JP5728885B2 - Nail printing apparatus and printing control method - Google Patents

Description

  The present invention relates to a nail printing apparatus and a printing control method.

  Conventionally, a nail printing apparatus that prints on a fingernail has been proposed (see, for example, Patent Document 1). The nail printing apparatus, for example, positions a finger of a nail to be printed on a finger placing table provided in the apparatus main body, and uses an ink jet print head or the like on the finger nail thus positioned to print an image such as a color or a pattern. However, in such a nail printing device, if the finger moves during printing and the position is shifted or the finger is removed from the finger placement table, the pattern or the like cannot be correctly printed on the nail, A printing error occurs.

When the recording medium to be printed is paper or the like, if a printing error occurs due to misalignment or the like, the paper or the like may be discarded and reprinted.
However, when the object to be printed is a nail, if there is a misalignment in the middle of printing, it is necessary to remove the ink that has adhered to the nail and then perform reprinting. There is a problem that it is troublesome.

Therefore, in such an apparatus, it is conceivable to perform printing in a state where a finger fixing jig is provided and the finger is fixed by a finger fixing jig or the like so that the finger does not move during printing.
If the finger is fixed in this way, the position of the finger is not shifted during printing or the finger is not separated from the finger placement table, and printing can be performed correctly at an appropriate position.

Special table 2003-534083 gazette

However, if printing is performed with a finger fixed by a finger fixing jig or the like, the finger is pressed during printing, which is extremely uncomfortable for the user.
In addition, when a user wears a decorative item such as a ring on a finger to be printed, there is a problem that it may be difficult to firmly fix the finger with a finger fixing jig or the like.

  The present invention has been made in view of the circumstances as described above, and when a finger moves during printing and the position of the finger is shifted or the finger is separated from the finger placement table, the position is mistakenly set to an inappropriate position. An object of the present invention is to provide a nail printing apparatus and a printing control method that can prevent a situation in which printing is performed.

In order to solve the problem, the nail printing apparatus according to claim 1,
Finger placement means on which a finger is placed;
Photographing means for photographing a finger placed on the finger placing means to obtain a fingernail image;
A first storage unit that stores the coordinate value of the contour line of the fingernail image acquired by the photographing unit and the coordinate value of the nail region included in the fingernail image in association with each other;
Printing means for printing on the nail region;
After storing the coordinate value of the contour line of the fingernail image and the coordinate value of the nail region included in the fingernail image in the first storage unit in association with each other, the coordinate value is placed on the finger placement unit. Finger position detecting means for detecting the contour line of the placed finger from the non-printing side of the finger;
A second storage unit for storing the coordinate value of the contour line of the finger detected by the finger position detection unit;
Control means for controlling printing on the nail region by the printing means,
The control means includes
The coordinate value of the contour line of the fingernail image stored in the first storage unit and the coordinate value of the contour line of the finger stored in the second storage unit are compared, and both are predetermined values. Including a printability determination unit that determines whether or not the deviation has occurred;
The control unit stops printing on the nail region by the printing unit when the printing propriety determining unit determines that both are shifted by a predetermined value or more.

Further, the invention according to claim 2 is the nail print apparatus according to claim 1,
The print availability determination unit includes:
When the coordinate value of the contour line of the fingernail image stored in the first storage unit and the coordinate value of the contour line of the finger stored in the second storage unit are shifted by a predetermined value or more, The coordinate value of the nail region corresponding to the coordinate value of the finger outline stored in the second storage unit is estimated, and the nail region to be printed is determined from the estimated coordinate value of the nail region by the printing unit. To determine whether it is within the printable range of
The control means is characterized in that when the printability determination means determines that the nail area to be printed is not within the printable range of the printing means, printing by the printing means is stopped.

Further, the invention according to claim 3 is the nail print apparatus according to claim 1 or 2,
The control means includes
This is a case where the coordinate value of the contour line of the fingernail image stored in the first storage unit and the coordinate value of the contour line of the finger stored in the second storage unit are shifted by a predetermined value or more. When the nail area to be printed is determined to be within the printable range of the printing means by the printing availability determining means, based on the coordinate value of the nail area estimated by the printing availability determining means, Including data correction means for correcting printing data based on the coordinate values of the nail region ;
The control means controls the printing means to perform printing based on the printing data corrected by the data correction means.

According to a fourth aspect of the present invention, in the nail print apparatus according to the second aspect,
When the printability determination unit determines that the nail region to be printed is not within the printable range of the printing unit, the printing unit is provided with a notification unit that notifies the fact.

The printing control method according to claim 5 is:
A photographing step of photographing a finger placed on the finger placing means to obtain a fingernail image;
A first storage step for storing the coordinate value of the contour line of the fingernail image acquired in the photographing step in association with the coordinate value of the nail region included in the fingernail image;
A printing step of printing on the nail region by a printing means;
After storing the coordinate value of the contour line of the fingernail image and the coordinate value of the nail region included in the fingernail image in the first storage unit in association with each other, the coordinate value is placed on the finger placement unit. A finger position detecting step for detecting the contour line of the placed finger from the non-printing side of the finger;
A second storage step of storing the coordinate value of the contour line of the finger detected in the finger position detection step;
The coordinate value of the contour line of the fingernail image stored in the first storage step is compared with the coordinate value of the contour line of the finger stored in the second storage step. A printability determination step that determines that printing cannot be started or continued if
A printing control step of stopping printing on the nail region by the printing means when it is determined that printing cannot be started / continued in the printing propriety determination step;
It is characterized by including.

According to a sixth aspect of the present invention, in the printing control method according to the fifth aspect,
The printing propriety determination step includes
When the coordinate value of the contour line of the fingernail image stored in the first storage step and the coordinate value of the finger contour line stored in the second storage step deviate by a predetermined value or more, the first The coordinate value of the nail region corresponding to the coordinate value of the contour line of the finger stored in step 2 is estimated, and the nail region to be printed can be printed by the printing unit from the estimated coordinate value of the nail region. Determining whether it is within range,
The printing control step is characterized in that when the nail area to be printed is determined not to be within the printable range of the printing means in the printing availability determination step, printing by the printing means is stopped.

The invention according to claim 7 is the printing control method according to claim 5 or 6,
The printing control step includes
The coordinate value of the contour line of the fingernail image stored in the first storage step and the coordinate value of the contour line of the finger stored in the second storage step are shifted by a predetermined value or more, When it is determined in the printability determination step that the nail region to be printed is within the printable range of the printing unit, based on the coordinate value of the nail region estimated in the printability determination step, Including a data correction step of correcting data for printing based on the coordinate value of the nail region ,
In the printing control step, the printing unit is controlled to perform printing based on the printing data corrected in the data correction step.

