false detection of human hand using cacade taining using matlab without open cv library

what I want to do: I want to detect Human hand using Matlab language.

what I have been tried: I tried detect humman hand by training computer using (trainCascadeObjectDetector)function in matlab using Haar feature and Histogram of oriented graident (HOG) feature. the number of positive images were used are (1020),negative image (1055) and number of training stages are 10 for both haar and HOG.. positive images folder include only human hand, and negatives images folder include human face, human eyes, human mouth, human nose, and different backgroud images.

problems I were faced: I always get false detection, it detect face, mouth, eyes, nose, and background and over above hand in haar while in Hog detect human face, and human eyes and sometimes detect mouth over above hand .. what can I do to get rid of false detection??

windows and matlab version windows 10 and R2017 matlab >>> any help will appreciated