1. A method of forming monodispersed silver nanowires comprising:
mixing a capping agent in a polyol to form a substantially homogeneous solution;
elevating the temperature of the solution to a level below a boiling point of the solution to form a heated solution;
diluting the solution with a diluant selected from the materials consisting of water and alcohol, thereby forming the nanowires;
centrifuging the solution to separate the silver nanowires.
2. The method of claim 1, further comprising:
adding a trace amount of aqueous metal chloride solution to the solution;
mixing the capping agent in the polyol includes mixing polyvinylpyrrolidone (PVP) powder and silver nitrate powder, feeding the PVP and silver nitrate powder into the polyol to form the homogeneous solution, and adding the trace amount of the aqueous metal chloride solution.
3. The method of claim 2, wherein the elevating the temperature of the solution comprises raising the temperature to between 210\xb0 C. and the boiling temperature of the solution;
allowing the solution to cool prior to diluting the solution with the diluant.
4. The method of claim 2, wherein the elevating the temperature of the solution comprises raising the temperature to between 170\xb0 C. and 220\xb0 C., and below a boiling temperature of the solution;
and the method further comprises:
allowing the solution to cool prior to diluting the solution with the diluant.
5. The method of claim 2, wherein the elevating the temperature of the solution comprises raising the temperature to between 170\xb0 C. and 220\xb0 C., and below a boiling temperature of the solution;
and the method further comprises:
allowing the solution to cool after diluting the solution with the diluant.
6. The method of claim 2, further comprising centrifuging the diluted solution at least part of the time of said elevating the temperature of the solution to a level below a boiling point of the polyol.
7. The method of claim 1, further comprising:
the mixing a capping agent in a polyol to form a substantially homogeneous solution comprising adding the capping agent and a chloride salt in a reducing solvent;
forming a reaction solution including a silver salt; and
forming metal nanowires by reducing the silver salt in the reaction solution.
8. The method of claim 7, wherein the reaction solution comprises: a silver salt; a capping agent; a chloride salt, a reducing solvent, and 0.001%\u02dc5% water as a ripening controlling agent
9. The method of claim 8, wherein the silver salt consists of at least one compound selected from the group consisting of silver nitrate, silver acetate, silver tetraborate, silver trifluoroacetate, or silver perchlorate.
10. The method of claim 8, wherein the chloride salt comprises of at least one compound selected from the group consisting of LiCl, NaCl, KCl, NH4Cl, CaCl2 and MgCl2.
11. The method of claim 8, wherein the capping agent comprises of at least one compound selected from the group consisting of polyvinyl pyrrolidone, polyacrylamide and copolymers thereof.
12. The method of claim 11, wherein the capping agent is polyvinylpyrrolidone (PVP), having a molecular weight within the range of from 1,000 to 5,000,000.
13. The method of claim 8, comprising using glycerol as the reducing solvent.
14. The method of claim 1, further comprising:
determining the components as solid reactants and liquid solvents;
mixing the solid reactants into the liquid solvents at a first temperature in the range of 20\xb0 C. to 150\xb0 C.; and
carrying out the reducing reaction at a second temperature of 170\xb0 C. to 220\xb0 C.
15. The method of claim 1, wherein the reaction solution consists of at least one compound selected from the group consisting of silver nitrate, polyvinylpyrrolidone (PVP), sodium chloride, water and glycerol.
16. The method of claim 1, further comprising using a molar ratio of the chloride salt and the silver salt of between about 0.001 and 0.5.
17. The method of claim 1, further comprising using a molar ratio of the water and the reducing agent of between 0.001 and 0.3.
18. The method of claim 1, further comprising using as the capping agent consists of at least one compound selected from the group consisting of polyvinylpyrrolidone (PVP), polyacrylamide and copolymers thereof having a molecular weight of 1,000 to 5,000,000.
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. An imaging device comprising:
a memory unit that stores conversion information which is derived based on a correction coefficient which provides, in a predetermined allowable range from a minimum value, a sum of a norm of a difference between a color difference of a correction target color and a target color which is a target of correction of the correction target color and a correction color obtained by correcting the correction target color using the correction coefficient, and a norm of the correction coefficient to which a predetermined weight coefficient is applied;
an image capturing unit that captures an image; and
a color converting unit that converts a color of each pixel of the image captured by the image capturing unit, based on the conversion information stored in the memory unit.
2. The imaging device according to claim 1 further comprising
a color space converting unit that converts a color space of the image captured by the image capturing unit into a color space of brightness and a color difference, and
the memory unit stores the conversion information which is derived based on the correction coefficient which provides, in the predetermined allowable range from the minimum value, a sum of a norm of a difference between the color difference of the correction target color and the target color and the correction color obtained by correcting the correction target color using the correction coefficient in the color space of the brightness and the color difference, and the norm of the correction coefficient to which the predetermined weight coefficient is applied, and
the color converting unit converts the color of each pixel of the image converted into the color space of the brightness and the color difference by the color space converting unit, based on the conversion information.
