Barcode-Recognition

Barcode Recognition (Pharmacode)

This program can read the pharmacode. It can perform robust and fast detection even when multiple pharmacodes are in the picture.

Best of my knowledge, this is the first public implemantation that can decode a pharmacode, as there no publicly available program. If anyone is familiar with barcode recognition algorithms, please help us improve the program.

Environment

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• CMake 3.10
• Ubuntu 20.04 LTS
• OpenCV 4.5.2
• TBB

Build & Run

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Clone & Build

git clone https://github.com/shun74/Barcode-Recognition.git
cd Barcode-Recognition
sh build.sh

Run

Scan one image.

./build/scan_multiple ./config/sample_config.conf ./images/test_1.jpg

Realtime scan with camera. (Necessary to connect camera before run)

./build/real_time ./config/fast_run_config.conf

Performance

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Preparing two configurations and measured execution times. Also mesured the execution time on edge device. it may be possible to improve the settings for even faster detection.

config	Core i7-10700K	Raspberry-pi 3B
sample	5.4 ms (185 fps)	104 ms (9.6 fps)
fast_run	3.1 ms (322 fps)	35 ms (28.5 fps)

You can execute this detection even on devices with limited computing resources.

Working Sample

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Test 1

Test 2

Multiple scan sample

Config

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To make this program more flexible, some configs exists.

For specific values, see config.

Image process

• IMAGE_PROCESS : Conduct image preprocess or not. (Slightly unstable)
• GAMMA : Gamma correlation parameter.
• BLUR_KERNEL : Unsharp masking parameter.
• UNSHARP_K : Unsharp masking parameter.

Barcode scan

• NUM_MAX_BARCODE : Max number of barcodes to scan.
• BARCODE_LENGTH : Number of black lines in barcode.
• SKIP_LENGTH : Number of line to skip in source image.
• FILL_WINDOW_SIZE : Window size to fill scan result.
• MIN_BARCODE_SIZE : Min barcode size to recognize.

Utils

• OUTPUT : Output images save dir.
• VISUALIZE : Show result image window or not.

What is the Pharmacode ?

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Pharmacode, also known as Pharmaceutical Binary Code, is a barcode standard, used in the pharmaceutical industry as a packing control system. Wikipedia

Components of Pharmacode

Decoding a pharmacode is very simple.

Pharmacode is a binary code, so that this has only two type of black bar (wide & narrow).

Each bar has position like above image. If position i is narrow just add $2^i$. If it's wide then add $2^{(i+1)}$.

For example : position 5 is wide bar -> add $2^6=64$.

This means that to read these code from the image by program, we only need to obtain something like a frequency component of binarized image.

For more detail. About Laetus/Pharmacodes - Computalabel

Sample

Some samples in barcodes.

$755 = 2^0 + 2^1 + 2^3 + 2^3 + 2^5 + 2^6 + 2^7 + 2^8 + 2^8$

Online pharmacode generator

Publication

For more detail. Please check these...

Qiita

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