JP3135730B2 - Paint surface defect indication method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint surface defect display method for detecting a paint surface defect on a surface to be inspected by image processing and displaying the result as a display defect mark.

[0002]

2. Description of the Related Art When detecting a paint surface defect on a painted surface of a car body, an image of a lighting device reflected on the painted surface is taken by an image pickup means such as a camera, and defects on the painted surface (for example, spots, scratches, etc.) are detected. Conventionally, an image processing method for detecting is widely used. The image processing method is generally performed by scanning a surface to be inspected by an image processing means and inspecting each captured image for the presence or absence of a defect.

As disclosed in Japanese Patent Application Laid-Open No. 62-233710, a laser slit light is projected onto a surface to be inspected, and its reflected light is projected onto a screen. A method for detecting surface defects has been proposed.

[0004]

By the way, the position, type (information such as repair contents and level), the number, etc. of the defects detected by the above image processing method are displayed on a display device such as a CRT or a printer. It is necessary to notify the operator of the post-process (that is, the repair process) by printing in a similar manner.

As a conventional defect display method, as shown in FIG. 7, the position, type, etc. of a defect on a surface W to be inspected are indicated by three types of display defect marks M ₁ on a monochrome screen. , M ₂ and M ₃ . Here, the display defect mark M ₁ (that is, a black square) is a heavy defect (defect such as repelling), the display defect mark M ₂ (that is, a black triangle) is a medium defect (defect such as a large dot, a defect such as a flaw), The display defect mark M ₃ (that is, a black circle) indicates a small defect (a defect such as a small spot). Further, when a color screen is used, as shown in FIG. 9, some display defect marks M ₁ , M ₂ , and M ₃ are displayed as red circles, pink circles, and yellow circles.

[0006] However, in the case of a paint surface defect, the occurrence of the defect is extremely irregular, and it is a single defect or a plurality of defects occur in a predetermined range in close proximity. In the case of a single defect, it is not difficult to determine the position and type of the defect, but when a plurality of defects are close to each other,
There is a risk of misidentifying or overlooking the type and number of defects.

For example, consider the case where a plurality of types of defects are closely mixed in a portion indicated by a defect proximity portion Z in FIGS. 7 and 9. As shown in FIG. 8 and FIG. In the proximity portion Z, a heavy defect, a medium defect, and a small defect are mixed, and the respective display defect marks M ₁ , M
_2, M ₃ is a to be displayed, the actual display screen, as shown in FIGS. 7 and 9, the display defect mark M _1, M _2, M ₃ when the to (extreme proximity Are superimposed on each other), which makes it extremely difficult for a worker in the repair process to confirm the information, resulting in erroneous recognition or oversight.

The above-mentioned erroneous recognition and oversight of defects (especially erroneous recognition and oversight of heavy defects) have a very large effect on the finish of the coating. It is the current situation.

The present invention has been made in view of the above points, and when there are a plurality of defects close to a predetermined range, a worker in a post-process confirms the position, type, number, and the like of the defects. The purpose is to display the information easily.

[0010]

According to the first aspect of the present invention, as a means for solving the above-mentioned problems, a paint surface defect on a surface to be inspected is inspected and the result is displayed as a display defect mark. In the method, a defect proximity portion in which a plurality of defects are closely mixed in a predetermined range on a surface to be inspected is detected, and a defect having the highest degree of defect among the defects in the defect proximity portion is displayed as a representative display defect mark. Like that.

According to a second aspect of the present invention, as a means for solving the above-mentioned problems, in the method for displaying a painted surface defect according to the first aspect, the size of the representative display defect mark is determined by:
The number of defects is defined according to the number of defects in the vicinity of the defect.

According to a third aspect of the present invention, as a means for solving the above-mentioned problems, in the method for displaying a paint surface defect according to the first or second aspect, the display defect mark is displayed by a difference in the shape of the defect. Is set to

According to a fourth aspect of the present invention, as a means for solving the above-mentioned problems, in the method for displaying a paint surface defect according to the first, second or third aspect, the display defect mark is determined by determining a degree of the defect by a color difference. Is set to be displayed.

[0014]

According to the first aspect of the present invention, the following effects can be obtained by the above means.

That is, a display defect mark for displaying a defect having a high degree of defect among a plurality of adjacent defects in a predetermined range is displayed as a representative, and the positions, types, etc. of the plurality of adjacent defects can be determined. This can be easily confirmed visually by the user.

