JP7173256B2 - Drawing system and drawing control method - Google Patents

Description

The present invention relates to a drawing system and a drawing control method .

2. Description of the Related Art Conventionally, a drawing device for drawing a nail design on a fingernail, nail tip, or the like is known.
In such a device, unless the shape of the nail to be drawn is accurately detected, the nail cannot be drawn with high accuracy.
In particular, a nail, which is an object to be drawn by such a drawing device, has a curved shape in which the height decreases and the inclination increases toward both ends in the width direction.
For this reason, if a design image is drawn on the nail without considering this curved shape, the design will be distorted and the finish will not be beautiful.

In order to draw a distortion-free image on the nail, it is necessary to apply curved surface correction to the drawing data so as to match the curved shape of the nail.
Therefore, it is not possible to uniformly determine a correction value for correction, and it is necessary to perform correction according to the degree of curvature of the curved shape of each nail of the user.

Therefore, in order to know the curved shape of the nail, a camera for photographing the finger image is provided in the drawing device, and the surface of the nail is irradiated with light, and the reflected light is reflected from the normal direction of the nail region (the direction of the nail surface). A technique has been proposed for obtaining the curved shape of a nail, which is an object to be photographed, by photographing with a camera and examining the luminance intensity of surface reflected light of the nail in the photographed image.

JP 2017-55933 A

However, when a camera is provided in the drawing apparatus, the cost of the apparatus increases accordingly, and the wiring within the apparatus becomes complicated.
In addition, if the image recognition of the image taken by the camera and the generation of drawing data based on the recognition result are also performed by the drawing device, the various resources (for example, memory and reference files) necessary for calculation processing on the drawing device side (storage, etc.) must be prepared, which leads to an increase in cost and complication of the device.
Therefore, it is conceivable to photograph fingers and nails with a camera provided in the drawing device, send the obtained image to an external device, and perform image recognition and generation of drawing data based on the recognition result. . However, in this case, control signals and image data must be exchanged between the external device and the rendering device, which takes time, making it difficult to perform rapid rendering processing.

On the other hand, it is also conceivable to provide a sensor or the like for detecting whether or not a finger is set without providing a camera in the rendering device. However, it is not possible to accurately detect the shape of the nail, especially the curved shape in the width direction, and it is impossible to draw a precise drawing on the nail area. .

SUMMARY OF THE INVENTION The present invention has been made in view of the circumstances described above, and is a drawing system capable of accurately detecting the curved shape of a nail with a simple and inexpensive configuration, and capable of drawing a nail with high definition. and to provide a drawing control method .

In order to solve the above-described problems, the drawing system of the present invention includes a device main body having a drawing unit for drawing on a nail, and a device main body detachable from the device main body, and a finger having a nail to be drawn can be determined. and a jig placement section provided in the apparatus main body for fixing the fixing jig inserted from the outside to a predetermined position, wherein the fixing jig is the apparatus. After the finger fixed to the fixing jig is photographed from the distal end side by an external device in a state where it is not inserted into the main body, the fixing jig to which the finger is fixed is inserted into the jig placement portion. When fixed, the drawing unit controls drawing on the fingernail according to the curved shape of the fingernail in the nail width direction specified based on the image obtained by the photographing. and

According to the present invention, it is possible to accurately detect the curved shape of the nail with a simple and inexpensive configuration, and to perform high-definition drawing on the nail.

1 is a perspective view showing the overall configuration of a drawing system in this embodiment; FIG. 1 is a perspective view showing a main part of an internal configuration of a drawing apparatus according to this embodiment; FIG. (a) is a perspective view of the fixing jig of the present embodiment as seen from diagonally above, and (b) is a perspective view of the fixing jig of the present embodiment as seen from diagonally below. It is the schematic diagram which looked at the fixing jig from the front-end|tip side of the nail|claw. FIG. 4 is a plan view showing how a fixing jig is arranged in a jig arrangement portion; FIG. 4 is a plan view showing a state in which a fixing jig is arranged at a predetermined position of a jig arrangement portion; FIG. 2 is a block diagram of main parts showing the control configuration of the drawing system according to the embodiment; FIG. 6 is a graph showing the curved shape of the nail shown in FIG. 5 by the nail width and the level in the height direction of the nail; FIG. FIG. 4 is a schematic plan view showing an example of dividing the surface of the nail into areas according to the level of the nail in the height direction; 4 is a flowchart showing drawing processing of the drawing system according to the present embodiment;

An embodiment of a drawing system, a drawing device, and a terminal device according to the present invention will be described with reference to FIGS. 1 to 10. FIG.
Although various technically desirable limitations are attached to the embodiments described below for carrying out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.
Further, in the following embodiments, a nail print device in which the drawing device draws on a fingernail as a drawing target will be described as an example, but the drawing target of the drawing device in the present invention is limited to the fingernail. For example, a toe nail or a nail chip that is attached to the nail may be used as a drawing target.

First, the overall configuration of the drawing system according to this embodiment will be described.
FIG. 1 is a diagram showing a schematic configuration of the entire drawing system according to this embodiment.
As shown in FIG. 1, the drawing system 1 in the present embodiment includes a nail printing device 2 as a drawing device and a terminal device 7 capable of communicating with the nail printing device 2 .
In addition, in FIG. 1, a smart phone is imagined as the terminal device 7, but the terminal device 7 is not limited to a smart phone. For example, it may be a tablet personal computer (hereinafter referred to as "PC"), a notebook PC, a stationary PC, or the like. The terminal device 7 can be widely applied as long as it can communicate with the nail printing device 2 and has a camera function. For example, it may be a digital camera having a wireless communication function.
Further, communication between the nail printing device 2 and the terminal device 7 may use a network line such as the Internet, or may use a short-range wireless communication standard such as Bluetooth (registered trademark) or Wi-Fi. It may be one that performs wireless communication based on. When communicating via a network, the network used for communication may use any line.
Further, the communication between the nail printing device 2 and the terminal device 7 is not limited to wireless communication, and a configuration in which various data can be transmitted and received between the two via a wired connection may be employed.
The nail printing device 2 and the terminal device 7 constituting the drawing system 1 of this embodiment will be described in detail below.

First, the configuration of the nail printing device 2 of this embodiment will be described.
As shown in FIG. 1, a nail printing device 2, which is a drawing device in this embodiment, has a housing 21 formed in a substantially box shape.
An operation unit 22 is installed on the upper surface (top plate) of the housing 21 .
The operation unit 22 is an input unit through which a user performs various inputs.
The operation unit 22 includes operation buttons for performing various inputs, such as a power switch button for turning on the power of the nail printing device 2, a stop switch button for stopping the operation, and a drawing start button for instructing the start of drawing. It is

A display unit 23 is installed on the upper surface (top plate) of the housing 21 .
The display unit 23 is configured by, for example, a liquid crystal display (LCD), an organic electroluminescence display, or other flat display.
In this embodiment, the display unit 23 appropriately displays various instructions, messages, and the like, for example.
A touch panel for performing various inputs may be integrally formed on the surface of the display unit 23 . In this case, the touch panel functions as the operation unit 22 .

Furthermore, a finger insertion opening 28, which is an opening into which a finger is inserted when drawing with the nail printing device 2, is formed on the front side of the housing 21 (the front side in FIG. 1).
In this embodiment, a fixing jig 6, which will be described later, is inserted into and removed from the apparatus through the finger insertion opening 28 while the printing finger U1 and its nail T are fixed. For this reason, the finger insertion opening 28 is formed in a size that does not interfere when the fixing jig 6 to which the printing finger U1 and its claw T are fixed is inserted into and pulled out of the apparatus.
Here, the printing finger U1 is a finger having a nail T to be drawn by the drawing unit 40 .

FIG. 2 is a perspective view of essential parts showing the internal configuration of the nail printing device 2 with the housing 21 removed from the nail printing device 2 shown in FIG.
As shown in FIG. 2, inside the housing 21, there are provided a drawing unit 40 for drawing on the nail T of the printing finger U1, and a jig placement unit 50 for positioning the printing finger U1 and its nail T. there is

The drawing unit 40 moves the drawing head 41, which is the main body of the drawing unit, the unit support member 42 that supports the drawing head 41, and the drawing head 41 in the X direction (the X direction in FIG. 1 and the like, the lateral direction of the nail printing device 2). an X-direction moving stage 45, an X-direction moving motor 46, a Y-direction moving stage 47 for moving the drawing head 41 in the Y direction (the Y direction in FIG. It is configured to include a motor 48 and the like. In this embodiment, a head moving mechanism 49 (see FIG. 7) for moving the drawing head 41 is composed of the X-direction moving motor 46, the Y-direction moving motor 48, and the like.

