1. A similar shader search apparatus using image feature extraction, comprising: an image extraction unit configured to classify color, texture, pattern features of a 2D image, which is to be analyzed, into a color feature set, a texture feature set, and a pattern feature set, numerically analyze the respective feature sets using an image feature extraction formula, and extract a feature value of the image; a shader extraction unit configured to analyze a rendering node in which shaders are connected to each other, in order to extract perception features of color texture and pattern from a predetermined stored shader, classify features having an effect upon color, texture, and pattern into a color feature set, a texture feature set, and a pattern feature set depending on the analysis result, numerically derive the classified feature sets using a shader feature extraction formula, and extract a feature value of the shader; and a distance function calculation unit configured to receive the image feature value and the shader feature value, calculate the similarity of color between the image and the shader using a vector-based distance function, and calculate the similarity of texture between the image and the shader using the Euclidean distance function.