According to the known mask, image can be separated into target region and source region.

该方法根据已知的蒙板图像，将图像分为目标区域和源区域。

youdao

Grass is the main vegetation of the source region, accounting for 79% of the whole region.

草地是江河源区主要覆盖植被，江河源区草地面积占土地面积的79%。

youdao

They then linked each sample with its likely source region and calculated the rate of dust deposition over time.

之后研究人员通过沙尘样本找寻到其对应来源地，并计算这些沙尘随时间积聚的速率。

youdao

The vast reddish desert that covers much of Somalia's central Mudug region has always been a source of wealth, as well as calamity, for thousands of pastoral families.

VOA: standard.2009.10.06

It's this - its cells in this region here, this inner cell mass that that's the source of embryonic stem cells, cells from inner cell mass here.

就是这个,在这片区域的胚胎细胞,即内细胞群,而胚胎干细胞的来源所在,就是源自这里的内细胞群

耶鲁公开课 - 生物医学工程探索课程节选

They are working with the Not For Sale Campaign to source from that region specifically to benefit the producers and communities, bringing the material to a Cambodian manufacturer also committed to a fully transparent supply chain.

FORBES: Wisdom Of A CSR Pioneer

Interestingly, Lithuania's nuclear power plant in Ignalina (4) provides a major source of electricity for the region.

CENTERFORSECURITYPOLICY: Center For Security Policy

Although Cameroon's security forces have stepped up security in the region, a source told French radio that the government in Yaounde had been given no advance warning of the Nigerian campaign.

BBC: Nigeria army's offensive to continue 'as long as it takes'