WO2016152343A1 - Dispositif de capture d'image, et système de capture d'image - Google Patents

Dispositif de capture d'image, et système de capture d'image Download PDF

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Publication number
WO2016152343A1
WO2016152343A1 PCT/JP2016/054712 JP2016054712W WO2016152343A1 WO 2016152343 A1 WO2016152343 A1 WO 2016152343A1 JP 2016054712 W JP2016054712 W JP 2016054712W WO 2016152343 A1 WO2016152343 A1 WO 2016152343A1
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information
pixel
horizontal
green
correction
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PCT/JP2016/054712
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English (en)
Japanese (ja)
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中村　和彦
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株式会社日立国際電気
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Priority to JP2017507610A priority Critical patent/JP6456001B2/ja
Publication of WO2016152343A1 publication Critical patent/WO2016152343A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
    • H04N23/12—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths with one sensor only

Definitions

  • the present invention relates to an imaging apparatus and an imaging method.
  • a CDS Correlated Double Sampling
  • CCD Charge Coupled Device
  • ADC dark current correction and variable gain amplifier
  • ADC ADC
  • AFE Analog Front End
  • CMOS Complementary Metal Oxicide Semiconductor
  • the focal length also varies depending on the wavelength of light, and the focal length of the lens varies depending on the wavelength.
  • a chromatic aberration of magnification occurs with different magnifications and different image sizes.
  • the degree of modulation of the entire screen is reduced by spherical aberration in which the position of the condensing point in the optical axis direction changes depending on the distance from the optical axis of the incident point.
  • Light from one point outside the optical axis spreads on one side of the radiation direction like a coma (comet) due to coma (comet-like) aberration that does not converge to one point on the image plane.
  • the outline collapses differs between the outside and inside. Furthermore, due to astigmatism in which the image point in the concentric direction and the image point in the radial direction deviate from the light beam from one point off the optical axis, the circumferential outline collapses and the radial outline collapse occurs around the screen. Is different.
  • Spherical aberration is proportional to the third power of NA and is the only aberration that appears at the center of the screen regardless of the width of the field of view. If the refractive index of the concave lens is higher than that of the convex lens, a double lens doublet is more than a single lens. Spherical aberration is reduced by one digit or more. Further, coma aberration is proportional to the square of the aperture ratio NA that is the reciprocal of the aperture ratio F and the first power of the field of view, and the way in which the outline collapses is different between the outer side and the inner side in the radiation direction around the screen. Astigmatism is proportional to the first power of NA and the second power of the field of view.
  • the phenomenon that the light collected by the lens does not converge at one point is aberration.
  • the spherical aberration and coma aberration are optically corrected, and the deviation of the focal position due to the difference in the wavelength of the light is red.
  • Optical correction at two points of C line (656.3 nm) and blue F line (486.1 nm) is called achromatic achromat.
  • purple g-line (435.8nm) is added, and chromatic aberration is corrected optically at three wavelengths (which is the difference between the centroid position of red and blue coma aberration and the centroid position of green coma aberration).
  • Apochromat and Abbe have named those that satisfy the conditions such as spherical aberration and coma corrected optically.
  • the residual aberration differs depending on the optical aberration correction method.
  • a high-power zoom lens often used for relay is easy to optically correct spherical aberration and coma at two wavelengths at an intermediate focal length, but spherical aberration and coma at two wavelengths at the wide-angle end and telephoto end. Is difficult to correct optically.
  • a lens in which spherical aberration and coma aberration are optically corrected at three wavelengths is large and expensive even with a single focus lens or a low magnification zoom lens, like a movie lens.
  • the blue spherical aberration and coma aberration are not optically corrected except for the lens specifically considered. Since the center of gravity position of red-blue coma aberration does not change so much due to individual differences or the diaphragm, the correction value of lateral chromatic aberration for electronically correcting the position of center of gravity of red-blue coma aberration does not change much at the diaphragm. However, since the flare component of the red-blue coma aberration is inversely proportional to the aperture value, the color blur, which is the flare component of the red-blue coma aberration, is also inversely proportional to the aperture value.
