For each image used as a CAPTCHA or test image, with a text alternative, does this alternative make it possible to identify the nature and function of the image?

Referência WCAG

Testes

1. 1.4.1

   For each image (<img> tag) used as CAPTCHA or as test image, having a text alternative, is this alternative relevant?

   If present, the value of the alt attribute is relevant.
   If present, the value of the title attribute is relevant.
   If present, the value of the WAI-ARIA aria-label attribute is relevant.
   If present, the passage of text associated via the aria-labelledby WAI-ARIA attribute is relevant.
2. 1.4.2

   For each image map area (<area> tag) used as a CAPTCHA or as a test image, having a text alternative, is this alternative relevant?

   If present, the value of the alt attribute is relevant.
   If present, the value of the title attribute is relevant.
   If present, the value of the WAI-ARIA aria-label attribute is relevant.
   If present, the passage of text linked by the WAI-ARIA aria-labelledby attribute is relevant.
3. 1.4.3

   For each button of image type (<input> tag with the type="image" attribute) used as a CAPTCHA or as a test image, having a text alternative, is this alternative relevant?

   If present, the value of the alt attribute is relevant.
   If present, the value of the title attribute is relevant.
   If present, the value of the WAI-ARIA aria-label attribute is relevant.
   If present, the passage of text associated via the aria-labelledby WAI-ARIA attribute is relevant.
4. 1.4.4

   For each object image (<object> tag with the type="image/..." attribute) used as a CAPTCHA or as a test image, having a text alternative or an alternative content, is this alternative relevant?

   If present, the value of the title attribute is relevant.
   If present, the value of the WAI-ARIA aria-label attribute is relevant.
   If present, the passage of text associated via the aria-labelledby WAI-ARIA attribute is relevant.
   If present, the alternative content is relevant.
5. 1.4.5

   For each embedded image (<embed> tag with the type="image/..." attribute) used as a CAPTCHA or as a test image, having a text alternative or an alternative content, is this alternative relevant?

   If present, the value of the title attribute is relevant.
   If present, the value of the WAI-ARIA aria-label attribute is relevant.
   If present, the passage of text associated via the aria-labelledby WAI-ARIA attribute is relevant.
   If present, the alternative content is relevant.
6. 1.4.6

   For each vector image (<svg> tag) used as CAPTCHA or as test image, having a text alternative, is this alternative relevant?

   If present, the value of the title attribute is relevant.
   If present, the value of the WAI-ARIA aria-label attribute is relevant.
   If present, the passage of text associated via the aria-labelledby WAI-ARIA attribute is relevant.
7. 1.4.7

   For each bitmap image (<canvas> tag) used as a CAPTCHA or as a test image, having a text alternative or an alternative content, is this alternative relevant?

   If present, the value of the title attribute is relevant.
   If present, the value of the WAI-ARIA aria-label attribute is relevant.
   If present, the passage of text associated via the aria-labelledby WAI-ARIA attribute is relevant.
   If present, the alternative content is relevant.

Técnicas WCAG

• G100
• G143