The noise and low contrast of the digitized Xrayimage made it difficult to recognize defect.
数字化的X射线图像存在噪声且对比度差，给缺陷识别带来一定难度。
2
X-ray examination of a recently discovered painting—judged by some authorities to be a self-portrait by Vincent van Gogh—revealed an under image of a woman's face.
对最近发现的一幅画作被一些权威人士判定为文森特·凡高的自画像，对其进行的 X 光检查揭示了一个女人脸部的底层图像。
3
The X-rayimage shows an expanding shell of hot gas produced by the explosion.