WO2015104969A1 - 映像信号処理装置、映像信号処理方法およびカメラ装置 - Google Patents
映像信号処理装置、映像信号処理方法およびカメラ装置 Download PDFInfo
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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
- H04N23/95—Computational photography systems, e.g. light-field imaging systems
- H04N23/951—Computational photography systems, e.g. light-field imaging systems by using two or more images to influence resolution, frame rate or aspect ratio
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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
- H04N5/142—Edging; Contouring
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10016—Video; Image sequence
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0127—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter
Definitions
- the present technology relates to a video signal processing device, a video signal processing method, and a camera device, and more particularly, to a video signal processing device that processes a high frame rate video signal.
- a camera device capable of high frame rate imaging has been proposed (for example, see Patent Document 1).
- a high frame rate video signal is converted into a standard frame rate video signal (standard speed video signal) to obtain a video signal for viewfinder display.
- an edge signal high frequency component extracted from a video signal for viewfinder display is highlighted as an index (marker) for assisting the operation.
- Functions PAKING function, VF-DETAIL function, etc.
- the change (edge) of the signal level is steep in the focused portion, it is possible to confirm whether the focus is achieved by looking at the highlighted edge.
- the purpose of this technology is to make it easy to check whether the moving part is in focus.
- the concept of this technology is An edge signal for detecting an edge signal by subjecting a video signal having a second frame rate N times the first frame rate (N is an integer equal to or greater than 2) to high-pass filtering in the horizontal direction and the vertical direction for each frame.
- the video signal processing procedure includes an edge signal generation unit that generates an edge signal corresponding to each frame of the first frame rate based on the edge signal of each frame detected by the edge signal detection unit.
- the edge signal detection unit performs high-pass filter processing in a horizontal direction and a vertical direction for each frame on a video signal having a second frame rate that is N times the first frame rate (N is an integer of 2 or more). And an edge signal is detected. Then, the edge signal generation unit generates an edge signal corresponding to each frame of the first frame rate based on the edge signal of each frame detected by the edge signal detection unit.
- the second frame rate may be 200 Hz or higher.
- the edge signal generation unit performs an arithmetic process for obtaining the absolute value of the difference between the edge signals for each frame using the edge signal of each frame detected by the edge signal detection unit.
- the edge signal for one frame may be generated for every N frames from the absolute value of the difference between the edge signals of some or all of the frames.
- the edge signal generation unit generates an edge signal for one frame from the edge signal of a part or all of the frames for every N frames, using the edge signal of each frame detected by the edge signal detection unit. You may be like.
- the edge corresponding to each frame of the first frame rate (normal frame rate) based on the edge signal detected in each frame of the video signal of the second frame rate (high frame rate).
- a signal is generated. Therefore, for example, the influence of moving image blur can be suppressed, and an edge signal corresponding to the edge of the moving part can be favorably obtained as the edge signal corresponding to each frame of the first frame rate.
- a color conversion unit that converts the edge signal of each frame generated by the edge signal generation unit into a color signal of a predetermined color and outputs the color signal may be further provided.
- the edge emphasis display using the edge signal can be performed in a predetermined color.
- a frame rate converter that obtains a video signal of the first frame rate from an imaged video signal of a second frame rate that is N times the first frame rate (N is an integer equal to or greater than 2);
- An edge signal detection unit for detecting an edge signal by performing horizontal and vertical high-pass filtering on the captured video signal of the second frame rate for each frame;
- An edge signal generation unit that generates an edge signal corresponding to each frame of the first frame rate based on an edge signal of each frame detected by the edge signal detection unit;
- the video signal having the first frame rate obtained by the frame rate conversion unit is combined with the edge signal corresponding to each frame having the first frame rate generated by the edge signal generation unit, and the first signal is generated.
- a camera apparatus includes a signal synthesis unit that obtains a video signal for frame rate viewfinder display.
- the frame rate conversion unit obtains a video signal having the first frame rate from the captured video signal having the second frame rate that is N times the first frame rate (N is an integer of 2 or more).
- N is an integer of 2 or more.
- the second frame rate may be 200 Hz or higher.
- the edge signal detection unit detects the edge signal by performing high-pass filter processing in the horizontal direction and the vertical direction for each frame on the imaged video signal of the second frame rate.
- the edge signal generation unit generates an edge signal corresponding to each frame of the first frame rate based on the edge signal of each frame detected by the edge signal detection unit.
- the edge signal generation unit performs an arithmetic process for obtaining an absolute difference value of the edge signal between adjacent frames for each frame using the edge signal of each frame detected by the edge signal detection unit, and N
- an edge signal for one frame may be generated from an absolute difference value of edge signals of some or all of the frames.
- the edge signal generation unit generates an edge signal for one frame from the edge signal of a part or all of the frames for every N frames, using the edge signal of each frame detected by the edge signal detection unit. You may be like.
- An edge signal corresponding to each frame of the first frame rate generated by the edge signal generation unit is combined with the video signal of the first frame rate obtained by the frame rate conversion unit by the signal synthesis unit, A video signal for viewfinder display at a frame rate of 1 is obtained.
- the edge corresponding to each frame of the first frame rate (normal frame rate) based on the edge signal detected in each frame of the video signal of the second frame rate (high frame rate).
- a signal is generated, and this edge signal is combined with a video signal of a first frame rate to obtain a video signal for viewfinder display. Therefore, for example, the influence of moving image blur can be suppressed, the edge signal of the moving part can be obtained well as the edge signal corresponding to each frame of the first frame rate, and the edge emphasis display by the edge signal is also applied to the moving part. Can be performed satisfactorily.
