US5825429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for generating interpolated image data
Assignee: Fujifilm Corp
•
Filing: 1996-03-15
•
Granted: 1998-10-20
•
Expires: 2016-03-15
Abstract
Abstract Blur-free, high-quality frame image data are generated from field image data. Image data of odd-numbered field images and image data of even-numbered field images are alternately applied every 1/60 of a second. The even field image data are applied to a first memory, and data of odd field images located immediately before and immediately after the even field image are applied to respective ones of a second memory and a third memory. Windows are set on the respective images and whether or not motion has occurred between the windows of the two odd field images is detected. If motion has not occurred, data of a pixel missing in the even field is generated using the pixel, of an odd field, at a position corresponding to this pixel missing in the even field and for which data are to be generated. If motion has occurred, the data of a pixel missing in the even field image is generated using pixels above and below the missing pixel in the even field and for which data are to be generated.
Inventors
- 👤 Ryuji Shirahata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:27
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/765; H04N5/77; H04N5/772; H04N1/00; H04N1/00127; H04N1/00281; H04N1/00283; H04N19/00; H04N19/50; H04N19/503; H04N19/51; H04N19/577; H04N5/14; H04N5/21; H04N5/144; H04N5/78; H04N5/782; H04N5/783; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; H04N9/8047
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
265 words
An apparatus for generating interpolated image data in which, when data of consecutive first, second and third field images are given from among a series of image data obtained by interlaced scanning wherein odd field images comprising pixels on odd lines and even field images comprising pixels on even lines repeat in alternating fashion, interpolated image data are generated representing pixels on even lines in a case where the second field is an odd field and pixels on odd lines in a case where the second field is an even field in order to convert said second field image, which is located between the first field image and the third field image, to a frame image, said apparatus comprising: motion detecting means for detecting whether motion has occurred between images in windows set at corresponding positions on respective ones of the first field image and third field image, wherein said windows are longer vertically than horizontally; first interpolated image data generating means which, when motion has been detected by said motion detecting means, is for generating image data of a pixel at a position corresponding to pixels in said windows based upon image data of pixels, of the second field, neighboring this pixel from above and below; and second interpolated image data generating means which, when no motion has been detected by said motion detecting means, is for generating image data of a pixel at a position corresponding to pixels in said windows based upon image data of a corresponding pixel in at least one of said first field image and said third field image.
Claim 2
Independent Claim
265 words
An apparatus for generating interpolated image data in which, when data of consecutive first, second and third field images are given from among a series of image data obtained by interlaced scanning wherein odd field images comprising pixels on odd lines and even field images comprising pixels on even lines repeat in alternating fashion, interpolated image data are generated representing pixels on even lines in a case where the second field is an odd field and pixels on odd lines in a case where the second field is an even field in order to convert said second field image, which is located between the first field image and the third field image, to a frame image, said apparatus comprising: motion detecting means for detecting whether motion has occurred between images in windows set at corresponding positions on respective ones of the first field image and third field image, wherein said windows are longer vertically than horizontally; first interpolated image data generating means which, when motion has been detected by said motion detecting means, is for generating image data of a pixel at a position corresponding to pixels in said windows based upon image data of pixels, of the second field, neighboring this pixel from above and below; and second interpolated image data generating means which, when no motion has been detected by said motion detecting means, is for generating image data of a pixel at a position corresponding to pixels in said windows based upon image data of a corresponding pixel in at least one of said first field image and said third field image.
Claim 3
Dependent Claim
84 words
The apparatus according to claim 1, further comprising means for performing control so as to repeat, at each position of said windows, motion detection processing by said motion detecting means and interpolated image data generating processing by said first interpolated image data generating means or interpolated image data generating processing by said second interpolated image data generating means while the positions of said windows are successively shifted on the first field image and third field image horizontally and vertically in increments of window size.
Claim 4
Dependent Claim
64 words
The apparatus according to claim 1, wherein said motion detecting means detects that motion has occurred when the value of a sum is greater than a predetermined threshold value, wherein said sum is obtained by summing, within said windows, differences between absolute values of levels of corresponding pixels in the window of the first field image and the window of the third field image.
Claim 5
Dependent Claim
38 words
The apparatus according to claim 3, wherein said threshold value is a value obtained by multiplying the number of pixels constituting said window by a numerical value of 1˜3 when the pixel level is represented by eight bits.
Claim 6
Dependent Claim
38 words
The apparatus according to claim 3, wherein said threshold value is a value obtained by multiplying the number of pixels constituting said window by a numerical value of 1.5˜2.5 when the pixel level is represented by eight bits.
Claim 7
Dependent Claim
22 words
The apparatus according to claim 1, wherein the number of pixels vertically of said windows is twice the number of pixels horizontally.
