CN213211034U

CN213211034U - Barcode scanner for identifying background color of barcode by using black-and-white barcode reader

Info

Publication number: CN213211034U
Application number: CN202022263522.4U
Authority: CN
Inventors: 李亭
Original assignee: Suzhou Kaishi Information Technology Co ltd
Current assignee: Suzhou Kaishi Information Technology Co ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-05-14
Anticipated expiration: 2030-10-13

Abstract

The utility model provides an use bar code scanner of black and white bar code reader identification bar code background colour pastes red color filter, green filter and blue filter respectively and adorns on sweeping a yard window, and imaging lens system is located the rear of sweeping a yard window, and black and white imaging sensor is located imaging lens system's rear. When light reflected by the bar code passes through the code scanning window, the light is filtered by three filters of red, green and blue respectively, and then is imaged on a black-and-white imaging sensor through a lens imaging system, tristimulus values of red, green and blue corresponding to the north background color of the bar code can be obtained according to the brightness values of the red, green and blue regions, and the background color is obtained through the brightness values of the three primary colors of the light.

Description

Barcode scanner for identifying background color of barcode by using black-and-white barcode reader

Technical Field

The utility model relates to a bar code scanner especially relates to an use bar code scanner of black and white code reader discernment bar code background colour.

Background

In modern production activities, bar codes are an effective way to store product information, and the effective information of products can be obtained by scanning and reading the bar codes through a bar code scanner. In order to realize visual management of the production process, bar codes are often printed on label paper with different colors, and the requirement of simultaneously identifying the colors of the labels exists in the process of reading the bar codes by using a bar scanner; however, most of the existing barcode readers use a black-and-white imaging sensor, and cannot identify color information, so that a barcode reader which uses a black-and-white barcode reader to identify the background color of the barcode at the same time is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a bar code scanner which uses a black and white bar code reader to identify the background color of a bar code.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a code scanner for identifying the background color of a bar code by using a black-and-white code reader comprises a red filter, a green filter, a blue filter, a code scanning window, an imaging lens system and a black-and-white imaging sensor; the red optical filter, the green optical filter and the blue optical filter are respectively attached to the code scanning window, the imaging lens system is positioned behind the code scanning window, and the black-and-white imaging sensor is positioned behind the imaging lens system;

when the bar code with the background color is placed in front of the code scanning window, light reflected by the bar code passes through the code scanning window and the red light filter, the green light filter and the blue light filter on the code scanning window, passes through the imaging lens system, reaches the photosensitive surface of the black-and-white imaging sensor, and is imaged.

Preferably, the red filter, the green filter and the blue filter are installed inside the code scanning window.

Preferably, the red filter, the green filter and the blue filter are independently attached to the center of the code scanning window.

Preferably, the size and shape of the red filter, the green filter and the blue filter are the same.

Compared with the prior art, the beneficial effects of the utility model are that:

on the basis of an original code scanner, filters with three colors of red, green and blue are respectively attached to a code scanning window, when light reflected by a bar code passes through the code scanning window, the light is respectively filtered by the three filters of red, green and blue, and is imaged on a black-white imaging sensor through a lens imaging system, three color values of red, green and blue corresponding to the north background color of the bar code can be obtained according to the brightness values of the red, green and blue areas, and the background color is obtained through the brightness values of the three primary colors of the light. The utility model discloses carry out simple institutional advancement on the basis of current bar code scanner, can conveniently use the background colour of black and white bar code reader identification bar code fast, with low costs and repacking convenience, it can be minimum to occupy the volume, very is fit for being applied to on the current bar code scanner.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a barcode reader using black and white code reader to identify the background color of the barcode;