The drawing head 41 of this embodiment is an inkjet head that performs drawing by an inkjet method.
The drawing head 41 is provided with ink cartridges (not shown) corresponding to, for example, yellow (Y; YELLOW), magenta (M; MAGENTA), and cyan (C; CYAN) inks, and a drawing target (the surface of the nail T) in each ink cartridge. It is an integrated ink cartridge head integrally formed with an ink ejection section (not shown) provided on the opposing surface (the lower surface in FIGS. 1 and 2 in this embodiment). The ink ejection section has a nozzle array consisting of a plurality of nozzles for ejecting inks of respective colors. Drawing is done by spraying ink directly on the surface. Note that the drawing head 41 is not limited to one that ejects the three colors of ink described above. An ink cartridge for storing other ink and an ink discharge section may be provided.

Also, the unit support member 42 is fixed to an X-direction moving part 451 attached to the X-direction moving stage 45 . The X-direction moving part 451 is driven by the X-direction moving motor 46 to move on the X-direction moving stage 45 along a guide (not shown) in the X direction. The drawing head 41 located there moves in the X direction (the X direction in FIG. 2, the lateral direction of the nail printing device 2).
Also, the X-direction moving stage 45 is fixed to the Y-direction moving part 471 of the Y-direction moving stage 47 . The Y-direction moving part 471 is driven by the Y-direction moving motor 48 to move on the Y-direction moving stage 47 along a guide (not shown) in the Y direction. The drawing head 41 located there moves in the Y direction (the Y direction in FIG. 2, the front-rear direction of the nail printing device 2).
In this embodiment, the X-direction moving stage 45 and the Y-direction moving stage 47 are configured by combining the X-direction moving motor 46, the Y-direction moving motor 48, and ball screws and guides (not shown).
In this embodiment, the X-direction movement motor 46, the Y-direction movement motor 48, and the like constitute a head movement mechanism 49 as an XY driving section that drives the drawing head 41 in the X and Y directions.

The drawing head 41, the X-direction movement motor 46, and the Y-direction movement motor 48 in the drawing section 40 are connected to and controlled by the drawing control section 313 (see FIG. 7) of the control device 30, which will be described later.

The communication unit 24 is configured to be able to transmit and receive information to and from the terminal device 7 .
As described above, the communication between the nail printing device 2 and the terminal device 7 may be based on any method, and the communication section 24 has an antenna chip or the like compatible with the communication method of the terminal device 7 .
The communication unit 24 is connected to a communication control unit 311 (see FIG. 7) of the control device 30 to be described later, and is controlled by the communication control unit 311 .

The jig placement unit 50 includes a finger placement table 53 having an upper surface plate 51 that forms an XY plane facing the ink ejection portion of the drawing head 41 and a support portion 52 that supports the upper surface plate 51 at a predetermined height position. I have.
A substantially U-shaped notch 511 that opens toward the front side of the device is formed in the upper plate 51 of the finger rest 53 at a substantially central portion in the width direction of the device (that is, the X direction in FIG. 2).
An inward flange portion 512 (see FIGS. 3A and 4) is formed in the notch portion 511 . As will be described later, the flange portion 512 functions as a guide portion that guides the fixing jig 6 to a predetermined position in the jig placement portion 50 .
Here, the "predetermined position" is on the XY plane (the XY plane orthogonal to the height direction of the nail T) within the movable range Ar (see FIGS. 5 and 6) of the drawing head 41 by the drawing unit 40. It is a position where a second reference mark F2 and the nail T, which will be described later, are arranged at positions suitable for drawing. XY direction) is the position at which the claw T is arranged substantially in the center.

In this embodiment, an example in which the flange portion 512 is provided over the entire circumference of the U-shaped notch portion 511 is shown (see FIG. 4), but the range in which the flange portion 512 is provided is this. is not limited to For example, the flange portions 512 may be provided only on both sides of the notch portion 511 in the X direction. Also, the flange portion 512 may not be continuously provided, and may be arranged in several divided portions.

A fixing jig 6 is arranged in the notch 511 of the upper plate 51 so as to be detachable from the apparatus main body of the drawing apparatus 2 .
The fixing jig 6 is configured to be able to fix the printing finger U1, which is the finger having the nail T to be drawn by the drawing unit 40, so that the nail T is exposed from the tip side.
Here, the configuration of the fixing jig 6 in this embodiment will be described in detail with reference to FIGS. 3(a), 3(b), and 4 to 6.
FIG. 3(a) is a perspective view of the fixing jig according to the present embodiment when viewed obliquely from above, and FIG. 3(b) is a perspective view of the fixing jig according to the present embodiment when viewed obliquely from below. is a perspective view of the. Moreover, FIG. 4 is a schematic plan view of the fixing jig 6 when viewed from the toe side.
Further, FIG. 5 is a plan view showing how the fixing jig is arranged in the jig placement section, and FIG. 6 is a plan view showing the state in which the fixing jig is arranged at a predetermined position in the jig placement section. is.

As shown in FIGS. 3A and 3B, the fixing jig 6 includes a finger placement member 61 on which the printing finger U1 is placed, a cover member 62, and the finger placement member 61 as a cover member. and a biasing member 63 that biases toward the 62 side.
In this embodiment, as shown in FIGS. 3(a), 3(b) and 4, the fixing jig 6 includes a cover member 62 which is an upper case formed substantially in the shape of a box, and a cover member 62 which is also substantially box-shaped. A finger resting member 61 and an urging member 63 for urging it are arranged in a space formed by a shaped lower case 64 .

The finger placement member 61 is a plate-shaped member on which the finger of the nail T to be drawn (printing finger U1) is placed.
FIG. 3A, FIG. 3B, and FIG. 4 show the finger placement surface of the finger placement member 61 (upper surface in FIG. 3A and the like) on which the printing finger U1 is placed. In this way, it is preferable to form a shape having an arcuate cross-section so that when the printing finger U1 is placed thereon, it conforms to that shape.
Locking projections 611 are formed to protrude from both sides of the finger placing member 61 in the width direction. The locking projection 611 is movable in the vertical direction (the vertical direction in FIG. 3A and the like) along a guide groove 625 of the cover member 62 which will be described later.
As described above, the locking protrusion 611 is guided along the guide groove 625, so that the finger placing member 61 is moved in the direction of contacting and separating from the cover member 62 (that is, in the vertical direction in FIG. 3A and the like). ).

One end of the urging member 63 is provided on the back side of the finger rest member 61 (that is, the surface opposite to the finger rest surface, the lower surface in FIGS. 3A and 3B, etc.). side is locked.
The other end side of the biasing member 63 is engaged with, for example, the inner bottom surface of the lower case 64 .
In this embodiment, the biasing member 63 is a coil spring.
The urging member 63 urges the finger placing member 61 upward.
Note that the biasing member 63 is not limited to a coil spring, and can be applied as long as it is elastically deformable and has a restoring force.

As shown in FIG. 3A and the like, the cover member 62 is located on the front side in the printing finger insertion direction (that is, the fixing jig 6 is arranged in the cutout portion 511 of the top plate 51 of the finger placing table 53 on the apparatus main body side). The front side of the device in the closed state) is open.
A window portion 621 for exposing the nail T of the printing finger U1 fixed by the fixing jig 6 is provided on the upper surface of the cover member 62 and on the far side in the direction in which the printing finger is inserted. is fixed to the fixing jig 6, the printing finger U1 is fixed so that the nail T is exposed from the toe side.

Further, on the upper surface of the cover member 62 and on the front side in the printing finger insertion direction, there is a finger pressing portion 622 that prevents the printing finger U1 from being too high.
As shown in FIGS. 3(a) and 3(b), a concave portion 623 is formed in the inner surface of the finger pressing portion 622 of this embodiment. A cushioning member 624 made of a soft resin or the like with a certain thickness is arranged.
By providing a cushioning member 624 on the part of the finger pressing portion 622 with which the upper side of the printing finger U1 abuts (that is, the inner surface of the finger pressing portion 622 which is the upper surface of the cover member 62), the printing finger U1 is pushed up and the finger pressing portion 624 is pressed. It becomes difficult to feel the impact and pain when the part 622 is hit, which is preferable.
Note that the configuration of the finger pressing portion 622 is not limited to the one illustrated here, and for example, a simple plate-like one without the cushioning member 624 or the like may be used.

