WO2006041049A1 - 映像信号処理装置および画像処理装置 - Google Patents
映像信号処理装置および画像処理装置 Download PDFInfo
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- WO2006041049A1 WO2006041049A1 PCT/JP2005/018676 JP2005018676W WO2006041049A1 WO 2006041049 A1 WO2006041049 A1 WO 2006041049A1 JP 2005018676 W JP2005018676 W JP 2005018676W WO 2006041049 A1 WO2006041049 A1 WO 2006041049A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/20—Circuitry for controlling amplitude response
- H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
- H04N5/208—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/20—Circuitry for controlling amplitude response
- H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
Definitions
- Video signal processing apparatus and image processing apparatus are Video signal processing apparatus and image processing apparatus
- the present invention relates to a video signal processing apparatus using an imaging device such as a CCD, which is accompanied by conversion of an image format of the video signal.
- image signals captured by a solid-state image sensor such as a CCD are digitally captured, and various image digital signal processing is performed on the digitally encoded image signals.
- image data of a predetermined image format.
- the number of pixels of the imaging element is higher than that of a general NTSC ZPAL video camera or the like in order to increase the resolution.
- An increased number of imaging devices may be used.
- An imaging apparatus such as a digital still camera which emphasizes the resolution of these still images is intended for capturing moving images in both the vertical direction and the horizontal direction, such as a video camera for NTSC ZPAL. Often more expensive than imaging devices.
- an imaging apparatus such as a single-plate video camera has a problem that the spatial sampling frequency of the color signal is as low as 1Z2 or less of the spatial frequency of the pixel of the imaging element, and aliasing occurs.
- the spatial sampling frequency of the R, G, B, and three primary color signals is the same as the spatial sampling frequency by the pixels of the imaging element, and Can be generated.
- the three-plate type video camera uses three solid-state imaging devices such as CCDs, the structure of the optical system is complicated and the cost is high compared to the single-plate method in which miniaturization is difficult.
- imaging devices such as single-plate video cameras.
- a still image pickup device aiming at high image quality
- a 3-plate camera is achieved.
- An imaging apparatus such as a single-panel video camera, which is designed to achieve high image quality, is considered.
- FIG. 13 shows a block diagram of a conventional image pickup apparatus using such an image pickup element for a still image, and will be described.
- the conventional imaging device includes an imaging element 2 that photoelectrically converts light, and an AZD conversion circuit 3 that converts an analog video signal output from the imaging element 2 into a digital video signal.
- a signal processing circuit 4 that performs signal processing such as gamma correction for a camera and generates a video signal such as NTSCZPAL, an imaging element driving unit 5 that drives the imaging element 2, and a control unit 6 that controls the imaging element driving unit 5.
- NTSCZPAL an imaging element driving unit 5 that drives the imaging element 2
- control unit 6 controls the imaging element driving unit 5.
- an imaging device driver 5 has an imaging device driving unit 5 via a control unit 6 with respect to an imaging device 2 having image data for 480 lines which is twice as large as NTSC in one field per vertical direction.
- the output of the image pickup element is generated as image data of 240 lines per field
- the image data outputted from the image pickup element 2 is converted into a digital image signal by the AZD conversion circuit 3, and it is By processing by the signal processing circuit 4, it is converted into image data conforming to the NTSC system (see, for example, Patent Document 1).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2000-308076
- the driving unit of the imaging device is driven despite the fact that high-resolution image data can be obtained using the high-pixel imaging device.
- control is performed for an analog image format such as NTSC, the number of vertical lines output from the image pickup device becomes about 240. Therefore, all effective pixels of the image pickup device are simultaneously output with analog format such as NTSC. There is a problem that it is not possible to simultaneously obtain high-quality image data using! /, Effective pixels that the imaging device originally has, and / or!
- the present invention has been made to solve such conventional problems, and an image of an imaging device is provided.
- Video signal processing that can simultaneously obtain down-converted image data such as high-quality digital image data and NTSC ZPAL that effectively use elements, and can also improve the quality of down-converted image data. It provides equipment.
- a video signal processing apparatus comprises: image data generation means for converting the video signal into image data based on effective pixels included in the video signal input from the imaging device; and the predetermined compression of the image data.
- Image compression means for compressing at a rate, an edge correction means for performing an edge correction of the image data compressed based on the edge correction gain, and outputting a corrected video signal, and a compression performed by the image compression means
- a contour correction gain calculation means for calculating the contour correction gain based on a factor.
- the video signal processing apparatus makes use of the effective pixels of the image pickup element and performs outline correction in accordance with the compression ratio. Output high quality images.
