Efficient image compression techniques for compressing multimodal medical images using neural network radial basis function approach

Abstract

Image compression technique is used to reduce the number of bits required in representing image, which helps to reduce the storage space and transmission cost. Image compression techniques are widely used in many applications especially, medical field. Large amount of medical image sequences are available in various hospitals and medical organizations. Large images can be compressed into smaller size images, so that the memory occupation of the image is considerably reduced. Image compression techniques are used to reduce the number of pixels in the input image, which is also used to reduce the broadcast and transmission cost in efficient form. This is capable by compressing different types of medical images giving better compression ratio (CR), low mean square error (MSE), bits per pixel (BPP), high peak signal to noise ratio (PSNR), input image memory size and size of the compressed image, minimum memory requirement and computational time. The pixels and the other contents of the images are less variant during the compression process. This work outlines the different compression methods such as Huffman, fractal, neural network back propagation (NNBP) and neural network radial basis function (NNRBF) applied to medical images such as MR and CT images. Experimental results show that the NNRBF technique achieves a higher CR, BPP and PSNR, with less MSE on CT and MR images when compared with Huffman, fractal and NNBP techniques.

Semi-lossless Fractal MRI Image Compression Based on Fixed length Technique

“…The evaluation metrics have been used to evaluate our system performance on PSNR and CR. The results of the evaluation included comparisons between the proposed system and two other semi lossless systems are L2-LBG [17] and NNRBF [18].…”

Radyal tabanlı fonksiyon ağlarını kullanarak EKG sinyallerinin sıkıştırılması

“…Perumal ve ark. [23] Huffman, fraktal, Geriye yayılmalı sinir ağları (GYSA), ve RTFA gibi farklı sıkıştırma tekniklerini manyetik rezonans (MR) ve bilgisayarlı tomografi (BT) görüntülerine uygulayarak sıkıştırma oranlarının karşılaştırmasını yapmışlar ve en iyi sonucu RTFA tekniği ile elde etmişlerdir. Yine aynı araştırmacıların bir başka çalışmasında [24], destek vektör makinesi (DVM), RTFA ve GYSA tekniklerini MR, BT ve Pozitron emisyon tomografisi (PET) görüntülerine uygulayarak sıkıştırma oranlarını karşılaştırmışlar, DVM ve RTFA tekniklerinden oldukça iyi sonuçlar almışlardır.…”