A novel image preprocessing scheme was proposed.

提出了一种新颖的图像预处理方案。

It provides a pipeline framework for preprocessing and validation of documents.

为预处理和验证文档提供了管道框架(pipeline framework)。

These files might require preprocessing to put them into an appropriate format.

这些文件可能需要进行预处理，以便将它们转换为适当的格式。

Signing messages always involves preprocessing to convert the XML into a canonical form.

签名消息总是包含预处理，将XML转换成标准格式。

SAX does very little preprocessing, so the programmer has to manage many low-level aspects.

SAX 几乎不做预处理，因而，程序员不得不管理很多低级别问题。