What is a semiconductor fingerprint identification

What is a semiconductor fingerprint identification with semiconductor ( Capacitance) Electric feel fingers grain potential differences between convex concave, calculated the fingerprint image or feature points, and be able to know the rest of the way accordingly. It is easy to understand, semiconductor fingerprint assembly work should be divided into two departments, a department is hardware, including the semiconductor device ( Sensor) , the disposal of the chip, memory chips, software division, a department is the core algorithm. Total four departments. In the semiconductor device ( Sensor) Hard feel potential difference, disposal of chips, hard to get the pictures or feature to stop operation, and judgment, memory chips, hard to store related data and algorithm, this is the core department in sensor, it is good or bad directly on the hardware level determines the effectiveness and accuracy, followed by the disposer, this is the centre of all semiconductor fingerprint assembly department, the disposal of the device determines the speed of algorithm, the general size, the power consumption of the rest of the effectiveness and smart door lock in the end is a memory, but is among the co-prosperity coexistence, sensor again good, not disposer, does not use the consequences, both are good before, but memory can store more data, general consequences are in vain. Software algorithm, in all semiconductor fingerprint identification in the position of the leader on the assembly, the hardware is the foundation of algorithm is important embodiment of the experience of the function and the fingerprint identification algorithm, it is to point to in the process of fingerprint identification, the acquisition of fingerprint image disposal, data feature extraction, feature, mating, and a series of clear instructions to solve the problem. All temporary, fingerprint identification algorithm consists of three departments, the first is beforehand disposal, important is to input fingerprint stop improving, to improve the accuracy of general features extraction; Followed by the fingerprint feature extraction: refers to a particular region or stop to extract characteristic information, to remove a lot of false features, improve the rest of the effectiveness and accuracy of knowledge; The end is the marriage, and retain information based on which is based on the above two points, various features and stop after the input fingerprint image of marriage. Semiconductor fingerprint linked to fingerprint lock assembly methods currently in use in the field of fingerprint door lock, semiconductor fingerprint assembly with fingerprint door lock, divided into the following two kinds of methods of the important one is absolutely self-reliance exists in the form of suite, another is integrated with electronic program components. Self-reliance is absolutely: semiconductor fingerprint assembly to suite exists in the form of temporary fingerprint door lock, the sensors, storage and treatment of three important parts are self-reliance in the fingerprint door lock electronics program, only through cable and electronic department of corresponding fingerprint door lock, fingerprint is the use of absolute self-reliance. The advantage is to is of strong suitability, easy maintenance, update easily, reduce the difficulty of electronic settlement, constitute the use of modular; Problem is the integration is not high, absolute volume is larger, capital is high; Integration plan is: semiconductor fingerprint recognition fingerprint door lock assembly in absolute integration method were temporary, only semiconductor sensor to plug or cable connection method and electronic PCBA motherboard cohesion of the plan, that is to integrate the disposer, storage and so on in the framework of all the electronic plan temporary, fingerprint identification is soluble in all the temporary plan, fingerprint identification assembly is only a part of the electronic program. Such practice strengths is: product quality easy to control, high integration, capital is absolutely cheap, update more easily; Problem is that increasing the difficulty opening, cannot use a modular, fitment is poorer, the same type of fingerprint identification assembly cannot complete mating with other electronic project. Has two methods of cohesion, the connecting method of fingerprint door lock factory in the first one was love most, accounts for more than a handful of integration plan of a department, but the integration plan of production enterprises big department is strong technical force and has a very fixed supplier production enterprises, and larger absolute scale.