Claim 8
Dependent Claim
171 words
The apparatus according to claim 1, wherein said first interpolated image data generating means includes: means for extracting image data representing pixels above and below a pixel missing in the second field image, as well as image data representing pixels above and below pixels which should be present at positions neighboring the missing pixel in the horizontal direction, obtaining values of sums of the image data representing these pixels, and determining whether the values of said sums obtained are increasing or decreasing with regard to pixels in the horizontal direction; and means for generating data representing the missing pixel using the data representing the pixels above and below the missing pixel when the values of said sums are increasing or decreasing, calculating correlation values between pixels in three directions, namely of pixels above and below and diagonally above and below the missing pixel when the values of said sums are not increasing or decreasing, and generating data representing the missing pixel using data representing pixels which give the highest correlation value.
Claim 9
Independent Claim
249 words
A method of generating interpolated image data in which, when data of consecutive first, second and third field images are given from among a series of image data obtained by interlaced scanning wherein odd field images comprising pixels on odd lines and even field images comprising pixels on even lines repeat in alternating fashion, interpolated image data are generated representing pixels on even lines in a case where the second field is an odd field and pixels on odd lines in a case where the second field is an even field in order to convert said second field image, which his located between the first field image and the third field image, to a frame image, said method comprising: detecting whether there is motion between images in windows set at corresponding positions on respective ones of the first field image and third field image wherein the windows are longer vertically than horizontally; performing first interpolated image data generating processing, when motion has been detected, for generating image data of a pixel at a position corresponding to pixels in said windows based upon image data of pixels, of the second field, neighboring this pixel from above and below; and performing second interpolated image data generating processing, when no motion has been detected, for generating image data of a pixel at a position corresponding to pixels in said windows based upon image data of a corresponding pixel in at least one of said first field image and said third field image.
Claim 10
Independent Claim
249 words
A method of generating interpolated image data in which, when data of consecutive first, second and third field images are given from among a series of image data obtained by interlaced scanning wherein odd field images comprising pixels on odd lines and even field images comprising pixels on even lines repeat in alternating fashion, interpolated image data are generated representing pixels on even lines in a case where the second field is an odd field and pixels on odd lines in a case where the second field is an even field in order to convert said second field image, which his located between the first field image and the third field image, to a frame image, said method comprising: detecting whether there is motion between images in windows set at corresponding positions on respective ones of the first field image and third field image wherein the windows are longer vertically than horizontally; performing first interpolated image data generating processing, when motion has been detected, for generating image data of a pixel at a position corresponding to pixels in said windows based upon image data of pixels, of the second field, neighboring this pixel from above and below; and performing second interpolated image data generating processing, when no motion has been detected, for generating image data of a pixel at a position corresponding to pixels in said windows based upon image data of a corresponding pixel in at least one of said first field image and said third field image.
Claim 11
Dependent Claim
61 words
The method according to claim 8, further comprising repeating, at each position of said windows, the motion detection processing and said first interpolated image data generating processing or said second interpolated image data generating processing while the positions of said windows are successively shifted on the first field image and third field image horizontally and vertically in increments of window size.
Claim 12
Dependent Claim
166 words
The method according to claim 8, wherein said first interpolated image data generating processing includes: extracting image data representing pixels above and below a pixel missing in the second field image, as well as image data representing pixels above and below pixels which should be present at positions neighboring the missing pixel in the horizontal direction, obtaining values of sums of the image data representing these pixels, and determining whether values of said sums obtained are increasing or decreasing with regard to pixels in the horizontal direction; and generating data representing the missing pixel using the data representing the pixels above and below the missing pixel when the values of said sums are increasing or decreasing, calculating correlation values between pixels in three directions, namely of pixels above and below and diagonally above and below the missing pixel when the values of said sums are not increasing or decreasing, and generating data representing the missing pixel using data representing pixels which give the highest correlation value.
Claim 13
Dependent Claim
58 words
The method according to claim 8, wherein said detecting includes summing, within said windows, differences between absolute values of levels of corresponding pixels in the window of the first field image and the window of the third field image and determining that there is motion when a result of said summing is greater than a predetermined threshold value.
Claim 14
Dependent Claim
38 words
The method according to claim 11, wherein said determining includes obtaining the threshold value by multiplying the number of pixels constituting said window by a numerical value of 1˜3 when the pixel level is represented by eight bits.
Claim 15
Dependent Claim
38 words
The method according to claim 11, wherein said determining includes obtaining the threshold value by multiplying the number of pixels constituting said window by a numerical value of 1.5˜2.5 when the pixel level is represented by eight bits.
Claim 16
Dependent Claim
22 words
The method according to claim 8, wherein the number of pixels vertically is twice the number of pixels horizontally in said windows.