- the present technology further includes, for example, a color conversion unit that converts the edge signal of each frame generated by the edge signal generation unit into a color signal of a predetermined color and outputs the signal
- the signal synthesis unit is a frame rate conversion unit.
- the viewfinder display of the first frame rate by combining the obtained video signal of the first frame rate with a color signal of a predetermined color corresponding to each frame of the first frame rate output from the color converter.
- the video signal may be obtained.
- the color conversion unit may determine the predetermined color based on a selection signal from the user operation unit.
- the edge information display by the edge signal can be performed with a predetermined color selected by the user, for example.
- a frame rate converter that obtains a video signal of the first frame rate from an imaged video signal of a second frame rate that is N times the first frame rate (N is an integer equal to or greater than 2);
- a first edge signal detection unit for detecting an edge signal by performing horizontal and vertical high-pass filtering on the captured video signal of the second frame rate for each frame;
- An edge signal generation unit that generates a first edge signal corresponding to each frame of the first frame rate based on an edge signal of each frame detected by the first edge signal detection unit;
- the video signal having the first frame rate obtained by the frame rate conversion unit is subjected to high-pass filter processing in the horizontal direction and the vertical direction for each frame, and the second corresponding to each frame having the first frame rate.
- a second edge signal detector for detecting the edge signal of The video signal having the first frame rate obtained by the frame rate converter is added to the first edge signal generated by the edge signal generator and the second edge signal detected by the second edge signal detector.
- Signal processing for outputting a video signal for viewfinder display at the first frame rate by combining two edge signals or a third edge signal obtained by combining the first edge signal and the second edge signal It is in a camera device comprising a unit.
- the frame rate conversion unit obtains a video signal having the first frame rate from the captured video signal having the second frame rate that is N times the first frame rate (N is an integer of 2 or more).
- N is an integer of 2 or more.
- the second frame rate may be 200 Hz or higher.
- the first edge signal detection unit detects the edge signal by performing high-pass filter processing in the horizontal direction and the vertical direction for each frame on the captured video signal at the second frame rate.
- the edge signal generation unit generates a first edge signal corresponding to each frame of the first frame rate based on the edge signal of each frame detected by the first edge signal detection unit.
- the second edge signal detection unit performs high-pass filter processing in the horizontal direction and the vertical direction for each frame on the video signal having the first frame rate obtained by the frame rate conversion unit. A second edge signal corresponding to each frame is detected.
- the signal processing unit adds the first edge signal, the second edge signal, or the first edge signal and the second edge signal to the video signal of the first frame rate obtained by the frame rate conversion unit.
- the signal processing unit may selectively output one of the first edge signal, the second edge signal, and the third edge signal based on the selection signal from the user operation unit. Good.
- a video signal for viewfinder display at the first frame rate is output. Therefore, it is possible to display on the viewfinder an image in which edge enhancement display using an edge signal is performed only on the moving part, only the stationary part, or both the moving part and the stationary part.
- FIG. 1 shows a configuration example of a camera device 100 as an embodiment.
- the camera device 100 includes a control unit 101, a user operation unit 102, an imaging unit 103, a frame rate conversion unit 104, an edge signal detection unit 105, an edge signal detection unit 106, an edge signal generation unit 107, and a VF.
- a signal processing unit 108 is included.
- Control unit (camera CPU) 101 controls the operation of each unit of camera device 100.
- the user operation unit 102 is connected to the control unit 101 and constitutes a user interface for the user to perform various operations.
- the imaging unit 103 has an image sensor such as a CMOS (Complementary Metal-Oxide Semiconductor) or a CCD (Charge Coupled Devices), and outputs an HFR video signal (high frame rate video signal).
- the HFR video signal is sent to the main line signal processing unit.
- the frame rate of the HFR video signal is N times (N is an integer of 2 or more) the frame rate of the standard speed video signal (standard frame rate video signal). In this embodiment, it is assumed that the frame rate of the standard speed video signal is 60 Hz and the frame rate of the HFR video signal is 240 Hz, which is four times as high.
- the frame rate conversion unit 104 is composed of, for example, a frame memory, and obtains a standard speed video signal with a frame rate of 60 Hz from an HFR video signal with a frame rate of 240 Hz. In this case, the frame rate conversion unit 104 adds 4 frames of video signals for every 4 frames of the HFR video signal to generate one frame of the standard speed video signal. It should be noted that every four frames of the HFR video signal do not use all the four frames of video signals to obtain one frame of standard speed video signals, but use three frames, two frames, or one frame of video signals. It is also conceivable to obtain one frame of a standard speed video signal.
- FIG. 2 (a1) to (a4) show an example of an image for four frames by the HFR video signal output from the imaging unit 103.
- FIG. In this figure, “person” constitutes a moving part, and “cylinder” constitutes a stationary part.
- FIG. 2B shows an example of an image for one frame based on the standard speed video signal obtained by the frame rate conversion unit 104. In this example, four frames of video signals are added every four frames of the HFR video signal to generate one frame of a standard speed video signal.
- the edge signal detection unit 105 performs a high-pass filter process in the horizontal direction and the vertical direction for each frame on the standard-speed video signal having a frame rate of 60 Hz obtained by the frame rate conversion unit 104 to obtain a frame rate of 60 Hz.