- the video signal processing apparatus further comprises luminance signal level detection means for detecting a luminance signal level of the image data compressed by the image compression means, and the contour correction gain calculation means comprises The contour correction gain may be calculated based on the luminance signal level detected by the luminance signal level detection means together with the compression rate.
- the video signal processing apparatus performs contour correction in accordance with the luminance signal level, so that correction can be performed in accordance with the luminance signal level, thereby improving SZN and reducing discomfort due to correction. It can be performed.
- the video signal processing apparatus further comprises an image frequency component detection unit for detecting a frequency component of the image data compressed by the image compression unit, and the contour correction gain calculation unit
- the contour correction gain may be calculated based on a frequency component of the image data detected by the image frequency component detection means together with a compression ratio.
- the image frequency component detection unit may calculate a low frequency luminance average value calculation unit that calculates a low frequency luminance average value of the compressed image data;
- a high frequency luminance average value calculation unit for calculating a high frequency luminance average value of image data, the low frequency luminance average value calculated by the low frequency luminance average value calculation unit, and the above calculated by the high frequency luminance average value calculation unit
- the high frequency luminance average value is compared, it is determined that the low frequency luminance average value is larger than the high frequency luminance average value, and the low frequency luminance average value falls below a predetermined low frequency luminance reference value.
- a gain control signal for reducing the correction gain is generated, the high frequency luminance average value is determined to be larger than the low frequency luminance average value, and the high frequency luminance average value is a predetermined high frequency luminance reference value.
- a gain control signal generation unit for generating a gain control signal for increasing the contour correction gain, and outputting the gain control signal to the contour correction gain calculation means. May be included.
- the video signal processing apparatus of the present invention determines that the low frequency luminance average value is determined to be larger than the high frequency luminance average value, and the low frequency luminance average value falls below a predetermined low frequency luminance reference value.
- the image data is judged to have many low frequency components and relatively smooth images, and a gain control signal for reducing the contour correction gain is output to the contour correction gain calculating means, and the high frequency luminance average value is the low frequency luminance average. If it is judged that the value is larger than the value and the high frequency luminance average value exceeds the predetermined high frequency luminance reference value, it is judged that the image data is melino and the image with li is large, and the outline correction gain is made large. Can be output to the contour correction gain calculation means, so that correction can be performed according to the frequency component. Appropriate contour correction can be performed according to the content of the image.
- the video signal processing apparatus further comprises network band detection means for detecting a band of the network to which the video signal subjected to the contour correction is transmitted, the contour correction gay.
- the contour calculating means may have a configuration characterized in that the contour correction gain is calculated based on the bandwidth of the network detected by the network bandwidth detecting means together with the compression rate.
- the video signal processing apparatus performs contour correction in accordance with the bandwidth of the network, so that correction can be performed according to the transmission condition of the video signal, and contour correction suitable for image transmission can be performed. It can be carried out.
- the video signal processing apparatus of the present invention may have a configuration characterized by including a digital image data output unit that outputs the image data generated by the image data generation unit.
- the video signal processing apparatus outputs the non-compressed video signal separately from the compressed high-quality video signal that has been appropriately contour-corrected. It is also possible to provide the user with a good video signal without losing the
- digital image luminance signal level detection means for detecting a luminance signal level of image data outputted from the digital image data output unit, and contour correction gain.
- Digital contour correction means for performing a contour correction of the image data to be output and outputting a corrected video signal; and the luminance signal level detected by the digital image luminance signal level detection means.
- Digital contour correction gain calculating means for calculating the contour correction gain on the basis of
- the video signal processing apparatus performs contour correction on the data output from the digital image data output unit according to the luminance signal level, so high-quality compressed image with contour corrected appropriately. Apart from the video signal, it is possible to realize further improvement of the SZN ratio of the non-compressed video signal to be output.
- the video signal processing apparatus of the present invention further comprises digital image frequency component detection means for detecting frequency components of the image data output from the image data output unit, and the digital image contour correction gain calculation means described above
- the contour correction gain may be calculated based on a frequency component of the image data detected by the digital image frequency component detection means together with the luminance signal level.
- the video signal processing apparatus according to the present invention performs contour correction on the data output from the digital image data output unit according to the frequency component, so that the compressed high-quality video properly contour-corrected.
- appropriate contour correction can be performed on the uncompressed video signal to be output according to the content of the image, such as whether the image is limp, merino, or lyre.
