The invention discloses a coding method, a coded graph, a coded graph reading method and a shooting device. According to the method disclosed in the invention, three of the four positioning blocks inthe coded graph are respectively positioned at three corners of the coded graph, the other positioning block is only tangent to the edge of the coded graph, and therefore an
asymmetric distribution configuration of the four positioning blocks is formed. According to the method, the existing two-dimensional code standard is replaced, the
authorization cost and the manufacturing cost required by theexisting two-dimensional
code generation software are saved, the method is not limited by the use of the existing two-dimensional
code generation software, the coded graph can be accurately and quickly positioned, and the position of the initial coded block in the coding area can be quickly found. According to the method disclosed in the invention, the size of the coding graph area and the size of the coding area can be set according to the data size of the application scene, and therefore the
data information recorded by the coding graph can be flexibly set. The coding mode of the coding area is simple, and the efficiency of a scene with a small coded data size is high.