- the edge signal corresponding to each frame is detected.
- FIG. 3A shows an example of an edge signal for one frame detected by the edge signal detection unit 105.
- This example shows a case where the focus point is in the vicinity of the stationary portion of the “cylinder” on the near side, and an edge signal corresponding to the edge of this “cylinder” is detected (see arrow P1). However, since “person” is a moving part, moving image blur occurs, and an edge signal corresponding to the edge of this “person” is not detected.
- the edge signal detection unit 106 performs high-pass filter processing in the horizontal direction and the vertical direction for each frame on the HFR video signal output from the imaging unit 103 and having a frame rate of 240 Hz, so that each frame having a frame rate of 240 Hz is obtained.
- the edge signal corresponding to is detected.
- FIGS. 3B1 to 3B4 show an example of edge signals for four frames detected by the edge signal detector 106.
- FIG. 4A shows a state in which edge signals for four frames detected by the edge signal detector 106 shown in FIGS. 3B1 to 3B4 are added. 3 (a), (b1) to (b4), and FIG. 4 (a), “cylinder” and “person” are represented for reference of the detection position of the edge signal (difference absolute value). Has been.
- the edge signal generation unit 107 uses the edge signal of each frame detected by the edge signal detection unit 106 to perform calculation processing for obtaining an absolute difference value of the edge signal between adjacent frames for each frame. By taking the difference absolute value in this way, the edge signal corresponding to the edge of the stationary portion can be canceled and removed.
- FIGS. 4 (b1) to 4 (b4) show an example of absolute difference values for four frames generated by the edge signal generation unit 107.
- FIG. As shown in the figure, the edge signal corresponding to the edge of the “cylindrical” that is the stationary part is removed, and only the edge signal corresponding to the edge of the “person” that is the moving part remains (arrows Q1 ′, Q2 ′, Q3 ′). reference).
- FIGS. 4B1 to 4B4 “cylinder” and “person” are shown for reference of the detection position of the edge signal (difference absolute value).
- the edge signal generation unit 107 adds an absolute value of the difference of 4 frames every 4 frames, and generates an edge signal corresponding to each frame of a frame rate of 60 Hz. Instead of generating an edge signal for one frame by using all the absolute difference values of four frames every four frames, the absolute value of the difference of three frames, two frames, or one frame is used for one frame. It is also conceivable to generate an edge signal.
- the VF signal processing unit 108 synthesizes an edge signal corresponding to each frame of the 60 Hz frame rate generated by the edge signal generation unit 107 with the standard speed video signal of the 60 Hz frame rate obtained by the frame rate conversion unit 104. Then, a first video signal for viewfinder display is generated. In this case, the VF signal processing unit 108 synthesizes the edge signal with the video signal so that the edge is highlighted (for example, high luminance display, predetermined color display including white).
- the VF signal processing unit 108 converts the edge signal into a color signal of a predetermined color, and then synthesizes the image signal.
- the VF signal processing unit 108 determines a predetermined color based on the selection signal from the user operation unit 102. In other words, the user can set the predetermined color to a desired color by operating the user operation unit 102.
- the VF signal processing unit 108 adds the edge signal corresponding to each frame of the 60 Hz frame rate detected by the edge signal detection unit 105 to the standard speed video signal of the 60 Hz frame rate obtained by the frame rate conversion unit 104. Are combined to generate a second video signal for viewfinder display. In this case, the VF signal processing unit 108 synthesizes the edge signal with the video signal so that the edge is highlighted (for example, high luminance display, predetermined color display including white).
- the VF signal processing unit 108 adds the edge signal corresponding to each frame of the 60 Hz frame rate generated by the edge signal generation unit 107 to the standard speed video signal of the 60 Hz frame rate obtained by the frame rate conversion unit 104.
- the first edge signal and the edge signal (second edge signal) corresponding to each frame of the frame rate of 60 Hz detected by the edge signal detection unit 105 are combined to generate a viewfinder display first image. 3 video signals are generated.
- the VF signal processing unit 108 synthesizes the edge signal with the video signal so that the edge is highlighted (for example, high luminance display, predetermined color display including white). For example, when displaying edges in a predetermined color, the VF signal processing unit 108 can distinguish between edge enhancement display using the first edge signal and edge enhancement display using the second edge signal by changing the hue. .
- the VF signal processing unit 108 outputs any of the first video signal, the second video signal, and the third video signal described above, and sends them to the VF display unit (viewfinder).
- the VF signal processing unit 108 determines a video signal for viewfinder display to be output based on the selection signal from the user operation unit 102. That is, the user can set a video signal for viewfinder display to be sent to the VF display unit (viewfinder) by operating the user operation unit 102.
- An HFR video signal having a frame rate of 240 Hz is obtained from the imaging unit 103 (see FIGS. 2 (a1) to (a4)).
- the HFR video signal is sent to the main line signal processing unit and is also supplied to the frame rate conversion unit 104 and the edge signal detection unit 106.
- the frame rate conversion unit 104 performs a frame rate conversion process, and obtains a standard speed video signal with a frame rate of 60 Hz from an HFR video signal with a frame rate of 240 Hz (see FIG. 2B). This standard speed video signal is supplied to the edge signal detection unit 105 and the VF signal processing unit 108.
- the edge signal detection unit 105 performs high-pass filter processing in the horizontal direction and the vertical direction for each frame on the standard-speed video signal with a frame rate of 60 Hz, and an edge signal corresponding to each frame with a frame rate of 60 Hz is generated. It is detected (see FIG. 3A). This edge signal is supplied to the VF signal processing unit 108.