- the video signal processing apparatus further comprises digital image network band detection means for detecting a band of the network to which the video signal subjected to the contour correction is transmitted, and the digital image contour correction gain calculation means
- the contour correction gain may be calculated based on a band of the digital image network as well as a luminance signal level.
- the video signal processing apparatus of the present invention performs contour correction on the data output from the digital image data output unit according to the bandwidth of the network, so that correction according to the transmission condition of the image signal is performed. And perform contour correction suitable for image transmission.
- an image processing apparatus includes the video signal processing apparatus, and an image processing unit that performs image processing based on the video signal generated by the video signal processing apparatus. May be included.
- the image processing apparatus performs image processing using the video signal output from the video signal processing apparatus that performs contour correction, so that image processing with a clear contour can be performed.
- Image processing such as extracting an outline component of an image such as personal authentication can be performed with high accuracy.
- the effective pixels of the imaging device are activated to generate image data, and the contour correction is performed according to the compression ratio to make the most of the function of the imaging device and appropriately correct the contour. It is possible to provide a video signal processing apparatus having the effect of being able to output a high quality video.
- FIG. 1 is a block diagram of a video signal processing apparatus according to a first embodiment of the present invention.
- FIG. 2 A diagram showing the outline when the image data is simply compressed
- FIG. 4 A graph showing the relationship between the compression ratio and the contour correction gain in the contour correction gain control unit.
- FIG. 5 A diagram showing an image contour portion subjected to contour correction after image data compression.
- FIG. 6 A block diagram of a video signal processing apparatus according to the second embodiment of the present invention
- FIG. 8 A block diagram of a video signal processing apparatus according to a third embodiment of the present invention
- FIG. 11 A block diagram of a video signal processing apparatus according to the fourth embodiment of the present invention
- FIG. 12 A block diagram of an image processing apparatus according to the fifth embodiment of the present invention
- FIG. 13 Block diagram of a conventional imaging device
- FIG. 1 is a block diagram of a video signal processing apparatus according to a first embodiment of the present invention. Show and explain.
- the video signal processing apparatus 10 includes a lens 11 that collects light and performs focus adjustment, and an imaging device 12 that converts the light collected by the lens 11 into an electrical signal.
- An imaging device drive unit 13 for driving the imaging device 12; a preprocessing unit 14 for performing preprocessing for performing AZD conversion on an analog video signal output from the imaging device 12; Converts output signals into digital signals AZD transformation 15, YZC signal processing unit 16 that performs luminance signal processing and color difference signal processing on video signals output from AZD transformation 15, compression processing of video signals Image correction unit 21, an edge correction unit 22 that performs edge correction on the image signal compressed by the image compression unit 21 based on the edge correction gain, and an edge correction gain of the edge correction unit 22.
- contour correction gain control unit 23 that outputs a control signal to be controlled and the contour correction unit 22 NTSCZPAL encoder 24 that generates analog video signal s 1 of NTSCZPAL system based on the output video signal, I (interlaced) / P (progressive) conversion for the video signal output from YZC signal processing unit 16 And a digital output unit 25 for generating a digital video signal s2.
- the lens 11, the imaging device 12, the imaging device driving unit 13, the preprocessing unit 14, the AZD converter 15, and the YZC signal processing unit 16 constitute an image data generation unit.
- the preprocessing unit 14 is configured such that the CDS circuit for removing reset noise of the analog video signal output from the imaging device 12 and the analog video signal from which the noise component is removed hold a constant signal level. It consists of an AGC circuit that performs amplitude adjustment, and a clamp circuit that clamps to perform AZD conversion on an amplitude-adjusted analog video signal.
- the image compression unit 21 compresses the video signal to a predetermined image format with respect to the video signal output from the YZC signal processing unit 16, and outputs the compression ratio as a compression ratio detection signal s3. is there.
- the contour correction gain control unit 23 outputs a control signal for controlling the contour correction gain of the contour correction unit 22 based on the compression ratio detection signal s3 output from the image compression unit 21.
- the image pickup device 12 is interlace-driven by the image pickup device driving unit 13 and the down conversion processing for reducing the image format in the vertical direction will be described.
- the YZC signal processing unit 16 separates a luminance signal and a color difference signal.
- the image signal is compressed by the image compression unit 21 into a predetermined format.
- the image data is compressed to 240 lines to convert to the NTSC system. That is, the number of lines is compressed to 1Z4.
- image data after compression as compared with image data before compression, as shown in FIG. Is likely to be an image in which the image outline portion is unclear.
- the contour correction gain control unit 23 generates a signal for controlling the contour correction gain of the contour correction unit 22 according to the compression ratio of the image data based on the compression ratio detection signal s3.
