JPS60141093A - Coloring device of picture - Google Patents

Abstract

PURPOSE:To allow easy coloring of a picture by converting a picture into a video signal, by inverting a negative picture into a positive one, by forming a profile picture from a video signal and by executing a coloring process on the basis of a profile picture so as to output a chrominance signal. CONSTITUTION:A video signal is inputted to a luminance signal (Y signal) separation circuit 20 where its Y signal is separated. The separated Y signal is differentiated in a differential circuit 22, and an edge part of an Y signal waveform is emphasized. A differential waveform is shaped in a full-wave rectifying circuit 24, and inputted to a comparator 26 where a comparating operation is carried out at a high speed. As a result, white or black area division of a profile part is executed. An output of the comparator 26 is converted into a digital signal by an A/D convertor 30 controlled by a microcomputer 32, outputted and stored in the microcomputer 32. The stored profile picture is displayed on a CRT42 by operation of a switch 38. A coloring operation of a picture is executed by the microcomputer 32.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image colorization device that pseudo-colors black and white so-called monochrome images (&+), which are recorded on black and white photographic film, for example. The present invention relates to an image coloring device for colorizing an image.

In the field of recent image processing devices such as video tape recorders and video cameras, images are recorded on a film by using an appropriate adapter for the film 11 that records images in an ordinary camera. A system has been proposed that displays images on a CRT or the like. For example, an image recorded on film (hereinafter referred to as a "still image") is first captured with a video camera using an appropriate adapter, and then the still image is played back on a CRT based on the video camera's image signal. and save it as an album.

Incidentally, the film on which still images are generally recorded is a so-called negative film, in which the original image is recorded in reverse. Therefore, to reproduce such still images, a negative/positive inversion circuit is required, and some video cameras have such a built-in circuit. If the negative film is in color, it is reproduced as a color still image, but if the negative film is in black and white, the reproduced image is a black and white monochrome image.

However, nowadays, color televisions are widely used, and black and white reproduced images no longer meet the demands of the times in terms of expressive ability and aesthetics.

The present invention has been made in view of this problem, and an object of the present invention is to provide an image coloring device that can pseudo-color an image.

Still another object of the present invention is to provide an image coloring device that can create a highly tasteful image by arbitrarily selecting colors when colorizing an image in a pseudo manner. be.

That is, the present invention provides a converting device for converting an image into a video signal, an inverting device for inverting the video signal into a positive image video signal if the image is a negative image, and a contour converting device for forming a contour image from the video signal. a generating device, a microcomputer that performs colorization processing based on a contour image and outputs a color signal, and a video signal forming device that forms a color video signal based on the color signal and a luminance signal separated from the video signal. It is characterized by having the following, and aims to achieve the above object with this J+.

Hereinafter, the present invention will be described in detail according to embodiments shown in the accompanying drawings.

FIG. 1 shows a circuit block diagram of an embodiment of an image coloring apparatus according to the present invention. In this figure, an imaging device (hereinafter simply referred to as "video camera") 0 is connected to a negative-positive inversion circuit (hereinafter simply referred to as "NP inversion circuit") 2. The video camera JO is further connected to a switch 14. are connected to terminals TA and T13, respectively.N
The P inverting circuit 12 connects the terminal 'I' of the switch 1, /I
, TI3, respectively.

The switch 14 has a first contact group ``1'' consisting of terminals 1'A, TC, and common terminal CA, and a second contact group consisting of terminals TA, TD, and common terminal CB. The contact groups are configured to be switched in conjunction with each other. That is, when the common contact CA is connected to the contact TA, the 5 common contact CD is connected to the contact T13, and the common contact C
When A is connected to contact TC, common contact CI3 is connected to contact 1
' Connected to D.