3. The imaging device according to claim 1, wherein
the memory unit stores the conversion information which is derived based on the correction coefficient which provides, in the predetermined allowable range from the minimum value, a sum of a norm of a difference between the color difference of the correction target color and the target color and the correction color obtained by correcting the correction target color using the correction coefficient in the color space of the brightness and the color difference, and the norm of the correction coefficient to which the predetermined weight coefficient is applied, and which is converted into a color space used for the image captured by the image capturing unit.
4. The imaging device according to claim 1, wherein
the memory unit stores as the conversion information a total correction coefficient obtained by adding a unit matrix to the correction coefficient, and
the color converting unit converts the color by multiplying each color component forming a color of each pixel of the image captured by the image capturing unit, with the total correction coefficient stored as the conversion information.
5. A non-transitory computer-readable recording medium having stored therein a program for causing a computer to execute a process for image processing, the process comprising:
storing, in a memory unit, conversion information which is derived based on a correction coefficient which provides, in a predetermined allowable range from a minimum value, a sum of a norm of a difference between a color difference of a correction target color and a target color which is a target of correction of the correction target color and a correction color obtained by correcting the correction target color using the correction coefficient, and a norm of the correction coefficient to which a predetermined weight coefficient is applied; and
converting a color of each pixel of a correction target image based on the conversion information stored in the memory unit.
6. The non-transitory computer-readable recording medium according to claim 5, wherein the process further comprising
additionally converting a color space of the correction target image into a color space of brightness and a color difference;
the storing stores, in the memory unit, the conversion information which is derived based on the correction coefficient which provides, in the predetermined allowable range from the minimum value, a sum of a norm of a difference between the color difference of the correction target color and the target color and the correction color obtained by correcting the correction target color using the correction coefficient in the color space of the brightness and the color difference, and the norm of the correction coefficient to which the predetermined weight coefficient is applied, and
the converting converts the color of each pixel of the image converted into the color space of the brightness and the color difference based on the conversion information.
7. The non-transitory computer-readable recording medium according to claim 5, wherein
the storing stores the conversion information which is derived based on the correction coefficient which provides, in the predetermined allowable range from the minimum value, a sum of a norm of a difference between the color difference of the correction target color and the target color and the color difference and the correction color obtained by correcting the correction target color using the correction coefficient in the color space of the brightness and the color difference, and the norm of the correction coefficient to which the predetermined weight coefficient is applied, and which is converted into a color space used for an image captured by an image capturing unit, and
the converting converts the color of each pixel of the correction target image based on the conversion information.
8. The non-transitory computer-readable recording medium according to claim 5, wherein
the converting converts the color by multiplying each color component forming a color of each pixel of the correction target image, with a total correction coefficient obtained by adding a unit matrix to the correction coefficient.
9. An image processing device comprising:
a calculating unit that calculates a correction coefficient which provides, in a predetermined allowable range from a minimum value, a sum of a norm of a difference between a color difference of a correction target color and a target color which is a target of correction of the correction target color and a correction color obtained by correcting the correction target color using the correction coefficient, and a norm of the correction coefficient to which a predetermined weight coefficient is applied;
an acquiring unit that acquires a correction target image; and
a color converting unit that converts a color of each pixel of the correction target image acquired by the acquiring unit, based on conversion information derived based on the correction coefficient calculated by the calculating unit.
10. The image processing device according to claim 9 further comprising
a color space converting unit that converts a color space of the target color and the correction target color into a color space of brightness and a color difference, and
the calculating unit calculates the correction coefficient which provides, in the predetermined allowable range from the minimum value, a sum of a norm of a difference between the color difference of the correction target color and the target color and the correction color obtained by correcting the correction target color using the correction coefficient in the color space of the brightness and the color difference, and the norm of the correction coefficient to which the predetermined weight coefficient is applied.
11. The image processing device according to claim 10, wherein the color space converting unit converts the correction coefficient calculated by the calculating unit, into a color space used for the correction target image.
12. The image processing device according to claim 9, wherein the calculating unit calculates a total correction coefficient by adding a unit matrix to the correction coefficient.
13. A non-transitory computer-readable recording medium having stored therein a program for causing a computer to execute a process for image processing, the process comprising:
calculating a correction coefficient which provides, in a predetermined allowable range from a minimum value, a sum of a norm of a difference between a color difference of a correction target color and a target color which is a target of correction of the correction target color and a correction color obtained by correcting the correction target color using the correction coefficient, and a norm of the correction coefficient to which a predetermined weight coefficient is applied; and
converting a color of each pixel of a correction target image based on conversion information derived based on the calculated correction coefficient.
14. The non-transitory computer-readable recording medium according to claim 13 wherein the process further comprising:
additionally converting a color space of the target color and the correction target color into a color space of brightness and a color difference; and
the calculating calculates the correction coefficient which provides, in the predetermined allowable range from the minimum value, a sum of a norm of a difference between the color difference of the correction target color and the target color and the color difference and the correction color obtained by correcting the correction target color using the correction coefficient in the color space of the brightness and the color difference, and the norm of the correction coefficient to which the predetermined weight coefficient is applied.
15. The non-transitory computer-readable recording medium according to claim 14 wherein
the additionally converting converts the calculated correction coefficient into a color space used for the correction target image.
16. The non-transitory computer-readable recording medium according to claim 13 wherein
the calculating calculates a total correction coefficient by adding a unit matrix to the correction coefficient.