- the edge signal detection unit 106 performs high-pass filter processing in the horizontal direction and the vertical direction for each frame on the HFR video signal having a frame rate of 240 Hz, and detects an edge signal corresponding to each frame having a frame rate of 240 Hz. (See FIG. 3 (b1) to (b4)). This edge signal is supplied to the edge signal generation unit 107.
- the edge signal generation unit 107 the edge signal of each frame is used, and the absolute value of the difference between the edge signals is calculated for each frame (see FIGS. 4 (b1) to (b4)). Then, the edge signal generation unit 107 adds the difference absolute value of 4 frames every 4 frames, and generates an edge signal corresponding to each frame at a frame rate of 60 Hz. This edge signal is supplied to the VF signal processing unit 108.
- an edge signal corresponding to each frame having a frame rate of 60 Hz generated by the edge signal generation unit 107 is synthesized with the standard-speed video signal having a frame rate of 60 Hz obtained by the frame rate conversion unit 104.
- a first video signal for viewfinder display is generated.
- the edge signal is combined with the video signal so that the edge is highlighted (for example, high luminance display, predetermined color display including white, etc.).
- an edge signal corresponding to each frame having a frame rate of 60 Hz detected by the edge signal detection unit 105 is added to the standard-speed video signal having a frame rate of 60 Hz obtained by the frame rate conversion unit 104.
- the edge signal is combined with the video signal so that the edge is highlighted (for example, high luminance display, predetermined color display including white, etc.).
- the edge signal corresponding to each frame of the 60 Hz frame rate generated by the edge signal generation unit 107 is added to the standard speed video signal of the 60 Hz frame rate obtained by the frame rate conversion unit 104.
- Both the (first edge signal) and the edge signal (second edge signal) corresponding to each frame of the frame rate of 60 Hz detected by the edge signal detection unit 105 are combined to generate a viewfinder display first. 3 video signals are generated. In this case, the edge signal is combined with the video signal so that the edge is highlighted (for example, high luminance display, predetermined color display including white, etc.).
- the VF signal processing unit 108 for example, one of the first video signal, the second video signal, and the third video signal is selectively output in accordance with a user's selection operation.
- the video signal for viewfinder display output from the VF signal processing unit 108 is sent to the VF display unit (viewfinder).
- FIG. 5A shows an example of an image for one frame displayed on the viewfinder by the first video signal for viewfinder display.
- the focus point is in the vicinity of the stationary part of the “cylinder” on the near side.
- the edge of the “person” that is the moving part is highlighted (see arrow R1).
- FIG. 5B shows an example of an image for one frame displayed on the viewfinder by the second video signal for viewfinder display.
- the focus point is in the vicinity of the stationary part of the “cylinder” on the near side.
- the edge of the “cylinder” that is a stationary part is highlighted (see arrow R2).
- FIG. 5C shows an example of an image for one frame displayed on the viewfinder by the third video signal for viewfinder display.
- the focus point is in the vicinity of the stationary part of the “cylinder” on the near side.
- both the edge of the “person” as the moving part and the edge of the “cylindrical” as the stationary part are highlighted (see arrows R1 and R2).
- an edge signal corresponding to each frame having a frame rate of 60 Hz is generated based on the edge signal detected in each frame of the HFR video signal having a frame rate of 240 Hz.
- a standard-speed video signal having a frame rate of 60 Hz to obtain a video signal (first video signal) for viewfinder display. Therefore, for example, the influence of moving image blur can be suppressed, the edge signal of the moving part can be obtained well as the edge signal corresponding to each frame of the frame rate of 60 Hz, and the edge emphasis display by the edge signal is also displayed on the moving part. Can be done.
- the edge signal difference absolute value between adjacent frames for each frame using the edge signal detected in each frame of the HFR video signal having a frame rate of 240 Hz. Is obtained every 4 frames from the absolute value of the difference between the edge signals of some or all of the frames. Therefore, for example, it is possible to perform edge emphasis display corresponding to only the edge of the moving part.
- the VF signal processing unit 108 generates first, second, and third video signals as viewfinder video signals and selectively outputs one of them. It is. For this reason, for example, it is possible to display an image in which edge emphasis display using an edge signal is performed only on a moving part, only a stationary part, or both a moving part and a stationary part on the viewfinder.
- the edge signal generation unit 107 uses the edge signal detected in each frame of the HFR video signal having a frame rate of 240 Hz to generate an edge signal between adjacent frames for each frame. After obtaining the difference absolute value, an edge signal for one frame is generated from the difference absolute value of the edge signal of a part or all of the frames every four frames. However, the edge signal generation unit 107 uses the edge signal detected in each frame of the HFR video signal having a frame rate of 240 Hz to make one frame from the absolute value of the edge signal of some or all frames every four frames. It is also conceivable that the edge signal of the minute is generated.
- the generated edge signal includes an edge signal corresponding to the edge of the stationary part in addition to the edge signal corresponding to the edge of the moving part (see FIG. 4A). Therefore, in this case, each of the frame rate of 60 Hz generated by the edge signal generation unit 107 is added to the standard speed video signal of the frame rate of 60 Hz obtained by the frame rate conversion unit 104 and generated by the VF signal processing unit 108.
- the first video signal for viewfinder display obtained by combining the edge signals corresponding to the frames is the same as the third video signal described above.