- the control signal output from the contour correction unit 22 corresponds to the contour correction gain.
- the contour correction gain control unit 23 calculates the contour correction gain to be larger as the compression ratio is higher. May be calculated so that the contour correction gain is doubled.
- the contour correction unit 22 can appropriately perform contour correction on the video signal compressed by the image compression unit 21.
- the contour correction amount Y by the contour correction performed by the contour correction unit 22 is the contour correction gain calculated by the contour correction gain control unit 23 for K, a video signal obtained by delaying Z- 2 by two lines, 2
- the contour correction unit 22 performs contour correction using a digital filter represented by the following equation (1).
- contour correction amount Y K (2Z-tooth Z- 2 - 1) ⁇ ⁇ ⁇ ' formula (1)
- the contour correction amount is controlled according to the compression rate of the image data, so that appropriate contour correction can be performed. Therefore, as shown in FIG. 5, the signal output from the contour correction unit 22 can be made into good image data appropriately contour-corrected, so that it is converted to an analog video signal si by the NTSC ZPAL encoder 24 at a later stage.
- the signal to be output can be a good video signal.
- the digital video signal s2 output from the digital output unit 25 since the digital video signal s2 output from the digital output unit 25 is not compressed, the image data without resolution deterioration utilizing the effective pixels of the image sensor 12 should be output. Can be added to the output of the digital output unit 25 By providing an edge correction unit for tar output and performing edge correction, image data with higher sharpness can be obtained. Therefore, both the analog output and the digital output can generate a good video signal.
- control of the amount of contour correction in the vertical direction can be similarly controlled even in the force horizontal direction described above.
- FIG. 1 a block diagram of a video signal processing apparatus according to a second embodiment of the present invention is shown in FIG.
- a configuration similar to the configuration of video signal processing device 10 (see FIG. 1) according to the first embodiment is the video signal processing.
- the same reference numerals as in the configuration of the apparatus 10 are given and the detailed description is omitted.
- the video signal processing apparatus 30 includes a lens 11, an imaging element 12, an imaging element driver 13, a preprocessing unit 14, and an AZD converter 15. , Y / C signal processing unit 16, image compression unit 21, contour correction gain control unit 23, NTSC ZPAL encoder 14, digital output unit 25, and image compression unit 21 compressed into a predetermined image format
- a contour correction unit 31 that performs contour correction on a video signal
- a luminance signal level detection control unit 32 that calculates the luminance level of the video signal output from the image compression unit 21 and controls the output level
- a weighting unit 33 that calculates and outputs an outline correction gain of
- the contour correction unit 31 is based on the contour correction gain K1 output from the weighting unit 33. Then, the contour correction of the video signal output from the image compression unit 21 is performed.
- the weighting unit 33 outputs the contour correction unit 31 by the control signal K output from the contour correction gain control unit 23 and the control signal G output from the luminance signal level detection control unit 32.
- the contour correction gain K1 is calculated.
- the luminance signal level detection control unit 32 calculates the luminance level of the video signal output from the image compression unit 21, and as shown in FIG. Control is performed to lower the output level in the high luminance range where the luminance level is high, and to control the output level to be constant in the middle level.
- the weighting unit 33 not only the control signal K determined by the contour correction gain control unit 23 but also the compression ratio detection signal s3 and the luminance signal level detection determined by the luminance signal level detection control unit 32.
- the contour correction gain K1 is calculated in consideration of the signal G as well.
- the weighting unit 33 follows the control signal ( ⁇ ) output from the contour correction gain control unit 23 and the luminance signal level detection signal (G) output from the luminance signal level detection control unit 32.
- the contour correction unit 31 is controlled by outputting the calculated contour correction gain (K1).
- the contour correction gain K1 output from the weighting unit 33 is
- the contour correction amount ⁇ is calculated as in the following equation (3) by substituting K1 for the contour correction unit 31 instead of ⁇ in equation (1).
- the analog video signal si to be output has the luminance change and the compression ratio of the image data. It can be a video signal with less SZN degradation that follows.
- the image data is output without resolution deterioration utilizing the effective pixels of the image sensor 12. be able to.
- control of the contour correction amount can be similarly performed even in the horizontal direction described in the control of the contour correction amount in the vertical direction.
- FIG. 8 a block diagram of a video signal processing apparatus according to a third embodiment of the present invention is shown in FIG. 8 and will be described.
- the configuration of video signal processing apparatus 30 according to the second embodiment is the same as that of video signal processing apparatus 30 according to the second embodiment (see FIG. 6).
