WJY8 Video fluorograph

Test Fan Jian:

Alteration and concealment, addition and supplement, elimination and forgery, encryption of certificates, seal bills, fluorescence inspection, handwriting indentation, forgery of marks, trace fingerprints, trace physical evidence, ink detection, seal comparison, image measurement, image processing, etc.

I. light source image

Configuration of excitation light source:

1. Uniform strong light source: 1 × 24150w tungsten halogen lamp, equipped with special cooling fan, condensing lens and heat insulation glass;

2. Ultraviolet short wave: 254MM: 1 × 10W, visible fluorescence;

3. Ultraviolet long wave: 365mm: 1 × 10W, visible fluorescence;

4 visible side light: 1 × 50W, which can detect infrared absorption and reflection. The lamp holder can be adjusted at any angle to detect indentation;

6. Perspective UV lamp: 2 × 10W, printing ink;

7 perspective white light: 2 × 20W, can detect watermark;

8. Excitation filter of visible light source adopts band-pass filter with high transmittance and narrow half width, 000m, 365m, 50nm, 465mm, 515nm, 530nm, 565nm, 580mm, 900nm

9. Receiving filter: 000mm, 415nm, 450nm, 565nm, 700nm, 720nm, 740nm, 800mm, 900nm

II. Image receiving system

1. The high sensitivity camera is a 1 / 3CD color camera with a resolution of 650 lines and a sensitivity of 0.0001gx. For the near-infrared and visible spectral segments, there are high-resolution, high-sensitivity electric zoom lens with a relative aperture of 2, and full electric adjustment of aperture, focusing and zoom (1-30 ×).

III. image processing software

1. The storage / printing function can store all the images and data obtained by the document detector in the inspection process, and can cooperate with the printer to print out the required images;

2. The comparison function can compare the two detected images in horizontal and vertical direction by splicing or overlapping; static image and dynamic image can be compared in real time;

3. The gray value measurement can measure the gray value of any designated point or area in the image. In addition, the gray level change under each detection condition can be displayed in the form of curve. This method is especially helpful to identify the small gray differences between different characters in the image formed by the detected files.

4. Automatic depth of field synthesis and fuzzy image processing;

5. Motion blur processing, geometric correction of deformed image and fast image processing;

6. It can be used for reflectance and absorbance measurement, image measurement and annotation, seal backbone extraction, curve and linear image shaping, universal cutting comparison, image ghosting and other image processing.

IV. main functions

1. A variety of excitation light and receiving filter combination test the fluorescence difference of different inks;

2. The combination of reflection light source and receiving filter is used to test the difference of absorption and reflection of different ink to different wave band light.

3. The combination of reflected light source and receiving filter is used to test the effect of different band infrared light on different ink penetration.

4. The combination of transmission light source and receiving filter is used to test the effect of different band infrared light on different ink penetration.

5. The side light source irradiates the document in the way of grazing incidence, and inspects the trace of the document being scratched and cut;

6. The transmission light source irradiates the document from the bottom to the top, and inspects the trace of the document being cut and patched.

V. workstation supporting

1. Xtb-6b stereo microscope (equipped with 3 million color cameras): 0.7x-4.5x continuous zoom objective system, 10x large field eyepiece. Used to observe the writing order, seal and signature order, stroke characteristics and other subtle features;

2. Lenovo desktop computer: 19 inch LCD / 2G memory / 500g hard disk / 512M single display, used to realize the computer operation and image acquisition of the document detector;

3A4 color laser printer: used for color and black and white printing, etc.

4. A4 flat scanner: used for scanning and automatic identification of samples and test materials.