In addition, the nail print device according to claim 8,
Finger placement means on which a finger is placed;
Photographing means for photographing a finger placed on the finger placing means to obtain a fingernail image;
First storage control means for storing the coordinate value of the contour line of the fingernail image acquired by the photographing means and the coordinate value of the nail region included in the fingernail image in association with each other;
After the coordinate values of the contour line of the fingernail image and the coordinate values of the nail region are stored in association with each other by the control of the first storage control unit, the finger placed on the finger placement unit is stored. Finger position detecting means for detecting the position of
Second storage control means for storing coordinate values of the contour line of the finger detected by the finger position detection means;
The coordinate value of the second storage control means contour of the fingernail image being more stored in the control of the first storage control means and the coordinate values of the contour line of the finger stored by the control of the In comparison, a printability determination unit that determines whether or not both have deviated by a predetermined value or more;
If it is determined by the printability determination unit that both have deviated by a predetermined value or more, printing on the fingernail area placed on the finger placing unit is stopped, and both have not deviated by a predetermined value or more. And a print control means for controlling to perform printing on the fingernail area placed on the finger placement means.

The print control method according to claim 9 is:
In a printing control method used in a nail printing apparatus including a finger placing unit on which a finger is placed and a photographing unit that takes a finger placed on the finger placing unit and obtains a fingernail image ,
A first storage control step of storing the coordinate value of the contour line of the fingernail image acquired by the photographing unit and the coordinate value of the nail region included in the fingernail image in association with each other;
The finger placed on the finger placement means after the coordinate value of the contour line of the fingernail image and the coordinate value of the nail region are stored in association with each other by the control of the first storage control step. A finger position detecting step for detecting the position of
A second storage control step of storing the coordinate value of the contour line of the finger detected by the finger position detection step;
The coordinate values of the contour line of the second storage control step the fingernail image being more stored in the control of the coordinate values of the contour line of the finger stored the first storage control step by the control of the In comparison, a printability determination step for determining whether or not both have deviated by a predetermined value or more;
If it is determined in this printability determination step that both have deviated by a predetermined value or more, printing on the fingernail area placed on the finger placing means is stopped, and both have not deviated by a predetermined value or more. A print control step of controlling to perform printing on the fingernail area placed on the finger placement means.

According to the first and fifth aspects of the present invention, the coordinate value of the contour line of the fingernail image acquired by the photographing unit is compared with the coordinate value of the contour line of the finger sent from the finger position detecting unit. Then, when both are shifted by a predetermined value or more, printing on the nail region by the printing unit is stopped. For this reason, when the finger position is shifted to such an extent as to affect printing, it is possible to prevent erroneous printing at an inappropriate position.
According to the second and sixth aspects of the present invention, when the coordinate value of the contour line of the fingernail image and the coordinate value of the finger contour line deviate by a predetermined value or more, the printability determination unit The coordinate value of the nail region corresponding to the coordinate value of the contour line of the image is estimated, it is determined whether or not the estimated nail region is within the printable range of the printing means, and the nail region is determined to be out of the printable range When it is done, printing by the printing means is stopped. For this reason, it is possible to prevent the nail area from being erroneously printed at an inappropriate position while being outside the printable range of the printing means.
According to the third and seventh aspects of the present invention, when the nail region is within the printable range of the printing unit, the data correction unit prints so as to correspond to the coordinate value of the contour line of the finger. Correct the data. For this reason, when it can respond by correction | amendment, it can respond by correction | amendment as much as possible, and there exists an effect that it can avoid the burden and time burden by re-printing etc. to a user as much as possible.
In addition, since the finger position detection means can detect the contour line of the finger from the non-printing side of the finger, it can detect the position of the finger (coordinate value of the contour line of the finger) at any time after printing is started. Thus, even when the finger position is shifted after the start of printing, it is possible to appropriately take measures such as stopping / stopping printing and correcting printing data.
According to the invention described in claims 8 and 9, the coordinate value of the contour line of the fingernail image acquired by the photographing unit and the coordinate value of the contour line of the finger position detected by the finger position detection unit are obtained. In comparison, when both are deviated by a predetermined value or more, it can be controlled to stop printing on the nail area of the placed finger, while it is determined that both have not deviated by a predetermined value or more. In such a case, there is an effect that it can be controlled to perform printing on the nail area of the placed finger.

1 is a perspective view conceptually showing an embodiment of a nail print apparatus according to the present invention, and shows a state in which a lid is opened. It is the perspective view which showed notionally the apparatus main body of the nail print apparatus of FIG. FIG. 2 is a cross-sectional view illustrating a printing finger fixing unit of the nail printing apparatus in FIG. 1 and illustrates a fixing mode when a pinky finger is inserted from a forefinger as a printing finger into a printing finger insertion unit. It is principal part sectional drawing which expanded the finger position detection means part shown in FIG. 3, and showed the structure typically. It is sectional drawing of the front side of the nail print apparatus of FIG. It is a sectional side view of the nail print apparatus of FIG. It is a principal part block diagram which showed the control structure of the nail print apparatus which concerns on this embodiment. 6 is a flowchart illustrating the first half of a print control process in the present embodiment. 6 is a flowchart illustrating the second half of the print control process in the present embodiment. (A) is a figure which showed an example of the outline of the printing finger detected by the finger position detection means, (b) is a figure which shows an example of the fingernail image obtained by the imaging | photography part. (A) is the figure which showed an example of the outline of the printing finger detected by the finger position detection means, (b) is a figure which shows an example of the nail area | region corresponding to (a). (A) is the figure which showed an example of the outline of the printing finger detected by the finger position detection means, (b) is a figure which shows an example of the nail area | region corresponding to (a).

An embodiment of a nail print apparatus according to the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view illustrating an appearance of a nail print apparatus according to the present embodiment, and FIG. 2 is a perspective view illustrating an internal configuration of the nail print apparatus.

  As shown in FIG. 1, the nail printing apparatus 1 includes a case body 2 and a lid body 4. The case body 2 and the lid body 4 are connected to each other via a hinge 3 provided at the rear end portion of the upper surface of the case body 2.

