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RAWEBA

1.4 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?

WCAG references
  • 1.1.1 Non-text Content (A)
Techniques
  • G100
  • G143

Official methodology to test criterion 1.4

Test 1 (1.4.1)

  1. Find in the document the images that are implemented by means of an <img> element with a text alternative and used as a CAPTCHA or as a test image.
  2. For each image, check that the text alternative is relevant.
  3. If this is the case for each image, the test is validated.

Test 2 (1.4.2)

  1. Find in the document the <area> elements with a text alternative and used as a CAPTCHA or as a test image.
  2. For each <area> element, check that the alternative text is relevant.
  3. If this is the case for each image, the test is validated.

Test 3 (1.4.3)

  1. Find in the document the <input> elements with the type="image" attribute and a text alternative, and used as a CAPTCHA or as a test image.
  2. For each <input> element with the type="image" attribute, check that the text alternative is relevant.
  3. If this is the case for each image, the test is validated.

Test 4 (1.4.4)

  1. Find in the document the <object> elements with the type="image/..." attribute and a text alternative, and used as a CAPTCHA or as a test image.
  2. For each <object> element with the type="image/..." attribute, check that the text alternative is relevant.
  3. If this is the case for each image, the test is validated.

Test 5 (1.4.5)

  1. Find in the document the <embed> elements with the type="image/..." attribute and a text alternative, and used as a CAPTCHA or as a test image.
  2. For each <embed> element with the type="image/..." attribute, check that the text alternative is relevant.
  3. If this is the case for each image, the test is validated.

Test 6 (1.4.6)

  1. Find in the document the <svg> elements with a text alternative and used as a CAPTCHA or as a test image.
  2. For each <svg> element, check that the alternative text is relevant.
  3. If this is the case for each image, the test is validated.

Test 7 (1.4.7)

  1. Find in the document the <canvas> elements with a text alternative and used as a CAPTCHA or as a test image.
  2. For each <canvas> element, check that the alternative text is relevant.
  3. If this is the case for each image, the test is validated.