Claim 17
Independent Claim
345 words
An apparatus for generating interpolated image data in which, when data of consecutive first, second and third field images are given from among a series of image data obtained by interlaced scanning wherein odd field images comprising pixels on odd lines and even field images comprising pixels on even lines repeat in alternating fashion, interpolated image data are generated representing pixels on even lines in a case where the second field is an odd field and pixels on odd lines in a case where the second field is an even field in order to convert said second field image, which is located between the first field image and the third field image, to a frame image, said apparatus comprising: motion detecting means for detecting whether motion has occurred between images in windows set at corresponding positions on respective ones of the first field image and third field, said motion detecting means detects that motion has occurred when the value of a sum is greater than a predetermined threshold value, wherein said sum is obtained by summing, within said windows, differences between absolute values of levels of corresponding pixels in the window of the first field image and the window of the third field image, wherein said threshold value is a value obtained by multiplying the number of pixels constituting said window by a numerical value of 1˜3 when the pixel level is represented by eight bits; first interpolated image data generating means which, when motion has been detected by said motion detecting means, is for generating image data of a pixel at a position corresponding to pixels in said windows based upon image data of pixels, of the second field, neighboring this pixel from above and below; and second interpolated image data generating means which, when no motion has been detected by said motion detecting means, is for generating image data of a pixel at a position corresponding to pixels in said windows based upon image data of a corresponding pixel in at least one of said first field image and said third field image.
Claim 18
Independent Claim
345 words
An apparatus for generating interpolated image data in which, when data of consecutive first, second and third field images are given from among a series of image data obtained by interlaced scanning wherein odd field images comprising pixels on odd lines and even field images comprising pixels on even lines repeat in alternating fashion, interpolated image data are generated representing pixels on even lines in a case where the second field is an odd field and pixels on odd lines in a case where the second field is an even field in order to convert said second field image, which is located between the first field image and the third field image, to a frame image, said apparatus comprising: motion detecting means for detecting whether motion has occurred between images in windows set at corresponding positions on respective ones of the first field image and third field, said motion detecting means detects that motion has occurred when the value of a sum is greater than a predetermined threshold value, wherein said sum is obtained by summing, within said windows, differences between absolute values of levels of corresponding pixels in the window of the first field image and the window of the third field image, wherein said threshold value is a value obtained by multiplying the number of pixels constituting said window by a numerical value of 1˜3 when the pixel level is represented by eight bits; first interpolated image data generating means which, when motion has been detected by said motion detecting means, is for generating image data of a pixel at a position corresponding to pixels in said windows based upon image data of pixels, of the second field, neighboring this pixel from above and below; and second interpolated image data generating means which, when no motion has been detected by said motion detecting means, is for generating image data of a pixel at a position corresponding to pixels in said windows based upon image data of a corresponding pixel in at least one of said first field image and said third field image.
Claim 19
Dependent Claim
15 words
The apparatus according to claim 16, wherein the numerical value is between 1.5 and 2.5.
Claim 20
Dependent Claim
85 words
The apparatus according to claim 15, further comprising means for performing control so as to repeat, at each position of said windows, motion detection processing by said motion detection processing means and interpolated image data generating processing by said first interpolated image data generating processing means or interpolated image data generating processing said second interpolated image data generating processing while the positions of said windows are successively shifted on the first field image and third field image horizontally and vertically in increments of window size.
Claim 21
Dependent Claim
22 words
The apparatus according to claim 1, wherein the number of pixels vertically of said windows is twice the number of pixels horizontally.
Claim 22
Dependent Claim
171 words
The apparatus according to claim 15, wherein said first interpolated image data generating means includes: means for extracting image data representing pixels above and below a pixel missing in the second field image, as well as image data representing pixels above and below pixels which should be present at positions neighboring the missing pixel in the horizontal direction, obtaining values of sums of the image data representing these pixels, and determining whether the values of said sums obtained are increasing or decreasing with regard to pixels in the horizontal direction; and means for generating data representing the missing pixel using the data representing the pixels above and below the missing pixel when the values of said sums are increasing or decreasing, calculating correlation values between pixels in three directions, namely of pixels above and below and diagonally above and below the missing pixel when the values of said sums are not increasing or decreasing, and generating data representing the missing pixel using data representing pixels which give the highest correlation value.
References Cited (Backward Citations)
JPS63187785A
Cited
US4937667A
Cited
US4967271A
Cited
US5016101A
Cited
JPH0486185A
Cited
US5081532A
Cited
JPH04366894A
Cited
US5339109A
Cited
US5444493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-10-19 | 2002-04-20 | 2002-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-19 | 2006-04-20 | 2006-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-19 | 2010-04-20 | 2010-10-20 | $7700.00 | Window Closed / Lapsed |