Disclosed herein is an endoscope. The endoscope includes a light source; an optical fiber having a light entrance portion and a light exit portion such that light containing image information on a site irradiated with light from the light source enters through the light entrance portion and light passing through the optical fiber exits through the light exit portion; and an image acquisition device acquiring the image information, wherein the image acquisition device includes: an image sensor acquiring information of light passing through the optical fiber; a transmission matrix storage unit previously storing a transmission matrix indicating a transmission state of various light components entering the light entrance portion; and an image recovery unit recovering the image information from the information of light acquired by the image sensor through compressed sensing using a sparse representation based on the transmission matrix.
1. An endoscope comprising;
a light source;
an optical fiber having a light entrance portion and a light exit portion such that light containing image information on a site irradiated with light from the light source enters through the light entrance portion and light passing through the optical fiber exits through the light exit portion; and
an image acquisition device acquiring the image information,
wherein the image acquisition device comprises:
an image sensor acquiring information of light passing through the optical fiber;
a memory configured to store a transmission matrix indicating a transmission state of various light components entering the light entrance portion; and
a processor configured to recovery the image information from the information of light acquired by the image sensor through compressed sensing using a sparse representation based on the transmission matrix.
2. The endoscope according to claim 1 , wherein the light source is a coherent light source.
3. The endoscope according to claim 2 , wherein the light source is a laser.
4. The endoscope according to claim 1 , wherein a beam splitter is disposed between the image acquisition device and the optical fiber, and allows both a signal beam passing through the optical fiber and a reference beam emitted from the light source to be transmitted to the image sensor.
5. The endoscope according to claim 1 , wherein turbid media are provided to the light entrance portion so as to increase a numerical aperture of the light entrance portion.
6. The endoscope according to claim 5 , wherein the turbid media are obtained by incorporating nanoscale fine particles into a transparent matrix.
7. The endoscope according to claim 6 , wherein the fine particles are formed of ZnO.
8. The endoscope according to claim 5 , wherein the turbid media are applied to the light entrance portion.
9. The endoscope according to claim 1 , wherein the optical fiber is a multimode fiber.
10. The endoscope according to claim 1 , wherein the transmission matrix comprises thousands of columns.
11. The endoscope according to claim 1 , wherein the columns of the transmission matrix are calculated at different light incident angles.
12. The endoscope according to claim 1 , wherein a lens system is provided to a downstream side of the light exit portion.
13. An endoscope comprising:
an optical fiber providing a propagation route for light containing image information; and
an image acquisition device acquiring the image information from light passing through the optical fiber,
wherein the image acquisition device comprises:
an image sensor acquiring information of light passing through the optical fiber;
a memory configured to store a transmission matrix indicating a transmission state of light components passing through the optical fiber at different incident angles; and
a processor configured to recovery the image information from the information of light acquired by the image sensor through compressed sensing using a sparse representation based on the transmission matrix.