LOCO-I (LOw COmplexity LOssless COmpression for Images) is the algorithm at the results at the time (at the cost of high complexity), it could be argued that the improvement .. In the sequel, we assume that this term is tuned to cancel R. LOCO-I (LOw COmplexity LOssless COmpression for Images) is the . Faria, A method to improve HEVC lossless coding of volumetric medical images, Image . A. Lopes, R. d’Amore, A tolerant JPEG-LS image compressor foreseeing COTS. Liu Zheng-lin, Qian Ying2, Yang Li-ying, Bo Yu, Li Hui (), “An Improved Lossless Image Compression Algorithm LOCO-R”, International Conference On.

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Intensity distribution of color components of losless NBI image: In Golomb-Rice coding, the choice of k parameter is important since it dictates the code length. The size of the capsule should be as small as possible. Captured lossless WLI images from live pig’s intestine: An ultra-low-power image compressor for capsule endoscope. For medical diagnostics, these distortions can lead to inaccurate diagnostics decisions.

Captured NBI images from live pig’s intestine: A portable wireless body sensor data logger and its application in video capsule endoscopy. The different stages of the proposed algorithm as placed in the processing pipeline are briefly discussed below:.

Design Requirements While designing the lossless compression algorithm, we have set the following design objectives: Commercially available CMOS image sensors [ 1617 ] send pixel data in raster-scan fashion. Bothe algoruthm in-vivo and ex-vivo experiments indicate the effectiveness of the proposed lossless compression algorithm.

Marcelo Weinberger – Google Scholar Citations

Comparison of compressor with other works. The experimental setup and results are briefly discussed below. Computer Software The software is simply an image decoding engine that decodes the compressed images and generates viewable image data.


It can improve seen from Figure 4 that, after converting to YEF, there is less change in pixel values in chrominance E and F components of YEF color space than RGB components, which indicates that less information or entropy is contained there and these two components can be compressed heavily.

However, this solution can create timing error if compression and transmission time exceeds the input data rate of the image sensor.

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Low complexity color-space for capsule endoscopy image compression. The proposed compressor has lower computational complexity and memory requirements than the work in [ 24 ]. It is noted here that, medical implantable communication service MICS compatible RF transceivers that work at — MHz frequency, are the most suitable choice for transmitting data through human body [ 28 ].

The works in [ 8 — 10121315 ] are lossy compressors; these algorithms produces distortions in the reconstructed images which may lead to inaccurate olco-r.

An improved lossless image compression algorithm LOCO-R

The performance of the compressor has been validated using a miniature FPGA based capsule prototype and by performing ex-vivo and in-vivo trials with pig’s intestine and live pig respectively. Besides, it has very low computational complexity which will help reduce power and area consumption of the compressor. Due to the rare occurrence of sharp edges in endoscopic images, the difference between the component values of two consecutive pixels is llssless small.

The work provides simulation results only without any in-vivo trial for ikproved validation. Lin [ 10 ]. Conclusions In this paper, a lossless image compressor tailored towards capsule endoscopy images is proposed.


A review of compression methods for medical images in PACS. Therefore, the prime objective has always been to find efficient and lossless compression methods. Chen [ 24 ]. The motivation for the YEF color space comes from the fact that, algorith, images generally exhibit dominance in red color with the absence of significant green and blue components.

An improved lossless image compression algorithm LOCO-R – Semantic Scholar

Intensity algoithm of color components of a WLI image: Please review our privacy policy. Photograph of the capsule prototype size compared with a The software is simply an image decoding engine that decodes the compressed images and generates viewable image data.

After logging, the image data can be viewed in real-time on the data logger’s LCD screen or transferred to computer using a SD card. The prototype is developed in our lab that consists of three major units—the capsule, the data logger and the computer software running in desktop computer.

After color space conversion, the compressor takes the difference of consecutive pixels using differential pulse coded modulation DPCM and then encodes the imgae in variable length Golomb-Rice losxless 6 ] and unary coding. The received images are clear and lossless with details of the mucosa surface of the pig intestine.