- the same reference numerals as in the configuration are given and the detailed description is omitted.
- a video signal processing apparatus 40 includes a lens 11, an imaging element 12, an imaging element driving unit 13, a preprocessing unit 14, and an AZD converter 15. , Y / C signal processing unit 16, image compression unit 21, contour correction gain control unit 23, NTSC ZPAL encoder 1, digital output unit 25, luminance signal level detection control unit 32, and image compression unit 21.
- a contour correction unit 41 that performs contour correction on a video signal compressed into a predetermined image format, a video signal band detection unit 42 that detects frequency components of the video signal compressed by the image compression unit 21, and a contour correction unit A weighting unit 43 for calculating the contour correction gain of 41, and a contour correction unit 51 for performing contour correction on the video signal output from the digital output unit 25; And a luminance signal level detection control unit 52 that calculates the luminance level of the video signal output from the digital output unit 25 and controls the output level, and an image that detects frequency components of the video signal output from the digital output unit 25.
- a signal band detection unit 53 and a weighting unit 54 for calculating the contour correction gain of the contour correction unit 51 are provided.
- the contour correction unit 41 uses the contour correction gain K1 output from the weighting unit 43. It is controlled.
- the weighting unit 43 includes a control signal K output from the contour correction gain control unit 23, a luminance signal level detection signal G output from the luminance signal level detection control unit 32, and a video signal band detection unit 42.
- the contour correction gain K1 to be outputted to the contour correction unit 41 is calculated by the control signal S outputted from the above.
- the contour correction unit 51 is controlled by the contour correction gain K2 output from the weighting unit 54, and performs contour correction on the video signal output from the digital output unit 25.
- the weighting unit 54 outputs the luminance signal level detection signal G2 output from the luminance signal level detection control unit 52 and the control signal S2 output from the video signal band detection unit 53 to the contour correction unit 51.
- the contour correction gain K2 is calculated.
- video signal band detection unit 42 detects the frequency component of the video signal output from image compression unit 21 and outputs control signal S in accordance with the detected frequency component of the video signal. Do. Then, in the weighting unit 43, in addition to the control signal K output from the contour correction gain control unit 23 and the luminance signal level detection signal G output from the luminance signal level detection control unit 32, the video signal band detection unit 42 The contour correction gain K1 is also calculated by the control signal S output from the controller.
- FIG. 9 a configuration example of the video signal band detection unit 42 is shown in FIG. 9 and will be described.
- the video signal band detection unit 42 calculates a luminance average value for one screen based on a BPF (band pass filter) 61 for low frequency components of image data and its output.
- the luminance average value calculation unit 62 for frequency, the BPF for high frequency components of image data (band pass filter 1) 63, and the luminance average value calculation unit 64 for high frequency that calculates the average luminance value for one screen based on the output.
- the low frequency luminance average value calculation unit 62 and the high frequency luminance average value calculation unit 64 is also performs gain control based on the output value.
- the gain control unit 65 the low frequency luminance average value output from the low frequency luminance average value calculation unit 62 and the high frequency luminance average value calculation unit 64 are output. Compare with the high frequency luminance average value.
- the low frequency luminance average value is large, it is further compared with the low frequency gain control reference value, and as a result, the low frequency luminance average value output from the low frequency luminance average value calculation unit 62 If it is determined that is low, it is determined that the image data has many low frequency components and many relatively smooth pixels, and control is performed so that the control signal output from the gain control unit 65 becomes small.
- the high frequency luminance average value is large, it is compared with the high frequency gain control reference value, and as a result, the high frequency luminance average value output from the high frequency luminance average value calculation unit 64 is If it is determined that the image data is high, it is determined that the image data has many pixels with Merino and Li, and control is performed so that the control signal output from the gain control unit 65 becomes large.
- control signal S output from the video signal band detection unit 42 is output to the weighting unit 43, and the luminance signal level detection signal G output from the luminance signal level detection control unit 32 and the contour correction gain control
- the weighting unit 43 calculates the contour correction gain K1 so that the contour correction unit 41 can execute the contour correction following the control signal K output from the unit 23.
- the contour correction gain K1 output from the weighting unit 43 may be calculated as in the following formula (4).
- K1 KX G X S '"' equation (4)
- the video signal output from the contour correction unit 41 can be a video signal subjected to contour correction control that follows the compression ratio of the image data, the luminance signal level, and the band of the video signal.
- the analog video signal output from the NTSC ZPAL encoder 24 can be a good video signal with less SZN degradation, for which appropriate contour correction has been performed. Further, also in the case where contour correction is performed in the subsequent stage of the digital output unit 25, similarly, control based on the luminance level of the video signal and the band component of the video signal can be performed.