  • color blur which is a flare component of red-blue coma aberration
  • the color blur which is the flare component of red-blue coma aberration
  • the color blur that is the flare component of the red-blue coma aberration in the high-luminance portion is compressed by knee and is not noticeable, but the color blur that is the flare component of the red-blue coma aberration in the dark portion is conspicuous.
  • Patent Document 1 As a prior art document, for example, in an image pickup apparatus having a lens, an image pickup element, and a video signal processing circuit including a contour correction function in Patent Document 1, there are a plurality of line memories having eight or more line memories and delayed by an integer horizontal period. A vertical contour correction signal is generated from each of the video signals, and a horizontal contour correction signal is generated from a plurality of video signals having a pixel delay function of 8 or more and delayed by an integer number of pixels. A technique for adding a contour correction signal and the horizontal contour correction signal is disclosed.
  • Patent Document 2 discloses a technique in which an image that has been subjected to distortion correction by image processing is subjected to image sharpening processing of aperture correction processing or edge enhancement processing only in the concentric direction, and image sharpening processing is not performed in the radiation direction. It is disclosed.
  • the object of the present invention is to reduce the color blur that is the flare component of the coma aberration of the red-blue coma in the high-intensity part of the lens where the image is spread as a flare component on one side in the radiation direction like a coma (comet).
  • Color blur that is compressed and inconspicuous but is a flare component of dark red and blue coma) is conspicuous, so an imaging device that corrects the coma aberration flare component of the lens that blurs the color of the edge of a bright subject Is to realize.
  • the imaging device of the present invention is a wide-aspect high-resolution imaging device, a lens unit that optically corrects green-red-blue chromatic aberration, green-red spherical aberration, and coma aberration, and product information and aperture ratio of the lens unit.
  • An imaging apparatus is the above-described imaging apparatus, wherein the high-resolution imaging apparatus includes a lens unit in which chromatic aberration is optically corrected in red, green, blue, lens type information, focal length information, and aperture ratio.
  • Information a means for acquiring and storing coma aberration information of the lens unit, a type information of the acquired lens unit, focal length information, aperture ratio information, and the stored at least blue coma aberration information, Means to individually calculate the green contour correction amount that approximates the blue flare independently of the distance from the center of the screen, and to add the green at least horizontal contour correction contour signal independently to the blue video signal It is characterized by having.
  • the imaging device of the present invention is a wide-aspect high-resolution imaging device having at least a horizontal contour correction, optically correcting chromatic aberration with red, green and blue, and optically correcting spherical aberration and coma with red and green.
  • Pixels corresponding to video signals from means acquired optical system type information, focal length information, aperture ratio information, stored coma aberration information, created contour correction control relationship information, horizontal synchronization signal, and pixel clock
  • the horizontal flare correction amount is calculated separately for the left and right horizontal flare correction corresponding to the screen position proportional to the distance from the screen center and the pixel distance from the screen center.
  • the green horizontal multi-pixel contour correction signal from the previous pixel to the pixel before the horizontal flare correction is added to the blue video signal, and immediately after the high-brightness pixel above the first reference on the right side of the blue video signal screen
  • Means for adding the green horizontal multi-pixel contour correction signal from the pixel to the pixel after horizontal flare correction to the blue video signal, and the amount of correction between the generated screen position and the left and right of the horizontal flare correction It is characterized by having means for individually calculating and separately performing correction amounts for left and right of horizontal flare correction.
  • the imaging method of the present invention is a wide-aspect high-resolution imaging apparatus that uses a lens unit that optically corrects green and red spherical aberration and coma aberration, and uses the lens unit type information and aperture ratio information.
  • Acquire store and store coma aberration information of the lens unit, and at least use horizontal contour correction, and from the acquired lens type information, aperture ratio information, and the stored coma aberration information, Adding at least a horizontal contour correction signal of at least green from a pixel outside at least a horizontal contour correction pixel of a high-brightness pixel equal to or higher than the first reference to immediately before the high-brightness pixel to a blue video signal. To do.