The case body 2 is formed in an oval shape in plan view. The case main body 2 is provided with an opening / closing plate 2c on the front side so as to be able to rise and fall. The opening / closing plate 2 c is connected to the case body 2 via a hinge (not shown) provided at the lower front end of the case body 2. The opening / closing plate 2 c is for opening and closing the front surface of the case body 2.
Further, an operation panel 12 described later is installed on the top plate 2f of the case body 2, and a display unit 13 is set almost at the center of the top plate 2f.
Note that the shapes and configurations of the case body 2 and the lid body 4 are not limited to those illustrated here.

Further, the case main body 2 accommodates the apparatus main body 10 of the nail printing apparatus 1. The apparatus main body 10 includes a printing finger fixing unit 20 constituting a printing finger fixing unit shown in FIG. 2, a photographing unit 30 constituting a photographing unit, a printing unit 40 constituting a printing unit, and a control unit. A control device 50 (see FIG. 7) is provided. The printing finger fixing unit 20, the photographing unit 30, the printing unit 40, and the control device 50 are provided in the machine casing 11.
The machine casing 11 includes a lower machine casing 11a and an upper machine casing 11b. The lower machine casing 11a is formed in a box shape and installed below the inside of the case body 2, and the upper machine casing 11b is installed above the lower machine casing 11a and inside the case body 2.

The printing finger fixing unit 20 is provided on the lower machine casing 11 a in the machine casing 11. The printing finger fixing unit 20 is configured by the printing finger insertion unit 20a, the non-printing finger insertion unit 20b, and the gripping unit 20c provided in the lower machine casing 11a.
Here, the printing finger insertion portion 20a is a finger insertion portion for inserting a finger (hereinafter referred to as “printing finger”) U1 corresponding to the nail T to be printed (see FIG. 3). The bottom surface (printing finger placement surface) of the printing finger insertion unit 20a functions as a finger placement unit that places the printing finger U1. Photographing and printing of the printing finger U1 are performed in a state where the printing finger U1 is placed on the printing finger placement surface of the printing finger insertion unit 20a as the finger placement means.
Further, the non-printing finger insertion unit 20b is a finger insertion unit for inserting a finger other than the printing finger (hereinafter referred to as “non-printing finger”) U2 (see FIG. 3).
The gripping portion 20c is a portion that can be sandwiched between the printing finger U1 inserted into the printing finger insertion portion 20a and the non-printing finger U2 inserted into the non-printing finger insertion portion 20b. In the present embodiment, the grip portion 20c is constituted by a partition wall 21 that partitions the printing finger insertion portion 20a and the non-printing finger insertion portion 20b.

  The upper surface of the partition wall 21 constitutes a flat printing finger placement surface. A bulging portion 22 is formed at the finger insertion side end of the partition wall 21. The bulging portion 22 is a portion where the base U3 of the printing finger U1 and the non-printing finger U2 contacts when the printing finger U1 and the non-printing finger U2 are inserted deeply into the printing finger insertion portion 20a and the non-printing finger insertion portion 20b. Is formed. The bulging portion 22 can strongly hold the partition wall 21 (the gripping portion 20c) between the printing finger U1 and the non-printing finger U2 in a state where the entire belly of the printing finger U1 is in contact with the printing finger placement surface. In addition, the cross-section in the finger insertion direction is circular so as to bulge downward from the lower surface of the partition wall 21. The shape of the bulging portion 22 is not limited to a circular cross section, and may be a non-circular shape such as an elliptical cross section or a polygonal shape.

For example, when four fingers (index finger, middle finger, ring finger, and little finger) other than the thumb of the left hand are the print fingers U1, the user places four print fingers on the print finger insertion portion 20a as shown in FIG. U1 is inserted, and the thumb that is the non-printing finger U2 is inserted into the non-printing finger insertion portion 20b. In this case, when the user holds the gripping portion 20c between the printing finger U1 inserted into the printing finger insertion portion 20a and the non-printing finger U2 inserted into the non-printing finger insertion portion 20b, the printing finger U1 holds the gripping portion. It is fixed on 20c.
When only the thumb becomes the printing finger U1, the thumb (printing finger U1) is inserted into the printing finger insertion unit 20a, and the four fingers other than the thumb (non-printing finger U2) are inserted into the non-printing finger insertion unit. Insert into 20b. Also in this case, the printing finger U1 is fixed by the user holding the grip portion 20c between the printing finger U1 and the non-printing finger U2.

Further, in the present embodiment, the contour line L1 of the printing finger U1 placed on the finger placement means (on the upper surface of the partition wall 21 constituting the printing finger placement surface as the finger placement means ( A finger position detecting means 70 for detecting the printing finger U1 from the non-printing side is provided.
Specifically, the finger position detecting means 70 is a part of the upper surface of the partition wall 21 and extends from the front end portion of the printing finger U1 to the vicinity of the first joint when the printing finger U1 is inserted into the printing finger insertion portion 20a. It is arrange | positioned over the substantially whole region of the part in which is located.
Note that, as in the present embodiment, in the apparatus that performs printing by simultaneously inserting four fingers from the index finger to the little finger into the print finger insertion portion 20a, the entire partial area corresponding to the first joint area from the tip portion of all fingers The finger position detecting means 70 is provided.
Further, the finger position detecting means 70 only needs to be provided at a position where the contour line of the printing finger U1 can be detected from the non-printing side of the printing finger U1, and the position where the finger position detecting means 70 is arranged is a partition wall. The upper surface of 21 is not limited.

As shown in FIG. 4, the finger position detection unit 70 includes a cover member 71 disposed on the upper surface of the partition wall 21 and a plurality of detection units 72 disposed below the cover member 71.
The cover member 71 is a plate-like member formed of a material that transmits light such as glass.
The detection unit 72 is configured by a pair of a light emitting element 73 serving as a light source and a sensor chip 74, for example. For example, an LED or the like is used as the light emitting element 73. The sensor chip 74 includes a light receiving element 741 that receives light emitted from the light emitting element 73 and reflected by the printing finger U1 placed on the cover member 71, and a circuit unit 742 that processes light received by the light receiving element 741. It is composed of In addition, the structure of the detection part 72 is not limited to this, In addition, you may provide optical systems, such as a lens.

  The light receiving element 741 is an image sensor such as a CCD or CMOS sensor, for example, and detects light reflected on the printing finger U1 when the surface of the cover member 71 is covered with the printing finger U1 and shielded from light. The circuit unit 742 includes an image processing circuit 743 that converts light detected by the light receiving element 741 into an electrical signal, and a signal output circuit 744 that outputs the electrical signal converted by the image processing circuit 743 to the control device 50 (see FIG. 7 for both). ) Etc.

