JP2004343650A - Video camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an object from being influenced by camera framing and to instantaneously recognize a target object, in the case of recognizing the target object by using an EVF or an LCD of a video camera. <P>SOLUTION: In the video camera having a video display device such as the EVF or the LCD, a feature color of the target object is specified by using a color selection circuit 6. A selected color detection circuit 7 generates a selected color detection signal by comparing a color difference signal from a recording/reproduction processing circuit 3 by a color difference signal level of the color selection circuit 6 and provides it to a display control circuit 5. Thus, reversing display of the specified color of the target object is performed to a symmetrical color at prescribed time intervals. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a video camera having an electric viewfinder and a monitor display device, and having improved recognizability of a shooting state via the display device.
[0002]
[Prior art]
A technique has been disclosed that detects a specific color portion of a video signal, performs image processing, and facilitates recognition of a target subject on a display device. For example, Patent Literature 1 discloses a technique in which only a specific color is colored and other colors are displayed in monochrome, or a technique in which only a specific color is subjected to saturation enhancement processing and displayed.
[0003]
Further, Patent Literature 2 discloses a technique of performing color correction processing only on a specific color or a technique of performing level compression / expansion processing on only a signal of a specific color.
[0004]
[Patent Document 1]
JP-A-7-274190
[Patent Document 2]
JP-A-6-141337
[0005]
[Problems to be solved by the invention]
2. Description of the Related Art In recent years, display devices such as a conventional electric viewfinder (hereinafter, referred to as EVF) for checking a shooting state by looking into the camera, and a large liquid crystal display device (hereinafter, LCD) capable of recognizing a shooting condition without looking into the camera. On the other hand, home video cameras equipped with one or both display devices have become widespread.
[0006]
However, the above technique may cause the following problem. In the case of EVF, the photographing state is checked by looking into one eye. An experienced photographer can confirm the photographing state of a wide range with the other one eye, and can photograph so that the camera position is adjusted according to the movement of the subject. In this case, the line of sight of the photographer coincides with the optical axis direction of the camera, and the overall viewing angle and the camera position are relatively easy to match. However, since the size of the screen of the EVF is about 1 inch, the resolution is low and the position of the subject may be lost.
[0007]
On the other hand, in the case of the LCD, the subject can be recognized by both eyes without looking into the screen, and since the screen is larger and the resolution is higher than that of the EVF, the subject can be easily recognized. However, since there is no need to look into the camera, the direction of the optical axis of the camera does not match the line of sight of the photographer, and the line of sight faces the subject even in the shooting state, and the camera is often used in a hand-held state. Therefore, when the eyes are returned to the LCD, a situation may occur in which it is not possible to immediately recognize where the subject is located in the camera view angle. For example, in an event such as an athletic meet, an entrance ceremony, or a graduation ceremony, in many cases, the target subject is located far away with the same clothes. In this case, in the state where the zoom shooting is being performed, when the eyes are returned to the LCD, the subject within the angle of view of the camera is often lost.
[0008]
Here, a description will be given of a problem that occurs when only a target subject having a specific color is colored, or the saturation is enhanced, or a process of making a monochrome display is performed.
(1) When only the target color is colored, when the target subject is sufficiently small with respect to the camera frame, the position of the target subject is easily recognized. In this case, since the entire image is displayed in monochrome, it is difficult to take the entire camera framing.
(2) When the saturation of only the target color is enhanced, since the display resolution is low in EVF, it is difficult to recognize when the target subject is small. Even on an LCD, even if the eyes are released once, it is difficult to recognize where the target subject is located in the camera frame only by saturation enhancement. Further, even if an attempt is made to recognize a subject with a specific color, the degree of recognition of the color recognized by the naked eye and the color of the subject displayed on the LCD through camera processing may differ considerably depending on the setting.
(3) When only the target color is displayed in monochrome, the display resolution is low in EVF, so that when the target subject is small, it can hardly be recognized. It is difficult to recognize the LCD if there is no large difference from the background of the target subject after returning the eyes.