  • the imaging method of the present invention is the above-described imaging method, wherein the high-resolution imaging device uses a lens unit in which chromatic aberration is optically corrected with red, green, blue, and the lens unit type information and focal length information.
  • the aperture ratio information is acquired, the coma aberration information of the lens unit is acquired and stored, and the distance from the center of the screen is determined based on the acquired lens type information, focal length information, aperture ratio information, and the stored coma aberration information.
  • a green horizontal contour correction amount is individually calculated proportionally independently on the left and right sides, and the green horizontal contour correction signal is added to the blue video signal independently on the left and right.
  • a lens having a large amount of color blur due to a flare component of blue or red coma at the edge of the screen can output a video signal in which the blur of the blue or red color of the edge of the high-brightness subject at the edge of the screen is suppressed.
  • FIG. 1 is a block diagram for explaining an imaging apparatus according to an embodiment of the present invention.
  • the imaging device 3 includes an imaging unit 2, a signal processing unit 4, a screen position control unit 5, and a CPU (Central Processing Unit) unit 6.
  • the imaging device 3 is connected to the lens unit 1.
  • the screen position control unit 5 acquires the lens type information, focal length information, and aperture ratio information of the lens unit 1 from the CPU unit 6, acquires the position information of the video signal from the horizontal synchronization signal and the pixel clock, and R (Red)
  • a flare correction control signal is generated from the video level of the signal or B (Blue) signal and the video level of the G (Green) signal.
  • the incident light converged by the lens unit 1 is mounted with a CMOS image sensor that integrates a color separation optical system and peripheral circuits, a CCD image sensor that integrates peripheral circuits, or an on-chip color filter of the image pickup unit 2 of the image pickup device 3.
  • a CCD image sensor that integrates peripheral circuits and a CCD image sensor that integrates peripheral circuits, and becomes an image signal and is composed of an FPGA (Field Programmable Gate Array) controlled by the CPU 6 (vertical contour correction, horizontal With a flare correction function by coma aberration in proportion to the distance from the center of the screen corresponding to the level of the high brightness point of B (blue video signal) or R (red video signal) (such as contour correction or oblique contour correction)
  • the signal processing unit 4 performs signal processing.
  • FIG. 2A is a schematic diagram illustrating the overlapping state of the pixels at the bonding position of the four-plate image sensor of the image pickup apparatus according to the embodiment of the present invention.
  • FIG. 2A (a) shows a Bayer array equivalent
  • FIG. 2A (b) shows a diagonal half-pixel shift only for G1G2 (Green1 image sensor and Green2 image sensor).
  • FIG. 2B is a schematic diagram illustrating an arrangement of a single plate on-chip color filter of the imaging apparatus according to the embodiment of the present invention.
  • FIG. 2A (a) shows a Bayer array equivalent
  • FIG. 2A (b) shows a diagonal half-pixel shift only for G1G2 (Green1 image sensor and Green2 image sensor).
  • FIG. 2B is a schematic diagram illustrating an arrangement of a single plate on-chip color filter of the imaging apparatus according to the embodiment of the present invention.
  • the arrangement corresponding to the single-layer Bayer arrangement is such that G1 (Green1) pixels and G2 (Green2) pixels are arranged obliquely, and R (Red) pixels and B (Blue) pixels are arranged obliquely. .
  • FIG. 3A is a block diagram of a blue or red horizontal flare correction unit according to an embodiment of the present invention.
  • the horizontal flare correction unit 14H in FIG. 3A is built in the signal processing unit 4 in FIG. 3A, the horizontal flare correction unit 14H includes a 4-pixel delay unit 54, pixel delay units D0 to D7, adders 40 to 43, 53, negative multipliers N0 to N3, N5 to N8, a positive multiplier P4, It consists of video level determination units 48 and 49.
  • the R (Red) signal or the B (Blue) signal is delayed by 4 pixels by the 4 pixel delay unit 54, and the horizontal flare correction signal generated from the G (Green) signal is added by the adder 53 to add the corrected R signal. Alternatively, it is output as a corrected B signal.
