Method, apparatus, and computer-readable medium for assessing quality of images produced by scanning system for eye examination

A non-transitory storage medium storing computer program instructions which, when executed by a processor, cause the processor to execute a method of assessing image quality of an image produced by a scanning imaging system, the method comprising:

• acquiring image data of an image produced by the scanning imaging system;
• calculating, for each section of a plurality of sections of the image covering different regions of the image
• a respective first value of a measure of at least one of a sharpness or a contrast of at least a part of the section, the measure being dependent on noise in the at least a part of the section,
• a respective second value that provides a measure of noise in at least a part of the section, and
• a respective third value indicative of an image quality of the section by combining the respective calculated first value with the respective calculated second value,
• wherein, in the calculation of the respective third value for each of the plurality of sections of the image, the respective calculated first value and the respective calculated second value are combined in the combining such that the third values calculated for respective sections of the plurality of sections have a weaker dependency on the noise than the first values calculated for respective sections of the plurality of sections;
• and
• determining a quality score that is indicative of an image quality of the image based on a variation of the calculated third values among the sections.

An apparatus for assessing image quality of an image produced by a scanning imaging system, the apparatus comprising:

• an image acquisition module arranged to acquire image data of an image produced by the scanning imaging system;
• and
• a calculation module arranged to calculate, for each section of a plurality of sections of the image covering different regions of the image
• a respective first value of a measure of at least one of a sharpness or a contrast of at least a part of the section, the measure being dependent on noise in the at least a part of the section,
• a respective second value that provides a measure of noise in at least a part of the section, and
• a respective third value indicative of an image quality of the section by combining the respective calculated first value with the respective calculated second value,
• wherein the calculation module is arranged to
• combine the respective calculated first value and the respective calculated second value in the calculation of the respective third value for each of the plurality of sections of the image such that the third values calculated for respective sections of the plurality of sections have a weaker dependency on the noise than the first values calculated for respective sections of the plurality of sections, and
• determine a quality score that is indicative of an image quality of the image based on a variation of the calculated third values among the sections.