Further, as shown in FIGS. 3A and 3B, on both inner side surfaces of the cover member 62, when the finger placing member 61 moves up and down, the finger placing member 61 moves up and down (see FIG. 3 ( A guide groove 625 is formed for guiding in a) and the vertical direction in FIG. 3B).
The guide groove 625 extends in the vertical direction (longitudinal direction) of the cover member 62, and its lower end (that is, the position farthest away from the cover member 62) extends to the near side in the printing finger insertion direction. It is L-shaped, and the portion extending forward in the printing finger insertion direction serves as a projection locking portion 626 for locking the locking projection 611 of the finger placement member 61 .
When the locking projection 611 of the finger resting member 61 is moved to the upper end of the guide groove 625, it is locked at that position and does not rise any further. It also functions as a stopper that defines the highest point of 61.

Further, the guide groove 625 has a shape that gradually inclines toward the lower end portion where the projection locking portion 626 is provided, so that when the finger placing member 61 descends to the lowest point, The locking projection 611 of the member 61 is guided into the projection locking portion 626 along the guide groove 625 .
By disposing the locking projection 611 of the finger mounting member 61 in the projection locking portion 626, the finger mounting member 61 is held at the lowest position against the biasing force of the biasing member 63. Thus, when inserting the printing finger U1 into the fixing jig 6, a wide insertion opening can be secured.
As described above, in the present embodiment, the locking protrusion 611 provided on the finger placing member 61 and the protrusion locking portion 626 provided on the cover member 62 for locking the locking protrusion 611 allow the finger mounting member to be held. A lock mechanism is configured to lock the cover member 61 at a position spaced apart from the cover member 62 .

Further, the cover member 62 has an opening on the lower surface side, and an outward flange portion 622 is formed along the peripheral edge of this opening portion.
Further, the lower case 64 has an opening on the upper surface side, and an outward flange portion 642 is formed along the periphery of this opening.
In this embodiment, in the assembled state, the fixing jig 6 is fitted onto the lower case 64 with the cover member 62 facing downward, and the cover member 62 and the outward flange portion 622 of the lower case 64 are fitted together. , 642 are superimposed on each other, and the outward flange portions 622 and 642 are fixed by a method such as adhesion. Then, the portion where the outward flange portions 622 and 642 are fixed and integrated in this manner becomes the locking projecting portion 65 . Note that the method of fixing the outward flange portions 622 and 642 is not limited to adhesive fixing. For example, it may be fixed by screwing, welding, or the like.

As shown in FIG. 4, the fixing jig 6 of the present embodiment has a first reference mark F1 on the outer end face on the toe side, which serves as a reference for the claw T in the height direction.
In this embodiment, the first reference mark F1 is provided on the outer end face of the lower case 64 on the toe side, and extends in the width direction of the nail T when the printing finger U1 is fixed in the fixing jig 6. The mark has a rectangular shape (in this embodiment, a rectangular shape elongated in the width direction of the nail T).
By forming the first reference mark F1 into a rectangular shape, the first reference mark F1 has a certain width, and compared with the case where the first reference mark F1 is composed of lines, etc., the image is Processing makes it easier to recognize accurately.
The rectangle forming the first reference mark F1 has a long side longer than the length dimension assumed as the finger width of the printing finger U1 (for example, about 20 to 30 mm), and the midpoint of the long side is It is near the center in the width direction of the printing finger U1 set on the fixing jig 6 . Moreover, it is desirable that the length of the short side of the rectangle is about the height of the expected nail T (for example, 3 to 10 mm). However, the size and shape of the first reference mark F1 are not limited to the illustrated example. In the present embodiment, the photographing unit 73 of the terminal device 7, which will be described later, photographs the fixing jig 6 to which the printing finger U1 is fixed from the tip side of the nail T, and the first A first image including the fiducial mark F1 and the nail T is acquired. As will be described later, the detection processing unit 814 detects the position of the first reference mark F1 and the upper surface position of the nail T from this first image, and detects the curved shape of the nail T in the nail width direction. At this time, the position of the first reference mark F1 is determined by, for example, using the upper long side of the first reference mark F1 as a reference, and obtaining the distance from the long side to the upper surface of the nail T from the first image. Detect the height of the top surface of T.

It should be noted that the first reference mark F1 is the outer end face on the toe side, and can be included in one screen together with the claw T when the photographing unit 73 photographs the fixing jig 6 from the tip side of the claw T. It is not limited to being provided on the outer end surface of the lower case 64 on the toe side.
Also, the shape of the first reference mark F1 may be any shape that can be accurately recognized by image processing, and is not limited to a rectangle, and may be a square or the like.
Further, in the present embodiment, the case where the first reference mark F1 is rectangular is exemplified. not. For example, the first reference mark F1 may be composed of indicators such as a line or a plurality of points.

The fixing jig 6 has a second reference mark F2 (see FIGS. 5 and 6) that serves as a reference for setting the drawing area by the drawing unit 40, and fixes the printing finger U1.
FIG. 5 is a plan view showing how the fixing jig is set in the cutout portion of the top plate of the finger placing table of the jig placement section, and FIG. 6 is the setting jig set in the cutout portion of the top plate. FIG. 10 is a plan view showing a folded state;
As shown in FIG. 5, when the fixing jig 6 is arranged in the cutout portion 511 of the upper surface plate 51 of the finger placement table 53 of the jig placement portion 50, the locking projecting portion 65 is aligned with the cutout portion. 511 is placed on the upper surface of the flange portion 512 . Then, the engagement projecting portion 65 is guided along the upper surface of the flange portion 512 as a guide portion until the rear side of the engagement projecting portion 65 abuts against the depth side of the notch portion 511 . As a result, the nail T and the second reference mark F2 can be smoothly moved to a predetermined position, which is a position suitable for drawing.
Note that the configuration for accurately arranging the fixing jig 6 at a predetermined position in the jig arranging portion 50 is not limited to this. For example, a guide groove or a guide protrusion that is engaged with the guide groove is provided on the outer surface of the locking projecting portion 65, and the locking projecting portion 65 is provided at a corresponding position on the inner surface of the notch portion 511. A guide projection or guide groove corresponding to the guide groove or guide projection is provided, and the guide projection is guided along the guide groove, so that the fixing jig 6 is always accurately positioned in the jig placement portion 50. may be configured to be placed in

As shown in FIGS. 5 and 6, in this embodiment, the outer circumference of the locking protrusion 65 is the outer circumference of the fixing jig 6, and the outer circumference of the fixing jig 6 sets the drawing area of the drawing section 40. It becomes the second reference mark F2 that serves as a reference.
Specifically, indicators 651 that define the second reference marks F2 are provided at the intersections of the sides forming the outer periphery of the locking projection 65 (that is, the four corners of the locking projection 65). is provided. The indicator 651 is provided, for example, by printing or pasting a sticker. A detection processing unit 814 of the terminal device 7, which will be described later, detects this index 651 and detects the position of the second reference mark F2 from this index 651. FIG.

The second reference mark F2 is within the movable range Ar, which is the range in which the drawing unit 40 can draw on the upper surface plate 51 of the finger rest 53, and is outside the portion where the nail T is arranged. , and is not limited to the case where it coincides with the outer circumference of the locking projecting portion 65 . The second reference mark F2 may be set inside the outer circumference of the locking projecting portion 65 .
Moreover, the shape of the second reference mark F2 may be any shape that can be accurately recognized by image processing, and is not limited to a rectangle, and may be a square.
Further, in this embodiment, the case where the second reference mark F2 has a frame shape is exemplified. not.
As will be described later, in the present embodiment, the detection processing unit 814 detects the second reference mark F2 and appropriately performs keystone correction. In this trapezoidal correction, it is preferable that the second reference mark F2 has a frame shape.
Also, the index 651 may be anything as long as it can be detected by the detection processing unit 814 of the terminal device 7, and its shape, the number of provided, etc. are not limited to the illustrated example. For example, the index 651 may be "■", "□", "●", "○", brackets, or a combination thereof. Also, the indicator 651 may be a line-shaped one or the like drawn along the second reference mark F2. When the index 651 is linear, it may extend over the entire circumference of the second reference mark F2, or may be provided partially. Furthermore, the range of the second reference mark F2 may be indicated by color-coding the inside and outside of the second reference mark F2.