  • the CPU unit 6 outputs relationship information (horizontal pixel number and contour correction amount) of the screen position and the left and right independent variable contour correction control from the lens type information, focal length information, and aperture ratio information to the image position control unit 5.
  • the image position control unit 5 includes a horizontal pixel counter having a leading edge from 0d to 3d and a trailing edge from 5d to 8d.
  • the video level determination unit 49 determines the level of the R signal or the B signal, and outputs the determination result to the image position control unit 5 when the level is 200% or more of the rated level, for example.
  • the video level determination unit 48 determines the 4d level obtained by delaying the G (Green) signal by 4 pixels, and outputs the determination result to the image position control unit 5 when the level is 200% or more of the rated level, for example.
  • the image position control unit 5 controls the negative multipliers N0 to N3 with the trailing edge flare correction control signal according to the determination results of the video level determination unit 49 and the video level determination unit 48, and the negative multipliers N5 to N8
  • the positive multiplier P4 is controlled by the leading edge flare correction control signal to generate a horizontal flare correction signal.
  • FIG. 3B is a block diagram of a blue or red vertical flare correction unit according to an embodiment of the present invention.
  • the vertical flare correction unit 14V of FIG. 3B is built in the signal processing unit 4 of FIG.
  • the vertical flare correction unit 14V includes a four-line memory unit M8, line memory units M0 to M7, adders 40 to 43, 53, negative multipliers N0 to N3, N5 to N8, a positive multiplier P4, It consists of video level determination units 48 and 49.
  • the R (Red) signal or the B (Blue) signal is delayed by 4 lines in the 4-line memory unit M8, and the vertical flare correction signal generated from the G (Green) signal is added by the adder 53 to add the corrected R signal. Alternatively, it is output as a corrected B signal.
  • the CPU unit 6 outputs relationship information (horizontal pixel number and contour correction amount) of the screen position and the left and right independent variable contour correction control from the lens type information, focal length information, and aperture ratio information to the image position control unit 5.
  • the image position control unit 5 includes a horizontal pixel counter for the leading edge from 0H to 3H and after 5H to 8H.
  • the video level determination unit 49 determines the level of the R signal or the B signal, and outputs the determination result to the image position control unit 5 when the level is 200% or more of the rated level, for example.
  • the video level determination unit 48 determines the 4H level obtained by delaying the G (Green) signal by 4H (scanning line), and outputs the determination result to the image position control unit 5 when the level is 200% or more of the rated level, for example. To do.
  • the image position control unit 5 controls the negative multipliers N0 to N3 with the trailing edge flare correction control signal according to the determination results of the video level determination unit 49 and the video level determination unit 48, and the negative multipliers N5 to N8
  • the positive multiplier P4 is controlled by the leading edge flare correction control signal to generate a vertical flare correction signal.
  • FIG. 3C is a block diagram of a blue or red oblique flare correction unit according to an embodiment of the present invention.
  • the oblique flare correction unit 14D shown in FIG. 3C is built in the signal processing unit 4 shown in FIG. 3C, the oblique flare correction unit 14D includes frame memory units M9 and M18, adders 40 to 43 and 53, negative multipliers N0 to N3 and N5 to N8, a positive multiplier P4, a video level determination unit 48, 49.
  • the R (Red) signal or the B (Blue) signal is delayed by 2H + 2d in the frame memory unit M9, and the adder 53 adds the diagonal flare correction signal generated from the G (Green) signal to correct the corrected R signal or correction. It is output as a rear B signal.
  • the CPU unit 6 outputs lens type information, focal length information, and aperture ratio information to the image position control unit 5.
  • the image position control unit 5 includes horizontal pixel counters of the outer edge and the inner edge from 0H ⁇ 2d to 4H +
  • the video level determination unit 49 determines the level of the R signal or the B signal, and outputs the determination result to the image position control unit 5 when the level is 200% or more of the rated level, for example.
