TWI684818B - Camera device - Google Patents

Abstract

Present invention is related to a camera device having a lampshade. The lampshade comprises an upright reflecting annular film and a reflecting film being mounted on a top of the upright reflecting annular film. An inner side of the lampshade has a rough surface enable to cause diffuse reflection for a light. An image identification camera is mounted on the reflecting film and filming downwardly with focusing on an area under the upright reflecting annular film. A light bar is mounted on an inner side of a bottom edge of the upright reflecting annular film. The light bar has multiple light bulbs. Each light bulb is oriented toward the rough surface of the lampshade with an angle of 90 degree to an pitch angle of +/- 10 degrees. When an object being placed under the lampshade, the image identification camera of the present invention is able to capture an image of the object via the diffused or reflected light projected toward the rough surface by the light bulbs. The present invention is able to provide a higher quality of image identification and preventing light spots causing by a plastic film of the object being captured by the camera.

Description

Photographic installation

The invention relates to a photographic structure, in particular to a photographic device for obtaining a better photographic identification image through a diffuse reflection light source.

Existing image recognition devices use a lens to photograph the surface of the identified object, and then perform image processing and identification procedures on the captured digital image, thereby calibrating the identified object with defects on the surface, which is often used for quality control or selection of product manufacturing. Items with specific image characteristics.

Although the above-mentioned existing image recognition device can shoot and recognize the recognized object, since the light source used in shooting is mainly the light source of the direct recognition object, if the recognized object is an object with a film on the surface, it is easy to The reflection at the wrinkle makes the image of the recognized object appear light spots that hinder the image recognition at that place.

Since the current image recognition uses a direct light source to illuminate the recognition object, if the recognition object has a glue film on the surface, the captured image is likely to generate light spots at the wrinkles of the glue film to hinder the recognition. To this end, the present invention utilizes the structure in which the lampshade and the light source cooperate to prevent the light source from directly focusing on the identification object and achieve the effect of clearing the image of the identification object.

In order to achieve the above object of the invention, the present invention provides a photographing device, the structure of which includes: A lampshade includes a vertical and surrounding reflective ring sheet and a reflective top sheet combined with the top edge of the reflective ring sheet, the reflective top sheet closes the top of the reflective ring sheet, and the reflective ring sheet and the reflective top sheet A rough surface capable of diffusely reflecting light is formed on the inner surface of the film; an image recognition lens is provided on the reflective top film, the image recognition lens is shot downward and the focus position is directly below the surrounding area of the reflective ring film; And a strip-shaped light source, which is arranged inside the bottom edge of the reflective ring sheet, the strip-shaped light source is irradiated toward the rough surface of the reflective ring sheet at an angle of perpendicular to plus or minus 10 degrees of pitch, so that the lampshade can emit downward diffusion Secondary light source after reflection.

Further, the lampshade of the present invention is a white cover.

Furthermore, the strip-shaped light source of the present invention includes a light bar, which is disposed inside the bottom edge of the reflection ring sheet in a surrounding manner, the light bar is provided with a plurality of light bulbs, and the plurality of light bulbs are perpendicular to the pitch An angle of plus or minus 10 degrees faces the rough surface of the reflective ring sheet.

Preferably, the light bar of the present invention is equidistant from the bottom edge of the reflective ring sheet and has a distance of 40 mm.

Preferably, the distance between the central axis of the lampshade and the reflective ring sheet of the present invention is greater than 220mm.

Preferably, the focusing position of the image recognition lens of the present invention is between 40mm and 50mm directly below the surrounding area of the reflection ring.

Preferably, the image recognition lens of the present invention is placed in the center of the reflective top sheet.

When the invention is used, the lampshade is fixed directly above the recognition object, the lampshade diffuses the light of the strip light source to illuminate the recognition object downward, and then the image recognition lens is used to shoot down the image of the surface of the recognition object , The image of the identification object captured by the image identification lens provides a subsequent image identification procedure.