Next, the common contact CA is connected to a luminance signal separation circuit (hereinafter referred to as "Y signal separation circuit") 20 of the contour generation circuit 185. This Y signal separation circuit 20 separates a luminance signal (hereinafter referred to as "Y signal J") from the input video signal.
1 and a differentiating circuit 22, this synchronizing signal separating and erasing circuit 21 is connected to a microcomputer 32, and the differentiating circuit 22 is connected to an aftereffect rectifying circuit 24. Full-wave rectifier circuit 24 is connected to a non-inverting input terminal of comparator 26. The inverting input terminal of this comparator 26 is connected to a movable terminal of a variable resistor 28. resistance 28
One terminal is connected to an appropriate power source (not shown), and the other terminals are grounded. That is, the power supply voltage is appropriately divided by the resistor 28 and the comparator 26
The voltage is input to the inverting input terminal of the voltage converter, and this voltage is used as the reference for the comparison operation.

Comparator 26 is connected to A/11 converter 30. These circuits constitute a contour generating circuit 18.

The A/[] converter 30 is a microcomputer 32
The microcomputer 32 is further connected to a mixer 34. The coloring process is performed by the microcomputer 32.

On the other hand, the common terminal ACB is connected to the Y signal separation circuit 36.
The Y signal separation circuit 36 is connected to the synchronization signal separation circuit 35 and the mixer 34. The color signal output from the microcomputer 32 and the Y signal output from the Y signal separation circuit 36 are added by the mixer 34 in synchronization with the sync signal separated by the sync signal separation circuit 35, and the video signal is An NTSC signal is output.

The mixer 34 is connected to a terminal E of a switch 38, and is connected to an output device 4 such as a video tape recorder.
Connected to 0. The microcomputer 32 is connected to the terminal 1F of the switch 38, and the common terminal C
C is connected to CRT42. That is, CRT
42 are connected. That is, in CR1'42,
By changing the switch 38, the microcomputer 32
Either an image based on the signal output from the mixer 34 or an image based on the NTSC signal output from the mixer 34 (H+) is displayed.

Next, the overall operation of the embodiment described below will be explained from the beginning with reference to FIGS. 2 and 3 in addition to FIG. 1.

FIGS. 2A to 2D show an example of a positive or negative image and an example of an output signal of the video camera IO. FIGS. 3A to 3E) show examples of output signals from each part of the circuit shown in FIG. 1.

First, a case where the target image is a negative image of a negative film shown in FIG. 2(A) will be described. In this case, it is necessary to perform negative-positive inversion using the NP inversion circuit 12. Therefore, in the switch 14, the common contacts CA and CB are connected to the contacts 1'C21' and 1, respectively. For example, the output signal of the video camera 10 along line NN in FIG. 2(A) is as shown in FIG. 2(13). This signal is transferred to the third
As shown in Figure (A), the video signal is inverted into a positive image and is manually input to Jy and Y signal separation circuits 20 and 36, respectively.

Next, a case where the target image is a positive image as shown in FIG. 2(C) will be described. In this case, the NP inversion circuit 12 is not required. Therefore, in the switch 14, the common contact CA.

C11 is connected to contacts TA and i'B, respectively. For example, the output signal of the video camera 10 along the line pp in FIG. 2(C) becomes as shown in FIG. 2(1), and this video signal is input to the V signal separation circuit 20, 36, respectively. I do it. In this embodiment, since the images in FIGS. 2(A) and 2(n) have a negative-positive relationship, the video signals input to the Y signal separation circuit 20.36 are both Diagram (A) Yell.

The video signal shown in FIG. 3 (8) consists of Y signal m
1st eye ij 1st road 20 is manually operated, and here the Y signal is lit
A sign. The Y signal is differentiated by the differentiating circuit 22 and becomes as shown in FIG. 3 ([3). Through this operation, the edge portion of the Y signal waveform is emphasized. This is a type of contour correction, and the more drastic the change in the signal waveform, the more clearly the contour will be emphasized.

By changing the differentiation time constant of this differentiation circuit 22,
The detail of the screen division of the outline can be changed.

The differential waveform shown in FIG. 3(B) is rectified by the aftereffect rectifier circuit 24, and becomes as shown in FIG. 3(C). This waveform is generated by the comparator 2, which performs a high-speed comparison operation.
6 is input. As a result, the outline portion is divided into white or black areas. In this operation, the degree or fineness of the screen division based on the contour can be changed by changing the value of the reference voltage manually applied via the resistor 28, and the thickness of the contour line can also be changed.