  • the video level determination unit 28 determines the level of 2H + 2d obtained by delaying the G (Green) signal by 2H + 2d (2 scanning lines + 2 pixels). For example, when the level is 200% or more of the rated level, the video position determination unit 5 determines Output the result.
  • the image position control unit 5 controls the negative multipliers N0 to N3 with the upper right upper right oblique contour correction number control signal in accordance with the determination results of the video level determination unit 49 and the video level determination unit 28, and the negative multiplier N5 ... N8 and the positive multiplier P4 are controlled by the lower left upper right oblique contour correction number control signal to generate an oblique flare correction signal.
  • FIG. 4A is a schematic diagram for explaining generation of a flare correction signal according to an embodiment of the present invention.
  • (a) is 8d, 8H, 8d8H, 0d8H, signal before correction
  • (b) is 7d, 7H, 7d7H, 1d7H, signal before correction
  • (c) is 6d, 6H, 6d6H, 2d6H, before correction.
  • (D) is 5d, 5H, 5d5H, 3d5H, signal before correction
  • (e) is 4d, 4H, 4d4H, 4d4H, signal before correction
  • (f) is 3d, 3H, 3d3H, 5d3H, signal before correction
  • (g) is 2d, 2H, 2d2H, 6d2H, signal before correction
  • (h) is 1d, 1H, 1d1H, 7d1H, signal before correction
  • (i) is 0d0H, 0d0H, 8d0H, signal before correction
  • (j) Is a signal after asymmetric independent contour correction.
  • FIG. 4B is a schematic diagram for explaining generation of a flare correction signal according to another embodiment of the present invention.
  • (a) is 8d, 8H, 8d8H, 0d8H, signal before correction
  • (b) is 7d, 7H, 7d7H, 1d7H, signal before correction
  • (c) is 6d, 6H, 6d6H, 2d6H, before correction.
  • (D) is 5d, 5H, 5d5H, 3d5H, signal before correction
  • (e) is 4d, 4H, 4d4H, 4d4H, signal before correction
  • (f) is 3d, 3H, 3d3H, 5d3H, signal before correction
  • (h) 1d, 1H, 1d1H, 7d1H, signal before correction, (i) 0d0H, 0d0H, 8d0H, signal before correction
  • (j) Asymmetric independent contour corrected signal).
  • the imaging apparatus is configured to collapse the edge of the contour of the lens unit 1 in the center in the radial direction from the lens information such as the product information of the lens unit 1, the focal length information, and the aperture ratio information.
  • a means (CPU unit 6) for creating a relation information (horizontal pixel number, vertical scanning line number, and correction amount) between the screen position and flare correction control corresponding to the difference in the direction of the edge of the outward contour and the outward direction.
  • the distance from the screen center of the pixel corresponding to the video signal (the number of horizontal pixels is H, based on the created flare correction control relation information, the horizontal synchronization signal, and the pixel clock (the horizontal pixel number from the horizontal pixel counter).
  • the correction amount is calculated individually for the left (outline from 5d to 8d) and right (outline from 0d to 3d) of the horizontal flare correction in FIG. 3A in proportion to h ⁇ H / 2) where h is the pixel number, and FIG. Above vertical flare correction ( 5H to 8H) and lower (0H to 3H) contours are calculated separately, and the oblique flare correction of FIG. 3C is performed on the oblique contours (obliquely from 0H0d to 4H + 4d and obliquely from 0H + 4d to 4H0d).
  • Means for individually calculating the correction amount based on the contour of the direction (screen position control unit 5 including the horizontal pixel counter), and means for individually calculating the correction amount (N0 to N3, N5 to N8, N10 to negative multipliers) N13, N15 to N18 and positive multipliers P0 to 8 and P10 to 18) from the imaging device, the outer edge and the inner edge in the radiation direction with overshoot and undershoot suppressed separately, and the leading edge or trailing edge of the contour individually It is possible to output a video signal in which the flare component of the coma aberration is individually corrected.