- a luminance signal level detection having the same function as the luminance signal level detection control unit 32 for detecting the luminance level of the digital video signal output from the digital output unit 25 and generating the luminance signal level detection signal G2
- a video signal band having the same function as the control unit 52 and a video signal band detection unit 42 that generates a control signal S2 that detects the band component of the video signal output from the digital output unit 25 and controls the contour correction gain. If the detection unit 53 is provided, the weighting unit 54 can calculate the contour correction gain K2 of the contour correction unit 51 in the same manner as the weighting unit 43.
- control signal S2 output from video signal band detection unit 53, luminance signal level detection signal G2 output from luminance signal level detection control unit 52, and contour correction gain K2 output from weighting unit 54.
- the weighting unit 54 can calculate the contour correction gain K2 as expressed by the following equation (5).
- the video signal output from the contour correction unit 51 can be a video signal subjected to contour correction control following the luminance signal level and the band of the video signal, appropriate contour correction is performed. It is possible to make a good video signal with less SZN degradation.
- contour correction amount in the vertical direction has been described, but the same can be applied to the horizontal direction, and the video signal band detection unit 42 and the video signal band detection unit 53 may be operated in the same manner. If the video signal is further subdivided and contour correction control is performed for each band, contour correction based on the band of the video signal can be performed more appropriately.
- FIG. 11 a block diagram of a video signal processing apparatus according to a fourth embodiment of the present invention is shown in FIG. 11 and will be described.
- the configuration similar to that of video signal processing apparatus 40 (see FIG. 8) according to the third embodiment is the video signal processing.
- the same reference numerals as in the configuration of the device 40 are given and the detailed description is omitted.
- a video signal processing apparatus 70 includes a lens 11, an imaging element 12, an imaging element driving unit 13, a preprocessing unit 14, and an AZD converter 15. , Y / C signal processing unit 16, image compression unit 21, contour correction gain control unit 23, NTSC ZPAL encoder 24, digital output unit 25, luminance signal level detection control unit 32, contour correction unit 41, Image signal band detection unit 42, weighting unit 43, luminance signal level detection control unit 52, video signal band detection unit 53, and contour correction for performing contour correction on the video signal output from the digital output unit 25 A network IZF control unit 72 that controls the interface between the unit 71 and a network that transmits the video signal generated by the video signal processing device 70 to the outside and detects the band of this network, and the contour correction gain of the contour correction unit 71 Weighting unit to calculate 73 And have.
- the contour correction unit 71 differs in accordance with the contour correction gain K2 output from the weighting unit 73. It is controlled.
- the network IZF control unit 72 detects a band of the connected network and calculates a control signal T to be output to the weighting unit 73 according to the band.
- the weighting unit 73 outputs the luminance signal level detection signal G2 output from the luminance signal level detection control unit 52, the control signal S2 output from the video signal band detection unit 53, and the network IZF control unit 72.
- the contour correction gain K2 to be output to the contour correction unit 71 is calculated by the control signal T.
- network IZF control section 72 outputs control signal T in accordance with the bandwidth of the network connected in the latter stage, and weighting section 73 corrects the contour by using control signal T.
- Contour correction gain K2 to be output to unit 71 is calculated. [0102] For example, if the bandwidth of the downstream network is about 6 Mbps, 3M, which is in the middle, is
- Control is performed to intensify the contour correction component in the band near Hz.
- control signal S2 output from video signal band detection unit 53, luminance signal level detection signal G2 output from luminance signal level detection control unit 52, control signal output from network IZF control unit 72.
- the weighting unit 73 calculates the contour correction gain K2 as expressed by the following equation (6).
- the contour correction unit 71 can perform contour correction control that follows the luminance level, the band component of the luminance signal, and the bandwidth of the network, the image signal output from the contour correction unit 71 is appropriate. It is possible to make a good video signal subjected to contour correction.
- the video signal output from the network IZF control unit 72 can also be a good video signal with little SZN degradation, for which contour correction has been appropriately performed.
- control of the contour correction amount can be similarly performed even in the horizontal direction described in the control of the contour correction amount in the vertical direction.
- FIG. 12 a block diagram of an image processing apparatus according to a fifth embodiment of the present invention is shown in FIG. 12 and will be described.
- the configuration similar to the configuration of the video signal processing device 70 (see FIG. 11) in the fourth embodiment is the video signal processing.
- the same reference numerals as in the configuration of the device 70 are given and the detailed description is omitted.