fig. 2 is a schematic diagram of the image formation on the photosensitive surface of the black-and-white imaging sensor.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 and 2, a barcode reader for identifying the background color of a barcode by using a black-and-white barcode reader comprises a red filter 1, a green filter 2, a blue filter 3, a barcode scanning window 4, an imaging lens system 5 and a black-and-white imaging sensor 6; the red filter 1, the green filter 2 and the blue filter 3 are respectively attached to the code scanning window 4, the imaging lens system 5 is positioned behind the code scanning window 4, and the black-and-white imaging sensor 6 is positioned behind the imaging lens system 5;

current scanners typically use either coaxial imaging systems or tilt-shift imaging systems; the bar code is placed in front of a code scanning window 4, light emitted by a light source irradiates the bar code, the reflected light reaches the photosensitive surface of a black-and-white imaging sensor 6 through an imaging lens system 5, and is decoded by a photoelectric converter and a decoder and then interpreted into a digital signal which can be directly received by a computer, so that bar code information can be obtained. The utility model discloses increase red green blue tristimulus filter on sweeping yard window 4, place sweeping yard window 4 the place ahead when the bar code that has the background colour, the light of bar code reflection passes sweeps yard window 4 and sweeps red light filter 1, green light filter 2, blue light filter 3 on yard window 4, reachs black and white imaging sensor 6's photosurface and formation of image behind imaging lens system 5. The light reflected by the bar code only transmits red light after passing through the red light filter 1, only transmits green light after passing through the green light filter 2, only transmits blue light after passing through the blue light filter 3, the red, green and blue light are respectively and independently imaged on the black-and-white imaging sensor 6, a red imaging area 7 corresponding to the red light, a green imaging area 8 corresponding to the green light and a blue imaging area 9 corresponding to the blue light are arranged on the photosensitive surface of the black-and-white imaging sensor 6, and the black-and-white imaging sensor 6 respectively measures the brightness values corresponding to the three primary colors, so that the background color of the bar code is obtained.

Preferably, the red filter 1, the green filter 2 and the blue filter 3 are installed inside the code scanning window 4, so that the problem that the filters are pasted outside the code scanning window 4 and rubbed to fall or be polluted is avoided, and the measurement accuracy of the brightness values of red light, green light and blue light in bar code reflected light is ensured.

Preferably, the red filter 1, the green filter 2 and the blue filter 3 are attached to the center of the code scanning window 4 independently, so that red light, green light and blue light in light reflected by the bar code can be filtered independently, pure brightness values of the red light, the green light and the blue light are obtained, and the background color of the bar code can be calculated conveniently through the brightness values of the three primary colors of light.

Preferably, the red filter 1, the green filter 2 and the blue filter 3 are the same in size and shape, so as to ensure that the filtered red light, green light and blue light are the same in quantity and controllable.

The utility model provides a pair of use bar code reader of black and white bar code recognition bar code background colour carries out simple institutional advancement on the basis of current bar code reader, can use the background colour of black and white bar code reader recognition bar code fast conveniently, and with low costs and repacking convenience occupy the volume and can be minimum, very be fit for being applied to on the current bar code reader.

The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.

Claims

1. A barcode scanner for recognizing the background color of a barcode using a black and white barcode reader, comprising: the color filter comprises a red filter, a green filter, a blue filter, a code scanning window, an imaging lens system and a black-and-white imaging sensor; the red optical filter, the green optical filter and the blue optical filter are respectively attached to the code scanning window, the imaging lens system is positioned behind the code scanning window, and the black-and-white imaging sensor is positioned behind the imaging lens system;

2. The scanner of claim 1, wherein the scanner recognizes a background color of the barcode using a black and white reader, further comprising: the red filter, the green filter and the blue filter are arranged inside the code scanning window.

3. The scanner of claim 1, wherein the scanner recognizes a background color of the barcode using a black and white reader, further comprising: the red filter, the green filter and the blue filter are independently attached to the center of the code scanning window.

4. The scanner of claim 1, wherein the scanner recognizes a background color of the barcode using a black and white reader, further comprising: the red filter, the green filter and the blue filter are the same in size and shape.