The output of the comparator 26 is
It is converted into a digital signal by the /D converter 30 which is controlled by the microcomputer 32.
is output and stored. The contour image stored in the microcomputer 32 is transferred to the third
displayed on the CI+T 42 as shown in Figure (E). The microcomputer 32 performs the colorization work on the image. That is, a color is specified for each area divided by the outline.

This coloring work is performed according to the display of C1IT42. In other words, the processing information for processing the CRT4
2, and refer to this display as well.A
While doing so, colorization work is being carried out. The type of color is related to the performance of the microcomputer 32. Multiple colors are prepared in advance if necessary.

The above colorization work is stored in the microcomputer 32. That is, information regarding color is designated and stored in each area.

After the above operations are completed, color information, that is, a color signal, is input from the microcomputer 32 to the mixer 34. On the other hand, the Y signal output from the Y signal separation circuit 36 is synchronously input to the mixer 34. In the mixer 34, the color signal and the Y signal are synchronously combined and output as an NTSC signal. In detail,
The Y signal is an analog signal, whereas the color signal is a digital signal and is a coded signal representing the type of color. Therefore, in the mixer 311,
After the formats of the Y signal and color signal are adjusted, the two signals are combined.

On the other hand, the switch 38 switches the output of the mixer 34 to the CRT4
It is switched so that it is input to 2. by this,
A color image based on the NTSC signal output from the mixer 34 is displayed on the CRT 42.

Next, the surroundings of the microcomputer will be explained.

FIG. 4 shows a specific example of the configuration of the microcomputer 32 and devices required for colorization work. In this figure, the microcomputer 32 has a video RAM 50 in which information regarding contour and color images is stored.
The setting number is blank. The contour information stored in the video RAM 50 passes through the central processing unit ('CPU) 60, the output device 51, and is output to the C1IT 42 via the switch 38 as described above. The area of the outline image to be displayed on the CRT 42 is specified by area detecting means 52 such as a light pen, and the color to be applied is specified by color specifying means 54 such as a keyboard.

The information of the area detecting means 52 is sent to the CPU 60, where the color instruction for specifying the area can be similarly sent to the CPU 60 from the color specifying means 54, and this area information and the corresponding color information are sent to the CPU 60. is video RAM
50 appropriate areas.

The color generating device 58 is connected to the CPU 60 and its output is connected to the output device 51. In addition, the output device 51
In addition to the mixer 34 outside the color generating device 58 described above, the CP
It is also directly connected to U60. The CPU 60 also includes the area detecting means 52, the color specifying means 54, and the color generating device 5.
8. In addition to the output device 51 and video RAM 50, external A
/D converter 30, synchronous signal separation circuit 35, and synchronous signal separation/elimination circuit 21.

Next, the colorization work will be explained.

After the contour information of the target object is stored in the video PAM 50, the contour information is displayed on the CRT 42.

If the contour image at this time is not desirable to the operator, as described above, by changing the time constant of the differentiating circuit 22 or moving the variable resistor 28 that determines the reference voltage of the comparator 26, the axial contour image can be improved to some extent. can be changed. After the change, if a contour image that the operator is satisfied with is obtained by storing it in the video RAM 50 and displaying it on the CRT 42, the next step is to color it with the area detection means 52 without referring to the image displayed on the CRT 42. The area is designated and the color is designated by the color designating means 54. The color information corresponding to the specified area is immediately stored in the video RAM 50 by the CPII 60.
1- will be stored in an appropriate location. The stored color video information is passed from the video RAM 50 to the CPU 60.
The color generating device 58 and the output device 51 arrange the signal into a signal format that can be displayed on the C1I42 and display it. After seeing this, the operator repeats the work, specifies the color for the entire area, and finishes the work.