- the standard frame rate is 60 Hz
- the standard frame rate to which the present technology is applied is not limited to 60 Hz, and may be 59.94 Hz, 50 Hz, or the like.
- this technique can also take the following structures.
- An edge signal is detected by performing high-pass filter processing in the horizontal and vertical directions for each frame on a video signal having a second frame rate that is N times the first frame rate (N is an integer equal to or greater than 2).
- a video signal processing procedure comprising: an edge signal generation unit that generates an edge signal corresponding to each frame of the first frame rate based on an edge signal of each frame detected by the edge signal detection unit.
- the edge signal generator is Using the edge signal of each frame detected by the edge signal detection unit, for each frame, performing an arithmetic process to obtain the absolute value of the difference between the edge signals between adjacent frames,
- the video signal processing apparatus according to (1), wherein an edge signal for one frame is generated from an absolute difference value of the edge signals of a part or all of the frames every N frames.
- the edge signal generator is The edge signal for each frame is generated from the edge signals of some or all of the frames for every N frames using the edge signals of each frame detected by the edge signal detection unit.
- Video signal processing device is Using the edge signal of each frame detected by the edge signal detection unit, for each frame, performing an arithmetic process to obtain the absolute value of the difference between the edge signals between adjacent frames.
- An edge signal detection step for detecting the edge signal A video signal processing method comprising: an edge signal generation step of generating an edge signal corresponding to each frame of the first frame rate based on the edge signal of each frame detected in the edge signal detection step. (7) a frame rate conversion unit that obtains the video signal of the first frame rate from the captured video signal of the second frame rate that is N times the first frame rate (N is an integer equal to or greater than 2); An edge signal detection unit for detecting an edge signal by performing horizontal and vertical high-pass filtering on the captured video signal of the second frame rate for each frame; An edge signal generation unit that generates an edge signal corresponding to each frame of the first frame rate based on an edge signal of each frame detected by the edge signal detection unit; The video signal having the first frame rate obtained by the frame rate conversion unit is combined with the edge signal corresponding to each frame having the first frame rate generated by the edge signal generation unit, and the first signal is generated.
- a camera apparatus comprising a signal synthesis unit for obtaining a video signal for frame rate viewfinder display.
- the edge signal generator is Using the edge signal of each frame detected by the edge signal detection unit, for each frame, performing an arithmetic process to obtain the absolute value of the difference between the edge signals between adjacent frames, The camera device according to (7), wherein an edge signal for one frame is generated from a difference absolute value of the edge signal of a part or all of the frames every N frames.
- the edge signal generator is The edge signal of each frame generated by the edge signal detection unit is used to generate an edge signal for one frame from the edge signals of some or all of the frames every N frames. Camera device.
- (10) a color conversion unit that converts the edge signal of each frame generated by the edge signal generation unit into a color signal of a predetermined color and outputs the color signal;
- the signal synthesizer The video signal of the first frame rate obtained by the frame rate conversion unit is combined with the color signal of the predetermined color corresponding to each frame of the first frame rate output from the color conversion unit.
- the camera device according to any one of (7) to (9), wherein a video signal for viewfinder display at the first frame rate is obtained.
- the color conversion unit The camera device according to (10), wherein the predetermined color is determined based on a selection signal from a user operation unit.
- (12) The camera device according to any one of (7) to (11), wherein the second frame rate is 200 Hz or more.
- a frame rate conversion step of obtaining a video signal of the first frame rate from an imaged video signal of a second frame rate that is N times the first frame rate (N is an integer equal to or greater than 2);
- An edge signal detection step of detecting an edge signal by performing a high-pass filter process in a horizontal direction and a vertical direction for each frame on the imaged video signal of the second frame rate using a high-pass filter;
- An edge signal generation step for generating an edge signal corresponding to each frame of the first frame rate based on the edge signal of each frame detected in the edge signal detection step;
- the video signal having the first frame rate obtained in the frame rate converting step is combined with the edge signal corresponding to each frame having the first frame rate generated in the edge signal generating step.
- a video signal processing method comprising a signal synthesis step of obtaining a video signal for frame rate viewfinder display.
- a frame rate conversion unit that obtains the video signal of the first frame rate from the captured video signal of the second frame rate that is N times the first frame rate (N is an integer equal to or greater than 2);
- a first edge signal detection unit for detecting an edge signal by performing horizontal and vertical high-pass filtering on the captured video signal of the second frame rate for each frame;
- An edge signal generation unit that generates a first edge signal corresponding to each frame of the first frame rate based on an edge signal of each frame detected by the first edge signal detection unit;
- the video signal having the first frame rate obtained by the frame rate conversion unit is subjected to high-pass filter processing in the horizontal direction and the vertical direction for each frame, and the second corresponding to each frame having the first frame rate.
- a second edge signal detector for detecting the edge signal of The video signal having the first frame rate obtained by the frame rate converter is added to the first edge signal generated by the edge signal generator and the second edge signal detected by the second edge signal detector.
- Signal processing for outputting a video signal for viewfinder display at the first frame rate by combining two edge signals or a third edge signal obtained by combining the first edge signal and the second edge signal A camera device comprising a unit.
- the signal processing unit The camera device according to (14), wherein one of the first edge signal, the second edge signal, and the third edge signal is selectively output based on a selection signal from a user operation unit.