According to the second aspect of the present invention, the following effects can be obtained by the above means.

That is, a display defect mark that displays a defect having a high degree of defect among a plurality of defects that are close to each other in a predetermined range is displayed as a representative, and the size of the representative display defect mark is changed depending on the number of defects. This means that the operator can easily determine the number of adjacent defects.

According to the third or fourth aspect of the present invention, the following effects can be obtained by the above means.

That is, the type of the defect can be easily determined based on the shape or color of the display defect mark.

[0020]

According to the first aspect of the present invention, there is provided a coating surface defect displaying method for inspecting a coating surface defect on a surface to be inspected and displaying the result as a display defect mark. Is detected, and the defect having the highest degree of defect among the defects in the defect adjacent portion is displayed as a representative display defect mark. The type and the like can be easily visually confirmed by the operator, and there is an excellent effect that the workability in the subsequent process (that is, the repair process) can be improved.

According to the second aspect of the present invention, in the method of displaying a coating surface defect according to the first aspect, the size of the representative display defect mark is defined according to the number of defects in the vicinity of the defect. The operator can easily determine the number of the plurality of adjacent defects, and there is an excellent effect that the workability in the subsequent process (that is, the repair process) can be further improved.

According to the third aspect of the present invention, in the method for displaying a paint surface defect according to the first or second aspect, the display defect mark is set so that the degree of the defect is displayed by a difference in shape. The shape of the defect makes it possible to easily determine the type of defect visually, and there is an excellent effect that the workability in the post-process (that is, the repair process) can be improved with an extremely simple display.

According to the fourth aspect of the present invention, in the method for displaying a coating surface defect according to the first, second, or third aspect, the display defect mark is set so that the degree of the defect is displayed by a color difference. The type of the defect can be easily visually discriminated by the color of the defect mark, and there is an excellent effect that the workability in the post-process (that is, the repair process) can be improved with a very simple display.

[0024]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

First Embodiment FIGS. 1 and 2 show a display mode in a method for displaying a paint surface defect according to a first embodiment of the present invention. This embodiment corresponds to the first to third aspects of the present invention.

The method for displaying a coating surface defect according to this embodiment is shown in FIG.
As shown in FIG. 1, the painted surface of the vehicle body is a surface to be inspected W, and the surface to be inspected W is sequentially (for example, 〜) imaged by an image processing means 1 comprising a strobe 2 and a camera 3, and The present invention relates to a display method for displaying a result together with an automobile on a display device (not shown) such as a CRT after detecting a defect in W.

In the case of the present embodiment, as shown in FIG. 1, a surface to be inspected W (specifically,
The position and type of the defect on the vehicle body) are displayed. For example, a heavy defect is displayed as a display defect mark M ₁ (black square), a medium defect is displayed as a display defect mark M ₂ (black triangle), and a small defect is displayed as a display defect mark M ₃ (black circle). May be as if these display defects marks M _1, M _2, M ₃ are apart display, a plurality of display defect mark M ₁ as in the defect proximity portions Z of FIG. 7, M _2, M
If _{the 3} are close to each other, as in FIGS. 1 and 2, the display defect mark M ₁ to display the largest of the defect degree of the plurality of display defects marks M _1, M _2, M ₃ is It is displayed as a representative. The reason why the defect having the highest degree of defect is displayed as a representative is to surely carry out a repair having a high degree of importance in a repair process which is a subsequent process.

The size of the representative display defect mark M ₁ is determined in accordance with the number of defects in the defect proximity part Z. For example, if the number of defects is 3
Less than, 3-5, 5 or more are defined as large, medium, and small in three stages.

Next, a method for displaying a paint surface defect according to the present embodiment will be described with reference to a flowchart shown in FIG.

An image of the inspection surface W is fetched by using the image processing means 1 shown in FIG. 3 (step S ₁ ), and the presence or absence of a defect on the inspection surface W is determined in step S ₂ . Here, when it is judged that "there is a defect", the flow proceeds to step S _3, a determination is made whether the defect is in the position of the inspection surface W throat. Then, the type of the defect in step S ₄ (i.e., severe defect, middle defect, small defects) a determination is made.

