According to the method, whether the plate needs reverse color is judged by calculating the average gray level of the license plate gray image as well as the number of pixels whose gray level is higher than the average.

Study and application of fading reaction of Congo red with CTMAB

The result show that in the presence of surface active agent SDS and in the H2SO4 medium,the fading reaction has high sensitivity,and the molar absorptivities was 4.

The fading reaction of CPA-mA with Cr 2O 2- 7 was studied.

Synthesis of 8-(8-quinolylazo)-5-aminoquinoline and its color reaction with cobalt(Ⅱ);

Synthesis of a new reagent 1-(4-Nitrophenyl)-3-(5-Methypyridyl)-Triazene and its color reaction with cadmium;

Synthesis of the new reagent 1-azobenzene-3-(3-nitro-5-chloro-2-pyridyl) triazene and its color reaction with zinc;

Study on the colour reaction of a new reagent 1-(4-nitrophenyl)-3-(6-methbenz-thiazol)-thiazene with cadmium(Ⅱ);

Synthesis of 8-aminoquinoline-5-azo derivatives and their colour reaction with cobalt;

Study on the Colour Reaction of Fe(Ⅲ) with a new Colour Reagent 8 Quinine Azo Quercetin;

In this paper the synthesis of the new reagent 1-(4-nitrophenyl)-3-(3-nitro-5-chloro-pyridyl)-triazene(NPNCPDT) and its chromatogenic reaction with zinc have been studied.

1-(4-methyl-6-hydroxyl-pyrimidine)-3-(phenyl-azo)-triazene(MHPPAT),as a chromogenic reagent,was synthesized and its chromatogenic reaction with copper was studied.

Isolation and Purification of Taxol and Cephalomannine from Taxus Cuspidata by Normal Phase and Reversed Phase Chromatography;