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mappVision帮助助手 > 机器视觉帮助 > mapp Vision > 诊断 > 常见问题 > 读码器常见问题 获取的图像中几乎无法识别代码。 |
如果在获取的图像中,由于代码和背景的灰度值几乎相同或整个图像的灰度值过于均匀而无法识别代码,这可能是由于以下原因造成的。
•可能的原因
•打印代码的材料表面。
金属或高反射表面(类似于曝光过度)会导致图像过于明亮。
•可能的解决方案
•使用偏振滤光镜。
•倾斜相机。
•使用外部光源。
•改变闪光段(例如拍摄圆形物体)。
•可能原因
•在获取的单色图像中,代码的颜色和背景的灰度值几乎相同。
•可能的解决方案
•注意互补色。
•设置正确的 FlashColor 以获得所需的对比度。
•选择正确的参数模式。
•使用参数优化。
If a code is not recognized in the acquired image because the grayscale values of the code and the background are almost the same or generally too homogeneous in the entire image, this may be due to the following reasons.
•Possible reason
•The material surface on which the code is printed.
Metallic or highly reflective surfaces (similar to overexposure) will result in an image that is far too bright.
•Possible solution
•Use a polarizing filter.
•Tilt the camera.
•Use an external light.
•Change the flash segments (e.g. for round objects).
•Possible reason
•Color of code and background have almost the same grayscale value in the monochrome acquired image.
•Possible solution
•Note the complementary colors.
•Set the correct FlashColor to obtain the required contrast.
•Select the correct ParameterMode.
•Use ParameterOptimization.