Measures for image testing

An image testing system for comparing human perceivable differences between two images, the system comprising:

• a processor and a memory storing instructions causing the processor to:
• apply, using a display model module, at least one display property to a test image to generate a display modified test image;
• apply, using the display model module, the at least one display property to a reference image to generate a display modified reference image;
• apply, using an eye model module, a human eye model to the display modified test image to generate an eye modified test image;
• apply, using the eye model module, a human eye model to the display modified reference image to generate an eye modified reference image;
• and
• compare, using a comparison module, the eye modified test image with the eye modified reference image to determine human perceivable differences between the test image and the reference image,
• wherein the display module is configured to:
• generate a subpixel matrix for a display based on a subpixel layout;
• apply the subpixel matrix to the test image;
• convert the test image to a spectral domain from 3-color space;
• and
• apply a spectral emission to the test image to generate the display modified test image.

A method for comparing images for image testing comprising:

• applying a display model to an input image to generate a display modified input image, wherein the applying the display model comprises:
• generating a subpixel matrix for a display based on a subpixel layout;
• applying the subpixel matrix to an input image;
• converting the input image to a spectral domain from 3-color space;
• and
• applying a spectral emission to the input image to generate the display modified input image;
• applying an optical transfer function to the display modified input image to generate a retinal modified input image;
• and
• comparing the retinal modified input image with a reference image to determine human perceivable differences between the input image and the reference image.