When the printing finger U1 covers and covers the surface of the cover member 71, the light from the light emitting element 73 is reflected by the printing finger U1 and enters the light receiving element 741 at the portion covered with the printing finger U1. On the other hand, light passes through the cover member 71 and does not reflect in a portion not covered with the printing finger U1, and therefore light does not enter the light receiving element 741 and light is not detected.
Detection or non-detection of light by the light receiving element 741 is converted into an electrical signal by the image processing circuit 743, and the boundary between the part where the light receiving element 741 detects light and the part where light is not detected (that is, the contour line of the printing finger U1). L1 (see FIG. 10A, etc.) is detected. Information on the detected outline L1 of the printing finger U1 is output to the control device 50 via the signal output circuit 744.
And the control apparatus 50 memorize | stores this outline L1 in RAM (not shown) etc. of the memory | storage part 51 (refer FIG. 7) etc. as a map which represented with the xy coordinate value. The position and direction where the printing finger U1 is placed can be detected from the xy coordinate values of the contour line L1.
The number and arrangement of the detection units 72 are not particularly limited, but are arranged side by side with no gap over the entire surface of the finger position detection unit 70 so that the position and direction of the printing finger U1 can be accurately detected. It is preferable. In addition, it is preferable that the number of the detection units 72 is larger because the outline L1 of the printing finger U1 can be accurately detected.

5 is a cross-sectional view of the front side of the nail print apparatus 1 according to the present embodiment, and FIG. 6 is a side cross-sectional view of the nail print apparatus 1.
As shown in FIGS. 5 and 6, the photographing unit 30 is provided in the upper machine casing 11 b in the machine casing 11.
That is, a camera 32 having about 2 million pixels or more with a built-in driver is installed on the lower surface of the central portion of the substrate 31 installed in the upper machine casing 11b. An illumination lamp 33 such as a white LED is installed on the substrate 31 so as to surround the camera 32. The photographing unit 30 includes the camera 32 and the illumination lamp 33.
The photographing unit 30 illuminates the printing finger U1 placed on the printing finger insertion unit 20a, which is a finger placement unit, with the illumination lamp 33, and photographs the printing finger U1 with the camera 32 to obtain a fingernail image. The photographing unit 30 is an imaging unit, and is connected to a main body control unit 52 of a control device 50 described later, and is controlled by the main body control unit 52.

The printing unit 40 is a printing unit that prints a color, a pattern, or the like on the nail area Ta (see FIG. 10A, etc.) that is a print target area in accordance with printing data based on the coordinate value of the nail area Ta. It is mainly provided in the upper machine casing 11b.
That is, as shown in FIGS. 5 and 6, two guide rods 41 are installed in parallel on both side plates of the upper machine casing 11b. A main carriage 42 is slidably installed on the guide rod 41. As shown in FIG. 6, two guide rods 44 are installed in parallel on the front wall 42a and the rear wall 42b of the main carriage 42. A sub carriage 45 is slidably installed on the guide rod 44. A print head 46 is mounted at the center of the lower surface of the sub carriage 45.
In the present embodiment, the print head 46 is an ink jet type print head that performs printing by atomizing ink and spraying it directly onto a print medium. The recording method of the print head 46 is not limited to the ink jet method.

The main carriage 42 is connected to a motor 43 through power transmission means (not shown), and is configured to move in the left-right direction along the guide rod 41 by forward and reverse rotation of the motor 43. The sub-carriage 45 is connected to a motor 47 via a power transmission means (not shown), and is configured to move in the front-rear direction along the guide rod 44 by forward and reverse rotation of the motor 47.
Further, the lower machine casing 11 a is provided with an ink cartridge 48 for supplying ink to the print head 46. The ink cartridge 48 is connected to the print head 46 via an ink supply pipe (not shown), and supplies ink to the print head 46 as appropriate. Note that an ink cartridge may be mounted on the print head 46 itself.

The printing unit 40 includes the guide rod 41, the main carriage 42, the motor 43, the guide rod 44, the sub carriage 45, the print head 46, the motor 47, the ink cartridge 48, and the like. The motor 43, the print head 46, and the motor 47 of the printing unit 40 are connected to a main body control unit 52 of a control device 50 described later, and are controlled by the main body control unit 52.
The movable range of the print head 46 is a printable range A (see FIG. 10A, etc.) of the nail printing apparatus 1, and printing on the printing finger U1 is performed within this printable range.

The operation panel 12 is input means for the user to make various inputs.
On the operation panel 12, for example, a power switch button for turning on the power of the nail printing apparatus 1, a stop switch button for stopping the operation, and other operation buttons 121 for performing various inputs are arranged.

The display unit 13 is a display unit configured with, for example, a liquid crystal panel (a liquid crystal display (LCD)).
A touch panel may be integrally formed on the surface of the display unit 13. In this case, various inputs can be performed by touching the surface of the display unit 13 by a touch operation using a stylus pen or the like (not shown).

The display unit 13 includes, for example, a fingernail image obtained by photographing the printing finger U1, a nail region Ta therein, a contour line L1 of the printing finger U1, a nail image pattern to be printed on the nail region Ta of the printing finger U1, and a design confirmation. Thumbnail images etc. are displayed.
In the present embodiment, when it is determined that the nail area Ta of the printing finger U1 to be printed is not within the printable range of the printing unit 40, the fact is displayed on the display unit 13. The display unit 13 functions as a notification unit that notifies the user that printing on the nail area Ta cannot be performed. It should be noted that the notified content need not be only that printing is not possible. For example, a specific instruction for the user may be displayed, such as prompting the printing finger U1 to move to the right side or the left side. In addition, when the finger position is shifted and correction is necessary although it is within the printable range A, a message indicating that the data is being corrected may be displayed.

  Moreover, the control apparatus 50 is installed in the board | substrate 31 etc. which are arrange | positioned at the upper machine casing 11b, for example. FIG. 7 is a principal block diagram showing a control configuration in the present embodiment.

  The control device 50 is a computer including a storage unit 51 that includes a CPU (Central Processing Unit) (not shown), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like (all not shown).