Next, the control configuration of the nail printing device and the terminal device that constitute the drawing system will be described with reference to FIG. 7 and the like.
FIG. 7 is a block diagram showing the main part control configuration of the nail printing device 2 and the terminal device 7 that constitute the drawing system 1 of this embodiment.
As shown in FIG. 7, the nail printing device 2 of this embodiment includes the operation unit 22, the display unit 23, the communication unit 24, and the drawing unit 40 as described above, and also includes the control device 30. FIG.

As shown in FIG. 7, the control device 30 includes a control unit 31 including a CPU (Central Processing Unit) (not shown) and the like, and ROM (Read Only Memory) and RAM (Random Access Memory) (not shown). It is a computer provided with a storage unit 32 .

The storage unit 32 stores various programs and data for operating the nail printing device 2 .
Specifically, the ROM stores various programs such as a drawing program for performing drawing processing. The drawing section and the like of the printing device 2 are controlled.

From a functional point of view, the control unit 31 includes a communication control unit 311, a display control unit 312, a drawing control unit 313, and the like. The functions of the communication control unit 311 , the display control unit 312 , the drawing control unit 313 and the like are realized by cooperation between the CPU of the control unit 31 and the programs stored in the ROM of the storage unit 32 .

The communication control section 311 controls the operation of the communication section 24 . In this embodiment, communication with the terminal device 7 is controlled, and when drawing data or the like is transmitted from the terminal device 7, it is received. If a trouble occurs during drawing on the nail printing device 2 side, or if there is a change in the operation state, the effect may be sent to the terminal device 7 side.

The display control unit 312 controls the display unit 23 to display various display screens on the display unit 23 . In this embodiment, the display control unit 312 causes the display unit 23 to display, for example, messages and various instructions to the user.

When drawing data is transmitted from the terminal device 7, the drawing control section 313 controls each section of the drawing section 40 to perform a drawing operation according to the drawing data, thereby drawing a nail design on the surface of the nail T. draw.
Specifically, the drawing control unit 313 outputs a control signal to the drawing unit 40 based on the drawing data, and draws at a predetermined position on the nail T while appropriately moving the drawing head 41 in the X direction and the Y direction. The drawing head 41, the X-direction moving motor 46, the Y-direction moving motor 48, etc. of the drawing unit 40 are controlled so as to perform drawing according to the data.
In addition, in the present embodiment, the drawing control unit 313 performs offset value correction before the drawing processing by the drawing unit 40 is started.
In order to set the area where drawing is actually performed (that is, the nail area), the second reference mark F2 of the fixing jig 6 with respect to the XY scanning area (that is, the movable range Ar of the drawing head 41) in the nail printing device 2 However, the information indicating the positional relationship between the two (positional relationship information) is a device-specific value that depends on the mechanical design requirements, processing accuracy, etc. of each nail printing device 2. (offset value).
In the present embodiment, it is assumed that this positional relationship information has been acquired in advance by the device. When the drawing control unit 313 acquires the drawing data from the terminal device 7, the drawing control unit 313 corrects the position of the nail T (nail region) based on this positional relationship information.

Here, offset value correction by the drawing control unit 313 will be described in detail with reference to FIG. 6 and the like.
As shown in FIG. 6, the XY coordinate system includes the coordinate system of the XY scanning region based on the movable range Ar of the drawing head 41 of the drawing unit 40 in the nail printing device 2, and the printing finger U1 and nail T. There are two types of coordinate systems, namely, the coordinate system in the fixing jig 6 to be used.
The coordinate system of the XY scanning area in the nail printing device 2 is an area surrounded by "GA, GB, GC, GD" with the origin at "GA" (that is, the point on the left rear side of the movable range Ar) in FIG. is. In this embodiment, the drawing head 41 can scan and move in the XY directions within this range. However, the area that can actually be drawn by the drawing head 41 is within the second reference mark F2.
On the other hand, the coordinate system of the fixing jig 6 for fixing the printing finger U1 and the nail T has "NA" (that is, the point on the far left side of the second reference mark F2) as the origin in FIG. NB, NC, and ND”.

As shown in FIG. 6, the origin "NA" of the coordinate system in the fixing jig 6 becomes "GN" (gx1, gy1) in the coordinate system of the XY scanning area in the nail printing device 2, and this coordinate point is It is a device-specific value (offset value) determined by mechanical design elements.
Here, the dimension of the second reference mark F2 is known in the nail printing device 2, and the coordinate system (origin "GA") of the XY scanning area in the nail printing device 2 and the fixing jig 6 are calculated based on this actual dimension. The coordinate system in (origin "NA") is both scaled.
Assuming that the scale has been adjusted as described above, each point of "NA, NB, NC, ND" in the coordinate system of the fixing jig 6 is offset by the coordinate system of the XY scanning area in the nail printing device 2. When expressed in consideration, NA is (gx1, gy1), NB is (gx1, gy1+ny3), NC is (gx1+nx3, gy1+ny3), and ND is (gx1+nx3, gy1).
The drawing control unit 313 corrects the offset value by replacing the drawing data received from the terminal device 7 with coordinates in consideration of the offset value. As a result, drawing can be applied to the correct nail region that reflects individual differences for each device.

Further, as shown in FIG. 7, the terminal device 7 of the present embodiment is configured to be able to communicate with the nail printing device 2 which is a drawing device, and includes an operation unit 71, a display unit 72, a photographing unit 73, A communication unit 74, a control device 80, and the like are provided.

The terminal device 7 of this embodiment includes a capacitive touch panel 70 that functions as an operation unit 71 and a display unit 72 .
The touch panel 70, which is the operation unit 71, can perform various operations such as input and setting according to the user's touch operation. When the operation unit 71 is operated, an input corresponding to the operation A signal is sent to the control unit 81 . Note that the operation unit 71 is not limited to the touch panel 70 . For example, various operation buttons, a keyboard, a pointing device, etc. may be provided as the operation unit 71 .
In this embodiment, the user can select a nail design to be drawn on the nail T by operating the operation unit 71 .

The touch panel 70, which is the display unit 72, displays various display screens under the control of the display control unit 812, which will be described later.
In the present embodiment, the display unit 72 displays the nail design input/selected by the user from the operation unit 71, the nail T acquired by the imaging unit 73, the image of the printing finger U1 including the nail T, and the first reference mark F1. , an image of the second reference mark F2, etc., can be displayed.

The photographing unit 73 is, for example, a compact camera configured with an imaging element, a lens, a lighting device (for example, an LED), and the like (none of which are shown).
Note that the photographing unit 73 may have a self-timer function, an audio shutter function, and the like. These functions may be used when the user himself/herself takes an image of his/her own finger, such as when it is not possible to ask someone else to take an image. By using such a function, it is possible to easily photograph a finger of a dominant hand.
Also, the photographing unit 73 is not limited to one that photographs a still image. For example, moving images may be captured, and images at appropriate timings may be extracted as still images from the continuously captured data and used.
In this embodiment, the photographing unit 73 photographs the fixing jig 6 to which the printing finger U1 is fixed from the tip side of the nail T outside the nail printing apparatus 2, and captures the first image provided on the fixing jig 6. A first image including fiducial mark F1 and nail T is acquired. Further, the photographing unit 73 photographs the fixing jig 6 to which the printing finger U1 is fixed from directly above the nail T outside the nail printing apparatus 2, and captures the second reference mark provided on the fixing jig 6. A second image containing F2 and nail T is acquired.
Note that the number of times the first image and the second image are captured is particularly limited, and the capturing unit 73 may capture the first image and the second image a plurality of times, respectively.
The photographing unit 73 is connected to a photographing control unit 813 (see FIG. 7) of the control device 80 to be described later, and is controlled by the photographing control unit 813 .
The first image and the second image are preferably captured under the same imaging conditions such as the angle of view and the number of pixels, and are preferably obtained by the same imaging unit 73 .
The image data of the image captured by the imaging unit 73 is stored in the nail information storage unit 823 of the storage unit 82, which will be described later.

The communication unit 74 is capable of transmitting drawing data to the nail printing device 2 and includes a wireless communication module or the like capable of communicating with the communication unit 24 of the nail printing device 2 .
Note that the communication unit 74 may be any unit that can communicate with the nail printing device 2, and a communication standard that matches the communication standard of the communication unit 24 of the nail printing device 2 is applied.