Next, in step S _5, the determination of the presence or absence of a defect near portion Z where a plurality of defects are close in a predetermined range is performed, when it is determined that "there is a defect near portion Z", step S _Proceeding to ₆ , the type of defect in the defect proximity portion Z is determined. Thereafter, the determination of the type of defect in the defect proximity portions Z made in step S _6, the case of the representative display defect mark (in this embodiment to display the most defective degree larger the defect the proximal part Z in step S _7, display defects The determination of the mark M ₁ ) is made.

[0032] Then, the determination of the number of defects in the defect proximity portions Z is made at step S _8, the representative display defect mark (in this embodiment, display defects mark M ₁₎ in step S ₉ magnitude of is determined, step its position display is made in S _10.

[0033] When it is determined that "no defect near portion" in step S _5, the routine proceeds directly to step S _10, the display of the defect position is made.

[0034] The above process is repeated until the inspection with the image processing unit 1 has been finished is determined in step S _11.

As described above, in the case of this embodiment, a defect proximity portion Z in which a plurality of defects are closely mixed in a predetermined range on the surface to be inspected W is detected. since the operator displays display defect mark M ₁ to display the large degree of defect as the representative, the position of the plurality of defects in proximity, it is possible to type like operator can easily confirm visually, post-process ( That is,
The workability in the repair process can be improved.

Further, the size of the representative display defect mark M _1, because you have to define according to the number of defects in the defect proximity portions Z, can be easily discriminated operator the number of the plurality of defects close Thus, the workability in the post-process (that is, the repair process) can be further improved.

Second Embodiment FIGS. 5 and 6 show a display mode in a method for displaying a paint surface defect according to a second embodiment of the present invention. This embodiment corresponds to the first, second and fourth aspects of the present invention.

In the case of the present embodiment, a display device having a color screen is used, and the display defect marks M ₁ , M
The _2, M _3, are red circle, pink circle, yellow circle. That is, only the type of defect is distinguished by the difference in color from the first embodiment, and the other configuration and operation and effect are the same as those of the first embodiment.

Embodiment 3 This embodiment corresponds to the first to fourth aspects of the present invention.

In this embodiment, the first and second embodiments are used in combination, and the display defect marks M ₁ , M ₂ , and M ₃ are a red square, a pink triangle, and a yellow circle. That is,
The only difference is that the types of defects are distinguished by differences in shape and color.

[Brief description of the drawings]

FIG. 1 is a view showing a display mode in a coating surface defect display method according to Example 1 of the present invention.

FIG. 2 is an enlarged view of a portion near a defect in FIG. 1;

FIG. 3 is a schematic diagram showing an image processing mode in a method for displaying a coating surface defect according to the first embodiment of the present invention.

FIG. 4 is a flowchart for explaining the operation of the method for displaying a paint surface defect according to the first embodiment of the present invention;

FIG. 5 is a diagram showing a display mode in a coating surface defect display method according to a second embodiment of the present invention.

FIG. 6 is an enlarged view of a defect proximity portion in FIG.

FIG. 7 is a view showing a display mode in a method of displaying a paint surface defect according to a conventional example.

FIG. 8 is an enlarged view of a portion near a defect in FIG. 7;

FIG. 9 is a view showing a display mode in a method of displaying a paint surface defect according to another conventional example.

FIG. 10 is an enlarged view of a portion near a defect in FIG. 9;

[Explanation of symbols]

1 is an image processing means, 2 is a strobe, 3 is a camera, W is a surface to be inspected, and Z is a defect proximity portion.

Continuation of front page (58) Fields investigated (Int.Cl. ⁷ , DB name) G01B 11/30 G01N 21/88 G06T 1/00 300 G06T 1/00 400 G06T 11/00 100 G01D 7/00

Claims (4)

(57) [Claims] 1. A paint surface defect display method for inspecting a paint surface defect on a surface to be inspected and displaying the result as a display defect mark, wherein a plurality of defects are closely mixed in a predetermined range on the surface to be inspected. A method of displaying a paint surface defect, wherein a defect near the defective portion is detected, and a defect having the highest degree of defect among the defects near the defect is displayed as a representative display defect mark. 2. The method according to claim 1, wherein the size of the representative display defect mark is determined according to the number of defects in the vicinity of the defect. 3. The method according to claim 1, wherein the display defect mark is set so as to display the degree of the defect by a difference in shape. 4. The method according to claim 1, wherein the display defect mark is set so as to display a degree of the defect by a color difference.