利用短波紫外激发长波紫外荧光显现深色背景客体上的血指印
|
摘要
目的许多复杂客体上的血潜指纹通常无法由简单的拍照提取方法获取。为了有效并且无损的显现提取到现场血潜指印,运用短波紫外激发长波紫外荧光的方法,对客体上的血潜指纹进行拍摄。方法收集了四种生活中常见的、具有复杂且深色背景的客体。实验中使用红紫外照相机结合短波环形紫外灯系统,在常温的环境下,运用该设备的短波紫外激发长波紫外荧光技术显现血指纹,并且将其提取指纹效果与通过普通配光方法和紫外反射摄影方法所拍摄的指纹图片效果进行对比。结果对上述方法所得到的图片效果进行比较后,短波紫外激发长波紫外方法能够更加有效的提取深色复杂背景客体上的血指纹。结论该方法成像图像清晰,反差明显、操作简单,也能够有效的显现微弱的血潜指纹。
Objective The blood latent fingerprints on many complex objects are usually not available by simple photo extraction methods. In order to effectively and non-destructively extract blood latent fingerprints from the scene, short-wave ultraviolet excitation long-wave ultraviolet fluorescence was used to capture the blood latent fingerprint on the object.Method Four objects common in life and with complex backgrounds were collected. A red-UV camera was used in the experiment in combination with a short wave annular UV lamp system. In an environment at the room temperature, the short-wave ultraviolet excitation long-wave ultraviolet fluorescence technique of the device was used to collect the blood fingerprints. Then its fingerprint extraction effect was compared with the fingerprint image taken by the ordinary light distribution method and the ultraviolet reflection photography method. Results After comparing the image effects of the methods above, the short-wave ultraviolet-excited long-wave ultraviolet method extracted the blood fingerprints on the dark complex background objects more effectively. Conclusion This method has clear imaging, obvious contrast, simple operation, and the weak blood latent fingerprint can be effectively displayed.
Objective The blood latent fingerprints on many complex objects are usually not available by simple photo extraction methods. In order to effectively and non-destructively extract blood latent fingerprints from the scene, short-wave ultraviolet excitation long-wave ultraviolet fluorescence was used to capture the blood latent fingerprint on the object.Method Four objects common in life and with complex backgrounds were collected. A red-UV camera was used in the experiment in combination with a short wave annular UV lamp system. In an environment at the room temperature, the short-wave ultraviolet excitation long-wave ultraviolet fluorescence technique of the device was used to collect the blood fingerprints. Then its fingerprint extraction effect was compared with the fingerprint image taken by the ordinary light distribution method and the ultraviolet reflection photography method. Results After comparing the image effects of the methods above, the short-wave ultraviolet-excited long-wave ultraviolet method extracted the blood fingerprints on the dark complex background objects more effectively. Conclusion This method has clear imaging, obvious contrast, simple operation, and the weak blood latent fingerprint can be effectively displayed.
引文
[1]杨鸣,刘涛.短波紫外反射法显现香烟外包装塑料薄膜表面潜在指印[J].刑事技术,2015,40(4):428-430.
[2]彭恒,杨玉柱.应用红紫外数码相机拍照显现塑料钢窗上的汗潜指印[J].中国人民公安大学学报(自然科学版),2014,1(1):19-22.
[3]师康,杨玉柱.短波紫外反射照相技术显现垃圾袋表面血潜指印[J].中国人民公安大学学报(自然科学版),2010,1(1):42-44.
[4]王桂强.血指印的光学显现和照相技术[J].刑事技术,1996(6):38-42.
[5]汪旭峰.全波段CCD系统在紫外反射照相中的应用[J].警察技术,2005(3):43-44.
[6]张铭,徐峰,何慈光.全光谱反射照相法在潜在指印无损显现中的应用.中国刑警学院学报,2013(3):28-30.
[7]成磊,杨玉柱,徐政,等.短波紫外反射照相显现曲面客体上的潜在指印.辽宁警专学报,2015,3(2):72-78.
[8]周峰,刘满良,白钰.短波紫外线拍摄白色瓷砖表面灰尘指纹的研究.广东公安科技,2005(2):14-16.
[9]胡俊,魏斌.渗透性客体上潜在汗液指印紫外发光显现技术的研究[J].法制博览,2017,1(中):166-167.
[10]代雪晶,王鸣久,张鑫.全波段CCD成像系统在低温不可见荧光摄影中的应用[J].中国刑警学院学报,2011(4):43-44.
[11]代雪晶,王鸣久,何芳州.低温光致可见荧光摄影检验痕迹物证的研究[J].警察技术,2012(5):30-32.
[2]彭恒,杨玉柱.应用红紫外数码相机拍照显现塑料钢窗上的汗潜指印[J].中国人民公安大学学报(自然科学版),2014,1(1):19-22.
[3]师康,杨玉柱.短波紫外反射照相技术显现垃圾袋表面血潜指印[J].中国人民公安大学学报(自然科学版),2010,1(1):42-44.
[4]王桂强.血指印的光学显现和照相技术[J].刑事技术,1996(6):38-42.
[5]汪旭峰.全波段CCD系统在紫外反射照相中的应用[J].警察技术,2005(3):43-44.
[6]张铭,徐峰,何慈光.全光谱反射照相法在潜在指印无损显现中的应用.中国刑警学院学报,2013(3):28-30.
[7]成磊,杨玉柱,徐政,等.短波紫外反射照相显现曲面客体上的潜在指印.辽宁警专学报,2015,3(2):72-78.
[8]周峰,刘满良,白钰.短波紫外线拍摄白色瓷砖表面灰尘指纹的研究.广东公安科技,2005(2):14-16.
[9]胡俊,魏斌.渗透性客体上潜在汗液指印紫外发光显现技术的研究[J].法制博览,2017,1(中):166-167.
[10]代雪晶,王鸣久,张鑫.全波段CCD成像系统在低温不可见荧光摄影中的应用[J].中国刑警学院学报,2011(4):43-44.
[11]代雪晶,王鸣久,何芳州.低温光致可见荧光摄影检验痕迹物证的研究[J].警察技术,2012(5):30-32.