[0009]
The present invention solves the above-mentioned conventional problems (1), (2), and (3), and is less affected by camera framing when both the EVF and the LCD recognize a target subject. It is another object of the present invention to realize a video camera capable of instantly recognizing a target subject.
[0010]
[Means for Solving the Problems]
The invention according to claim 1 of the present application provides an image display means provided on a camera body for displaying images of a camera image and a media playback image, a color selection means for selecting an arbitrary color from a subject by input, and the color selection means Selection color detection means for detecting an area corresponding to the selection color selected by the means from the video displayed on the video display means, and a color signal for the selection color of the area detected by the selection color detection means. While changing the phase, when outputting an image having the color signal detected by the selected color detection means to the image display means, the original color signal and the changed color signal are alternately switched at predetermined time intervals. And display control means for performing display control.
[0011]
The invention according to claim 2 of the present application is the video camera according to claim 1, wherein the color selection unit includes a touch panel disposed on a front surface of the image display unit, and a selection position of an image by the touch panel when the touch panel is pressed. A selection color holding memory for detecting a selected color based on a time phase of an image displayed by the image display means and holding a signal level of the selected color.
[0012]
According to a third aspect of the present invention, in the video camera according to the first aspect, the color selecting unit is configured to include, when a subject of a specific color is contained in a partial frame of a display area of the video display unit, And a selection color holding memory for selecting a color and holding a signal level of the selection color.
[0013]
According to a fourth aspect of the present invention, in the video camera according to the first aspect, the selected color detecting means determines whether or not the color signal of the image is within a predetermined ratio range based on two color difference signal levels of the selected color. Is detected.
[0014]
According to a fifth aspect of the present invention, in the video camera of the first aspect, the selected color detecting means determines whether or not the color signal of the image is within a predetermined ratio range based on two color difference signal levels of the selected color. And detecting whether the luminance signal of the video is within a predetermined range with respect to the luminance signal level of the selected color area.
[0015]
The invention according to claim 6 of the present application is the video camera according to claim 1, wherein the display control unit converts a color signal of a video obtained by imaging based on a selection color detection signal output from the selection color detection unit. Color phase switching means for switching between outputting as it is or outputting a signal in which the color phase is inverted, wherein the color phase switching means is switched according to the angle of view position of a subject having a selected color set by the color selection means. The period is variable.
[0016]
According to a seventh aspect of the present invention, there is provided an image display means provided on a camera body for displaying images of a camera image and a media playback image, a color selection means for selecting an arbitrary color from a subject by input, A selection color detection means for detecting an area corresponding to the selection color selected by the means from the image displayed on the image display means, and an area having the same selection color as the color selected by the color selection means, A selected color area enlarging means for performing delay and selection processing for enlarging and displaying the area detected by the selected color detecting means as a center, and changing a phase of a color signal of the area enlarged by the selected color area enlarging means. At the same time, when outputting an image having the color signal detected by the selected color detection means to the image display means, the original color signal and the changed color signal are alternately switched and displayed at predetermined time intervals. And Gosuru display control means, characterized by comprising.
[0017]
The invention according to claim 8 of the present application is the video camera according to claim 7, wherein the selected color area enlarging means includes a vertical direction image accumulating means for accumulating three or more lines of color difference signals of the input image in the vertical direction, A horizontal image accumulating means for accumulating three or more color difference signals in the horizontal direction. The level is copied to enlarge the display area of the selected color.
[0018]
According to a ninth aspect of the present invention, in the video camera of the seventh aspect, the selected color area enlarging means changes the enlarged area in accordance with the size of the area of the selected color.
[0019]
According to a tenth aspect of the present invention, there is provided an image display means provided on a camera body for displaying images of a camera image and a media playback image, a color selection means for selecting an arbitrary color from a subject by input, and the color selection means A selection color detection means for detecting an area corresponding to the selection color selected by the means from the image displayed on the image display means, and a color difference signal of the area detected by the selection color detection means over a plurality of frames. And a display control unit for displaying the trajectory of the subject having the selected color over a plurality of frames.
