Labelling image for sentiment analysis represents the attachment of sentiment or emotion tags to images aimed at drawing conclusions on visual data.
Here’s how it can be done effectively:
Define Sentiment Categories: In case of your image dataset, get the sentiment or emotion categories you are interested in. The pool of emotions can for example include: positive, negative, neutral, happy, sad, angry, surprised, etc. Where each category is defined by certain guidelines for annotators.
Annotate Emotions or Sentiments: If you are using the annotation tools then, label images as any of the positive or negative emotions or sentiment. Markers can be placed around regions of interest (e.g., faces) and labels can be assigned to the regions to define whether the sentiment is positive, negative or neutral.
Consider Context: Remembering the image context when assigning an emotion label is suffice. Likewise, a person looking happy smiling in a group picture might mean that he is just happy, but the general picture of the event (e.g., a funeral) provide interesting aspects.
Annotate Objects and Scenes: Besides facial expressions, picturing other objects or scenes in the photograph that show the necessary expression is also advisable. Consider another thing, like a sunny beach where the positive feeling is likely to be observed, or a dark alleyway where negative feelings are to be expected.
Account for Ambiguity: Understand that sentiment annotation may include subjectivity and inaccuracy. Write up the rules for using them in the instances of disagreement among annotators. At the same time, acknowledge the annotators’ power to use their judgment and guarantee the consistency.
Use Multi-Modal Annotations: Make image annotations in combination with some text annotations that include indicating the sentiment mood (e.g., caption, tags) to provide a comprehensive context for sentiment analysis. This integrative approach makes sentiment more precise and diverse, thus also brightens the image.
Validate Annotations: Check the rightness of annotations by using human judgments and performing qualified tasks for verifying it. It might be conducted by examining a knot of inspected images either manually or by applying validation routines that look for errors.
Iterative Improvement: Regard annotation services as iterative process and enrich your guidelines on annotating on a periodic basis with the help of observations and ideas that are generated during the analysis. Keep the annotated data under review to monitor the places for making corrections and update the guidelines wherever necessary.
Account for Cultural Differences: Take into account that the sentiment is affected mostly by the cultural peculiarities and might not convey the similar meaning in the space. Analyse the cultural context of the audience you are targeting, and make sure that the sentiment categories and the schemes of annotation are adequate and relevant.
Ensure Privacy and Ethical Considerations: In case you do the annotations, respect the privacy and ethical considerations when it comes to annotating an image, especially when it contains sensitive information or personal data. Build some person identifiers anonymity and face covering measures if necessary.
Implementing the best practices discussed above, you may successfully annotate images for sentiment analysis with the aim of converting visual information into actionable business insights that will make the product and users better.
To know more about Annotation support’s image annotation services, please contact us at https://www.annotationsupport.com/contactus.php