- the image processing apparatus 80 according to the present embodiment includes a lens 11, an imaging device 12, an imaging device driving unit 13, a preprocessing unit 14, and an AZD converter 15.
- Y / C signal processing unit 16 image compression unit 21, contour correction gain control unit 23, NTSC Z PAL encoder 24, digital output unit 25, luminance signal level detection control unit 32, contour correction unit 41, Video signal band detection unit 42, weighting unit 43, luminance signal level detection control unit 52, video signal band detection unit 53, contour correction unit 71, network IZF control unit 72, weighting unit 73, NTSC ZPAL
- the video signal output from the encoder 24 or the network IZF control unit 72 is input, and an image processing unit 81 that performs image processing is provided.
- the image data compressed by the contour correction unit 41 is corrected and output to the NTSC ZPAL encoder 24 and compressed by the contour correction unit 71.
- the image data is corrected and output to the network IZF control unit 72.
- the video signal processing apparatus has the effect of being able to output a high-quality video that has been contour-corrected appropriately, making the most of the function of the imaging device. It is useful as a video signal processing device etc. with conversion of the image format of the video signal
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Application Number | Priority Date | Filing Date | Title |
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JP2006540927A JP4717004B2 (ja) | 2004-10-13 | 2005-10-11 | 映像信号処理装置および画像処理装置 |
US11/568,775 US7750945B2 (en) | 2004-10-13 | 2005-10-11 | Video signal processing device and image processing device |
EP05793703A EP1802100A4 (en) | 2004-10-13 | 2005-10-11 | VIDEO SIGNAL PROCESSING DEVICE AND IMAGE PROCESSING DEVICE |
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PCT/JP2005/018676 WO2006041049A1 (ja) | 2004-10-13 | 2005-10-11 | 映像信号処理装置および画像処理装置 |
Country Status (5)
Country | Link |
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US (1) | US7750945B2 (ja) |
EP (1) | EP1802100A4 (ja) |
JP (1) | JP4717004B2 (ja) |
CN (1) | CN100488232C (ja) |
WO (1) | WO2006041049A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009021905A (ja) * | 2007-07-13 | 2009-01-29 | Hoya Corp | 輪郭強調装置 |
JP2011254214A (ja) * | 2010-06-01 | 2011-12-15 | Hoya Corp | 輪郭強調装置 |
US8237867B2 (en) | 2006-07-27 | 2012-08-07 | Samsung Electronics Co., Ltd. | Dynamic gain adjustment method based on brightness and apparatus thereof |
Families Citing this family (6)
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KR20100028247A (ko) * | 2008-09-04 | 2010-03-12 | 엘지전자 주식회사 | 영상 표시 기기의 명암 보정 장치 및 방법 |
CN102880712B (zh) * | 2012-10-08 | 2015-07-22 | 合一网络技术(北京)有限公司 | 一种用于对搜索的网络视频进行排序的方法和*** |
US9478004B2 (en) * | 2013-04-11 | 2016-10-25 | John Balestrieri | Method and system for analog/digital image simplification and stylization |
CN104703028B (zh) * | 2013-12-10 | 2017-09-12 | 深圳市朗驰欣创科技有限公司 | 一种视频帧纠正方法、装置及*** |
JP6696361B2 (ja) * | 2016-08-31 | 2020-05-20 | コニカミノルタ株式会社 | 画像処理装置、画像形成装置及びプログラム |
CN111372008B (zh) * | 2020-03-13 | 2021-06-25 | 深圳市睿联技术股份有限公司 | 基于视频内容的亮度自动增益调节方法及摄像机 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0330579A (ja) | 1989-06-28 | 1991-02-08 | Hitachi Ltd | 輪郭補正回路 |
JPH0423572A (ja) | 1990-05-18 | 1992-01-27 | Hitachi Ltd | ビデオカメラ |
EP0477884A2 (en) | 1990-09-26 | 1992-04-01 | Matsushita Electric Industrial Co., Ltd. | Horizontal line interpolation circuit and image pickup apparatus including it |
