**3. Experiments**

#### *3.1. Experiment* №*1. 16:00, Action at 67–70 lux*

The program on the smartphone was used to measure the suites, as the study was performed to link to the most common video cameras. Figures 2–29 shows the work of the considered methods in comparison with the original image. Images are grouped according to lighting conditions. Thus, the first experiment (lighting 70 lux) is presented in Figure 2 (original input image and the result of processing by the Sobel method); Figure 3 (normalized Sobel gradient on the X axis and gradient on the Y axis); Figure 4 (Canny and Pruitt method); Figure 5 (Prewitt's operator on the X axis and (Prewitt's operator on the Y axis).

**Figure 3.** (**a**) Normalized Sobel gradient of the image along the *x*-axis; (**b**) normalized Sobel gradient of the image on the *y*-axis at 70 lux.

**Figure 4.** (**a**) Canny's operator; (**b**) Prewitt's operator at 70 lux.

**Figure 5.** (**a**) Prewitt's operator X; (**b**) Prewitt's operator Y at 70 lux.

**Figure 7.** (**a**) Sobel operator on the *x*-axis; (**b**) Sobel operator on the *y*-axis at 50 lux.

**Figure 8.** (**a**) Canny operator; (**b**) Prewitt's operator on the *y*-axis at 50 lux.

**Figure 9.** (**a**) Prewitt's operator on the *x*-axis; (**b**) Prewitt's operator on the *y*-axis at 50 lux.

**Figure 10.** (**a**) Input image; (**b**) Sobel operator at 100 lux.

**Figure 11.** (**a**) Sobel operator on the *x*-axis; (**b**) Sobel operator on the *y*-axis at 100 lux.

**Figure 12.** (**a**) Canny operator; (**b**) Prewitt's operator on the *y*-axis at 100 lux.

**Figure 13.** (**a**) Prewitt's operator on the *x*-axis; (**b**) Prewitt's operator on the *y*-axis at 100 lux.

**Figure 14.** (**a**) Input image; (**b**) Sobel operator at 260 lux.

**Figure 15.** (**a**) Sobel operator on the *x*-axis; (**b**) Sobel operator on the *y*-axis at 260 lux.

**Figure 17.** (**a**) Prewitt's operator X; (**b**) Prewitt's operator Y at 260 lux.

**Figure 18.** (**a**) Input image; (**b**) Sobel operator at 2300 lux.

**Figure 19.** (**a**) Sobel operator on the *x*-axis; (**b**) Sobel operator on the *y*-axis at 2300 lux.

**Figure 20.** (**a**) Canny operator; (**b**) Prewitt's operator at 2300 lux.

**Figure 21.** (**a**) Prewitt's operator X; (**b**) Prewitt's operator Y at 2300 lux.

**Figure 22.** (**a**) input image; (**b**) Sobel operator at 2300 lux+ man shadow.

**Figure 23.** (**a**) Sobel operator on the *x*-axis; (**b**) Sobel operator on the *y*-axis at 2300 lux+ man shadow.

**Figure 24.** (**a**) Canny operator; (**b**) Prewitt's operator at 2300 lux+ man shadow.

**Figure 25.** (**a**) Prewitt's operator X; (**b**) Prewitt's operator y at 2300 lux+ man shadow.

**Figure 27.** (**a**) Sobel operator on the *x*-axis; (**b**) Sobel operator on the *y*-axis at 2350 lux.

**Figure 28.** (**a**) Canny operator; (**b**) Prewitt's operator at 2350 lux.

**Figure 29.** (**a**) Prewitt's operator X; (**b**) Prewitt's operator Y at 2350 lux.

#### *3.2. Experiment* №*2. 16:30, Action at 50 Lux*

The second experiment (lighting 50 lux) is presented in Figure 6 (original input image and the result of processing by the Sobel method); Figure 7 (normalized Sobel gradient on the X-axis and gradient on the Y-axis); Figure 8 (Canny's and Prewitt's method); Figure 9 (Prewitt's operator on the X-axis and (Prewitt's operator on the Y-axis).

#### *3.3. Experiment* №*3. 16:50, Action at 100 Lux (Includes E-Electric Lighting)*

The third experiment (lighting 100 lux) is presented in Figure 10 (original input image and the result of processing by the Sobel method); Figure 11 (normalized Sobel gradient on the X-axis and gradient on the Y-axis); Figure 12 (Canny's and Prewitt's method); Figure 13 (Prewitt's operator on the X-axis and (Prewitt's operator on the Y-axis).

#### *3.4. Experiment* №*3. 13:00, Action at 260 Lux*

The forth experiment (lighting 260 lux) is presented in Figure 14 (original input image and the result of processing by the Sobel method); Figure 15 (normalized Sobel gradient on the X-axis and gradient on the Y-axis); Figure 16 (Canny's and Prewitt's method); Figure 17 (Prewitt's operator on the X-axis and (Prewitt's operator on the Y-axis).

#### *3.5. Experiment* №*3. 13:30, Action at 2300 Lux*

The fifth experiment (lighting 2300 lux) is presented in Figure 18 (original input image and the result of processing by the Sobel method); Figure 19 (normalized Sobel gradient on the X-axis and gradient on the Y-axis); Figure 20 (Canny's and Prewitt's method); Figure 21 (Prewitt's operator on the X-axis and (Prewitt's operator on the Y-axis).

#### *3.6. Experiment* №*3. 13:30, Action at 2300 Lux + Man Shadow*

The sixth experiment (lighting 2300 lux) is presented in Figure 22 (original input image and the result of processing by the Sobel method); Figure 23 (normalized Sobel gradient on the X-axis and gradient on the Y-axis); Figure 24 (Canny's and Prewitt's method); Figure 25 (Prewitt's operator on the X-axis and (Prewitt's operator on the Y-axis).

#### *3.7. Experiment* №*3. 13:30, Action at 2350 Lux, Cam Front to Light*

The seventh experiment (lighting 2350 lux) is presented in Figure 26 (original input image and the result of processing by the Sobel method); Figure 27 (normalized Sobel gradient on the X-axis and gradient on the Y-axis); Figure 28 (Canny's and Prewitt's method); Figure 29 (Prewitt's operator on the X-axis and (Prewitt's operator on the Y-axis).