The effect of the present invention is that since the light emitted downward by the lampshade is a secondary light source after multiple diffuse reflections on the rough surface, the light source is soft and it is not easy to reflect to generate light spots, so even if the surface of the recognition object captured by the image recognition lens has a film There will also be no obvious spots of strong concentrated light reflection at the folds of the film, so that the image captured by the image recognition lens is sufficient to provide image recognition, and improve the effect and success rate of image recognition.

10‧‧‧Shade

11‧‧‧Reflective ring film

12‧‧‧Reflective top film

20‧‧‧Image recognition lens

30‧‧‧Strip light source

31‧‧‧Light bar

32‧‧‧ Bulb

40‧‧‧Identification

41‧‧‧Conveyor line

A‧‧‧Rough

B‧‧‧Bracket

FIG. 1 is a schematic perspective view of a preferred embodiment of the present invention.

2 is a schematic cross-sectional view of a preferred embodiment of the present invention.

FIG. 3 is a schematic diagram of the implementation of the preferred embodiment of the present invention.

In order to understand the technical features and practical effects of the present invention in detail, and can be implemented in accordance with the content of the specification, the preferred embodiments shown in the drawings are further described in detail below.

As shown in FIGS. 1 and 2, the preferred embodiment of the present invention is a photographing device including a lampshade 10, an image recognition lens 20 and a strip-shaped light source 30, wherein: the lampshade 10 includes a reflective ring 11 And a reflective top sheet 12, the reflective ring sheet 11 is a vertical and surrounding sheet, the preferred choice is a light-colored, such as white, off-white, beige or light gray circular or square ring sheet or The plate body, as in this preferred embodiment, the reflective ring sheet 11 is a white square ring-shaped sheet body, and the distance between the central axis of the lampshade 10 and the reflective ring sheet 11 is greater than 220 mm; the reflective top sheet 12 is combined in Between the top edges of the reflective ring sheet 11, the reflective top sheet 12 closes the top of the reflective ring sheet 11, so that the lampshade 10 becomes a square cover with an open bottom. Between the reflective ring sheet 11 and the reflective top sheet The inner surface of 12 respectively forms a rough surface A capable of diffusely reflecting light, It can convert the concentrated light irradiated into the lampshade 10 into diffused soft light after diffuse reflection more than once.

The image recognition lens 20 is disposed on the reflective top sheet 12 and can be shot downward. As in the preferred embodiment, the image recognition lens 20 is placed through the center of the reflective top sheet 12 to shoot downward. The image recognition lens 20 The focusing position is located directly under the surrounding range of the reflective ring sheet 11. The aforementioned preferred focusing position is a position between 40mm and 50mm directly under the surrounding range of the reflecting ring sheet. The diffuse light irradiating here has passed Multiple diffuse reflections, the soft light is not easy to reflect and produce a light spot, which is the best position for the recognized object to accept the captured image.

The strip-shaped light source 30 is disposed on the inner side of the bottom edge of the reflective ring 11 through a bracket B connected to the lampshade 10. According to the preferred embodiment, the strip-shaped light source 30 includes four strips 31 arranged in a rectangular shape. Each light bar 31 is located on the inner side of each side of the bottom edge of the reflection ring piece 11, and each light bar 31 is provided with a plurality of LED light bulbs 32. The four light bars 31 may be separated from each side or may be connected as Integrally arranged, a plurality of light bulbs 32 are irradiated toward the rough surface A of the reflection ring sheet 11 at an angle from vertical to plus or minus 10 degrees of pitch, and a plurality of light bulbs 32 irradiate the straight line of the rough surface A from a low position in the lampshade 10 The light, after more than one diffuse reflection on the two rough surfaces A, enables the lampshade 10 to emit a secondary light source after multiple diffuse reflections downward. This light source is soft and difficult to reflect to generate a light spot.

