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Tracking the Eyes Tracking the Eyes usingusing

a Webcama WebcamPresented by: Presented by: Kwesi AckonKwesi Ackon

Supervisor: Mr. J. ConnanSupervisor: Mr. J. Connan

RecapRecap Track the eyesTrack the eyes

Move cursor on the screen using the eyesMove cursor on the screen using the eyes

ChangesChanges No edge detectionNo edge detection

Move from RGB colour space to HSV Move from RGB colour space to HSV colour spacecolour space

White backgroundWhite background

HSV (Hue, Saturation, Value) SpaceHSV (Hue, Saturation, Value) Space

--H (hue): Ranges from 0-360. Hue represents theH (hue): Ranges from 0-360. Hue represents the

colour type (e.g. blue, red etc).colour type (e.g. blue, red etc).

--S (saturation): Ranges from 0-100. It represents the purity of the S (saturation): Ranges from 0-100. It represents the purity of the colour: the higher saturation value is, the clearer the colour is. If colour: the higher saturation value is, the clearer the colour is. If saturation is low, the colour looks closer to gray.saturation is low, the colour looks closer to gray.

--V (value): This is the brightness of the colour, and it ranges from V (value): This is the brightness of the colour, and it ranges from 0-100.0-100.

HSV colour space represented as a cylinderHSV colour space represented as a cylinder

Red pixelRGB space: 255 0 0HSV space: 0˚ 100% 100%

Conversion from RGB to HSVConversion from RGB to HSV

ProgressProgress Face detection implementationFace detection implementation

Original Original image Detected skin pixelsDetected skin pixels0 < H < 50, 23 < S < 68 0 < H < 50, 23 < S < 68

Level of accuracy 96.4%

Results for different skin typesResults for different skin types

Dark skinDark skin

Light skinLight skin

Eye detection implementationEye detection implementation

yx

y1

x1

Obtaining dimensionsof eye rectangle:y = Half height of face rectanglex = Half width of face rectangley1 = 0.10 * yx1 = 0.625 * x Width of eye rectangle = x1Height of eye rectangle= 2 * y1

Results for eye detectionResults for eye detection

Tools and LanguagesTools and Languages Dev-C++ 4.9.9.2Dev-C++ 4.9.9.2 Visual C++ 6.0Visual C++ 6.0 OpenCV 1.0.0 OpenCV 1.0.0

PlanPlan Move cursor on screen using the eyesMove cursor on screen using the eyes