  • FIG. 5 is a schematic diagram showing signal processing of progressive scanning output according to an embodiment of the present invention.
  • (a) is a G video signal
  • (b) is a low-frequency contour component of the G video signal
  • (c) is a period of, for example, 200% or more of the rated level of the G video signal
  • (d ) Is a B (Blue) video signal
  • (e) is a period of, for example, 200% or more of the rated level of the B video signal
  • (f) is a leading edge flare correction effective period at the left end of the screen (for example, 200 B of the B video signal).
  • (G) is a period obtained by subtracting a period of 200% or more of the G video signal from the period of% or more, and (g) is a trailing edge flare correction effective period of the right end of the screen (for example, a period of nd of 200% or more of the B video signal after nd).
  • (H) is a flare correction waveform at the left and right ends of the screen (low frequency contour component of the G video signal of the leading edge flare correction effective period at the left end of the screen and the trailing edge flare correction effective period at the right end of the screen), i) is a corrected B video signal (from the B video signal) A video signal) obtained by subtracting the flare correction waveform surface margins.
  • the sequential scanning output of the single-plate image sensor can correct flare with the contents shown in FIG.
  • Embodiments of the present invention include 16: 9 and 2: 1 wide aspect 1K and 2K HDTV, 4K and 8K and other UHDTV television cameras, etc.
  • the blue spherical aberration and the apochromat lens part in which the coma aberration is not optically corrected and the type information of the lens part.
  • the lens does not optically correct the flare caused by green-red-blue chromatic aberration and green-red coma and does not optically correct blue coma (apochromat)
  • the flare caused by coma aberration at the leading edge and the trailing edge is corrected, and if red coma aberration is corrected with high accuracy, R is also set at the rated video signal level.
  • An image pickup apparatus having means for detecting a period of 200% or more and correcting flare caused by coma aberration at the leading edge and the trailing edge.
  • the high-resolution imaging apparatus acquires a lens unit in which chromatic aberration is optically corrected with red, green, and blue, and product type information, focal length information, and aperture ratio information of the lens unit. And means for acquiring and storing coma aberration information of the lens unit, the acquired lens type information, focal length information, aperture ratio information, and the stored (at least blue) coma aberration information.
  • the green contour correction amount is calculated individually (approximate blue flare) in proportion to the distance from and independently, and at least green (multi-pixel delay) horizontal contour correction (and vertical contour correction)
  • An image pickup apparatus having means for adding a contour correction signal (correction and oblique contour correction) to a blue video signal independently inside and outside.
  • the wide aspect high-resolution imaging apparatus has at least (multi-pixel delay) horizontal contour correction (with multi-pixel delay) (and vertical contour correction and diagonal contour correction), and red Means for obtaining the lens type information, focal length information, and aperture ratio information of the lens having a lens in which chromatic aberration is optically corrected in green and blue and spherical aberration and coma aberration are optically corrected in red and green; Means (CPU unit 6 and CPU unit 6) for acquiring and storing coma aberration information corresponding to the focal length and aperture ratio of the lens (in blue at apochromat, red and blue separately at the telephoto end and wide-angle end of the zoom lens).
  • a built-in or external storage unit From the coma aberration information (individually red and blue at the wide-angle end) from the coma aberration information (corresponding to the difference in the contour collapse between the outside and inside of the radiation direction due to the coma aberration of the lens) From the synchronization signal and the pixel clock (the horizontal pixel number from the horizontal pixel counter) to the distance from the screen center of the pixel corresponding to the video signal (the number of horizontal pixels is H and the horizontal pixel number is h and h ⁇ H / 2).
  • the horizontal flare correction amount corresponding to the screen position proportional to the proportion and the distance from the screen center of the pixel is calculated separately for the left (contour from 5d to 8d) and right (contour from 0d to 3d).
  • the timing of the screen position of the video signal is detected from means for individually performing the correction amount on the left (contour from 5d to 8d) and right (contour from 0d to 3d) of the horizontal flare correction, and the horizontal synchronization signal and the pixel clock.