As shown in FIG. 3, when the present invention is used, the lampshade 10 is fixed above the conveying line 41 that conveys the identification object 40. When the conveying line 41 conveys the identification object 40 directly under the lampshade 10 for image recognition, the The surface of the identification object 40 is located at a preferred lighting position between 40 mm and 50 mm directly under the lampshade 10. Then, the image recognition lens 20 is used to shoot down the image of the recognition object 40. The image recognition lens 20 may be an autofocus lens or a fixed focus lens. If it is a fixed focus lens, the depth of field of the focal length covers at least 40 mm directly below the lamp cover 10 Up to 50mm.

When the image recognition lens 20 photographs the recognition object 40, the light source diffusely reflected downward from the lampshade 10 is used as the main light source for illuminating the recognition object 40. As mentioned earlier, due to the downward movement of the lampshade 10 The secondary light source after multiple diffuse reflections is soft, and the light source is not easy to reflect and generate light spots. Therefore, there is no concentrated strong light when illuminating the recognition object 40, so that even the surface of the recognition object 40 has wrinkles of the adhesive film, It also does not cause obvious light spots at the folds, so that the image recognition lens 20 captures the image of the recognition object 40 is sufficient to provide image recognition, and enhances the image recognition lens 20 to capture the image of the recognition object 40 to provide the image recognition effect.

In addition to the above-mentioned first preferred embodiment, the strip-shaped light source 30 of the present invention is in the form of a light bar, and the strip-shaped light source 30 may also be in the form of a lamp tube. Each lamp tube covers an opaque lamp cover, and each lamp cover only forms a strip-shaped opening in a direction toward the rough surface A, so that each lamp tube of the strip-shaped light source 30 can be irradiated only through the opening of the lamp cover The rough surface A of the reflective ring sheet 11 causes the linear light source emitted by the strip light source 30 to diffusely reflect to soft light through the rough surface A and then illuminate the identification object, so as to avoid the light source directly illuminating the identification object to generate light spots that hinder image recognition.

The above are only preferred embodiments of the present invention and are not intended to limit the scope of the claimed rights of the present invention. Any other equivalent changes or modifications made without departing from the spirit of the present invention should be included in the present invention Within the scope of patent application.

10‧‧‧Shade

11‧‧‧Reflective ring film

12‧‧‧Reflective top film

20‧‧‧Image recognition lens

30‧‧‧Strip light source

31‧‧‧Light bar

32‧‧‧ Bulb

B‧‧‧Bracket

Claims (7)

A photographing device, its structure includes: a lampshade, the lampshade includes a vertical and surrounding reflective ring sheet and a reflective top sheet combined with the top edge of the reflective ring sheet, the reflective top sheet closes the top of the reflective ring sheet, in The reflective ring sheet and the inner surface of the reflective top sheet respectively form a rough surface capable of diffusely reflecting light; an image recognition lens is provided on the reflective top sheet, the image recognition lens is shot downward and the focusing position is located on the reflection Directly below the surrounding area of the ring sheet; and a strip-shaped light source, which is arranged inside the bottom edge of the reflective ring sheet, and the strip-shaped light source illuminates the rough surface of the reflective ring sheet at an angle perpendicular to plus or minus 10 degrees of pitch, The lampshade can emit the secondary light source after diffuse reflection downward. The photographing device according to claim 1, wherein the lamp cover is a white cover body. The photographing device according to claim 2, wherein the strip-shaped light source includes a light bar, the light bar is disposed inside the bottom edge of the reflection ring sheet in a surrounding manner, and the light bar is provided with a plurality of light bulbs. The photographic device of claim 3, wherein the light bar is equidistant from the bottom edge of the reflective ring sheet and is at a distance of 40 mm. The photographing device according to any one of claims 1 to 4, wherein the distance between the central axis of the lamp cover and the reflection ring sheet is greater than 220 mm. The photographing device according to claim 5, wherein the focus position of the image recognition lens is between 40 mm and 50 mm directly below the surrounding area of the reflection ring sheet. The photographing device according to claim 5, wherein the image recognition lens is placed in the center of the reflective top sheet.

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