Method to Evaluate Design Aesthetics (measure)

[sergiomrebelo]

This issue focuses on the development of design aesthetics measures to evaluate the compliance of output designs with the expected aesthetic standards.

The measures will be related to both visual and typography features of the outputs, including text and images. It is acknowledged that output may not fulfil all features simultaneously. The development of these features will include the creation of an interface to select the desired features and their respective weights. This is considered a core part of the project and aligns with all user stories.

ToDo List

• [x] Justification: Estimate whether the text is justified in the poster's space. Inspired by 19th-century posters, the white space on the poster should not be excessive. This metric is very similar to legibly and have two modes: JUSTIFY and ATTEMPT_JUSTIFY.
• [x] Alignment: Estimate if the horizontal alignment of text boxes follows a regular pattern. See Harrington et al. (2004).
• [x] Regularity: Estimate if the vertical alignment of text boxes follows a regular pattern See Harrington et al. (2004).
• [x] Visual Balance: Estimate the visual balance (centred or left-right) of the composition. See Harrington et al. (2004) and Lopes et al. (2023).
• [x] White Space Fraction: Check if the white space is in accordance with a predefined value. Traditionally, white space (including margins) should total half of the page area. See Harrington et al. (2004).
• [x]  Typeface Paring: Check if the typeface used on the poster pairs well. It will use measures such as x-size and type of typeface. This may require developing a method to include this information in the system (see issue #45). See Bringhurst (1992) and Lupton (2004)
• [x] ~Colour Accessibility: Check if the colour contrast and luminosity are sufficient to enable the message to be read on a poster.~
• [x] Develop module evaluation tests for each metric using jest.

[sergiomrebelo]

We remove Colour Accessibility metric, making a restriction on the generation of colour schemes. User can define the minimum aceptable constraint value and the amount of attempts in the evo-poster.config.js file

[sergiomrebelo]

The Typeface Pairing measure has been developed with a focus solely on typography classification. It ensures that two different typefaces are not combined within the same line. Therefore, there's no need for the measure to consider combinations involving ascenders, descenders, or x-height measures.

[sergiomrebelo]

The Balance measure has been developed, taking into consideration multiple balance centres.

[sergiomrebelo]

The aesthetic measures have been successfully developed, and we have created the @evoposter/evaluator module, which includes a compiled version for ease of use.