As shown in FIG. 7, the control device 80 of the terminal device 7 of the present embodiment includes a control unit 81 configured by a CPU (Central Processing Unit) not shown, ROM (Read Only Memory) and RAM (Random It is a computer provided with a storage unit 82 configured by an access memory or the like.

The storage unit 82 stores various programs, various data, and the like for operating each unit of the terminal device 7 .
Specifically, in the ROM or the like of the present embodiment, in addition to an operation program 821a for centrally controlling each part of the terminal device 7, a nail print application program 821b ( hereinafter referred to as "nail print AP"), etc.), and the terminal device 7 is controlled by the control device 80 developing these programs in the work area of the RAM, for example, and executing them. It has become.
Further, the storage unit 82 of the present embodiment is provided with a design storage unit 822 for storing nail design data, a nail information storage unit 823 for storing information such as the image of the nail T and the position/range of the nail T, and the like. ing.

Functionally, the control unit 81 includes a communication control unit 811, a display control unit 812, an imaging control unit 813, a detection processing unit 814, a drawing data generation unit 815, and the like. The functions of the communication control unit 811, the display control unit 812, the imaging control unit 813, the detection processing unit 814, the drawing data generation unit 815, etc. Realized through collaboration.

The communication control section 811 controls the operation of the communication section 74 . In this embodiment, communication with the nail printing device 2 is controlled, and drawing data and the like are transmitted to the nail printing device 2 . When information is also transmitted from the nail printing device 2 side, the communication unit 74 is controlled to receive the information.

The display control unit 812 controls the display unit 72 to display various display screens on the display unit 72 .
In this embodiment, the display control unit 812 causes the display unit 72 to display a design selection screen prompting the user to select a nail design to be drawn on the nail T, for example. When displaying the design selection screen, the display control unit 812 causes the display unit 72 to display the nail designs stored in the design storage unit 822 in sequence or in list form.
Further, when the first image and the second image obtained by photographing the nail T, the first reference mark F1, and the second reference mark F2 are obtained by the photographing unit 73, the display unit 72 displays the first image and the second image. may
Furthermore, the display control unit 812 causes the display unit 72 to display an image in which the nail design selected by the user is superimposed on the image of the nail T, so that the user can check the finished image before the actual drawing is started. If not, the nail design may be reselected.
In addition, the display control unit 812 may cause the display unit 72 to display messages, various instructions, and the like for the user.

The shooting control unit 813 controls the shooting unit 73 to perform various shootings.
In this embodiment, the photographing is performed with the fixing jig 6 arranged outside the nail printing device 2 .
When lighting is required due to the position of the fixing jig 6 or the like, the light (illumination device) of the photographing unit 73 may be turned on to perform photographing with illumination.
In this embodiment, the imaging control unit 813 controls the imaging unit 73 to combine the printing finger U1 (and its nail T) fixed to the fixing jig 6 and the first reference mark F1 into one image. An image is acquired by photographing from the tip end side of the nail in the fixing jig 6 so as to fit in the inside.
In addition, since the positional relationship between the first reference mark F1 and the device main body of the nail printing device 2 is grasped by the device side, if there is a deviation in the shooting direction, inclination, etc. at the time of shooting, , the first reference mark F1, etc. can be used for correction and adjustment.
Further, in this embodiment, the imaging control unit 813 controls the imaging unit 73 to align the printing finger U1 (and its nail T) fixed to the fixing jig 6 with the second reference mark F2. An image is acquired by photographing from above the fixing jig 6 so as to fit in one image.
Note that the positional relationship between the second reference mark F2 and the device main body of the drawing device 2 is also grasped by the device side. , the second reference mark F2, etc. can be used for correction and adjustment.

The detection processing unit 814 is a functional unit that performs various types of image processing. Detects curved shapes in the width direction.
That is, the detection processing unit 814 first detects the position of the first reference mark F1 and the upper surface position of the nail T from the first image acquired by the imaging unit 73 .
As shown in FIG. 4, in this embodiment, the claw height Z is the distance from the upper long side of the first reference mark F1 to the upper surface of the claw T. As shown in FIG. The distance from the first reference mark F1 to the claw height Z may be defined as appropriate. Alternatively, the claw height Z may be the distance from the center line in the height direction of the first reference mark F1 to the upper surface of the claw T. FIG.
In this embodiment, it is preferable that the positional relationship between the first reference mark F1 and the second reference mark F2 is predetermined and fixed. When each point of the contour defining the range of the nail T (that is, the nail region) is detected from the second image photographed from directly above T, the detection processing unit 814 detects the upper side of the first reference mark F1. The distance from the long side to each point of the contour defining the nail area is determined from the first image.

FIG. 8 is a graph showing the curved shape of the claw shown in FIG. 4 by the claw width and the level in the claw height direction.
In FIG. 8, the horizontal axis represents the position in the X direction (that is, the direction of the nail width W) in FIGS. The claw height Z, which is the distance from the surface (upper surface) of the claw T to the upper long side of the first reference mark F1, is divided into three levels of Z values. , which is plotted on the vertical axis.
Also, FIG. 9 is a schematic plan view showing an example of drawing areas obtained by dividing the surface of the nail according to the level of the nail height Z. As shown in FIG.
As shown in FIG. 8, the surface (upper surface) of the claw T has the highest claw height Z at the central portion and is relatively flat. is in a hurry.

In the present embodiment, as shown in FIGS. 8 and 9, both ends in the nail width direction are defined as an inclined area Ar1 having a steep inclination angle, and this range is an area of width w1R from the right end in the nail width direction in the drawing area. , and a width w1L from the left end in the claw width direction.
Further, the central portion in the nail width direction is defined as a relatively flat flat region Ar3 having a high nail height, the region between the inclined region Ar1 and the flat region Ar3 is defined as an intermediate region Ar2, and this range is defined as the drawing region in the nail width direction. A region with a width w2R between the right side sloped region Ar1 (a region with a width w1R from the right end) and the flat region Ar3, and a left side sloped region Ar1 in the nail width direction (a region with a width w1L from the left end) and the flat region A region of width w2L between Ar3. The range of the intermediate area Ar2 in the drawing area can be expressed by w/2-(w2L+w1L) on the right side from the center in the nail width direction, and by w/2-(w2R+w1R) on the left side.

The detection processing unit 814 analyzes the area on the left side and the area on the right side of the center in the nail width direction for the nail area, and FIG. 9 shows a state in which the left and right analysis results are combined at the center.
In the present embodiment, the Z-value ratio B1, B2 (B1<B2) is used to divide the nail area in the drawing area into the inclined area Ar1, the intermediate area Ar2, and the flat area Ar3.
That is, in the present embodiment, the detection processing unit 814 subdivides the nail region in the drawing region into vertically elongated regions along the Y-axis, and calculates the average reflected luminance of each small region as the scale of the maximum value of the region. Normalize to match. Then, an area higher than the constant Z value ratio B2 is divided into a flat area Ar3, an area lower than the constant Z value ratio B1 is divided into an inclined area Ar1, and an area located in the middle is divided into an intermediate area Ar2.

Further, the detection processing unit 814 detects the position of the second reference mark F2 and the area of the nail T from the second image acquired by the photographing unit 73 photographing the fixing jig 6 from directly above. .
The detection processing unit 814 first detects the index 651 from the image acquired by the imaging unit 73 and detects the second reference mark F2 from the position of this index 651 . In the present embodiment, indicators 651 are provided at four corners of the locking projection 65 that match the outer periphery of the second reference mark F2, and the detection processing unit 814 detects the positions of the indicators 651, A quadrangle (a rectangle in this embodiment) having these four indices 651 as vertices is detected as the second reference mark F2.
Furthermore, the detection processing unit 814 performs trapezoidal correction on the detected second reference mark F2.
In this embodiment, the photographing is performed with the fixing jig 6 arranged outside the nail printing device 2 . For this reason, it is conceivable that the photographing unit 73 does not photograph from directly above the fixing jig 6, but from a deviated angular position. In such a case, the second reference mark F2, which should be rectangular in plan view, may not be photographed in the correct shape, and may be photographed in a distorted or tilted trapezoidal shape. Even in such a case, since the apparatus knows that the shape of the second reference mark F2 when viewed from directly above is rectangular, correction is performed to convert this into a rectangular shape. In addition, camera shake or the like may occur at the time of photographing, but in this case, by performing camera shake correction as appropriate in the detection processing unit 814, an image without blur can be obtained.
Then, the detection processing unit 814 converts the XY coordinate point data of the four corners (NA, NB, NC, and ND in FIG. 5) of the second fiducial mark F2 to the coordinate point data of the reference point of the second fiducial mark F2 (Fig. 5 as NA (nx0, ny0), NB (nx0, ny3), NC (nx3, ny3), ND (nx3, ny0)).

