variance; and employing the extracted tomographic data.
9. A tomographic image processing apparatus as defined in claim 2, further comprising:
interference signal converting means, for converting the interference signals or the divided interference signals so as to correspond to changes in wave numbers, when the wavelength of the light beam is swept.
10. A tomographic image processing apparatus as defined in claim 2, wherein:
the light beam is emitted while the wavelength thereof is periodically swept within the predetermined wavelength band; and
the interference signal dividing means generates the plurality of divided interference signals, by dividing the interference signals, which are detected during a single period of the wavelength of the light beam being swept, into the divided interference signals for each of a plurality of different wavelength bands.
11. A tomographic image processing apparatus as defined in claim 2, wherein:
the light beam is periodically emitted as a low coherence light beam having the predetermined wavelength band; and
the interference signal dividing means generates the plurality of divided interference signals, by dividing the interference signals, which are detected during a single period of the light beam being emitted, into the divided interference signals for each of a plurality of different wavelength bands.
12. A computer readable medium, having recorded therein a tomographic image processing program, the program causing a computer to execute the procedures of:
emitting a light beam within a predetermined wavelength band;
dividing the emitted light beam in to a measuring light beam and a reference light beam;
combining reflected light beams, which are the measuring light beam reflected at various depth positions within a measurement target, with the reference light beam;
detecting interference light beams, formed by combining the reflected light beams and the reference light beam, as interference signals; and
generating a tomographic image from the interference signals; wherein:
the detected interference signals are divided into different wavelength bands, to generate a plurality of divided interference signals;
each of the plurality of divided interference signals is analyzed to obtain a plurality of pieces of tomographic data regarding each depth position of the measurement target, as intermediate tomographic data;
tomographic data are obtained employing the plurality of pieces of intermediate tomographic data; and
the tomographic image of the measurement target is generated employing the obtained tomographic data.
13. An optical tomography system, comprising:
a light source unit, for emitting a light beam within a predetermined wavelength band;
light dividing means, for dividing the emitted light beam in to a measuring light beam and a reference light beam;
combining means, for combining reflected light beams, which are the measuring light beam reflected at various depth positions within a measurement target, with the reference light beam;
interference light detecting means, for detecting interference light beams, formed by combining the reflected light beams and the reference light beam, as interference signals; and
tomographic data processing means, for generating a tomographic image from the interference signals; wherein the tomographic data processing means comprises:
interference signal dividing means, for dividing the detected interference signals into different wavelength bands, to generate a plurality of divided interference signals;
interference signal analyzing means, for analyzing each of the plurality of divided interference signals to obtain a plurality of pieces of tomographic data regarding each depth position of the measurement target, as intermediate tomographic data;
tomographic data obtaining means, for obtaining tomographic data employing the plurality of pieces of intermediate tomographic data; and
tomographic image generating means, for generating the tomographic images of the measurement target employing the obtained tomographic data.
14. An optical tomography system as defined in claim 13, wherein:
the light source unit emits the light beam while sweeping the wavelength thereof within the predetermined wavelength band; and
the interference signal dividing means generates the plurality of divided interference signals, by dividing the interference signals, which are detected during a single period of the wavelength of the light beam being swept, into the divided interference signals for each of a plurality of different wavelength bands.
15. An optical tomography system as defined in claim 13, wherein:
the light source unit emits the light beam periodically emitted as a low coherence light beam having the predetermined wavelength band; and
the interference signal dividing means generates the plurality of divided interference signals, by dividing the interference signals, which are detected during a single period of the light beam being emitted, into the divided interference signals for each of a plurality of different wavelength bands.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A computer readable medium storing a program executable by a voice communication server to perform a method for a voice communication process between a telephone connected to a line switching network employing a telephone number scheme and a plurality of communication devices connected to a packet switching network employing a communication address scheme which is different from the telephone number scheme, the method comprising the steps of:
receiving a call setting request from the telephone, the call setting request including a telephone number according to the telephone number scheme for identifying one of the communication devices as a communication partner;
transmitting a call setting response in response to the call setting request;
obtaining a communication address of the communication device according to the communication address scheme identified by the telephone number in the call setting request;
transmitting a voice communication request packet, whose destination is the obtained communication address, to the packet switching network for requesting the communication device to communicate with the telephone;
receiving a voice communication response packet in response to the voice communication request packet from the communication device to which the obtained communication address is assigned; and
performing the voice communication process between the telephone and the communication device when the voice communication response packet indicates an accepting response,
wherein the voice communication request packet includes the communication address, according to the communication address scheme, which identifies the voice communication server in the packet switching network and the communication address, according to the communication address scheme, which identifies the communication device in the packet switching network.
