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Compression methods are used for images compression and most common compressions are JPEG which is lossy (you can lost some details or quality of image), LZW which is lossless, RLE and ZIP also lossless compressions.
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What is an image file format and What are two commonly used image formats?
commonly used formats are png and jpg.
Why lossy compression is used for JPEG image?
The JPEG format was specifically designed to minimize the size of the file beyond what other formats were able to do at that time (for example BMP RLE or GIF LZW). In order to achieve it, it was decided to accept minor degradation of the image quality - with other words the compression is lossy. For more details about how the JPEG format compares to other image formats, please see the related question.
What is the file extensions .bmp and.jpg are used for?
Pictures and other images. These are the most common image formats, and can be used for anything from a desktop wallpaper to a graphic in a slideshow.
During JPEG compression some data was discarded. Why it does not affect the overall quality of an image?
It does but not in a way that is visible to the eye as it's a reasonbly . What format is the original in? Formats such as GIF are high-compression "lossy" formats so the compression is more obvious. If you do small scale editing you'll notice the quality dropout as the image will appear blurred and then just pixels at a higher zoom. Then it's a headache.
Which compression type using in BMP image file?
Which compression type using in BMP image file? The BMP image file normally doesn't use any compression at all. This is why usually they are large files and are not used on the web.
Why you are using image compression?
Image compression is used to reduce the size of the stored data. This is done either for storage purposes or to improve transfer times.
What are some different tools used for image compression?
one of them is photoshop
What is an application of Slant transforms?
Slant transform is used in image compression techniques.
How does compression effect images?
Any type of compression will ideally reduce the size of an image. There are two types of compression which describe how they affect images:"Lossy" compressionThis type of compression reduces the size of the image by removing some data from it. This generally cause, effect the quality of the image, which mean it will reduce your image quality."Lossless" compressionThis type of compression reduces the size of the image by changing the way in which the data is stored. Therefore this type of compression will make no changes in your image.
How to calculate Compression ratio for an image?
compression ratio=uncompressed image size/compressed size
What is the need for compression?
motivation of lossless image compression
7-Zip?
A file compression champion, known for its outstanding compression metrics. Supports a wide range of formats.
