CENTER TEXT ON IMAGE FULL
The next example ( Example 4) is an image of a basic structure of a periodic table that it is highlighting the Nobel gases column and is only displaying the symbol of the elements and not the full name of the elements. A caption will provide both sighted and non-sighted users this information. Users who are not familiar with this historical figure will require a text description to know who this person is. The image is a portrait of a famous historical figure, Sir. The image below ( Example 3) is an example of an image that benefits from a caption instead of alt text. The Nobel gases are He- Helium, Ne- Neon, Ar- Argon, Kr- Krypton, Xe- Xenon, Rn- Radon Periodic Table of Elements with the Nobel gases emphasized in red. The “figcaption” provides a description for a “figure” element that would be programmatically associated with the image. In HTML5, the “figcaption” element is used to provide caption for an image. NOTE: When using and elements, the alt text attribute still should be provided. Captions, therefore, may be the alternative solution to avoid compatibility issues. However, some modern programming languages and browsers may not support the full functionality of the long description. Images that are using long description: The long description has been used as alt text for images that require more than one sentence.If the caption overwhelms the user and takes up too much space, there may be other methods to provide a text alternative. Refer to the complex images section for alternatives. However, these images would benefit from a caption as long as the caption is not too long. Images that are complex: Some images that are complex may benefit from a caption.A caption will allow both sighted and non-sighted users to know what that additional information is. Images that require supporting or additional information: Some images may present symbols or signs that require additional explanation.Images that require a heading to understand what the context of the image: For example, portraits of people or pictures of geographic locations may benefit from a caption to ensure everyone is aware what the image is about.Therefore, including phrases such as “image of…”, “graph of…” causes unnecessary redundancy for users.Īs with alt text, an image requires a caption if it conveys important information. Typically, assistive technologies will announce to a user the presence of an image. Moreover, the same alt text should not be used with different images. Alt text should not provide identitical information as text within the context of the image. Listening to long alt text can be burdensome for assistive technology users. Longer alt text might also be a problem because it may provide more information to assistive technology users giving a disadvantaged to sighted users. Alt text of an image should be short and to the point. Alt text should accurately present the same content and function as is presented in the image. Nonetheless, there are tips to follow in writing good alt text: Writing great alt text takes time and practice. While sighted users can enjoy the imagery of the cute hamster, non-sighted users will need descriptive alt text to enjoy this image. The image shows a hamster sitting on a swing. The second example ( Example 2) is another image that requires alt text. An example of good alt text for this image would be: Without the alt text, a user who cannot see the image will be at a disadvantage for they will be unable to understand the image and the meaning behind the image. The image displays a turtle eating a strawberry in the grass. The example below ( Example 1) is an image that should have alt text. This will ensure that assistive technologies skip over the image and that no accessibility-testing applications signal an error if the alt text is not provided for these images. NOTE: For images that do not need alt text it is recommended that the alt text attribute is null ( Alt=””). If the image description is within the content of the page, the alt text attribute should be null ( Alt=””). Images with the text description within the content of the page do not require alt text.If a caption is present, the alt text attribute should be null ( Alt=””). Captions are text descriptions for an image that are displayed on the page, thus allowing sighted and non-sighted users information about the image. Images that have a caption do not need alt text.If a decorative image is present, the alt text attribute should be null ( Alt=””). Decorative images are considered images that are used for layout and do not present important content. Images that serve for decoration only.How do you know if an image needs alt text?Īn image requires alt text if it conveys important information.
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