Images can be saved in many different file formats but some of them are to a higher quality than others. There are different file formats that images can be saved as because some of the formats perform better with specific tasks than others. JPEG is now the most common file format that is used for storing images but when an image is saved using this particular format, some of the data may be lost because the file gets compressed.
Within the above image, the JPEG image is clearly the image with the highest quality compared to the GIF and PNG images. Even though the PNG image looks like it has a similar quality to the JPEG image, PNG requires more space to be stored because file format is larger. The GIF image is the image with the least quality but the file size is much smaller than the other two images.
--------------------------------------------------------------------------------------------------------------------- JPEG file format allows image file size to be compressed but the picture loses its quality and the pixels are more noticeable. JPEG has the highest quality so it takes the longest time to load as it is the biggest file size. Smaller file sizes are used as thumbnails while bigger JPEG are used for things, such as posters, since the quality on small JPEG files aren't good enough to be used as a large poster because all the pixels would be visible. Compressing an image could be useful if you’re uploading a picture to the internet because it would load a lot quicker.
Within the image above I have altered all the four images to JPEG. I also changed the quality of each of the images too. The first one is 100% quality which means it is of highest quality and the others are lower.The second image is at 80%, the third is at 30% and the last in 10%. As the file size increases the more you increase the image quality meaning file format and compression work hand in hand.
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The depth of colour on an image determines the colour quality that is available. With GIF files you can include, remove and alter the colour depth of a picture. Changing the colour depth makes the file size smaller and uses less colours overall. If the exact colour for a particular image is wanted then the colour depth needs to be about 24 bit and this will increase the overall quality of the image.
The depth of colour on an image determines the colour quality that is available. With GIF files you can include, remove and alter the colour depth of a picture. Changing the colour depth makes the file size smaller and uses less colours overall. If the exact colour for a particular image is wanted then the colour depth needs to be about 24 bit and this will increase the overall quality of the image.
I have changed the file format of all the images to GIF in the above image. The images now displays the variety of colours that can be included while the file size increases along with the image quality. In the first image, that is the original one. The second image there are 256 colours, the third image has 128 colours and the final one has 32 colours. The difference between each of the images are clear to see especially between the original image and the fourth image.
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Image resolution are the details that an image is able to hold; the higher the resolution, the more detail there is. If the image resolution was reduced, the image would not be able to hold as much detailhowever this would load faster on webpages, even with a slow connection. It makes the image a smaller file size but if the resolution is changed to 300 it enables the image to hold more detail making the image more suitable to be printed out making it clearer.
Image resolution are the details that an image is able to hold; the higher the resolution, the more detail there is. If the image resolution was reduced, the image would not be able to hold as much detailhowever this would load faster on webpages, even with a slow connection. It makes the image a smaller file size but if the resolution is changed to 300 it enables the image to hold more detail making the image more suitable to be printed out making it clearer.
