Advantages Of Image Compression

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Abstract this paper explains about image compression review using DWT (Discrete Wavelet Transform) and DLT (Discrete Cosine Transform) method, the compression in the image must be closely related to the use of memory and the transmission of digital images. The wavelet transform decomposes the image into shape. For display and graphical display with DCT and DWT. DWT is used for compression application. Wavelet transform divides the information of an image into approximation and details sub-signals. The approximation sub-signals show the general trend of pixel values and other three detail sub-signals show the vertical, horizontal and diagonal details or changes in the images. If these details are very small then they can be set to zero without…show more content…
Introduction The image can be defined as a matrix. to reduce redundancy is using Image compression and randomness of image due to increased storage capacity and image efficiency. It is therefore important to compress the image by storing the information needed to reconstruct the image. To compress any image, redundancy must be removed. Sometimes images that have large areas of the same color will have the advantages and disadvantages of compress [1-3]. The main purpose of this paper is to reduce irrelevance and redundancy of JPEG and PNG image data in order to store or transmit data in an efficient form using DCT and DWT. different image compression formats and performance forms in different image formats as well as developing image compression systems using Discrete Wavelet Transform and compare it with existing techniques or systems. Image compression can be done in two ways: • Losing Compression • Lossless Compression If any pixel values are changed from a digital image then the technique will be lost and this technique is called 'lossy' compression. Some information stored by images after compression and decompression are known as 'lossless' compression…show more content…
Benefit of Compression image is: • Data transmission time on the data communication channel is shorter Examples: sending pictures from fax, video conferencing, mobile phone, downloading from the internet, sending medical data, sending the internet, sending medical data, sending from satellite, etc. • Requires less memory space in storage than uncompressed images Compression process is the process of reducing the size of a data to produce a solid or compressed digital representation but still can represent the quantity of information contained in the data. In images compression leads to the minimization of the number of bit rates for digital representation. The larger the image size, the more memory it needs. However, most images contain duplicate data, namely: • a pixel has the same intensity as its neighboring pixel, so storage of each pixel wastes its place • many images contain the same parts, so these same parts need not be encoded repeatedly because they are redundant or

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