1. An image processing method for filtering image data, which is constituted with a plurality of pixels, at each pixel position by using pixel values indicated by pixels present within a predetermined range containing a target pixel, comprising:
determining two arguments that are a first argument defined by a spatial distance from the target pixel and a second argument defined by a difference in signal intensity relative to the target pixel, in correspondence to each of the pixels present within the predetermined range;
obtaining a weighting coefficient to be used when filtering each of the pixels present within the predetermined range, based upon the first argument and the second argument;
determining the weighting coefficient by ensuring that w(A1,B1)w(A1,B2)\u2260w(A2,B1)w(A2,B2) is true with A1 and A2 representing different values taken for the first argument, B1 and B2 representing different values taken for the second argument, and w(An, Bn) representing the weighting coefficient being obtained; and
filtering the image data by using a filter coefficient corresponding to the weighting coefficient having been obtained.
2. An image processing method according to claim 1, wherein:
the weighting coefficient is determined by ensuring that w(A1,B1)w(A1,B2)<w(A2,B1)w(A2,B2) is true when 0\u2266A1<A2 and 0\u2266B1<B2.
3. An image processing method according to claim 1, wherein:
the first argument and the second argument are integrated with each other to constitute an argument in an exponential function expression representing a single Gaussian distribution.
4. An image processing method for filtering image data V(vector r), which is constituted with a plurality of pixels, at each pixel position by using a pixel value V(vector r\u2032) corresponding to a pixel vector r\u2032 within a predetermined range containing a target pixel vector r, comprising:
filtering the image data by executing arithmetic operation expressed as
V
\u2032
\u2061
(
r
\u2192
)
=
\u222b
V
\u2061
(
r
\u2192
)
\xb7
exp
\u2062
{
–
\uf603
V
\u2061
(
r
\u2192
\u2032
)
–
V
\u2061
(
r
\u2192
)
\uf604
2
\u03c3
th
2
\xb7
\uf603
r
\u2192
\u2032
–
r
\u2192
\uf604
2
r
th
2
}
\u2062
\u2146
r
\u2192
\u2032
\u222b
exp
\u2062
{
–
\uf603
V
\u2061
(
r
\u2192
\u2032
)
–
V
\u2061
(
r
\u2192
)
\uf604
2
\u03c3
th
2
\xb7
\uf603
r
\u2192
\u2032
–
r
\u2192
\uf604
2
r
th
2
}
\u2062
\u2146
r
\u2192
\u2032
Expression
\u2062
\u2062
1
with vector r=r with an arrow above, vector r\u2032=r\u2032 with an arrow above, \u03c3th and rth respectively representing a constant and vector r indicating a coordinate position of the pixel.
5. An image processing method according to claim 4, wherein:
the predetermined range for filtering is integrated over a range approximately twice rth.
6. A non-transitory computer-readable medium storing a computer program product, comprising:
an image processing program that enables a computer or an image processing apparatus to execute image processing with the image processing method according to claim 1.
7. An image processing apparatus, comprising:
a control device that executes image processing with the image processing method according to claim 1.
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 display apparatus comprising: a fluorescent screen including a color-filter layer and a phosphor layer, which is formed on the inside surface of a panel glass having light transmissivity of 55% to 20% when a wavelength is 546 nm and a plate thickness is 20 mm and in which at least said phosphor layer is formed by a transfer method.
2. A display apparatus according to claim 1, wherein the fluorescent screen is provided in which either an intermediate film or a metal-back layer on the phosphor layer, or both the intermediate film and the metal-back layer are formed by the transfer method.
3. A display apparatus according to claim 1, wherein the fluorescent screen on which the metal-back layer is directly formed by the transfer method is provided.
4. A display apparatus comprising: a fluorescent screen including a color-filter layer and a phosphor layer, which is formed on the inside surface of a panel glass and in which said phosphor layer is formed by a transfer method using a photosensitive phosphor layer containing no Cr and a film thickness of the phosphor layer is 10 \u03bcm to 15 \u03bcm.
5. A display apparatus according to claim 4, wherein as said panel glass, a panel glass having light transmissivity of 55% to 20% when a wavelength is 546 nm and a plate thickness is 20 mm is employed.
6. A display apparatus according to claim 1, wherein an antireflective film is formed on the outside surface of said panel glass.
7. A display apparatus according to claim 2, wherein an antireflective film is formed on the outside surface of said panel glass.
8. A display apparatus according to claim 3, wherein an antireflective film is formed on the outside surface of said panel glass.
9. A display apparatus according to claim 4, wherein an antireflective film is formed on the outside surface of said panel glass.
10. A display apparatus according to claim 5, wherein an antireflective film is formed on the outside surface of said panel glass.
11. A color cathode-ray tube comprising: a fluorescent screen including a color-filter layer and a phosphor layer, which is formed on the inside surface of a panel glass having light transmissivity of 55% to 20% when a wavelength is 546 nm and a plate thickness is 20 mm and in which at least said phosphor layer is formed by a transfer method.
12. A color cathode-ray tube according to claim 11, wherein the fluorescent screen is provided in which either an intermediate film or a metal-back layer on the phosphor layer, or both the intermediate film and the metal-back layer are formed by the transfer method.
13. A color cathode-ray tube according to claim 11, wherein the fluorescent screen on which the metal-back layer is directly formed by the transfer method is provided.
14. A color cathode-ray tube comprising: a fluorescent screen including a color-filter layer and a phosphor layer, which is formed on the inside surface of a panel glass and in which said phosphor layer is formed by a transfer method using a photosensitive phosphor layer containing no Cr and a film thickness of the phosphor layer is 10 \u03bcm to 15 \u03bcm.
15. A color cathode-ray tube according to claim 14, wherein as said panel glass, the panel glass having light transmissivity of 55% to 20% when a wavelength is 546 nm and a plate thickness is 20 mm is employed.
16. A color cathode-ray tube according to claim 11, wherein an antireflective film is formed on the outside surface of said panel glass.
17. A color cathode-ray tube according to claim 12, wherein an antireflective film is formed on the outside surface of said panel glass.
18. A color cathode-ray tube according to claim 13, wherein an antireflective film is formed on the outside surface of said panel glass.
19. A color cathode-ray tube according to claim 14, wherein an antireflective film is formed on the outside surface of said panel glass.
20. A color cathode-ray tube according to claim 15, wherein an antireflective film is formed on the outside surface of said panel glass.