Computer-implemented method, apparatus, system and computer program for controlling a sightedness impairment of a subject

An apparatus for controlling a sightedness impairment of a subject comprising a memory;

• and at least one processor coupled to the memory and configured to:
• receive an image to display to the subject,
• determine a spatial frequency power spectrum of the received image,
• determine a slope of the spatial frequency power spectrum of the received image by generating a radially-averaged amplitude spectrum and compute, on log amplitude versus log spatial frequency, a linear-regression slope,
• generate an intermediate image by modifying a slope of the spatial frequency power spectrum of the received image,
• generate a modified image based on the intermediate image, and
• command a display to the subject of the modified image,
• wherein for generating the intermediate image the apparatus is also configured to:
• compare the slope of the spatial frequency power spectrum with a threshold,
• when the slope is above the threshold the apparatus is also configured to decrease the slope, and/or
• when the slope is below the threshold the apparatus is also configured to increase the slope.

Eyewear comprising an apparatus for controlling a sightedness impairment of a subject, a camera and a screen, the apparatus comprising a memory;

• and at least one processor coupled to the memory and configured to:
• receive an image to display to the subject,
• determine a spatial frequency power spectrum of the received image,
• determine a slope of the spatial frequency power spectrum of the received image by generating a radially-averaged amplitude spectrum and compute, on log amplitude versus log spatial frequency, a linear-regression slope,
• generate an intermediate image by modifying a slope of the spatial frequency power spectrum of the received image,
• generate a modified image based on the intermediate image, and
• command a display to the subject of the modified image,
• wherein for generating the intermediate image the apparatus is also configured to:
• compare the slope of the spatial frequency power spectrum with a threshold,
• when the slope is above the threshold the apparatus is also configured to decrease the slope, and/or
• when the slope is below the threshold the apparatus is also configured to increase the slope,
• the camera being configured to receive the image to display to the subject and the screen being configured to display the modified image.

A non-transitory computer-readable storage medium storing instructions that, when executed by one or more processors of a calculation module, cause the calculation module to perform steps of:

• receiving an image to display to the subject,
• determining a spatial frequency power spectrum of the received image,
• determining a slope of the spatial frequency power spectrum of the received image by generating a radially-averaged amplitude spectrum and computing, on log amplitude versus log spatial frequency, a linear-regression slope,
• generating an intermediate image by modifying a slope of the spatial frequency,
• generating a modified image based on the intermediate image, and
• commanding a display to the subject of the modified image,
• wherein the step of generating the intermediate image comprises:
• a step of comparing the slope of the spatial frequency power spectrum with a threshold,
• when the slope is above the threshold a step of decreasing the slope, and/or
• when the slope is below the threshold a step of increasing the slope.