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射线检测技术的一般理论指出,细节的对比度图像可由不清晰度曲线合成给出。对丝对细节,其峰对比度与谷对比度之比仅依赖于丝直径与不清晰度之比。以丝对的峰对比度与谷对比度之比作为特征量,可以形成测定检测图像不清晰度方法。简单推论,则可以形成以单丝测定检测图像不清晰度方法。上述测定方法的意义是,为设计和使用带有高吸收物质的一个丝对(或丝)的新型线型像质计提供了依据,这种新型线型像质计可以简单地同时测定检测图像的对比度和不清晰度。
The general theory of ray detection technology states that detailed contrast images can be synthesized from unsharp curves. For wire-to-detail, the ratio of peak contrast to valley contrast depends only on the ratio of wire diameter to unsharpness. Taking the ratio of the peak contrast to the valley contrast of the wire pair as the characteristic amount, a method of determining the unsharpness of the detection image can be formed. Simple reasoning, you can form a monofilament determination of image unsharpness detection method. The significance of the above determination method is that it provides a basis for designing and using a new wire type image quality meter with a high absorbency substance. This new type of line quality meter can be used to measure the test image Contrast and unsharpness.