Further, the detection processing unit 814 recognizes the contour shapes of the printing finger U1 and the nail T from the image acquired by the imaging unit 73, and obtains XY coordinate point data for the reference point of the second reference mark F2.
As a method for recognizing the outline shape of the printing finger U1 and the nail T from the image, a method such as determining the boundary by the difference in color tone can be used, but the method is not limited to this.
Furthermore, when a plurality of images are acquired from various angular positions by the photographing unit 73, the detection processing unit 814 may obtain the curvature of the nail T and the like from the plurality of images.
The image processing for recognizing the second reference mark F2 and the image processing for recognizing the contour shapes of the printing finger U1 and the nail T may be performed from the same image, or the trimming settings and filtering settings may be changed. You may process using the separate image which carried out.

The drawing data generation unit 815 sets the drawing area by the drawing unit 40 based on the detection result of the detection processing unit 814 and generates drawing data.
That is, as shown in FIG. 5, when the length of the nail T detected by the detection processing unit 814 is ny1 to ny2 and the nail width is nx1 to nx2, the nail region is inside the second reference mark F2. It is an area within (nx1, ny1) to (nx2, ny2).
The drawing data generation unit 815 cuts out the image data of the nail design selected by the user who is the drawing target in accordance with the shape of the nail region (the contour shape of the nail T), performs scaling as appropriate, and calculates the second reference. Region filling data is created for the nail region, which is the drawing region within the mark F2. Then, blank data (data indicating a non-drawing area) is arranged outside the nail area in the second reference mark F2. This completes the generation of drawing data composed of blank data in the second rectangular reference mark F2 and region filling data in the nail region.
The data processing procedure is the same when drawing data is generated for a finger area, which is an area of a printing finger instead of a nail area.
The drawing data generated by the drawing data generation unit 815 is transmitted to the nail printing device 2 via the communication unit 74 .

Next, the operation of the drawing system 1 of this embodiment will be described with reference to FIG. 10 and the like.
When drawing a nail design on the nail T using the drawing system 1 of the present embodiment, the user first selects execution of nail print processing from the operation unit 71 of the terminal device 7 . This activates the nail print AP 821b (step S1). When the nail print AP 821b is activated, the display control section 812 reads the nail design from the design storage section 822 and causes the display section 72 to display a design selection screen asking the user to select a nail design (step S2). When the user selects one of the nail designs displayed on the design selection screen by performing an input operation such as a touch operation, the desired nail design is selected as the design to be drawn on the nail T (step S3).

On the other hand, when the power of the nail printing device 2 is turned on (step S4), the display control unit 312 of the nail printing device 2 displays an instruction screen prompting the user to set the printing finger U1 at a predetermined position on the fixing jig 6. It is displayed on the unit 23 (step S5).
The display prompting the user to set the printing finger U1 on the fixing jig 6 may be displayed on the display section 72 of the terminal device 7 or may be displayed on both display sections 23 and 72 .

The user sets the printing finger U1 on the fixing jig 6 according to the instruction. A message stating "Please photograph the finger and the first reference mark from the tip side of the nail" is displayed on the display unit 72 of the terminal device 7 or the display unit 23 of the nail printing device 2 (step S6), and is fixed. The printing finger U1 fixed to the jig 6 and the first reference mark F1 are photographed from the tip side of the nail T by the photographing unit 73 of the terminal device 7, whereby the printing finger U1 fixed to the fixing jig 6 and the first reference mark F1 A first image with the first reference mark F1 is acquired by the terminal device 7 (step S7).
Further, a message stating "Please photograph the finger and the second reference mark from the surface side of the nail" is displayed on the display unit 72 of the terminal device 7 or the display unit 23 of the nail printing device 2 (step S8). , the printing finger U1 fixed to the fixing jig 6 and the second reference mark F2 are photographed from the surface (upper surface) side of the nail T by the photographing unit 73 of the terminal device 7. A second image of the printed finger U1 and the second reference mark F2 is acquired by the terminal device 7 (step S9).
In steps S6 and S8, the display unit for displaying the message may be either the display unit 72 of the terminal device 7 or the display unit 23 of the nail printing device 2. good.

The display unit 23 of the nail printing device 2 displays an instruction prompting the user to set the fixing jig 6 in the jig placement unit 50 while the printing finger U1 is fixed after the photographing is completed (step S10). sets the fixing jig 6 at a predetermined position of the jig placement section 50 according to the instruction. The instruction to set the fixing jig 6 to the jig placement unit 50 may be displayed on the display unit 72 of the terminal device 7 or may be displayed on both the display units 23 and 72. .
In this embodiment, as shown in FIG. Push it in the direction of the black arrow until the insertion side end of the fixing jig 6 abuts against the deepest part of the . Thereby, as shown in FIG. 6, the fixing jig 6 is set at a predetermined position of the jig placing portion 50. Next, as shown in FIG.

On the other hand, the detection processing unit 814 of the terminal device 7 detects the second reference mark F2 by performing image processing on the second image acquired by the imaging unit 73 (step S12). If the detected second reference mark F2 has distortion or the like, trapezoidal correction is performed so that the contour of the nail T in the second reference mark F2 is oriented in a direction suitable for printing. , a rectangular second reference mark F2 without distortion or inclination is detected (step S13).
Furthermore, the detection processing unit 814 detects the contours of the printing finger U1 and the nail T by performing image processing on the second image acquired by the imaging unit 73 (step S14).
Next, the detection processing unit 814 detects the first reference mark F1 by performing image processing on the first image acquired by the imaging unit 73 (step S15).
Then, the detection processing unit 814 detects the nail height Z of the nail T by performing image processing on the first image acquired by the imaging unit 73 (step S16).

When the detection processing unit 814 detects the contours of the printing finger U1 and the nail T and detects the height information of the nail in the nail width direction, the drawing data generation unit 815 generates Initial image data (RGB data) before being converted into drawing data is generated (step S17). Further, the drawing data generation unit 815 appropriately performs curved surface correction on the image data of the nail design according to the detected nail height (step S18). Then, the drawing data generation unit 815 generates drawing data based on the detection result of the detection processing unit 814 (step S19).

Specifically, the drawing data generation unit 815 first selects data to be drawn on the nail based on the outline of the nail T detected by the detection processing unit 814 (the size of the nail region (drawing region)). Initial drawing data is created by trimming or resizing the nail design image.
Next, the drawing data generation unit 815 performs density adjustment corresponding to the curved shape on the initial drawing data according to the pixel arrangement. For example, in the inclined region Ar1 (regions with widths w1R and w1L from both left and right ends of the nail region), the density data is converted to high density data so that more ink is ejected than in a flat portion (for example, flat region Ar3). The curved surface of the image data is corrected so as to increase the amount of CMY or CMYB ink ejected from the drawing head 41 of the ink jet system. The amount of ink to be increased is determined by the ratio of the Z value of the flat area Ar3 and the Z value of the inclined area Ar1. When the ratio between the Z value of the flat area Ar3 and the Z value of the sloping area Ar1 is small, the ink density to be drawn is slightly increased (for example, the sloping area Ar1 is flat The density is adjusted such that the density is set to twice that of the area Ar3).
For other areas, normal density adjustment is performed, and the amount of CMY or CMYB ink ejected from the drawing head 41 is set to the normal amount.
As a method of adjusting the density, there are a method of adjusting the "dot density" by increasing or decreasing the amount of ink applied, and a method of increasing or decreasing the density of the ink dots. good.
In addition, although the drawing area is divided into three areas Ar1 to Ar3 in this embodiment, it may be divided into more tilt levels. In this case, it is also possible to finely adjust the density according to the curved shape of the nail T, such as adjusting the density between 4 times and 1 time according to the tilt angle according to the curved shape of the nail T. It becomes possible.

The drawing data generation unit 815 determines whether or not density correction is necessary for all pixels and, if necessary, the degree of correction, and appropriately performs necessary correction on the entire image data. This completes the drawing data generation work.
When the drawing data generation work is performed in the state of CMY values or CMYB values as drawing data to be transmitted to the nail printing device 2, density adjustment in curved surface correction or the like is performed by adjusting the density of ink dots. and dot density can be adjusted.
Note that density adjustment in curved surface correction and the like is not limited to the case where it is performed in the state of CMY values or CMYB values, and initial drawing data before being converted into drawing data to be transmitted to the nail printing device 2 originally has. This may be done by increasing or decreasing each RGB value in the state of RGB values.

