Guidelines for capturing eye images

Sub-headings

General Guidelines
Resolution
Left and Right eye identification
Correct Image Capture

General Guidelines

The program uses two images in order to function. The two images should consist,

A clear image of the "Left eye" of the subject (Fig. 1a)
A clear image of the "Right eye" of the subject (Fig. 1b)

(a) (b)
Figure 1

Resolution

Resolution on your professional camera should be at least greater than 5MP. The images can be either 4:3 aspect ratio or 16:9 aspect ratio. (Fig. 2)

Camera resolution	> 5 Mega-Pixels
Image Dimensions	> 25601920 (at 4:3 aspect ratio) ~OR~ > 30721728 (at 16:9 aspect ratio)

Figure 2

Left and Right eye identification

The captured left eye should have the tear duct on the left and lateral canthus on the right. The captured right eye should have the tear duct on the right and lateral canthus on the left. (Fig. 3)

Figure 3

If these conditions are not met, the camera you are using is flipping the images that are taken from it. Please refer the camera settings manual in order to flip the captured image.

Correct Image Capture

It is MANDATORY to use the highest quality image in order to get accurate results with the Eye Test KFR 2020 Software. Therefore, cell phone cameras are not compatible with the Eye Test KFR 2020 Software. The resolution on cell phones is modified by additional internal software integrated into the cell phone. A professional camera does not modify the image. It produces the exact required resolution without the use of any additional software.

The EYE TEST KFR 2020 software considers only the iris. Therefore, when capturing eye images, care must be taken to ensure the accuracy of the results. Below are some ideal iris images. Study the following figures in order to take a good quality image of each eye, which can be used in the program. (Fig. 4)

Figure 4

Following are some images taken incorrectly that will affect the results significantly. Therefore, please ensure that the following mistakes are avoided. (Fig. 5)

Figure 5

Please note the following areas of concern:

Good lighting: The lighting can be natural light or the light that comes from a light source connected to the camera unit. (Fig. 6)

Figure 6

Proper Angle: When taking the iris image please ensure that the gaze of the client is straight. If the image is captured at an angle the software will stretch the image creating skewed results. (Fig.7)

Figure 7

Image sharpness/clarity: The iris must be clear and in focus to get an accurate reading. When taking images keep the camera and the subject as still as possible in order to prevent blurry images. Use a chin rest if necessary, to stabilize the head. (Fig. 8)

Figure 8

Visibility: The entire iris should be visible, not obscured with skin on top or bottom. If the image is obscured in the kidney reaction field there will not be an accurate reading. (Fig. 9)

Figure 9

Size: The iris must be the proper size. If the iris is too small there will be an inaccurate result. If the picture is taken with the eye filling the frame then the results should be accurate. (Fig. 10)

Figure 10