  • Means horizontal A screen position control unit including an element counter
  • a pixel immediately before a high-brightness pixel that is equal to or higher than the first reference for example, 200% of the rated video signal level in FIG.
  • the green horizontal multi-pixel contour correction signal (approximate the blue flare) up to the pixel before the horizontal flare correction is added to the blue video signal, and the luminance of the blue video signal is higher than the first reference on the right side of the screen.
  • Means for adding the green horizontal multi-pixel contour correction signal (approximate blue flare) from the image immediately after the pixel to the pixel after horizontal flare correction to the blue video signal (FIGS. 3A, 3B, and 3C) 3A, FIG. 3B and FIG.
  • 3C subtracters (negative adders) N0 to N3 and N5 to N8 and N10 to N13 and N15 to N18 and adders P4 and P14, A 4-pixel delay unit 54 and a video level determination unit 49), The amount of correction is calculated separately for the generated screen position and the horizontal flare correction left (5d to 8d contour) and right (0d to 3d contour), and the horizontal flare correction left (5d to 8d contour) and right Means for performing individual correction amounts (outline from 0d to 3d) (pixel delay units shown in FIGS. 3A, 3B, and 3C, and subtracters (negative adders) shown in FIGS. 3A, 3B, and 3C) N0 to N3, N5 to N8, N10 to N13, N15 to N18, and adders P4 and P14).
  • FIG. 3C of the block diagram of the blue or red oblique flare correction circuit when the contour correction signal is generated by addition / subtraction of the read signal from the frame memory, the double-data-rate of the frame memory is generated.
  • SDRAM abbreviated as DDR
  • FPGA field-Programmable Gate Array
  • the number of subtractors, line memory units, and pixel delay units shown in FIG. 3 in the detailed block diagram of the contour correction circuit according to the embodiment of the present invention is not limited to seven, and is larger if the circuit scale is allowed. You can use natural numbers.
  • the number of adders, line memory units, and pixel delay units is not 7 or more, the number of adders, line memory units, and pixel delay units is preferably an even number so that the contour correction is symmetric. That is, when the contour correction is simple, the number read from the frame memory is preferably 4 or 6.
  • the imaging apparatus suppresses the blue or red color blur at the edge of the high-brightness object at the screen edge even with a lens having a large color blur due to the flare component of the blue or red coma aberration at the screen edge.
  • Video signals can be output.
  • the lateral chromatic aberration which is the difference between the centroid position of the red-blue coma aberration and the centroid position of the green coma aberration at three wavelengths, is corrected, and the spherical aberration and coma aberration are corrected at two wavelengths.
  • the present invention can be applied to an application in which only an image signal in which the color blur due to the flare component of the blue coma aberration at the edge of the high-brightness object is output from the image sensor in the center direction and in the direction away from the center.
  • the lens does not optically correct the flare caused by the green-red-blue chromatic aberration and the green-red coma and does not optically correct the blue coma (apochromat)
  • Bch is detected for a period of 200% or more. If the flare caused by the coma at the trailing edge is corrected and the coma at the red is corrected with high accuracy, the Rch can be detected for a period of 200% or more and can be applied to correct the flare caused by the coma at the leading edge and the trailing edge.
  • the contour correction inside and outside the edge of the high-brightness subject can be varied independently (to correct the outer one-way contour correction), especially 4K8K UHDTV for landscape screen
  • the present invention can be applied to an application for realizing moire reduction without using an OLPF (optical low-pass filter) by using blue as a luminance signal (in a high frequency range).
  • the color blur due to the flare component of the blue coma aberration at the edge of the high-intensity object at the wide-angle end or the telephoto end of the high-power zoom lens or general-purpose zoom lens is also electronically corrected to obtain higher resolutions such as 4K and 8K.
  • a high magnification zoom The present invention can be applied to the entire camera including a lens or a general-purpose zoom lens.