The storage unit 51 stores data such as a nail image pattern to be printed, a nail region determination program for determining a nail region, a print propriety determination program for determining whether printing is possible, and correction printing for correcting printing data. Various programs such as a data correction program for printing and a printing program for performing printing processing are stored, and the control device 50 executes these programs to control each unit of the nail printing apparatus 1.
In the present embodiment, the storage unit 51 associates the xy coordinate value of the outline of the fingernail image I1 of the printing finger U1 acquired by the photographing unit 30 with the xy coordinate value of the nail region Ta included in the fingernail image I1. It functions as a first storage unit that stores the information.
Also, it functions as a second storage unit that stores the xy coordinate values of the contour line L1 of the printing finger U1 detected by the finger position detection means 70.

  In the present embodiment, the control device 50 includes functional units such as a main body control unit 52, a printability determination unit 53, and a data correction unit 54.

The main body control unit 52 controls the imaging unit 30 to acquire the fingernail image I1 and extracts the contour line of the fingernail image I1 acquired by the imaging unit 30. Then, the nail area Ta is determined from the fingernail image I1, and the xy coordinate value of the contour line of the fingernail image I1 is associated with the xy coordinate value of the nail area Ta included in the fingernail image I1. It functions as a first storage control means for storing in the RAM or the like of the storage unit 51 as the first storage unit.
Further, the main body control unit 52 stores the information of the contour line L1 of the printing finger U1 detected by the finger position detection unit 70 in the RAM or the like of the storage unit 51 as the second storage unit as xy coordinate values. It functions as a storage control means.

  Further, the main body control unit 52 generates data for printing based on the coordinate value of the area determined as the nail area Ta of the user's printing finger U1, and outputs the data to the printing unit 40 for printing. It functions as a print control means for controlling the printing unit 40 to print the nail area Ta according to the data.

The printability determination unit 53 compares and contrasts the entire contour xy coordinates of the fingernail image I1 and the xy coordinates of the contour L1 of the printing finger U1, and determines whether or not there is a deviation greater than a predetermined value. If there is a deviation greater than or equal to the value, it is a print permission / non-permission determination unit that determines that printing on the nail area Ta cannot be started or continued by the printing unit 40.
The predetermined value when deciding whether to start or continue printing is a threshold value indicating whether or not the deviation affects the printing on the nail area Ta, and may be set in advance by default, The user may be able to make settings afterwards.

  The finger position detection means 70 is configured to detect the contour line L1 of the print finger U1 at the present time and output it to the control device 50 at any time after the start of printing. The printability determination unit 53 is obtained by the photographing unit 30. The overall contour xy coordinates of the fingernail image I1 based on the fingernail image I1 thus compared and the xy coordinates of the latest contour L1 of the printing finger U1 sent from the finger position detecting means 70 are compared and contrasted. Yes. Thereby, even after printing starts, even during printing, it is possible to determine whether or not the printing finger U1 is misaligned and whether it affects printing when there is misalignment.

  When the printability determination unit 53 determines that printing on the nail area Ta cannot be started or continued, the main body control unit 52 as the print control unit stops printing on the nail area Ta by the printing unit 40. The printing unit 40 is controlled.

Further, as a result of comparing and comparing the entire contour line xy coordinates of the fingernail image I1 and the xy coordinates of the contour line L1 of the printing finger U1, the printability determination unit 53 determines that both affect printing (ie, a predetermined value). When it is determined that there is a deviation, the xy coordinate value of the nail area Ta corresponding to the xy coordinate value of the contour line L1 of the printing finger U1 is estimated, and the nail that is the print target is estimated from the estimated coordinate value of the nail area Ta It is determined whether or not the area Ta is within the printable range A of the printing unit 40.
When the printability determination unit 53 determines that the nail area Ta to be printed is not within the printable range A of the printing unit 40, the main body control unit 52 as the print control unit moves to the nail area Ta by the printing unit 40. The printing unit 40 is controlled so as to stop printing, and a message to that effect, an instruction for prompting the user to correct the position of the printing finger U1, and the like are displayed on the display unit 13.

The data correction unit 54 compares and contrasts the entire contour line xy coordinates of the fingernail image I1 and the xy coordinates of the contour line L1 of the printing finger U1, and as a result, both are shifted to the extent that they affect printing (that is, a predetermined value or more). In this case, when the printability determination unit 53 determines that the nail area Ta to be printed is within the printable range of the printing unit 40, the printability determination unit 53 estimates the nail area Ta. Data correction means for correcting printing data based on xy coordinate values.
For example, the xy coordinate of the latest contour line L1 of the printing finger U1 sent from the finger position detection means 70 becomes the entire contour line xy coordinate of the fingernail image I1 based on the fingernail image I1 obtained by the imaging unit 30. On the other hand, when it is tilted 20 degrees clockwise, the amount of deviation from the xy coordinates of the nail area Ta associated with the entire contour xy coordinates of the fingernail image I1 is calculated as a correction value. By correcting the printing data with the correction value, an area inclined 20 degrees clockwise from the original printing data becomes a new printing target area.

When the data correction unit 54 corrects the printing data, the main body control unit 52 as a printing control unit performs printing by the printing unit 40 so as to perform printing on the nail area Ta based on the corrected printing data. To control.
Further, the main body control unit 52 may display on the display unit 13 that data correction is being performed while the printing process is stopped to perform data correction.

Next, a print control method by the nail print apparatus 1 in the present embodiment will be described with reference to FIGS.
When printing is performed by the nail printing apparatus 1, the user first turns on the power switch to activate the control apparatus 50 and selects a nail image pattern (design) to be printed on the printing finger U1. The selected nail image pattern is displayed on the display unit 13 as a thumbnail image for design confirmation. If this design is acceptable, the user confirms the nail image pattern with a confirmation button (not shown).

Next, the user inserts the printing finger U1 into the printing finger insertion unit 20a, inserts the non-printing finger U2 into the non-printing finger insertion unit 20b, fixes the printing finger U1, and then operates the print switch.
For example, when printing is to be performed on the index finger, middle finger, ring finger, and nail area Ta of the little finger of the left hand, the index finger, middle finger, ring finger, and little finger are inserted into the print finger insertion portion 20a in a plane as shown in FIG. Then, the thumb is inserted into the non-printing finger insertion portion 20b. Then, the gripping portion 20c is sandwiched between the index finger, middle finger, ring finger, and little finger inserted into the printing finger insertion portion 20a and the thumb inserted into the non-printing finger insertion portion 20b. As a result, the index finger, middle finger, ring finger, and little finger, which are the printing fingers U1, are fixed.

