An improved method to embed larger image in QR code

Embedding the owner image is the fundamental concept in identifying the ownership of the QR code. However, the image larger than the percentage of error correction, embedded in the QR code, could not be read. This research try to increase the size of the embedding image by investigating the change of encoding the pad characters and the adjustment of intensity of light. The largest image size that can be embedded and read through general QR code reader, with different errors correction levels, is found. The results are compared with other research on embedding an image in except the finder patternof QR code and our embedding images size are larger in all the correction levels.