[0020]
According to an eleventh aspect of the present invention, in the video camera of the tenth aspect, the image storage means writes an integrated value with a past pixel already stored when newly writing the selected color area. And
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a video camera according to each embodiment of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a block diagram illustrating a configuration example of a video camera according to each embodiment. The camera 1 converts an image incident from a subject into an electric signal using an image sensor such as a CCD image sensor. After performing the noise removal processing, the camera signal processing circuit 2 performs signal processing related to photoelectric conversion such as gamma correction and knee correction processing, and performs two processings of a luminance signal and RY and BY by matrix processing. The color difference signal is output as a video signal.
[0022]
The recording / reproducing processing circuit 3 performs modulation / demodulation processing and recording / reproducing processing with the medium 4 as a recording medium, and adds character data to an input signal from the camera signal processing circuit 2 or the medium 4. . The recording / reproducing circuit 3 outputs a video signal for monitoring to a video display device 8 such as an EVF and an LCD.
[0023]
The image display device 8 is an image display means such as an EVF or an LCD attached to the camera body. When a photographer captures an image of a subject, a camera image is monitored on an EVF or LCD. The EVF is also composed of a small liquid crystal panel, but the LCD of the present embodiment is a medium-sized liquid crystal panel that is attached to the camera body so as to be openable and fixed or fixed. The video display device 8 can display the video on the LCD even when the video is reproduced from a recording medium such as a memory card, an optical disk, or a magnetic tape. As the image display device 8, a liquid crystal panel is mainly used at present, but an organic EL panel that emits light by itself can also be used.
[0024]
The color selection circuit 6 is a color selection unit that converts a signal specified by the photographer on the display of the video display device 8 into a selection signal from the signal of the recording / reproduction processing circuit 3. The color selection circuit 6 has a selected color holding memory, and holds the color difference signal level of the selected color.
[0025]
FIG. 2 is an explanatory diagram showing a specific example of a method of selecting an arbitrary color in a subject. FIG. 2A is a principle diagram when a specific color is selected using a touch panel. In this example, a touch panel 82 that senses contact with a finger or the like is arranged on the video display device 8. The touch panel 82 recognizes a two-dimensional contact position. For example, when selecting a clothing portion of the subject 81 as indicated by diagonal lines, the user touches the selection area 83 on the touch panel 82 with his / her finger or the like, so that the respective color difference signal levels in the corresponding position area, that is, RY and B- The value of Y is detected. That is, the selected color of the specific pixel is detected based on the selection position of the image (pixel) by the touch panel 82 and the display time of the pixel displayed by the image display device 8, and the selected color is stored in the selected color holding memory in the color selection circuit 6. Will be retained.
[0026]
FIG. 2A is an explanatory diagram of a case where a color is selected using a selection frame during image display. For example, a color selection frame 84 is displayed on the video display device 8, and a frame of a color to be selected by the subject, which is indicated by oblique lines, is framed in the frame, and color selection is performed using a setting button or the like. The RY and BY values corresponding to the frame, that is, the respective color difference signal levels, are held by the color selection circuit 6.
[0027]
A selection color detection circuit 7 as a selection color detection means compares the color difference signal level held by the color selection circuit 6 with the color difference signal from the recording / reproduction processing circuit 3, and outputs the same color to pixels in a predetermined area. A search is performed to determine whether or not there is a pixel having a phase. If there is a region having the same color phase, a selection color detection signal (for example, an H level logic signal) is output.
[0028]
FIG. 3 is a coordinate drawing showing the relationship between the color difference signal and the color phase. The color phase is determined by the level ratio between each other on a vector based on the color difference signals RY and BY. The absolute value level of the vector indicates the color saturation. By comparing this level ratio with the level ratio of the color difference signal held in the color selection circuit 6, a specific color phase can be detected from the image to be detected.