As illustrated in FIG. 8, when an instruction is input from the print switch of the display unit 13, the control device 50 first controls the photographing unit 30 to photograph the entire printing finger U <b> 1 before starting the printing operation. . Thereby, a fingernail image I1 of the printing finger U1 as shown in FIG. 10B is acquired (step S1). The main body control unit 52 determines a nail area Ta to be a print target area from the fingernail image I1 (step S2). Then, the xy coordinate value of the contour line of the entire printing finger U1 and the xy coordinate value of the nail region Ta are associated with each other and stored in the RAM or the like of the storage unit 51 as the first storage unit (step S3).
Further, the finger position detecting means 70 detects the contour line L1 (see FIG. 10A) of the printing finger U1 at the present time (step S4) and outputs it to the control device 50. The control device 50 stores the xy coordinates of the contour line L1 of the printing finger U1 in the RAM or the like of the storage unit 51 as the second storage unit (step S5).

Next, the printability determination unit 53 determines whether or not the nail area Ta of the printing finger U1 to be printed is within the printable range A of the printing unit 40 (step S6). For example, as shown in FIG. 12A, when the outline L1 of the printing finger U1 protrudes outside the printable range A, the printing finger U1 corresponds to the printing finger U1 as shown in FIG. It is presumed that the nail area Ta to be protruded outside the printable range A.
When the printability determination unit 53 determines that the nail area Ta is not within the printable range A of the printing unit 40 (step S6; NO), when printing is started as it is, the pattern to be printed becomes the nail area. Since it protrudes from Ta, it cannot print appropriately. Therefore, the main body control unit 52 causes the display unit 13 to display a display for instructing the user to correct the finger position without starting printing by the printing unit 40 (step S7). Then, when the printing finger U1 is placed again on the printing finger insertion unit 20a, the processing from step S1 to step S6 is repeated again.

  On the other hand, when it is determined that the nail area Ta is within the printable range A of the printing unit 40 (step S6; YES), the printability determination unit 53 determines the xy coordinate value of the contour line of the fingernail image I1. Is compared with the xy coordinate value of the contour line L1 of the printing finger U1 at the present time, and whether or not the two coincide with each other so as not to affect the printing, that is, whether or not the deviation is not less than a predetermined value ( Step S8) is determined. If it is determined that the two are completely coincident or have deviated to such an extent that they do not affect printing even if they deviate (step S8; YES), the main body control unit 52 determines the printing data. Accordingly, the printing unit 40 is controlled to start printing on the nail region Ta (step S9).

  On the other hand, when it is determined that the xy coordinate value of the contour line of the fingernail image I1 and the xy coordinate value of the contour line L1 of the printing finger U1 at the present time have shifted by a predetermined value or more (step S8; NO), the main body control unit 52 stops the printing process by the printing unit 40 (step S10). In this case, the data correction unit 54 calculates a correction value from the amount of deviation between the two, and corrects the printing data with the correction value (step S11). Then, the main body control unit 52 controls the printing unit 40 to start printing on the nail area Ta in accordance with the corrected printing data corrected by the data correction unit 54 (step S9).

Even after the printing is started, the finger position detecting means 70 detects the outline L1 of the printing finger U1 at the present time (for example, see FIG. 10A, FIG. 11A, FIG. 12A) (step S12). The detection result is output to the control device 50.
The printability determination unit 53 compares the xy coordinate value of the contour line of the fingernail image I1 with the xy coordinate value of the latest contour line L1 of the print finger U1 sent from the finger position detection unit 70, It is determined whether or not they match to such an extent that they do not affect printing, that is, whether or not they deviate by a predetermined value or more (step S13). Then, if it is determined that the two are completely coincident or have deviated to the extent that they do not affect printing even if they deviate (step S13; YES), the main body control unit 52 causes the printing unit 40 to The printing on the nail area Ta is continued, and it is determined at any time whether the printing on the nail area Ta of the printing finger U1 is completed (step S14). When it is determined that printing on the nail area Ta of the printing finger U1 is completed (step S14; YES), the main body control unit 52 ends the printing process by the printing unit 40.
On the other hand, when it is determined that printing on the nail area Ta has not been completed (step S14; NO), the process returns to step S12 and the process is repeated.

  On the other hand, when it is determined that the xy coordinate value of the contour line of the fingernail image I1 and the xy coordinate value of the latest contour line L1 of the printing finger U1 have shifted by a predetermined value or more (step S13; NO), the main body control unit 52 Stops the printing process by the printing unit 40 (step S15). Then, the printability determination unit 53 determines whether or not the nail area Ta of the printing finger U1 to be printed is within the printable range A of the printing unit 40 (step S16). Specifically, from the xy coordinate value of the contour line L1 of the latest printing finger U1, the xy coordinate value of the nail region Ta corresponding to the contour line L1 is estimated, and from the estimated xy coordinate value of the nail region Ta, It is determined whether the nail area Ta to be printed is within the printable range A of the printing unit 40.

  For example, as shown in FIG. 11A, the xy coordinate value of the contour line L1 of the printing finger U1 is the entire printing finger U1 in the fingernail image I1 obtained by the imaging unit 30 (see FIG. 10B). Even when it deviates from the xy coordinate value of the contour line, the position of the nail region Ta estimated from the contour line L1 of the printing finger U1 is within the printable range A as shown in FIG. Yes. On the other hand, as shown in FIG. 12A, when the xy coordinate value of the contour line L1 of the printing finger U1 protrudes outside the printable range A, the xy of the printing finger U1 contour line L1. It is determined that the xy coordinate value of the nail area Ta estimated to correspond to the coordinate value also protrudes outside the printable range A as shown in FIG. In FIG. 11B and FIG. 12B, for convenience of explanation, the nail region Ta is indicated by a solid line, and the outline of the entire printing finger U1 is indicated by a two-dot chain line.

  When the printability determination unit 53 determines that the nail area Ta is not within the printable range A of the printing unit 40 (step S16; NO, for example, see FIGS. 12A and 12B), Since this cannot be dealt with by correcting the printing data, the main body control unit 52 stops printing by the printing unit 40 (step S17). In this case, it may be displayed on the display unit 13 that printing cannot be continued. In addition, a display that prompts the user to place the printing finger U1 at an appropriate position may be displayed on the display unit 13.

