NY/T 2334-2013Determination of head rice yield, grain shape, chalky rice percentage, chalkness degree and translucency - An image analysis method (English PDF)
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Issued by
Ministry of Agriculture of the PRC
Level / Type
National · Recommended
Issue date
May 20, 2013
Implementation date
August 1, 2013
Scope
NY/T 2334-2013 (Determination of head rice yield, grain shape, chalky rice percentage, chalkness degree and translucency - An image analysis method) is available as an English-translated PDF.
NY/T 2334-2013 is the Chinese standard "Determination of head rice yield, grain shape, chalky rice percentage, chalkness degree and translucency - An image analysis method".
Its scope clause reads: This standard specifies the image analysis method for head rice yield, grain shape, chalky rice percentage, chalkiness degree and translucency.
This standard is applicable to the determination of head rice yield, grain shape, chalky rice percentage, chalkiness degree and translucency. Its clauses include terms and definitions; principle; instruments and equipment; specimen preparation.
It was issued by the Ministry of Agriculture of the PRC on 2013-05-20 and took effect on 2013-08-01.
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Document preview — NY/T 2334-2013
National Standard of the People's Republic of China
- ICS
- 67.050
- Classification
- X 04
Issued by: Ministry of Agriculture of the PRC
Contents
- Foreword...3
- 1 Scope...4
- 2 Normative references...4
- 3 Terms and definitions...4
- 4 Principle...6
- 5 Instruments and equipment...6
- 6 Specimen preparation...6
- 7 Testing...7
- Appendix A (Informative) Image example of rice specimen test result...9
1 Scope
This standard specifies the image analysis method for head rice yield, grain shape, chalky rice percentage, chalkiness degree and translucency.
This standard is applicable to the determination of head rice yield, grain shape, chalky rice percentage, chalkiness degree and translucency.
2 Normative references
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is applicable to this standard.
GB 1350 Paddy
GB 1354 Rice
GB/T 17891 High quality paddy
GB/T 21719 Determination of head rice yield of paddy
NY/T 593 Cooking rice variety quality
3 Terms and definitions
The terms and definitions defined in GB 1350, GB/T 17891, NY/T 593, as well as the following terms and definitions, apply to this document.
3.1
Milled rice recovery
The mass fraction of milled rice in a net rice specimen under specified processing accuracy.
projection area of the rice grain.
3.8
Chalkiness degree
The percentage of the total chalky area of chalky rice to the total area of head rice grains in the specimen.
Note. Rewrite GB/T 17891-1999, definition 3.6.
3.9
Translucency
The degree of transparency of whole head rice grains, which is expressed by the relative transmittance of whole head rice.
Note. Rewrite NY/T 593-2002, definition 3.12.
4 Principle
Using imaging technology and long target automatic segmentation technology, combined with manual guidance to identify whole rice and chalkiness degree, AND determine the head rice yield, grain shape, chalky rice percentage, chalkiness degree and translucency in one time.
5 Instruments and equipment
5.1 Experimental rice husking machine.
5.2 Experimental rice milling machine.
5.3 Sample divider.
5.4 Electronic balance. Sensitivity ± 0.01 g.
5.5 Grain screening machine.
5.6 Image scanner.
5.7 Computer with rice appearance quality analysis software.
6 Specimen preparation
Perform according to the provisions of GB/T 21719.
7.3 Chalkiness detection
7.3.1 Analysis steps
The operation method is the same as 7.1.1.Automatically and randomly select no less than 100 complete head rice specimen images from the scanned image; manually remove the rice grain images that are mistakenly judged as chalky because the specimen skin or embryo is left; finally use the rice appearance quality analysis software to calculate the chalky rice percentage and chalkiness degree (see A.2 for images). Repeat the measurement of parallel specimens.
7.3.2 Precision
7.3.2.1 Chalky rice percentage
When the chalky rice percentage of the specimen is < 50%, the absolute difference between the two independent test results obtained under repeatability conditions is less than 5%. When the chalky rice percentage of the sample is >= 50%, the absolute difference between the two independent test results obtained under repeatability conditions is less than 10%.
7.3.2.2 Chalkiness degree
When the chalkiness degree of the specimen is < 10%, the absolute difference between the two independent test results obtained under repeatability conditions is less than
1.0%. When the chalkiness degree of the specimen is >= 10%, the absolute difference between the two independent test results obtained under repeatability conditions is less than 2.0%.
7.4 Transparency detection
7.4.1 Analysis steps
The operation method is the same as 7.1.1.The transparency degree of the head rice specimen is automatically calculated using the rice appearance quality analysis software.
7.4.2 Precision
The absolute difference between the two independent test results, which are obtained under repeatability conditions, is less than 1.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 9 pages — is available in the English PDF.
Referenced standards
Normative references
- GB 1350Paddy
- GB/T 17891High quality paddy
- GB/T 21719Inspection of grain and oils - Determination of head rice yield from paddy
GB 1354 · NY/T 593
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NY/T 2334-2013
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