[0029]
FIG. 4 is a configuration diagram of a selection color detection circuit 7A which is a specific configuration example of the selection color detection circuit 7, and FIG. 5 is an explanatory diagram of its operation. The selected colors held by the color selection circuit 6, that is, the color difference signal RY level and the color difference signal BY level are subjected to noise removal by low-pass filters (hereinafter, referred to as LPFs) 701 and 711. . Similarly, noise is removed from the color difference signals RY and BY input from the recording / reproducing circuit 3 by the LPFs 702 and 712, respectively.
[0030]
The output of the LPF 701 is added to the output multiplied by K (K <1) by the coefficient unit 703 and added by the adder 704 to be converted into a comparison upper limit value. Further, the output of the LPF 701 is subtracted by the subtracter 705 by the output multiplied by K (K <1) by the coefficient unit 703, and is converted into a comparison lower limit value. Then, the color difference signal RY from the LPF 702 is compared with upper and lower limit values by comparators 706 and 707, respectively. Each comparison result is input to a logical product circuit (hereinafter, referred to as AND) 708, and the logical product is output as an RY level comparison result.
[0031]
Similarly, the output of the LPF 711 is added to the output multiplied by K (K <1) by the coefficient unit 713 and added by the adder 714 to be converted into a comparison upper limit value. Further, the output of the LPF 711 is subtracted by the subtractor 715 only by the output multiplied by K (K <1) by the coefficient unit 713, and is converted into a comparison lower limit value. The color difference signal BY from the LPF 712 is compared with upper and lower limit values of respective comparisons by comparators 716 and 717, and the result of each comparison is input to AND 718. The logical product is output as a BY-level comparison result. Finally, the logical product of the comparison results of the RY level and the BY level is calculated by the AND 71, and is output as a selected color detection signal. In this way, by using the held values of the respective color difference signal levels as reference values, the range of ± K times the detection range is detected, and the level ratio between them is detected, so that the desired color phase range can be obtained independently of the color saturation level. Of pixels can be detected.
[0032]
FIG. 5A is an explanatory diagram of an operation of detecting a selected color when a color difference level exists to some extent. For example, assuming that the reference value of the color difference signal BY level, which is the selected color held in the color selection circuit 6, is a and the reference value of the color difference signal RY level is b, the respective values are ± K times the reference value. The sum of the values is used as the upper and lower limit value for comparison. If there is an input signal level in the shaded area surrounded by the upper and lower levels, the selected color detection circuit 7A determines that the phase is the same.
[0033]
FIG. 5A is an explanatory diagram of an operation of detecting a selected color when the color saturation is small. In this figure, as in (a), the range of ± K times the reference values a 'and b' is set as the upper and lower limit of the comparison, and it is determined whether or not the input color difference signal is within the range. Since the upper and lower limit values for comparison are not fixed values, the detected color phase can be determined to be in the same range in both cases, regardless of the color saturation.
[0034]
FIG. 6 is a block diagram showing another configuration of the selection color detection circuit 7, that is, a specific configuration example of the selection color detection circuit 7B. Here, the same parts as those in FIG. 4 are denoted by the same reference numerals, and the description of those parts will be omitted. In the selection color detection circuit 7B, the color selection circuit 6 performs color selection, and holds the luminance signal level of the area together with the color difference signal level, thereby improving the detection accuracy in color phase detection. In the selection color detection circuit 7B, in addition to the configuration of FIG. 4, the luminance signal Y input from the recording / reproducing circuit 3 is supplied to comparators 726 and 727 through an LPF 722. The selected color luminance level held by the color selection circuit 6 is input to a coefficient unit 723, an adder 724, and a subtractor 725 through an LPF 721. Then, as in the case of the color difference signal level, a value obtained by multiplying the holding level by ± K is added to the selected color luminance level, and converted into a luminance upper and lower limit value. The comparator upper and lower limit values and the input luminance signal are compared by comparators 726 and 727, and AND 728 calculates the logical product of the comparison results. Finally, the logical product of the comparison result of the two color difference signals and the comparison result of the luminance signal is calculated using the AND 71, and is output as a selected color detection signal.
