Lossless compression of map contours by context tree modeling of chain codes

Encoding of images containing no-data regions within JPEG2000 framework

“…For a clear distinction between data and no-data regions, the proposed techniques need to transmit the shape of the no-data regions. Since this does not influence the comparison among the proposed techniques, the transmission of the shape belonging to the no-data regions is considered as a complementary problem that is not addressed in this work (see, for instance, [20]). Table 1 reports the results obtained by the four proposed techniques for all the images of the RS corpus, and Table 2 for all the images of the Medical corpus.…”

Symmetry detection in 3D chain coded discrete curves and trees

“…We believe that our proposed symmetry detection methods are potentially useful for data compression. On the one hand because chain-code techniques are known for preserving information and allowing considerable data reduction (e.g., [29][30][31][32][33][34][35]). On the other hand because the basic strategy of data compression consists in reducing, as much as possible, redundant data, and symmetric elements are a type of redundancy (e.g., [36,17,37]).…”

Leader Follower Formation Control of Ground Vehicles Using Camshift Based Guidance

“…Freeman chain code [22] method is used for finding contours, which is based on 8 connectivity of 3x3 windows of Freeman chain code. Two factors determine the success of the algorithm: The first factor is the direction of traverses either clockwise or anticlockwise.…”