The drawing data generated by the drawing data generation unit 815 is transmitted from the terminal device 7 to the nail printing device 2 via the communication units 24 and 74 (step S20).
When the nail printing device 2 receives the drawing data (step S21), the drawing control section 313 corrects the offset value of the drawing data (step S22). Then, the corrected drawing data is output to the drawing unit 40 to start the drawing process (step S23). When the drawing of the nail design for the nail T ends (step S24), the drawing process in this embodiment ends.
When the drawing process is finished, the display section 23 or the like may display a message to that effect.
When the drawing process is finished, the user pulls out the fixing jig 6 from the inside of the apparatus, removes the printing finger U1 from the fixing jig 6, and performs post-processing such as drying the drawn portion and applying an overcoat agent.

Although not specifically described above, when drawing on the nail T with the drawing system 1 of the present embodiment, the user first applies a white or other undercoat agent to the nail region and then dries it in advance. It is preferable to fix the printing finger U1 and its nail T to the fixing jig 6 after the processing.

When performing nail printing using the drawing system 1, at least when using the drawing system 1 for the first time, the fingers (for example, 10 fingers from the left and right thumbs to the little fingers) on which drawing is planned should be attached to a fixing jig. 6, and the captured image is associated with information for identifying the user and information indicating each finger type (that is, the type of thumb, little finger, etc.), etc., and the storage unit of the terminal device 7. 82 or the like may be stored and registered. In this case, once registered information is saved until it is reset or updated, and the already registered information may be referenced as a default in the second and subsequent drawing processes.
In this way, by registering in advance the image of the nail T to which the supplementary information of the user and finger type is added, the shape (size, horizontal/vertical) of the nail T can be displayed on the design selection screen for selecting the nail design. It is also possible to preferentially display only designs that match the characteristics of the nail T, etc., or designs that match the shape of the nail T, etc., as candidates.
Further, when the image of the nail T associated with the finger type is stored, for example, when drawing is performed in order from the thumb, and when it is set to draw a different design for each finger, the above step The image of the nail T acquired in S6 is matched with the image of the nail T stored in association with the finger type in advance. , a message such as "A finger different from the finger to be drawn is set" may be displayed to alert the user.

As described above, according to the present embodiment, the printing finger U1 and the nail T are fixed to the fixing jig 6 which is detachably attached to the nail printing device 2, and fixed outside the nail printing device 2. The jig 6 is photographed from the toe side, an image including the first reference mark F1 and the nail T is acquired, and the position of the first reference mark F1 and the position of the nail T are detected from the acquired image. . Then, the curved shape in the nail width direction of the nail T to be drawn by the drawing unit 40 is detected from the detection result, and the drawing data is generated after appropriately performing the curved surface correction according to the curved shape.
Therefore, appropriate curved surface correction can be performed for various nails having various curved shapes, and high-definition drawing can be performed up to the end of the nail T without distortion, blurring, or the like. .
In this embodiment, an image of the nail T or the like is acquired by an imaging unit of a terminal device different from the nail printing device 2, and the curved shape of the nail T is detected based on the acquired image. Therefore, it is not necessary to equip the nail printing device 2 with a configuration for acquiring an image, such as a camera or a lighting device. As a result, the time and effort required for aligning the camera can be eliminated, the cost of the device itself can be kept low, and wiring within the device is not complicated, so that the configuration can be realized with a simple configuration.
Further, in this embodiment, the first reference mark F1 is a rectangular mark extending in the claw width direction. Therefore, when analyzing the image, the position and the like can be recognized more accurately than when the first reference mark F1 is composed of lines.

In addition, since image recognition of images taken by the camera and generation of drawing data based on recognition results are also performed on the terminal device 7 side, various resources (for example, circuit scale, Memory, storage for storing reference files, etc.) can be inexpensive and small, and in this respect also cost reduction and simplification of the device configuration can be realized.
Further, unlike the case where the nail print device 2 takes an image, sends the image to an external device, and entrusts image processing and the like to the external device, exchange of image data, etc., between the nail print device 2 and the external device is eliminated. Since the time required for data communication can be reduced, the processing speed can be increased, and rapid drawing processing can be performed.

In addition, particularly in the case of a drawing object having a curved surface such as a nail T, high-definition drawing cannot be performed unless the curved shape is accurately detected and correction is performed accordingly. Even if a photographing means is provided in the apparatus 2, it is difficult to accurately grasp the three-dimensional shape such as curvature only with an image of the nail T photographed from the information. For this reason, it is necessary to take pictures a plurality of times at different angles or to take pictures of changes in shadows while changing the way of illumination. It is difficult to provide illumination means, and inevitably complicates the configuration and increases the cost of the apparatus. In addition, when photographing a nail inside the apparatus from the outside, it becomes necessary to provide a window or the like on the outer wall of the apparatus for photographing the inside of the apparatus, which requires time and effort in the production of the apparatus, and also restricts the design. .

In this respect, in this embodiment, since the nail T is photographed outside the apparatus, the nail T can be photographed freely from any angle, and the shape (curved shape) of the nail T in the height direction can be most easily detected. Photographing from the toe side can also be easily realized, and the degree of freedom in device design of the nail printing device 2 is also improved.
In this way, even if the external terminal device 7 performs from photographing to generation of drawing data, the fixing jig 6 for fixing the printing finger U1 and the nail T is provided with the second reference mark F2, and printing is performed. By photographing the finger U1 and the nail T together with the second reference mark F2, the position coordinates of the nail T can be accurately grasped in relation to the nail printing device 2, and the fixing jig 6 can be attached to the nail printing device 2. When setting and drawing, the drawing area (nail area) can be set accurately, and precise drawing processing can be performed on the nail area.
In addition, since the image is taken outside the apparatus, the image can be taken at a place where the user's hands are free, and the burden on the user can be reduced.
Furthermore, ink mist ejected from the drawing head 41 may scatter in the nail printing device 2 during drawing, etc. If there is a camera in the device, the ink mist may adhere to the lens and each mechanism. may become dirty. In this regard, in this embodiment, since the image is captured outside the apparatus, there is no possibility that the image capturing unit 73 is stained with ink mist.

Further, in the present embodiment, the nail printing apparatus 2 includes a jig placement section 50 in which the fixing jig 6 is arranged so that the nail T is positioned at a predetermined position on the XY plane perpendicular to the height direction of the nail T. I have it. Therefore, even if the fixing jig 6 to which the printing finger is fixed is taken out of the apparatus and photographing is performed, the fixing jig 6 can be placed at the correct position in the apparatus when drawing is performed. does not cause problems.

Further, in this embodiment, the jig placement portion 50 is provided with a flange portion 65 as a guide portion for guiding the fixing jig 6 to a predetermined position.
As a result, when the fixing jig 6 is set in the nail printing device 2, it can always be arranged in an accurate position, and after photographing outside the device, the position of the fixing jig 6 inside the device can be adjusted. Accurate setting can be performed without reconfirming.

Although the embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and it goes without saying that various modifications are possible without departing from the scope of the invention.

For example, in the present embodiment, the fixing jig 6 to which the printing finger U1 is fixed is photographed from the tip side of the nail T to obtain a first image including the first reference mark F1 and the nail T, and the printing finger U1. A case will be described as an example in which a second image including the second reference mark F2 and the claw T is acquired by the photographing unit 73 by photographing the fixing jig 6 in a state where U1 is fixed from the upper surface side of the claw T. However, acquiring a second image for identifying the nail region is not essential in the present invention.
Only the first image for detecting the three-dimensional shape (curved shape) of the nail T in the height direction, which is difficult to detect by simply photographing the nail T from above the nail T, is captured by the image capturing unit 73 of the terminal device 7 outside the device. Acquisition and identification of the nail region may be performed, for example, by photographing with a camera in the device, or by providing a sensor or the like in the portion where the finger is placed and grasping the arrangement position of the nail T or the like. .