[0035]
The display control circuit 5 having the function of changing the color phase switches the color difference signal from the recording / reproducing circuit 3 to a different color difference signal at a predetermined time interval according to the selected color detection signal from the selected color detection circuit 7, An original color difference signal and a color difference signal having a changed color phase are output alternately. The luminance signal is output as it is.
[0036]
Next, the display control circuit 5 will be described. FIG. 7 is a block diagram showing an example of the display control circuit 5, that is, a specific configuration of the display control circuit 5A. 8 and 9 are explanatory diagrams of the operation. The changeover switch 52 of FIG. 7 inputs the color difference signal from the recording / reproducing circuit 3 as it is to one input terminal, and multiplies the input color difference signal by −1 using the coefficient unit 51 to the other input terminal. Hue switching means for inverting the sign and inputting, and switching one of them for output. The switching control of the changeover switch 52 outputs the logical product of the output of the counter 53 for setting a predetermined time interval and the selected color detection signal of the selected color detection circuit 7 from the AND 54, and selects the logical product by the display output to the video display device 8. The color phase of the color can be changed periodically. For example, when the selected color is “magenta” in FIG. 8, the color becomes “green” symmetrical to “magenta” simply by inverting the sign of the color difference signal, and can be easily converted to a symmetrical color phase. More precisely, the changeover switch 52 is provided for each of the two types of color difference signals. A part that exhibits such a function is called a hue switching unit.
[0037]
FIG. 9 shows an example of a display screen of the video display device 8. When the target subject enters an area at the end of the angle of view as indicated by the diagonal lines on the display screen, the cycle of the color phase inversion may be shortened by shortening the count cycle of the counter 53. In this way, a warning is issued for the framing of the subject. Then, the video display device 8 converts the video signal from the display control circuit 5 into a video.
[0038]
(Embodiment 2)
Next, a video camera according to Embodiment 2 of the present invention will be described. The overall configuration of the video camera is the same as that shown in FIG. This embodiment is characterized in that a new function is added to the display control circuit 5. FIG. 10 is a block diagram showing a configuration of a display control circuit 5B to which a selection color enlargement processing function is added in addition to the configuration of FIG. In FIG. 10, a selection color enlargement processing circuit 50, which is a selection color area enlargement means, is a circuit arranged at a stage preceding the display control circuit 5A of FIG. The selection color enlargement processing circuit 50 includes a vertical enlargement processing circuit 500 as a vertical image storage means and a horizontal enlargement processing circuit 550 as a horizontal image storage means. The selected color enlargement processing circuit 50 receives the luminance signal and the color difference signal from the recording / reproducing circuit 3 and the holding level (color difference signal level) of the color difference signal selected from the color selection circuit 6, and the color selection circuit 6 A delay and selection process for enlarging and displaying an area having the same selection color as the selected color around the area detected by the selection color detection circuit 7 is performed.
[0039]
FIG. 11 is a block diagram showing a configuration example of the vertical enlargement processing circuit 500. The color difference signal input from the recording / reproducing circuit 3 sequentially passes through delay circuits 502 to 505 having the characteristic of 1H line delay. As a result, information of a total of 5H lines of ± 2H lines in the vertical direction in addition to the horizontal scanning lines can be obtained at the same time. The color difference signals within a predetermined level range are detected using the selected color detection circuits 511 to 515 based on the selected color detection signal for the color difference signal and each of the delay signals. That is, the color difference signal within the predetermined level range is determined as the same color phase region, and the determination result is output to the output selection circuit 520 as a new selected color detection signal.