JPH11122511A (ja) | 1997-10-14 | 1999-04-30 | Sharp Corp | 画質補正回路 |
EP1011264A1 (en) | 1997-07-25 | 2000-06-21 | Fujitsu General Limited | Contour emphasizing circuit |
JP2000308076A (ja) | 1999-04-26 | 2000-11-02 | Hitachi Ltd | 撮像装置 |
JP2001024975A (ja) * | 1999-07-06 | 2001-01-26 | Canon Inc | 撮像装置 |
JP2002077724A (ja) | 2000-09-04 | 2002-03-15 | Hitachi Ltd | 画像の縮小表示方法及びその装置 |
JP2002077667A (ja) * | 2000-08-29 | 2002-03-15 | Mitsubishi Electric Corp | 輝度信号エンハンサ |
WO2002037835A2 (en) | 2000-11-06 | 2002-05-10 | Koninklijke Philips Electronics N.V. | Adaptive clipping prevention for picture sharpness enhancement |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR940007160B1 (ko) * | 1991-06-27 | 1994-08-06 | 삼성전자 주식회사 | 동적용 주파수 중첩방법 및 장치 |
US5374995A (en) * | 1993-03-22 | 1994-12-20 | Eastman Kodak Company | Method and apparatus for enhancing sharpness of a sequence of images subject to continuous zoom |
JP2000050141A (ja) * | 1998-07-30 | 2000-02-18 | Minolta Co Ltd | デジタルカメラ |
JP4305598B2 (ja) * | 2000-06-05 | 2009-07-29 | 富士フイルム株式会社 | カメラの絞り制御方法及び装置、並びにカメラ |
JP2002077591A (ja) * | 2000-09-05 | 2002-03-15 | Minolta Co Ltd | 画像処理装置および撮像装置 |
JP3959741B2 (ja) * | 2003-03-19 | 2007-08-15 | ソニー株式会社 | 撮像装置及び画像の輪郭強調方法 |
-
2005
- 2005-10-11 WO PCT/JP2005/018676 patent/WO2006041049A1/ja active Application Filing
- 2005-10-11 CN CNB2005800186512A patent/CN100488232C/zh not_active Expired - Fee Related
- 2005-10-11 JP JP2006540927A patent/JP4717004B2/ja not_active Expired - Fee Related
- 2005-10-11 US US11/568,775 patent/US7750945B2/en not_active Expired - Fee Related
- 2005-10-11 EP EP05793703A patent/EP1802100A4/en not_active Withdrawn
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0330579A (ja) | 1989-06-28 | 1991-02-08 | Hitachi Ltd | 輪郭補正回路 |
JPH0423572A (ja) | 1990-05-18 | 1992-01-27 | Hitachi Ltd | ビデオカメラ |
EP0477884A2 (en) | 1990-09-26 | 1992-04-01 | Matsushita Electric Industrial Co., Ltd. | Horizontal line interpolation circuit and image pickup apparatus including it |
EP1011264A1 (en) | 1997-07-25 | 2000-06-21 | Fujitsu General Limited | Contour emphasizing circuit |
JPH11122511A (ja) | 1997-10-14 | 1999-04-30 | Sharp Corp | 画質補正回路 |
JP2000308076A (ja) | 1999-04-26 | 2000-11-02 | Hitachi Ltd | 撮像装置 |
JP2001024975A (ja) * | 1999-07-06 | 2001-01-26 | Canon Inc | 撮像装置 |
JP2002077667A (ja) * | 2000-08-29 | 2002-03-15 | Mitsubishi Electric Corp | 輝度信号エンハンサ |
JP2002077724A (ja) | 2000-09-04 | 2002-03-15 | Hitachi Ltd | 画像の縮小表示方法及びその装置 |
WO2002037835A2 (en) | 2000-11-06 | 2002-05-10 | Koninklijke Philips Electronics N.V. | Adaptive clipping prevention for picture sharpness enhancement |
Non-Patent Citations (1)
Title |
---|
See also references of EP1802100A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8237867B2 (en) | 2006-07-27 | 2012-08-07 | Samsung Electronics Co., Ltd. | Dynamic gain adjustment method based on brightness and apparatus thereof |
JP2009021905A (ja) * | 2007-07-13 | 2009-01-29 | Hoya Corp | 輪郭強調装置 |
US8170362B2 (en) | 2007-07-13 | 2012-05-01 | Hoya Corporation | Edge-enhancement device and edge-enhancement method |
JP2011254214A (ja) * | 2010-06-01 | 2011-12-15 | Hoya Corp | 輪郭強調装置 |
Also Published As
Publication number | Publication date |
---|---|
US20070222866A1 (en) | 2007-09-27 |
EP1802100A1 (en) | 2007-06-27 |
JP4717004B2 (ja) | 2011-07-06 |
CN1965571A (zh) | 2007-05-16 |
CN100488232C (zh) | 2009-05-13 |
US7750945B2 (en) | 2010-07-06 |
EP1802100A4 (en) | 2009-08-26 |
JPWO2006041049A1 (ja) | 2008-05-15 |
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