In order to control the quality of welding by image processing and pattern recognition, the clear image of the welding pool of aluminum alloy and the information of the welding pool must be obtained.
为了采用图像处理与模式识别的方法对铝合金的焊接质量进行智能控制，必须获取铝合金焊接熔池的清晰图像，然后提取焊接熔池的信息。
In the areas of pattern recognition and image processing, an image is often thinned to get its most valid digital information.
在模式识别和图象处理等领域，往往通过对图象施以细化来获得图象特征的最有效的数字化信息。
Extracting recognizable images from PDF files will benefit the development of image recognition and information processing.
从PD F文件中提取可供识别的图像，有利于图像识别和信息处理。
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