[0040]
The output selection circuit 520 supplies a control signal to the changeover switch 530 so as to select the output of the delay circuit 503 as the specified output. However, when a selected color is detected for an input signal 2H lines away from the line or an output of only the delay circuit 505, the output selection circuit 520 selects a color difference signal corresponding to the detection signal. When a selected color is detected for the output of the delay circuit 502 or the delay circuit 504 separated by 1H line, a color difference signal corresponding to the detected signal is selected. Further, when the selected color is detected with respect to the output of the delay circuit 503 which is the signal of the line, or when the selected color is not detected in any of the signals of the delay circuits, the color difference signal of the delay circuit 503 is output. select.
[0041]
The changeover switch 530 selects a color difference signal according to the control signal of the output selection circuit 520, and outputs it to the horizontal enlargement processing circuit 550 of FIG. On the other hand, since the specified output of the color difference signal is delayed by 2H lines, the luminance signal is delayed by 2H lines in the delay circuits 506 and 507 in the same manner as the color difference signal, and is output to the horizontal enlargement processing circuit 550.
[0042]
The configuration of the horizontal enlargement processing circuit 550 is basically the same as that of the vertical enlargement processing circuit 500. Only the delay amount of the delay circuit becomes a horizontal pixel unit, an output is selected by the same control as the vertical enlargement processing circuit 500, and a luminance signal and a color difference signal are output to a subsequent processing circuit in the display control circuit 5B. As in the first embodiment, a selection color detection circuit 55 is provided as shown in FIG. 10, and the color phase is inverted using the changeover switch 52 and output to the video display device 8.
[0043]
FIG. 12 is an explanatory diagram showing the processing functions of the selected color enlargement processing circuit 50 according to the second embodiment on a display screen. For example, if the pixel on which the selected color is detected on the original screen is the central black portion, the vertical enlargement processing circuit 500 copies the color difference signal of the black portion to the same horizontal position of the upper and lower two lines, and then the horizontal enlargement processing circuit 550 The above-described color difference signal is copied to the left and right two pixels at the same vertical position. By doing so, a total of 25 pixels of 5 × 5 pixels per pixel can be enlarged and displayed as the same color difference signal. Further, by increasing the number of delay circuits in the vertical enlargement processing circuit 500 and the horizontal enlargement processing circuit 550, the number of pixels to be processed can be further increased. Further, the enlargement area may be made variable according to the detection area of the selected color.
[0044]
(Embodiment 3)
Next, a video camera according to Embodiment 3 of the present invention will be described. The overall configuration of the video camera is the same as that shown in FIG. This embodiment is characterized in that a new function is added to the display control circuit 5. FIG. 13 is a block diagram showing a configuration of a display control circuit 5C to which a trajectory display processing function is added in addition to the configuration of FIG. A trajectory display processing circuit 57, which is an image storage means for trajectory display, is provided at a preceding stage of the display control circuit 5A in FIG. Input a color detection signal.
[0045]
FIG. 14 is a block diagram illustrating a configuration example of the trajectory display processing circuit 57. The changeover switch 577 adds the color difference signal input from the recording / reproducing circuit 3 and the color difference signal having passed through the one-frame delay circuit 578 to the adder 575, and then multiplies K1 times by the coefficient unit 576 ( K1 <1) is input. The output of the changeover switch 577 is delayed by one frame period in the one-frame delay circuit 578 described above, and is provided as a color difference signal output to a subsequent processing circuit in the display control circuit 5C.
[0046]
On the other hand, the selected color detection signals input to the trajectory display processing circuit 57 sequentially pass through the one-frame delay circuits 570 to 573. The output of each one-frame delay circuit is converted into a logical sum by OR 574 and becomes the control signal of the changeover switch 577. If the selected color is detected in each one-frame delay circuit, the changeover switch 577 selects the input signal from the coefficient unit 576. In addition, since the color difference signal is delayed by one frame by the one-frame delay circuit 578 and integrated, the luminance signal and the selected color detection signal are also passed through the one-frame delay circuit 579 and the one-frame delay circuit 570, respectively. Outputs of the one-frame delay circuits 578 and 579 are provided to a subsequent processing circuit in the display control circuit 5C.
