By Tieniu Tan, Qiuqi Ruan, Shengjin Wang, Huimin Ma, Kaiqi Huang
This ebook constitutes the referred lawsuits of the eighth China convention on photograph and photographs applied sciences and functions, IGTA 2014, held in Beijing, China, in June 2014. The 39 papers awarded have been conscientiously reviewed and chosen from one hundred ten submissions. They conceal a number of elements of study in photograph processing and portraits and comparable subject matters, together with item detection, development acceptance, item monitoring, type, photo segmentation, reconstruction, etc.
Read or Download Advances in Image and Graphics Technologies: Chinese Conference, IGTA 2014, Beijing, China, June 19-20, 2014. Proceedings PDF
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Extra info for Advances in Image and Graphics Technologies: Chinese Conference, IGTA 2014, Beijing, China, June 19-20, 2014. Proceedings
Comp parison between JPEG, JPEG 2000 and JPEG XR Standard HDR support Subjective lossless compression ratio Lossy/lossless compression Scalability Key technology Encoder complexity JP PEG × ≈1/5 JPEG 2000 √ ≈1/10 JPEG XR Lo ossy (JP PEG LS suppo ort lossless) Lossy/lossless Lossy/lossless best Discrete Wavelet Transform(DWT), adaptive entropy coding 15 times Good Photo Coore Transform(PCT T), adaptive entroppy coding 8 times × Diiscrete Cosine Trransform (D DCT), Huffman entropy coding 1(b base) √ ≈1/10 Like JPEG 2000, an imaage is divided into small parts so that they can be processsed one by one more easily in JPEG XR standard.
These drawbacks are overcome if the proposed method is used. The input data for our algorithm are RGBE images. We need to convert from the RGBE image to the RGB image, and then convert from the RGB image to the HSV image. Luminance is obtained from the HSV image to perform the tone mapping process. Tone mapping consists of global tone mapping and local tone mapping. First, a global histogram adjustment method is applied for the initial global tone mapping. After that, a retinex-based local tone mapping is applied, which uses L0 smoothing filter as the surround function to reduce halo artifacts.
A MB has high texture complexity while TCth>1, and I4MB is selected as the prediction block size; otherwise, I16MB is chosen. 2 Mode Decision for Chroma 8×8 Block Intra Prediction In the intra prediction mode decision algorithm, the conventional calculation times of Rate-Distortion-Optimization is 4×(9×16+4)=592, the prediction mode of chroma block is used as the large exterior loop. By reducing the number of chroma candidate prediction modes, a significant computational saving can be achieved.