Sentence examples for extraction is difficult from inspiring English sources

Even if algorithms extract accurate bifurcation points, their extraction is difficult in low-quality and unhealthy images, and thus, they are not repeatable and not well distributed for a robust and accurate registration [20].

Since the project requires data to be extracted from PDF files that do not have a standard format, automatic data extraction is difficult, and manual data extraction is tedious.

AP: We have huge reserves of heavy oils in this continent, but their extraction is difficult.

Such feature extraction is difficult to locate for the complex moving objects with multiple states.

Although the global variation component may be included in the Pi2-range variation at auroral latitudes, its extraction is difficult in the presence of auroras.

The prediction continues even after a detection failure, so it is possible to pick up the human region again after it passes through an area where extraction is difficult.

The tooth extractions were difficult in every case because the roots were divergent and usually curved distally.

This chapter deals with five case studies that show the importance of pinch analysis in a very wide range of situations with practical examples of its implementation, particularly in the tricky areas such as stream data extraction that is difficult to systematize.

The evaluation of motion pattern extraction approaches is difficult and time consuming for a human operator.

Because of the acoustic-phonetic information loss in both noise corruption and feature extraction, it is difficult to perfectly recover clean features from noisy features by using feature compensation algorithms.

However, LCM remains tedious, especially when coupled with procedures for high quality RNA extraction, and is difficult to set up for routine use in clinical laboratories.