On the other hand, when the printability determination unit 53 determines that the nail area Ta is within the printable range A of the printing unit 40 (step S16; YES, for example, see FIGS. 11A and 11B). The data correction unit 54 calculates a correction value based on the amount of deviation between the xy coordinate value of the contour line of the fingernail image I1 and the xy coordinate value of the latest contour line L1 of the printing finger U1. Based on this correction value, the printing data is corrected so as to correspond to the xy coordinate value of the contour line L1 of the latest printing finger U1 (step S18). Then, the main body control unit 52 controls the printing unit 40 to resume printing on the nail area Ta according to the corrected printing data corrected by the data correction unit 54 (step S19).
Then, the main body control unit 52 determines whether printing on the nail area Ta of the printing finger U1 is completed at any time (step S14), and determines that printing on the nail area Ta of the printing finger U1 is completed (step S14). In S14; YES), the main body control unit 52 ends the printing process by the printing unit 40.
On the other hand, when it is determined that printing on the nail area Ta has not been completed (step S14; NO), the process returns to step S12 and the process is repeated.

  Here, the correspondence to one printing finger U1 has been described. However, when the printing process is simultaneously performed on a plurality of printing fingers U1, such as four, as in the present embodiment, the above processing is performed. Is repeated for each printing finger U1 to perform printing processing for all printing fingers U1.

As described above, according to the nail print apparatus 1 in the present embodiment, the xy coordinate value and the finger position of the contour line of the fingernail image I1 acquired by the photographing unit 30 before the start of printing are determined by the printability determination unit 53. When the latest xy coordinate value of the contour line L1 of the printing finger U1 sent from the means 70 is compared, it is determined whether or not both are deviated by a predetermined value or more. The printing unit 40 stops printing on the nail area Ta. For this reason, when the finger position is shifted to such an extent as to affect printing, it is possible to prevent erroneous printing at an inappropriate position.
Further, when the xy coordinate value of the contour line of the fingernail image I1 and the xy coordinate value of the latest contour line L1 of the printing finger U1 are shifted by a predetermined value or more, the printability determination unit 53 determines the contour of the printing finger U1. The xy coordinate value of the nail region Ta corresponding to the xy coordinate value of the line L1 is estimated. Then, it is determined whether or not the estimated nail area Ta is within the printable range A of the printing unit 40, and it is determined that the nail area Ta to be printed is not within the printable range A of the printing unit 40. When the printing is performed, printing by the printing unit 40 is stopped. For this reason, when it is outside the printable range A of the printing unit 40 and can no longer cope with the correction, it is possible to prevent erroneous printing at an inappropriate position.
When the nail area Ta is in the printable range A of the printing unit 40, the data correction unit 54 determines the xy coordinate value of the contour line of the fingernail image I1 and the latest contour line L1 of the printing finger U1. A correction value is calculated based on the amount of deviation from the xy coordinate value, and based on this correction value, the printing data is corrected so as to correspond to the xy coordinate value of the contour line L1 of the latest printing finger U1. For this reason, when it can respond by correction | amendment, it can respond | correspond by correction | amendment as much as possible, and it can avoid burdening a user as much as possible by the effort and time burden by re-printing etc.
In addition, since the finger position detection unit 70 can detect the contour line L1 of the printing finger U1 from the non-printing side of the printing finger U1, the position of the printing finger U1 (the contour line L1 of the contour line L1) is always required after printing is started. xy coordinate value) can be detected, and even when the printing finger U1 moves after the start of printing, it is possible to appropriately take measures such as stopping / stopping printing and correcting printing data.
Further, when it is determined that the nail area Ta to be printed is not within the printable range A of the printing unit 40, the user is notified by displaying the fact on the display unit 13 or the like. It is possible to take measures such as repositioning.

In the present embodiment, the finger position detection unit 70 is illustrated as including a plurality of detection units 72 including a light emitting element 73 and a light receiving element 741, but the configuration of the finger position detection unit 70 is shown here. It is not limited to things. The finger position detection means 70 can be applied to a configuration other than that exemplified here as long as it can detect the position and orientation of the printing finger U1 placed on the printing finger placement surface. A fingerprint sensor, a vein sensor, or the like may be used.
When a fingerprint sensor, a vein sensor, or the like is used as the finger position detection unit 70, the finger position detection unit 70 is used to identify the user who performs printing, and the default setting is used as a pattern for printing the pattern selected by the user in the past. Or using a fingernail image photographed in the past for the user as information on the user's print finger U1, for example, processing corresponding to an individual user may be performed.

Further, in the present embodiment, the display unit 13 is caused to function as a notification unit, and a display indicating that the nail area Ta is not within the printable range A of the printing unit 40 is displayed on the display unit 13 and the printing finger U1 is placed again. Although a prompting display or the like is made, the notification means is not limited to the display unit 13. For example, a sound generation means such as a buzzer or a speaker that emits voice guidance may be provided and used as a notification means.
Further, the notifying means may notify the user that the nail area Ta is not within the printable range A of the printing unit 40 by lighting or blinking the lamp.

  Further, in the present embodiment, the positional deviation of the printing finger U1 in the horizontal direction has been mainly described. However, for example, when the printing finger U1 is raised above the initial position set before starting printing, the finger placement is performed. The finger position detecting means 70 also detects the separation and lifting of the printing finger U1 from the means, and if the printing finger U1 is separated or lifted, the printing is not started or printing is in progress. May be stopped. In this case, it is determined whether or not this is within the correctable range, and if it is within the correctable range, printing is resumed after the correction is made. If correction is not possible, printing is stopped and the display unit 13 notifies the user to that effect.

  In the present embodiment, the first storage unit and the second storage unit are the storage unit 51 of the control device 50. However, the first storage unit and the second storage unit are the control device 50. The storage unit 51 is not limited to this, and a separate storage unit may be provided.

  In the present embodiment, the nail printing apparatus 1 capable of simultaneously printing on four fingers is taken as an example. However, the present invention is applied to an apparatus that performs printing sequentially by inserting fingers one by one into the apparatus. It is also possible to apply.

  In addition, it cannot be overemphasized that this invention is not limited to this embodiment, and can be changed suitably.

