求翻译：目前，国外、国内的许多学者，从不同角度和不同知识层面对AB模型进行了各种类型的改进或拓展，使改进后的模型对活动轮廓的初始化和噪声不敏感，分割速度得以加快，分割效果更好。但是，这些模型各自都存在自身的不足，且智能化程度还须要提高。是什么意思？

At present, foreign and domestic many scholars from different angles and different level of knowledge on the ab model all types of improvements or expansion, improved model is not sensitive to initialization and noise of the active contour, segmentation speed can be accelerated better segmentation.

At present, many of the foreign and domestic scholars, from a different angle and different knowledge levels AB model for the various types of improvements to improve or expand, and the model after the initialization of the contour and the noise is not sensitive, split split speed, better. However,

At present, overseas, domestic many scholars, has made each kind of type improvement or the development from the different angle and the different knowledge stratification plane to the AB model, after causes the improvement the model to move the outline the initialization and the noise is insensitiv

At present, the domestic and foreign many scholars from different angles and different levels of knowledge on the AB model with various types of improvements or expand to enable initialization of an improved model for active contours and noise-sensitive, segmentation speed was accelerated, segmentat

正在翻译，请等待...