Further, in the present embodiment, the case where the design storage unit 822 for storing the image data of the nail design is provided in the storage unit 82 of the terminal device 7 is illustrated, but the image data of the nail design is stored in the storage unit of the terminal device 7 is not limited to being stored in
For example, nail design image data may be stored in a server device or the like that can be connected via a network line or the like, and the server device or the like may be accessed to refer to the nail design image data.
By doing so, it is possible to select a design to be drawn from among a greater number of nail designs.

Further, in the present embodiment, the drawing head 41 of the nail printing device (drawing device) 1 is configured to include the ink-jet drawing head 41, but the configuration of the drawing head 41 is not limited to this.
For example, a pen holder for holding a drawing pen that draws with the tip of the pen attached to the surface of the nail T may be provided, and drawing may be performed using the pen. Further, a configuration may be adopted in which both an ink-jet drawing head and a pen holder for holding a pen for drawing are provided as in the present embodiment, and drawing is performed using a plurality of drawing means.

Further, the nail printing device 2 may be provided with a drying section including a heater and a fan for drying the ink after drawing.

Further, in the present embodiment, the nail printing device 2 is provided with the display unit 23, but various images and instructions/messages to the user are all displayed on the display unit 72 on the terminal device 7 side. In such a case, the nail printing device 2 may be configured without the display section 23 .
In this case, the nail printing device 2 can be made cheaper and simpler.

In the present embodiment, the nail T of the printing finger U1 is fixed to the fixing jig 6 to perform imaging and drawing processing. Not limited.
For example, even a nail-like shape, such as a nail chip that is attached to the nail T, can be used as a "nail" that can be drawn in the drawing system.

Although several embodiments of the present invention have been described above, the scope of the present invention is not limited to the above-described embodiments, and includes the scope of the invention described in the claims and equivalent ranges thereof. .
The invention described in the scope of claims originally attached to the application form of this application is additionally described below. The claim numbers in the appendix are as in the claims originally attached to the filing of this application.
[Appendix]
<Claim 1>
a drawing unit that draws on the nail;
A print finger, which is a finger having a nail to be drawn by the drawing unit, is detachable from the main body of the apparatus, and can be fixed so that the nail is exposed from the tiptoe side. a fixing jig provided with a first reference mark serving as a reference in the height direction of the claw;
a drawing device comprising
the photography department,
The first reference mark is obtained from the first image including the nail and the first reference mark obtained by photographing the printing finger fixed to the fixing jig from the tip end side of the nail by the photographing unit. a detection processing unit that detects the position of and the upper surface position of the claw, and detects the curved shape of the claw in the claw width direction based on the detection result;
a drawing data generation unit that generates drawing data subjected to curved surface correction according to the curved shape of the nail in the nail width direction based on the detection result of the detection processing unit;
a terminal device comprising
A drawing system with
<Claim 2>
2. The drawing system according to claim 1, wherein the first reference mark is a rectangular or linear mark extending in the nail width direction.
<Claim 3>
The fixing jig is provided with a second reference mark serving as a reference for setting the drawing area by the drawing unit,
The detection processing unit detects the printing finger fixed to the fixing jig from the second image including the nail and the second reference mark, which is captured from the upper surface side of the nail by the photographing unit. detecting the position of a second fiducial mark and the area of the nail;
3. The drawing system according to claim 1, wherein the drawing data generation unit sets a drawing area by the drawing unit based on the detection result of the detection processing unit, and generates drawing data corresponding thereto.
<Claim 4>
4. The drawing according to any one of claims 1 to 3, wherein the photographing unit in the terminal device photographs the fixing jig to which the printing finger is fixed outside the main body of the drawing device. system.
<Claim 5>
The drawing device is characterized by comprising a jig arranging section in which the fixing jig is arranged so that the nail is positioned at a predetermined position on an XY plane perpendicular to the height direction of the nail. The drawing system according to any one of claims 1 to 4.
<Claim 6>
6. The drawing system according to claim 1, wherein the jig placement section is provided with a guide section for guiding the fixing jig to the predetermined position.
<Claim 7>
A drawing device,
a drawing unit that draws on the nail;
A print finger, which is a finger having a nail to be drawn by the drawing unit, is detachable from the main body of the apparatus, and can be fixed so that the nail is exposed from the tiptoe side. a fixing jig provided with a first reference mark serving as a reference in the height direction of the claw;
with
A curved shape of the nail in the nail width direction from the position of the first reference mark and the upper surface position of the nail acquired by photographing the fixing jig to which the printing finger is fixed outside the apparatus main body is detected, and based on the detection result, the drawing device is capable of communicating with a terminal device that generates drawing data that has undergone curved surface correction according to the curved shape of the nail in the nail width direction.
<Claim 8>
A drawing unit for drawing on a nail, and a print finger, which is a finger having a nail to be drawn by the drawing unit, which is detachably attached to the main body of the apparatus, can be fixed so that the nail is exposed from the tip of the nail. and a fixing jig having a first reference mark, which serves as a reference in the height direction of the nail on the outer end surface of the nail tip side, and is capable of communicating with a drawing device,
the photography department,
From the first image including the first reference mark and the nail obtained by photographing the printing finger fixed to the fixing jig from the tip end side of the nail by the photographing unit, the first reference mark is obtained. a detection processing unit that detects the position and the upper surface position of the claw, and detects the curved shape of the claw in the claw width direction based on the detection result;
a drawing data generation unit that generates drawing data subjected to curved surface correction according to the curved shape of the nail in the nail width direction based on the detection result of the detection processing unit;
terminal device.

1 drawing system 2 nail printing device 6 fixing jig 7 terminal device 40 drawing unit 41 drawing head 50 jig placement unit 51 upper surface plate 53 finger placing table 73 imaging unit 81 control unit 511 notch 512 flange 814 detection processing unit 815 Drawing data generator T Nail U1 Printing finger

Claims (7)

a device main body having a drawing unit for drawing on a nail;
a fixing jig that is detachable from the main body of the device and that fixes a finger having a nail to be drawn in a predetermined state;
a jig arranging portion provided in the apparatus main body for fixing the fixing jig inserted from the outside to a predetermined position;
with
After photographing the finger fixed to the fixing jig from the distal end side by an external device in a state in which the fixing jig is not inserted into the device main body, the fixing jig to which the finger is fixed is inserted. When it is fixed to the jig placement part by
controlling drawing on the fingernail by the drawing unit according to the curved shape of the fingernail in the nail width direction specified based on the image obtained by the photographing;
drawing system. recognizing a predetermined portion on the surface of the fixing jig and the position of the upper surface of the fingernail based on the image obtained by the photographing;
When specifying the curved shape of the fingernail in the nail width direction based on the recognition result, the fixing jig, which is grasped in advance on the apparatus main body side, is fixed to the jig placement portion. performing correction corresponding to deviation of the direction or inclination of the photographing by the external device based on the positional relationship between the predetermined part and the apparatus main body;
2. The rendering system of claim 1. The external device identifies a curved shape of the fingernail in the nail width direction based on the image obtained by the photographing, and generates drawing data subjected to curved surface correction according to the identified curved shape. ,
transmitting the generated drawing data from the external device to the device main body;
3. The rendering system according to claim 1 or 2. The fixing jig is configured such that the fixed fingernail is exposed, and a first reference mark serving as a reference in the height direction of the nail is provided at a predetermined portion on the surface of the fixing jig. ,
The external device detects the position of the first reference mark and the upper surface position of the nail based on an image obtained by photographing the fingernail fixed to the fixing jig from the tip side, detecting the curved shape of the claw in the claw width direction based on the detection result;
4. The drawing system according to claim 3 . Adjusting the density of drawing for each region of the fingernail by the drawing unit according to the curved shape of the fingernail in the nail width direction;
The drawing system according to any one of claims 1 to 4. Depending on the curved shape of the fingernail in the nail width direction, the amount of ink applied or the ink density is increased in the inclined area of the nail surface than in the flat area of the nail surface,
6. The drawing system according to claim 5 . An apparatus main body having a fixing jig for fixing a finger to be drawn, a drawing section for drawing on a nail, and a jig placement section for fixing the fixing jig at a predetermined position, and an external device having an imaging section. A drawing control method for controlling drawing on the finger nail to be drawn by
photographing the finger fixed to the fixing jig from the tip side by the external device in a state in which the fixing jig is not inserted into the device main body;
A nail of the fingernail specified based on the image obtained by the photographing when the fixing jig to which the finger is fixed is inserted into the device main body and fixed to the jig placement section. controlling drawing on the fingernail by the drawing unit according to the curved shape in the width direction;
Drawing control method.

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