AUTOMATICFETAL HEAD CIRCUMFERENCE MEASUREMENT IN 2D ULTRASOUND FETAL IMAGES USING HISTOGRAM OF ORIENTED GRADIENT

Ultrasound images are used to provide information about fetal development in the womb. The image generated by the two-dimensional ultrasound has not been able to provide complete information. Therefore, in order to get the form of fetus on ultrasound image can be clearly identified with the necessary process of image analysis that can detect the boundaries of objects ROI, so that it can differentiate between one object with another object on the ultrasound image. In this paper, we explore a new local feature extraction technique pyramid histogram of oriented gradients (PHOG) to make simple, fast and high performance. PHOG can describe the local shape of the image and its relationship between the spaces. The using of PHOG algorithm to extract image features in image recognition and retrieval and other aspects have achieved good results.