LRV Contrast Calculator
Free
1.1.2for iPhone, iPad and more
Age Rating
LRV Contrast Calculator スクリーンショット
About LRV Contrast Calculator
A good Luminance contrast can assist people with low vision in identifying important building elements such as Stairway Nosings, Doorways, Tactile Ground Surface Indicators and Signage in the built environment.
With the introduction of the ADA (Americans with Disabilities Act) and DDA (Australian Disability Discrimination Act), it is useful for Architects, Interior Designers, Disability Access Consultants and even product manufacturers to quickly calculate the required LRV contrast of adjoining materials.
Light / Luminance Reflectance Value, or LRV, is a measurement of light that is reflected from a surface. Some of the ways to find the LRV are by means of a colorimeter, spectrophotometer or directly by the manufacturer (for example, LRV noted on a fan deck provided by a paint manufacturer).
LRV / Luminance Contrast is the light reflected from one surface as compared to the light reflected from another surface. This app calculates the percentage difference required when the LRV of any two samples are know. For example, if you have the LRV of the color of the door frame and the LRV of the color of the door, you can use this calculator to determine the contrast in % based on the formulas used in either USA or Australia.
The Americans with Disability Act Accessibility Guidelines (ADAAG) recommends a 70% LRV or higher for those with impaired vision and Australian / New Zealand Standard AS/NZ 1428.4.1-2009 requires LRV contrast in a range of 30% to 60% based on the type of building elements.
With the introduction of the ADA (Americans with Disabilities Act) and DDA (Australian Disability Discrimination Act), it is useful for Architects, Interior Designers, Disability Access Consultants and even product manufacturers to quickly calculate the required LRV contrast of adjoining materials.
Light / Luminance Reflectance Value, or LRV, is a measurement of light that is reflected from a surface. Some of the ways to find the LRV are by means of a colorimeter, spectrophotometer or directly by the manufacturer (for example, LRV noted on a fan deck provided by a paint manufacturer).
LRV / Luminance Contrast is the light reflected from one surface as compared to the light reflected from another surface. This app calculates the percentage difference required when the LRV of any two samples are know. For example, if you have the LRV of the color of the door frame and the LRV of the color of the door, you can use this calculator to determine the contrast in % based on the formulas used in either USA or Australia.
The Americans with Disability Act Accessibility Guidelines (ADAAG) recommends a 70% LRV or higher for those with impaired vision and Australian / New Zealand Standard AS/NZ 1428.4.1-2009 requires LRV contrast in a range of 30% to 60% based on the type of building elements.
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最新バージョン 1.1.2 の更新情報
Last updated on 2019年08月28日
旧バージョン
Minor UI changes
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Version History
1.1.2
2019年08月28日
Minor UI changes
1.0.1
2017年03月20日
LRV Contrast Calculator FAQ
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次のリストをチェックして、LRV Contrast Calculatorの最低システム要件をご確認ください。
iPhone
Requires iOS 8.0 or later.
iPad
Requires iPadOS 8.0 or later.
iPod touch
Requires iOS 8.0 or later.
LRV Contrast Calculatorは次の言語がサポートされています。 English