Image processing and presentation techniques for enhanced proctoring sessions

A computer-implemented method for a remote diagnostic testing platform, the computer-implemented method comprising:

• receiving, by a computing system, a video feed from a user device of a user engaging in an on-demand test session;
• analyzing, by the computing system, the video feed to automatically determine that a particular step in the on-demand test session has been reached by the user;
• based on detection of the particular step, storing, by the computing system, a plurality of subsequently-received image frames of the video feed to a first buffer;
• evaluating, by the computing system, the plurality of image frames stored in the first buffer against a set of criteria, wherein the evaluation comprises evaluating motion blur, a difference between a frame of the plurality of image frames and an adjacent image frame of the plurality of image frames, and a closeness of a camera exposure level to a predetermined exposure level;
• selecting, by the computing system, a subset of the image frames stored in the first buffer based at least in part on the evaluation;
• storing, by the computing system, the selected subset of image frames to a second buffer;
• processing, by the computing system, the subset of image frames stored in the second buffer to generate a composite image;
• and
• performing, by the computing system, one or more operations using the composite image.