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Code Readers / OCR

Code Readers can read 2D codes or bar codes and are available in installed or hand-held models.

Introduction Features
Principles Classifications
Engineering Data Further Information
Explanation of Terms Troubleshooting

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2 Dimensional Code Reader

Data Matrix ECC200

The relationship between symbol size (number of cells) and the amount of information is shown on the right. The following sample shows a 12 × 12 symbol size.

Symbol sizeMax. amount of information that can be expressed *1
NumbersAlphanumeric
characters
Alphanumeric
symbols
JIS8
characters
Chinese characters
(Shift JIS)
10×106331-----
12×12106531
14×141610963
16×16241614105
18×18362522168
20×204431282010
22×226043382814
24×247252463417
26×268864574221
32×3212491816030
36×361721271138442
40×4022816915011256
44×4428821419014271
48×4834825923017286
52×52408304270202101
64×64560418372278139
8×18106531
8×3220131284
12×26322220147
12×364431282010
16×366446413015
16×489872644723

QR Code Model 2

The relationship between symbol size (number of cells) and the amount of information is shown on the right. The following sample shows a 21 × 21 symbol size.

Symbol size
(Version) *2
Error
correction
level
Max. amount of information that can be expressed *1
NumbersAlphanumeric characters
(capital only)
JIS8
characters
Chinese characters
(Shift JIS)
21×21
(Version 1)
L (7%)41251710
M (15%)3420148
Q (25%)2716117
H (30%)171074
25×25
(Version 2)
L (7%)77473220
M (15%)63382616
Q (25%)48292012
H (30%)3420148
29×29
(Version 3)
L (7%)127775332
M (15%)101614226
Q (25%)77473220
H (30%)58352415
33×33
(Version 4)
L (7%)1871147848
M (15%)149906238
Q (25%)111674628
H (30%)82503421
37×37
(Version 5)
L (7%)25515410665
M (15%)2021228452
Q (25%)144876037
H (30%)106644427
41×41
(Version 6)
L (7%)32219513482
M (15%)25515410665
Q (25%)1781087445
H (30%)139845836
45×45
(Version 7)
L (7%)37022415495
M (15%)29317812275
Q (25%)2071258653
H (30%)154936439
49×49
(Version 8)
L (7%)461279192118
M (15%)36522115293
Q (25%)25915710866
H (30%)2021228452
53×53
Version 9)
L (7%)552335230141
M (15%)432262180111
Q (25%)31218913080
H (30%)2351439560
57×57
(Version 10)
L (7%)652395271167
M (15%)513311213131
Q (25%)36422115193
H (30%)28817411974

Source 2 Dimensional Code Symbol - QR Code Specifications JISX0510

*1.Regarding Max. Amount of Information
Even the same two dimensional could have different data amount depending upon their symbol size.
In other words, if the amount of data increases, the the symbol size must also increase. Also, in terms of the information handled by the code, the maximum allowable amount of information could depend on the used characters font. The maximum number of characters for the same sized symbol changes in QR code and Data Matrix in such orders as "number only">"number and alphanumeric characters">"Chinese characters".

*2.Regarding Version (QR Code)
The number representing the symbol size is "version" in QR Code . Version one is minimum and defined by number of cells in one side of square 21 × 21, and as the number of cells increase the version number also increases.