2. The computer readable medium according to claim 1, wherein the method further comprise the steps of:
providing a correspondence table for relating the number identifying the communication device according to the telephone number scheme with the communication address of the communication device according to the communication address scheme; and
in the communication address obtaining step, obtaining the communication address according to the communication address scheme based on the correspondence table.
3. The computer readable medium according to claim 1,
wherein the packet switching network is a LAN (Local Area Network).
4. The computer readable medium according to claim 1, wherein the method further includes the steps of:
performing, when the voice communication response packet indicates the accepting response, the voice communication process between the telephone and the communication device that transmitted the accepting responses;
wherein the voice communication process performing step includes the sub-steps of:
converting received voice information to a voice packet and converting a received voice packet to voice information;
transmitting the converted voice packet to the communication device; and
transmitting the converted voice information to the telephone.
5. The computer readable medium according to claim 4,
wherein the packet switching network is a TCPIP network and the voice communication request packet transmitting step and the voice communication response packet receiving step use TCPIP.
6. The computer readable medium according to claim 4,
wherein the packet switching network is a UDPIP network and the voice communication request packet transmitting step and the voice communication response packet receiving step use UDPIP.
7. The computer readable medium according to claim 4,
wherein the packet switching network is a TCPIP network and the voice packet transmitting step and the voice packet receiving step use TCPIP.
8. The computer readable medium according to claim 4,
wherein the packet switching network is a UDPIP network and the voice packet transmitting step and the voice packet receiving step use UDPIP.
9. The computer readable medium according to claim 4,
wherein the method further includes the steps of:
transmitting the voice communication request packet using TCP; and
transmitting the voice packet using UDP.
10. The computer readable medium according to claim 4, wherein the method further includes the step of:
transmitting guidance for inputting a voice mail to the telephone, when the voice communication response packet indicates a negating response.
11. The computer readable medium according to claim 1, wherein the method steps further includes the step of:
transmitting, when the voice communication response packet indicates a negating response, a voice communication negating response to the line switching network.
12. A computer readable medium storing a program executable by a communication device to perform a method for a voice communication, the communication device being connected to a voice communication server performing a voice communication process between a plurality of telephones connected to a line switching network employing a telephone number scheme and a plurality of communication devices connected to a packet switching network employing a communication address scheme which is different from the telephone number scheme, the method comprising the steps of:
when a telephone number according to the telephone number scheme is input to identify one of the telephones as a communication partner, obtaining a communication address, according to the communication address scheme;
identifying the voice communication server in the packet switching network;
transmitting a voice communication request packet to the voice communication server which requests the telephone to communicate with the communication device;
receiving a voice communication response packet in response to the voice communication request packet from the voice communication server; and
when the voice communication response packet indicates an accepting response, transmittingreceiving a packet including voice information used for the voice communication with the telephone,
wherein the voice communication request packet includes the communication address obtained in the obtaining step, the telephone number and the communication address, according to the communication address scheme, identifying the communication device in the packet switching network.
13. The computer readable medium according to claim 12, the method further comprises the steps of:
inputting voice information;
encoding the input voice information;
decoding the encoded voice information in a received packet; and
outputting the decoded voice information,
wherein the packet transmittingreceiving step generates the packet including the voice information used for the voice communication using the encoded voice information.
14. The computer readable medium according to claim 12,
wherein the packet switching network is a TCPIP network, and wherein the voice communication request packet transmitting step, the voice communication response packet receiving step, and the voice information included packet transmittingreceiving step use TCPIP.
15. The computer readable medium according to claim 12,
wherein the packet switching network is a UDPIP network, and wherein the voice communication request packet transmitting step, the voice communication response packet receiving step, and the voice information included packet transmittingreceiving step use UDPIP.
16. The computer readable medium according to claim 12,
wherein the packet switching network is a Local Area Network (LAN).
17. The computer readable medium according to claim 12, wherein the method further comprises the steps of:
transmitting the voice communication request packet using TCP; and
transmitting the packet including the voice information using UDP.
18. The computer readable medium according to claim 12, wherein the method further comprises the step of:
transmitting an input voice message to the voice communication server using a voice mail, when the voice communication response packet indicates a negating response.