  • 1 lens (particularly high magnification zoom lens) unit
  • 2 imaging unit
  • 3 imaging device
  • 4 signal processing unit
  • 5 screen position control unit
  • 6 CPU unit
  • 53 Adder, 48, 49: Video level determination unit

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  • Color Television Image Signal Generators (AREA)

Abstract

La présente invention vise à proposer un dispositif de capture d'image apte à corriger une composante de lumière parasite dans l'aberration de coma d'une lentille, qui est un flou de couleur à un bord d'un sujet à luminance élevée, en raison de la visibilité d'un flou de couleur qui est une composante de lumière parasite dans l'aberration de coma d'une lentille dans laquelle une image formée s'élargit sous la forme d'une composante de lumière parasite vers un côté dans la direction de rayonnement de la même manière qu'une comète (coma). Ce dispositif de capture d'image à haute résolution, de grand format, est caractérisé en ce qu'il comprend : une unité de lentille dans laquelle l'aberration chromatique du vert, du rouge et du bleu, l'aberration sphérique du vert et du rouge, et l'aberration de coma sont corrigées du point de vue optique ; des moyens pour acquérir des informations de type et des informations d'ouverture de l'unité de lentille et acquérir et enregistrer des informations d'aberration de coma de l'unité de lentille ; et des moyens ayant au moins de correction de contour horizontal, les moyens ajoutant à un signal vidéo bleu, d'après les informations de type et les informations d'ouverture relative acquises et les informations d'aberration de coma enregistrées de l'unité de lentille, au moins un signal de correction de contour horizontal pour le vert, en dehors d'au moins des pixels de correction de contour horizontal de pixels de luminance élevée supérieurs ou égaux à une première référence sur la gauche d'un écran du signal vidéo bleu, immédiatement avant les pixels de luminance élevée.
PCT/JP2016/054712 2015-03-20 2016-02-18 Dispositif de capture d'image, et système de capture d'image WO2016152343A1 (fr)

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JP2018121239A (ja) * 2017-01-26 2018-08-02 株式会社日立国際電気 撮像装置及び撮像方法
WO2019058980A1 (fr) * 2017-09-25 2019-03-28 株式会社日立国際電気 Dispositif d'imagerie
WO2019058981A1 (fr) * 2017-09-25 2019-03-28 株式会社日立国際電気 Dispositif d'imagerie
CN112689082A (zh) * 2019-10-17 2021-04-20 电装波动株式会社 具备事件相机的摄像装置

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JP2009303206A (ja) * 2008-05-13 2009-12-24 Hitachi Kokusai Electric Inc 個体撮像装置及び監視システム
JP2014053700A (ja) * 2012-09-06 2014-03-20 Canon Inc 撮像及び画像処理装置および画像処理方法
WO2014112622A1 (fr) * 2013-01-21 2014-07-24 株式会社日立国際電気 Dispositif de capture d'image, et dispositif de dépôt par évaporation sous vide l'employant

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JP2009303206A (ja) * 2008-05-13 2009-12-24 Hitachi Kokusai Electric Inc 個体撮像装置及び監視システム
JP2014053700A (ja) * 2012-09-06 2014-03-20 Canon Inc 撮像及び画像処理装置および画像処理方法
WO2014112622A1 (fr) * 2013-01-21 2014-07-24 株式会社日立国際電気 Dispositif de capture d'image, et dispositif de dépôt par évaporation sous vide l'employant

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018121239A (ja) * 2017-01-26 2018-08-02 株式会社日立国際電気 撮像装置及び撮像方法
WO2019058980A1 (fr) * 2017-09-25 2019-03-28 株式会社日立国際電気 Dispositif d'imagerie
WO2019058981A1 (fr) * 2017-09-25 2019-03-28 株式会社日立国際電気 Dispositif d'imagerie
JPWO2019058981A1 (ja) * 2017-09-25 2020-10-01 株式会社日立国際電気 撮像装置
JPWO2019058980A1 (ja) * 2017-09-25 2020-10-01 株式会社日立国際電気 撮像装置
CN112689082A (zh) * 2019-10-17 2021-04-20 电装波动株式会社 具备事件相机的摄像装置

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