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Abstract
Description
第1のフレームレートのN倍(Nは2以上の整数)の第2のフレームレートの映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行ってエッジ信号を検出するエッジ信号検出部と、
上記エッジ信号検出部で検出された各フレームのエッジ信号に基づいて上記第1のフレームレートの各フレームに対応したエッジ信号を生成するエッジ信号生成部を備える
映像信号処理処置にある。
第1のフレームレートのN倍(Nは2以上の整数)の第2のフレームレートの撮像映像信号から上記第1のフレームレートの映像信号を得るフレームレート変換部と、
上記第2のフレームレートの撮像映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行ってエッジ信号を検出するエッジ信号検出部と、
上記エッジ信号検出部で検出された各フレームのエッジ信号に基づいて上記第1のフレームレートの各フレームに対応したエッジ信号を生成するエッジ信号生成部と、
上記フレームレート変換部で得られた上記第1のフレームレートの映像信号に上記エッジ信号生成部で生成された上記第1のフレームレートの各フレームに対応したエッジ信号を合成して上記第1のフレームレートのビューファインダ表示用の映像信号を得る信号合成部を備える
カメラ装置にある。
第1のフレームレートのN倍(Nは2以上の整数)の第2のフレームレートの撮像映像信号から上記第1のフレームレートの映像信号を得るフレームレート変換部と、
上記第2のフレームレートの撮像映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行ってエッジ信号を検出する第1のエッジ信号検出部と、
上記第1のエッジ信号検出部で検出された各フレームのエッジ信号に基づいて上記第1のフレームレートの各フレームに対応した第1のエッジ信号を生成するエッジ信号生成部と、
上記フレームレート変換部で得られた上記第1のフレームレートの映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行って上記第1のフレームレートの各フレームに対応した第2のエッジ信号を検出する第2のエッジ信号検出部と、
上記フレームレート変換部で得られた上記第1のフレームレートの映像信号に、上記エッジ信号生成部で生成された上記第1のエッジ信号、上記第2のエッジ信号検出部で検出された上記第2のエッジ信号、あるいは該第1のエッジ信号および該第2のエッジ信号を合わせた第3のエッジ信号を合成した、上記第1のフレームレートのビューファインダ表示用の映像信号を出力する信号処理部を備える
カメラ装置にある。
1.実施の形態
2.変形例
[カメラ装置の構成例]
図1は、実施の形態としてのカメラ装置100の構成例を示している。このカメラ装置100は、制御部101と、ユーザ操作部102と、撮像部103と、フレームレート変換部104と、エッジ信号検出部105と、エッジ信号検出部106と、エッジ信号生成部107とVF信号処理部108を有している。
なお、上述実施の形態において、エッジ信号生成部107は、240HzのフレームレートのHFR映像信号の各フレームで検出されたエッジ信号を用いて、フレーム毎に、隣接するフレームとの間でエッジ信号の差分絶対値を求めた後、4フレーム毎に、一部または全部のフレームのエッジ信号の差分絶対値から1フレーム分のエッジ信号を生成するものであった。しかし、エッジ信号生成部107は、240HzのフレームレートのHFR映像信号の各フレームで検出されたエッジ信号を用いて、4フレーム毎に、一部または全部のフレームのエッジ信号の絶対値から1フレーム分のエッジ信号を生成する構成とすることも考えられる。
(1)第1のフレームレートのN倍(Nは2以上の整数)の第2のフレームレートの映像信号対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行ってエッジ信号を検出するエッジ信号検出部と、
上記エッジ信号検出部で検出された各フレームのエッジ信号に基づいて上記第1のフレームレートの各フレームに対応したエッジ信号を生成するエッジ信号生成部を備える
映像信号処理処置。
(2)上記エッジ信号生成部は、
上記エッジ信号検出部で検出された各フレームのエッジ信号を用いて、フレーム毎に、隣接するフレームとの間で上記エッジ信号の差分絶対値を求める演算処理を行い、
Nフレーム毎に、一部または全部のフレームの上記エッジ信号の差分絶対値から1フレーム分のエッジ信号を生成する
前記(1)に記載の映像信号処理装置。
(3)上記エッジ信号生成部は、
上記エッジ信号検出部で検出された各フレームのエッジ信号を用いて、Nフレーム毎に、一部または全部のフレームの上記エッジ信号から1フレーム分のエッジ信号を生成する
前記(1)に記載の映像信号処理装置。
(4)上記エッジ信号生成部で生成された各フレームのエッジ信号を所定色の色信号に変換して出力する色変換部をさらに備える
前記(1)から(3)のいずれかに記載の映像信号処理装置。
(5)上記第2のフレームレートは、200Hz以上である
前記(1)から(4)のいずれかに記載の映像信号処理装置。
(6)ハイパスフィルタを用いて第1のフレームレートのN倍(Nは2以上の整数)の第2のフレームレートの映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行ってエッジ信号を検出するエッジ信号検出ステップと、
上記エッジ信号検出ステップで検出された各フレームのエッジ信号に基づいて上記第1のフレームレートの各フレームに対応したエッジ信号を生成するエッジ信号生成ステップを有する
映像信号処理方法。
(7)第1のフレームレートのN倍(Nは2以上の整数)の第2のフレームレートの撮像映像信号から上記第1のフレームレートの映像信号を得るフレームレート変換部と、
