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In this paper, a new face detection approach based on skin color segmentation is presented. First, the color image is converted into YCgCrcolor space from RGB, because the performance of clustering is excellent in YCgCr color space. We get the segmented image by using the algorithm of support vector machine in YCgCr color space. Finally, we offer a face verification algorithm according to the geometric...
In traditional WSNs, sensor nodes usually compress the data before sending them to the cluster head. However, this strategy may not be suitable for image transmission. If the image compression task rests mostly on camera-equipped node, it will deplete its energy quickly. To prolong the network lifetime, a novel network architecture is proposed in this paper. Except the camera-equipped nodes, all the...
JPEG2000 is the state-of-the-art image compression standard which has many attractive features. However, the lifting coefficients of CDF9/7 used in JPEG2000 are a group of irrational numbers. It will result in complex computation and vast storage if we directly use CDF9/7 in lifting algorithm. Therefore, CDF9/7 needs to be implemented in fixed-point method. The existed fixed-point implementation methods...
JPEG2000, the state-of-the-art image compression standard, has many advantages, such as high compression efficiency and high image fidelity. However, because of its high computational complexity, real-time hardware implementation of JPEG2000 becomes a big problem when using it in deadline constrained applications. EBC algorithm is the main part of JPEG2000 which comprises more than 50% of the computational...
The approaches for remote sensing (RS) image quality evaluation can be categorized by two different criteria. One is the subjective image quality testing based on many observers. The other is the objective image quality testing based on mathematical calculation. Compared with the subjective method, objective image quality testing is easier for implementation. However, the traditional objective image...
With the rapid advances in wireless ad hoc networking and the dramatic growth in network-based video applications, there is an urgent need for content-rich video communications in ad hoc networks. However, it is a great challenge to support real-time video transport over such networks. Providing acceptable video stability in ad hoc networks is a demanding task for both the video encoder as well as...
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