[0047]
FIG. 15 is an explanatory diagram showing a processing result of the trajectory display processing circuit 57 on a display screen. The subject 89 in the video display device 8 represents the subject having the currently selected color, and the subject 88 represents the subject having the selected color one frame before. The subject 87 represents the subject having the selected color two frames before, and the subject 86 represents the subject having the selected color three frames before. As the selected color is detected in the past, the color saturation is reduced by the coefficient of the coefficient unit 576, and can be displayed as a movement trajectory as shown. Further, regarding the locus display, the locus display period can be extended by the number of one-frame delay circuits.
[0048]
In the above description of the second and third embodiments, a circuit for realizing the above functions is added to the configuration of the first embodiment. However, a configuration in which the first, second, and third embodiments are combined at the same time may be adopted.
[0049]
In the description of the first, second, and third embodiments, digital processing is not particularly referred to. However, the output of the camera signal processing circuit 2 is sampled using an AD converter to perform digital processing. Is also good.
[0050]
【The invention's effect】
As described above, according to the video camera of the present invention, when the captured image is displayed on the video display device, the specified color of the target object is displayed at predetermined time intervals by specifying the characteristic color of the target object. By inverting and displaying a symmetrical color, the photographer can easily recognize the target subject.
[0051]
Furthermore, if the target subject is at the end of the angle of view at a predetermined time interval, if the period is changed, the photographer can be warned of the framing departure of the target subject.
[0052]
When the area of the designated color becomes smaller than the display screen due to the movement of the target subject, the target color is enlarged and then displayed in reverse with a symmetrical color. Can instantly know the position of the subject.
[0053]
Furthermore, by displaying the locus of the characteristic color of the target subject, the photographer can be instantaneously notified of the moving direction of the target subject.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration example of a video camera according to a first embodiment of the present invention.
FIG. 2 is an explanatory diagram of a method of selecting an arbitrary color of a subject in the video camera according to the first embodiment.
FIG. 3 is an explanatory diagram showing a relationship between a color difference signal and a color phase in each embodiment.
FIG. 4 is a block diagram illustrating a specific configuration example of a selection color detection circuit (part 1) according to the first embodiment;
FIG. 5 is an explanatory diagram of an operation of a selection color detection circuit.
FIG. 6 is a block diagram illustrating a specific configuration example of a selection color detection circuit (part 2) according to the first embodiment;
FIG. 7 is a block diagram illustrating a specific configuration example of a display control circuit in Embodiment 1.
FIG. 8 is an operation explanatory diagram of the display control circuit according to the first embodiment;
FIG. 9 is a display screen example showing the operation of the display control circuit according to the first embodiment.
FIG. 10 is a block diagram illustrating a configuration example of a display control cycle according to a second embodiment of the present invention.
FIG. 11 is a block diagram illustrating a configuration example of a vertical enlargement processing circuit according to a second embodiment;
FIG. 12 is an explanatory diagram of the operation of the selection color enlargement processing circuit according to the second embodiment;
FIG. 13 is a block diagram illustrating a configuration example of a display control circuit according to a third embodiment of the present invention.
FIG. 14 is a block diagram illustrating a configuration example of a trajectory display processing circuit according to a third embodiment;
FIG. 15 is an explanatory diagram of the operation of the trajectory display processing circuit according to the second embodiment.