DESCRIPTION OF SYMBOLS 1 Nail printing apparatus 2 Case main body 4 Cover body 20a Printing finger insertion part 21 Bulkhead 30 Imaging | photography part 40 Printing part 50 Control part 51 Memory | storage part 52 Main body control part 53 Printability determination part 54 Data correction part I1 Finger nail image L1 Contour line T Nail Ta Nail area U1 Printing finger U2 Non-printing finger

Claims (9)

Finger placement means on which a finger is placed;
Photographing means for photographing a finger placed on the finger placing means to obtain a fingernail image;
A first storage unit that stores the coordinate value of the contour line of the fingernail image acquired by the photographing unit and the coordinate value of the nail region included in the fingernail image in association with each other;
Printing means for printing on the nail region;
After storing the coordinate value of the contour line of the fingernail image and the coordinate value of the nail region included in the fingernail image in the first storage unit in association with each other, the coordinate value is placed on the finger placement unit. Finger position detecting means for detecting the contour line of the placed finger from the non-printing side of the finger;
A second storage unit for storing the coordinate value of the contour line of the finger detected by the finger position detection unit;
Control means for controlling printing on the nail region by the printing means,
The control means includes
The coordinate value of the contour line of the fingernail image stored in the first storage unit and the coordinate value of the contour line of the finger stored in the second storage unit are compared, and both are predetermined values. Including a printability determination unit that determines whether or not the deviation has occurred;
The nail printing apparatus according to claim 1, wherein the control unit stops printing on the nail region by the printing unit when it is determined by the printing propriety determining unit that both are shifted by a predetermined value or more. The print availability determination unit includes:
When the coordinate value of the contour line of the fingernail image stored in the first storage unit and the coordinate value of the contour line of the finger stored in the second storage unit are shifted by a predetermined value or more, The coordinate value of the nail region corresponding to the coordinate value of the finger outline stored in the second storage unit is estimated, and the nail region to be printed is determined from the estimated coordinate value of the nail region by the printing unit. To determine whether it is within the printable range of
The said control means stops printing by the said printing means, when it determines with the nail | claw area | region which is a printing object not being in the printable range of the said printing means by the said printing availability determination means. The nail printing apparatus according to 1. The control means includes
This is a case where the coordinate value of the contour line of the fingernail image stored in the first storage unit and the coordinate value of the contour line of the finger stored in the second storage unit are shifted by a predetermined value or more. When the nail area to be printed is determined to be within the printable range of the printing means by the printing availability determining means, based on the coordinate value of the nail area estimated by the printing availability determining means, Including data correction means for correcting printing data based on the coordinate values of the nail region;
3. The nail printing apparatus according to claim 1, wherein the control unit controls the printing unit to perform printing based on the printing data corrected by the data correction unit. .   The information processing apparatus according to claim 2, further comprising a notifying unit that notifies that the nail area to be printed is not within the printable range of the printing unit. The nail printing apparatus as described. A photographing step of photographing a finger placed on the finger placing means to obtain a fingernail image;
A first storage step for storing the coordinate value of the contour line of the fingernail image acquired in the photographing step in association with the coordinate value of the nail region included in the fingernail image;
A printing step of printing on the nail region by a printing means;
After storing the coordinate value of the contour line of the fingernail image and the coordinate value of the nail region included in the fingernail image in the first storage unit in association with each other, the coordinate value is placed on the finger placement unit. A finger position detecting step for detecting the contour line of the placed finger from the non-printing side of the finger;
A second storage step of storing the coordinate value of the contour line of the finger detected in the finger position detection step;
The coordinate value of the contour line of the fingernail image stored in the first storage step is compared with the coordinate value of the contour line of the finger stored in the second storage step. A printability determination step that determines that printing cannot be started or continued if
A printing control step of stopping printing on the nail region by the printing means when it is determined that printing cannot be started / continued in the printing propriety determination step;
A printing control method comprising: The printing propriety determination step includes
When the coordinate value of the contour line of the fingernail image stored in the first storage step and the coordinate value of the finger contour line stored in the second storage step deviate by a predetermined value or more, the first The coordinate value of the nail region corresponding to the coordinate value of the contour line of the finger stored in step 2 is estimated, and the nail region to be printed can be printed by the printing unit from the estimated coordinate value of the nail region. Determining whether it is within range,
The printing control step stops printing by the printing unit when it is determined that the nail area to be printed is not within the printable range of the printing unit in the printing propriety determination step. Item 6. The print control method according to Item 5. The printing control step includes
The coordinate value of the contour line of the fingernail image stored in the first storage step and the coordinate value of the contour line of the finger stored in the second storage step are shifted by a predetermined value or more, When it is determined in the printability determination step that the nail region to be printed is within the printable range of the printing unit, based on the coordinate value of the nail region estimated in the printability determination step, Including a data correction step of correcting data for printing based on the coordinate value of the nail region,
7. The print control according to claim 5, wherein the print control step controls the printing unit to perform printing based on the print data corrected in the data correction step. Method. Finger placement means on which a finger is placed;
Photographing means for photographing a finger placed on the finger placing means to obtain a fingernail image;
First storage control means for storing the coordinate value of the contour line of the fingernail image acquired by the photographing means and the coordinate value of the nail region included in the fingernail image in association with each other;
After the coordinate values of the contour line of the fingernail image and the coordinate values of the nail region are stored in association with each other by the control of the first storage control unit, the finger placed on the finger placement unit is stored. Finger position detecting means for detecting the position of
Second storage control means for storing coordinate values of the contour line of the finger detected by the finger position detection means;
The coordinate value of the second storage control means contour of the fingernail image being more stored in the control of the first storage control means and the coordinate values of the contour line of the finger stored by the control of the In comparison, a printability determination unit that determines whether or not both have deviated by a predetermined value or more;
If it is determined by the printability determination unit that both have deviated by a predetermined value or more, printing on the fingernail area placed on the finger placing unit is stopped, and both have not deviated by a predetermined value or more. A print control means for controlling to perform printing on the fingernail area placed on the finger placement means,
A nail printing apparatus comprising: In a printing control method used in a nail printing apparatus including a finger placing unit on which a finger is placed and a photographing unit that takes a finger placed on the finger placing unit and obtains a fingernail image ,
A first storage control step of storing the coordinate value of the contour line of the fingernail image acquired by the photographing unit and the coordinate value of the nail region included in the fingernail image in association with each other;
The finger placed on the finger placement means after the coordinate value of the contour line of the fingernail image and the coordinate value of the nail region are stored in association with each other by the control of the first storage control step. A finger position detecting step for detecting the position of
A second storage control step of storing the coordinate value of the contour line of the finger detected by the finger position detection step;
The coordinate values of the contour line of the second storage control step the fingernail image being more stored in the control of the coordinate values of the contour line of the finger stored the first storage control step by the control of the In comparison, a printability determination step for determining whether or not both have deviated by a predetermined value or more;
If it is determined in this printability determination step that both have deviated by a predetermined value or more, printing on the fingernail area placed on the finger placing means is stopped, and both have not deviated by a predetermined value or more. A print control step for controlling to perform printing on the fingernail area placed on the finger placement means,
A printing control method comprising:

Images