To obtain the final image, the mixer 34 combines the pure color signal 1 (transformation signal) sent from the Y signal separation circuit 3G and the color signal 5 produced by the micro combi coater system.
and is displayed on C111' 42J- by switching the common terminal CC of the switch 38 to the terminal 1'1z.

Furthermore, when outputting to something other than C old 12, the output device 40 is used to output to the outside.

Rough flowchart of microcomputer operation 1~
is shown in Figure 5.

Through the following two operations, colors are detected in each divided area forming the outline image. During this operation, the operator can arbitrarily select which color is to be applied to the second area from among the available colors. Therefore, with regard to coloring, an image rich in taste can be formed by the creativity of the operator.

It should be noted that the present invention is equally applicable to engraving a color image recorded on a color negative film. That is, since the axis and contour images serving as the reference for colorization are formed based on the Y signal, the target image is not limited to a black and white 1000-tone image. Therefore, the video camera may be a color video camera.

Furthermore, the circuits shown in the above embodiments are just examples, and other circuit configurations may be used as long as they have similar functions.

As described above, according to the present invention, it is possible to easily colorize an image, and by freely selecting colors in such colorization, it is possible to create an image rich in taste. It has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram showing an embodiment of an image coloring device according to the present invention, FIG. B
) is a waveform diagram showing an example of a video signal that has changed to the N-N line in Figure 2 (8), Figure 2 (C) is a plan view showing an example of a positive image, and Figure 2 (1)) is the same figure. A waveform diagram showing an example of a video signal along the P-P line in (C), Figure 3 (^) or D
) is a waveform diagram showing an example of the output signal of each part of the device shown in Fig. 1, 3-(E) is a front view showing an example of the contour image displayed on the C version, and Fig. 4 is a micro FIG. 5 is a circuit block diagram showing an example of a configuration of a computer and its peripheral parts, and is a flowchart -1- showing an example of a program for operating a microcomputer. 10. Video camera (conversion device). 12...Nl1 inversion circuit (inversion device), 18. Contour generation circuit, 20... Luminance signal separation circuit, 21... Synchronization signal separation and erasure circuit, 22... Differentiation circuit, 24. Aftermath rectification circuit, 2G...・Comparator, 30... A/D converter, : 12... Microcomputer, 34. Mixer (video signal forming device), : 1 -
11111 circuits for synchronous signals, 36...Y signal separation circuits,
42...CRT (display device), 50...Video RAI
(memory) 52...area designation means, 54.color designation means, 58..color signal generation device, 60.CPU (central processing unit) Fig. 2 Fig. 3

Claims (4)

[Claims] (1) A converting device for converting an image into a video signal, an inverting device for inverting the video signal into a positive image video signal in the case of an image, and a contour forming a contour image from the video signal. a generating device, a microcomputer that performs colorization processing based on a contour image and outputs a color signal, and a video signal forming device that forms a color video signal based on the color signal and a luminance signal separated from the video signal. An image color recording device comprising: (2) The axis generator includes a brightness signal separation circuit that separates a brightness signal from a video signal, and a synchronization circuit that erases a synchronization part from the separated brightness signal and outputs only the synchronization signal to a microcomputer. a signal separation/elimination circuit, a differentiation circuit for differentiating the separated luminance signal, a rectification circuit for rectifying the differentiated luminance signal, a comparator for comparing the rectified signal with a constant reference voltage, and a comparator for comparing the rectified signal with a constant reference voltage; An image coloring apparatus according to claim 1, further comprising an A/1 converter that outputs an output as a digital signal. (3) The image coloring device "q" according to claim 1 or 2, wherein the microcomputer is provided with a display device for displaying an outline image. (4) The microcomputer includes a memory in which information related to the outline image is stored, a color specifying means for specifying a color to be colored, a color signal output section for outputting a color signal corresponding to the specified color, and 5 coloring. an area specifying means for instructing an area to be processed based on a contour image displayed on a display device; an area detecting unit for detecting the specified area; and a procedure for effectively performing a desired process, and controlling each unit. 4. The image coloring apparatus according to claim 3, further comprising a central processing unit that performs the following steps.