[Explanation of symbols]
1 camera
2 Camera signal processing circuit
3 Recording / playback circuit
4 media
5,5B, 5C display control circuit
6 color selection circuit
7, 7A, 7B, 55 selection color detection circuit
8 Video display device
50 Selection color enlargement processing circuit
51 Multiplier
52,530,577 changeover switch
53 counter
54 AND circuit (AND)
57 Track display processing circuit
81 subject
82 Touch Panel
83 Selection area
84 Selection frame
85 Angle of view edge area
500 Vertical enlargement processing circuit
550 Horizontal enlargement processing circuit
502-507 delay circuit
511-515 selection color detection circuit
520 output selection circuit
570-573, 578-579 1-frame delay circuit
574 OR circuit (OR)
575, 704, 714, 724 Adder
576, 703, 713, 723 Coefficient unit
701, 702, 711, 712, 721, 722 LPF
705, 715, 725 Subtractor
706,707,716,717,726,727 Comparator
71,708,718,728 AND circuit (AND)

Claims (11)

Image display means for displaying an image of a camera image and a media playback image, and provided on the camera body;
Color selection means for selecting an arbitrary color from the subject by input;
Selection color detection means for detecting an area corresponding to the selection color selected by the color selection means from the video displayed on the video display means,
When changing the phase of the color signal with respect to the selected color of the area detected by the selected color detecting means and outputting an image having the color signal detected by the selected color detecting means to the video display means, And a display control means for alternately switching between the original color signal and the changed color signal at the time intervals described above to perform display control. The color selection means,
A touch panel arranged in front of the image display means,
When the touch panel is pressed, a selected color is detected based on a selected position of an image on the touch panel and a time phase of an image displayed by an image display unit, and a selected color holding memory holding a signal level of the selected color, The video camera according to claim 1, comprising: The color selection means,
When a subject of a specific color is contained in a part of a frame of a display area in the video display means, a memory for selecting a color in the frame and holding a signal level of the selected color is provided. The video camera according to claim 1, wherein: The selection color detection means,
2. The video camera according to claim 1, wherein the video camera detects whether or not the color signal of the image is within a predetermined ratio range based on two color difference signal levels of the selected color. The selection color detection means,
Detecting whether or not the color signal of the video is within a predetermined ratio range with reference to the two color difference signal levels of the selected color; and determining whether the luminance signal of the video is within a predetermined range with respect to the luminance signal level of the selected color area. 2. The video camera according to claim 1, wherein the video camera detects whether or not the video camera is inside the video camera. The display control means,
A color phase switching unit that switches between outputting a color signal of an image obtained by imaging based on the selected color detection signal output from the selected color detection unit as it is or outputting a signal whose color phase is inverted; ,
2. The video camera according to claim 1, wherein a switching cycle of said color phase switching means is made variable according to an angle of view position of a subject having a selected color set by said color selection means. Image display means for displaying an image of a camera image and a media playback image, and provided on the camera body;
Color selection means for selecting an arbitrary color from the subject by input;
Selection color detection means for detecting an area corresponding to the selection color selected by the color selection means from the video displayed on the video display means,
A selected color region enlarging unit that performs a delay and selection process for enlarging and displaying an area having the same selected color as the color selected by the color selecting unit around the area detected by the selected color detecting unit;
While changing the phase of the color signal of the area enlarged by the selected color area enlarging means and outputting an image having the color signal detected by the selected color detecting means to the image display means, at a predetermined time interval A video camera, comprising: display control means for alternately switching between an original color signal and a changed color signal for display control. The selection color area enlarging means includes:
Vertical image storage means for storing three or more lines of color difference signals of the input video in the vertical direction;
Horizontal image storage means for storing three or more pixels in the horizontal direction of the color difference signal of the input video,
8. The display area of the selected color is enlarged by copying a color difference signal level of the center pixel to upper, lower, left, and right pixels on a screen centering on a pixel portion where the selected color is detected. Video camera. The selection color area enlarging means includes:
8. The video camera according to claim 7, wherein an enlarged area is made variable according to the size of the area of the selected color. Image display means for displaying an image of a camera image and a media playback image, and provided on the camera body;
Color selection means for selecting an arbitrary color from the subject by input;
Selection color detection means for detecting an area corresponding to the selection color selected by the color selection means from the video displayed on the video display means,
Image storage means for integrating and storing the color difference signals of the area detected by the selected color detection means over a plurality of frames;
And a display control means for displaying the trajectory of the subject having the selected color over a plurality of frames. The image storage means,
11. The video camera according to claim 10, wherein in the new writing of the selected color area, an integrated value with a past pixel already stored is written.

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