上記第2のフレームレートの撮像映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行ってエッジ信号を検出するエッジ信号検出部と、
上記エッジ信号検出部で検出された各フレームのエッジ信号に基づいて上記第1のフレームレートの各フレームに対応したエッジ信号を生成するエッジ信号生成部と、
上記フレームレート変換部で得られた上記第1のフレームレートの映像信号に上記エッジ信号生成部で生成された上記第1のフレームレートの各フレームに対応したエッジ信号を合成して上記第1のフレームレートのビューファインダ表示用の映像信号を得る信号合成部を備える
カメラ装置。
(8)上記エッジ信号生成部は、
上記エッジ信号検出部で検出された各フレームのエッジ信号を用いて、フレーム毎に、隣接するフレームとの間で上記エッジ信号の差分絶対値を求める演算処理を行い、
Nフレーム毎に、一部または全部のフレームの上記エッジ信号の差分絶対値から1フレーム分のエッジ信号を生成する
前記(7)に記載のカメラ装置。
(9)上記エッジ信号生成部は、
上記エッジ信号検出部で検出された各フレームのエッジ信号を用いて、Nフレーム毎に、一部または全部のフレームの上記エッジ信号から1フレーム分のエッジ信号を生成する
前記(7)に記載のカメラ装置。
(10)上記エッジ信号生成部で生成された各フレームのエッジ信号を所定色の色信号に変換して出力する色変換部をさらに備え、
上記信号合成部は、
上記フレームレート変換部で得られた上記第1のフレームレートの映像信号に、上記色変換部から出力される上記第1のフレームレートの各フレームに対応した上記所定色の色信号を合成して上記第1のフレームレートのビューファインダ表示用の映像信号を得る
前記(7)から(9)のいずれかに記載のカメラ装置。
(11)上記色変換部は、
上記所定色をユーザ操作部からの選択信号に基づいて決定する
前記(10)に記載のカメラ装置。
(12)上記第2のフレームレートは、200Hz以上である
前記(7)から(11)のいずれかに記載のカメラ装置。
(13)第1のフレームレートのN倍(Nは2以上の整数)の第2のフレームレートの撮像映像信号から上記第1のフレームレートの映像信号を得るフレームレート変換ステップと、
ハイパスフィルタを用いて上記第2のフレームレートの撮像映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行ってエッジ信号を検出するエッジ信号検出ステップと、
上記エッジ信号検出ステップで検出された各フレームのエッジ信号に基づいて上記第1のフレームレートの各フレームに対応したエッジ信号を生成するエッジ信号生成ステップと、
上記フレームレート変換ステップで得られた上記第1のフレームレートの映像信号に上記エッジ信号生成ステップで生成された上記第1のフレームレートの各フレームに対応したエッジ信号を合成して上記第1のフレームレートのビューファインダ表示用の映像信号を得る信号合成ステップを備える
映像信号処理方法。
(14)第1のフレームレートのN倍(Nは2以上の整数)の第2のフレームレートの撮像映像信号から上記第1のフレームレートの映像信号を得るフレームレート変換部と、
上記第2のフレームレートの撮像映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行ってエッジ信号を検出する第1のエッジ信号検出部と、
上記第1のエッジ信号検出部で検出された各フレームのエッジ信号に基づいて上記第1のフレームレートの各フレームに対応した第1のエッジ信号を生成するエッジ信号生成部と、
上記フレームレート変換部で得られた上記第1のフレームレートの映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行って上記第1のフレームレートの各フレームに対応した第2のエッジ信号を検出する第2のエッジ信号検出部と、
上記フレームレート変換部で得られた上記第1のフレームレートの映像信号に、上記エッジ信号生成部で生成された上記第1のエッジ信号、上記第2のエッジ信号検出部で検出された上記第2のエッジ信号、あるいは該第1のエッジ信号および該第2のエッジ信号を合わせた第3のエッジ信号を合成した、上記第1のフレームレートのビューファインダ表示用の映像信号を出力する信号処理部を備える
カメラ装置。
(15)上記信号処理部は、
ユーザ操作部からの選択信号に基づいて、上記第1のエッジ信号、上記第2のエッジ信号、上記第3のエッジ信号のいずれかを選択的に出力する
前記(14)に記載のカメラ装置。
101・・・制御部
102・・・ユーザ操作部
103・・・撮像部
104・・・フレームレート変換部
105,106・・・エッジ信号検出部
107・・・エッジ信号生成部
108・・・VF信号処理部
Claims (15)
- 第1のフレームレートのN倍(Nは2以上の整数)の第2のフレームレートの映像信号対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行ってエッジ信号を検出するエッジ信号検出部と、
上記エッジ信号検出部で検出された各フレームのエッジ信号に基づいて上記第1のフレームレートの各フレームに対応したエッジ信号を生成するエッジ信号生成部を備える
映像信号処理処置。 - 上記エッジ信号生成部は、
上記エッジ信号検出部で検出された各フレームのエッジ信号を用いて、フレーム毎に、隣接するフレームとの間で上記エッジ信号の差分絶対値を求める演算処理を行い、
Nフレーム毎に、一部または全部のフレームの上記エッジ信号の差分絶対値から1フレーム分のエッジ信号を生成する
請求項1に記載の映像信号処理装置。 - 上記エッジ信号生成部は、
上記エッジ信号検出部で検出された各フレームのエッジ信号を用いて、Nフレーム毎に、一部または全部のフレームの上記エッジ信号から1フレーム分のエッジ信号を生成する
請求項1に記載の映像信号処理装置。 - 上記エッジ信号生成部で生成された各フレームのエッジ信号を所定色の色信号に変換して出力する色変換部をさらに備える
請求項1に記載の映像信号処理装置。 - 上記第2のフレームレートは、200Hz以上である
請求項1に記載の映像信号処理装置。 - ハイパスフィルタを用いて第1のフレームレートのN倍(Nは2以上の整数)の第2のフレームレートの映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行ってエッジ信号を検出するエッジ信号検出ステップと、
上記エッジ信号検出ステップで検出された各フレームのエッジ信号に基づいて上記第1のフレームレートの各フレームに対応したエッジ信号を生成するエッジ信号生成ステップを有する
映像信号処理方法。 - 第1のフレームレートのN倍(Nは2以上の整数)の第2のフレームレートの撮像映像信号から上記第1のフレームレートの映像信号を得るフレームレート変換部と、
上記第2のフレームレートの撮像映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行ってエッジ信号を検出するエッジ信号検出部と、
上記エッジ信号検出部で検出された各フレームのエッジ信号に基づいて上記第1のフレームレートの各フレームに対応したエッジ信号を生成するエッジ信号生成部と、
上記フレームレート変換部で得られた上記第1のフレームレートの映像信号に上記エッジ信号生成部で生成された上記第1のフレームレートの各フレームに対応したエッジ信号を合成して上記第1のフレームレートのビューファインダ表示用の映像信号を得る信号合成部を備える
カメラ装置。 - 上記エッジ信号生成部は、
上記エッジ信号検出部で検出された各フレームのエッジ信号を用いて、フレーム毎に、隣接するフレームとの間で上記エッジ信号の差分絶対値を求める演算処理を行い、
Nフレーム毎に、一部または全部のフレームの上記エッジ信号の差分絶対値から1フレーム分のエッジ信号を生成する
請求項7に記載のカメラ装置。 - 上記エッジ信号生成部は、
上記エッジ信号検出部で検出された各フレームのエッジ信号を用いて、Nフレーム毎に、一部または全部のフレームの上記エッジ信号から1フレーム分のエッジ信号を生成する
請求項7に記載のカメラ装置。 - 上記エッジ信号生成部で生成された各フレームのエッジ信号を所定色の色信号に変換して出力する色変換部をさらに備え、
上記信号合成部は、
上記フレームレート変換部で得られた上記第1のフレームレートの映像信号に、上記色変換部から出力される上記第1のフレームレートの各フレームに対応した上記所定色の色信号を合成して上記第1のフレームレートのビューファインダ表示用の映像信号を得る
請求項7に記載のカメラ装置。 - 上記色変換部は、
上記所定色をユーザ操作部からの選択信号に基づいて決定する
請求項10に記載のカメラ装置。 - 上記第2のフレームレートは、200Hz以上である
請求項7に記載のカメラ装置。 - 第1のフレームレートのN倍(Nは2以上の整数)の第2のフレームレートの撮像映像信号から上記第1のフレームレートの映像信号を得るフレームレート変換ステップと、
ハイパスフィルタを用いて上記第2のフレームレートの撮像映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行ってエッジ信号を検出するエッジ信号検出ステップと、
上記エッジ信号検出ステップで検出された各フレームのエッジ信号に基づいて上記第1のフレームレートの各フレームに対応したエッジ信号を生成するエッジ信号生成ステップと、
上記フレームレート変換ステップで得られた上記第1のフレームレートの映像信号に上記エッジ信号生成ステップで生成された上記第1のフレームレートの各フレームに対応したエッジ信号を合成して上記第1のフレームレートのビューファインダ表示用の映像信号を得る信号合成ステップを備える
映像信号処理方法。 - 第1のフレームレートのN倍(Nは2以上の整数)の第2のフレームレートの撮像映像信号から上記第1のフレームレートの映像信号を得るフレームレート変換部と、
上記第2のフレームレートの撮像映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行ってエッジ信号を検出する第1のエッジ信号検出部と、
上記第1のエッジ信号検出部で検出された各フレームのエッジ信号に基づいて上記第1のフレームレートの各フレームに対応した第1のエッジ信号を生成するエッジ信号生成部と、
上記フレームレート変換部で得られた上記第1のフレームレートの映像信号に対してフレーム毎に水平方向および垂直方向のハイパスフィルタ処理を行って上記第1のフレームレートの各フレームに対応した第2のエッジ信号を検出する第2のエッジ信号検出部と、
上記フレームレート変換部で得られた上記第1のフレームレートの映像信号に、上記エッジ信号生成部で生成された上記第1のエッジ信号、上記第2のエッジ信号検出部で検出された上記第2のエッジ信号、あるいは該第1のエッジ信号および該第2のエッジ信号を合わせた第3のエッジ信号を合成した、上記第1のフレームレートのビューファインダ表示用の映像信号を出力する信号処理部を備える
カメラ装置。 - 上記信号処理部は、
ユーザ操作部からの選択信号に基づいて、上記第1のエッジ信号、上記第2のエッジ信号、上記第3のエッジ信号のいずれかを選択的に出力する
請求項14に記載のカメラ装置。
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US10469729B2 (en) | 2019-11-05 |
JP6665918B2 (ja) | 2020-03-13 |
JP6443346B2 (ja) | 2018-12-26 |
EP3094079B1 (en) | 2023-03-29 |
JPWO2015104969A1 (ja) | 2017-03-23 |
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EP3094079A1 (en) | 2016-11-16 |
EP3094079A4 (en) | 2017-08-16 |
US20190379820A1 (en) | 2019-12-12 |
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