Now the leading positions in jpeg format. Due to his ability to compress photos and color pictures several times, he is ahead of the minimum weight formats gif and png, and bmp still "grazes the back".
Now you probably can not find a web page on the Internet without having any photos or pictures on it. Today, it became the norm when making any web pages, because pictures are animated, adorned, supplement the main content of sites and are successfully applied in all areas of the web. By the way, the first browser that could show graphics was Mosaic (mosaic), which appeared almost simultaneously with the appearance of the hypertext markup language Html.
This is due to the fact that the camera does for you several processing options, such as increased contrast and level control. Although this works well in this example, it may not be your ideal appearance in every situation, especially when your lighting is not ideal. This means more time, but, ultimately, the opportunity to get the best quality from your images.
Professional shooting, journalistic shootingIf necessary additional range and tonal details.
- When you need to immediately display images.
- Shooting to use a lower quality, for example, on a website.
- You have a limited space on the memory card.
- Radial shooting.
Now almost all browsers support three basic formats of raster graphics used for the web - Gif, Png and Jpg. Historically, the first appeared gif and it was with it that in the first browsers it was possible to add and display pictures and media information. The developers at its creation made the main emphasis on the maximum reduction in the size of the saved image.
For me, it eventually comes down to the timing. Without loss means that the image is reduced, but does not degrade the quality. . There are also different color depths: indexed color and direct color. It can have palettes, both indexed and direct, but it's a little consolation. The file sizes are so unjustified that no one ever uses this format.
This means that for most uses in the file there can be only 256 different colors. This sounds quite a bit, and it is. Good for: Logos, line drawings and other simple images that should be small. Only actually used for websites.
After all, at that time the speed of the Internet was so small, and that the downloading of images did not last "forever", and a special "graphic exchange format" was developed and applied (that's what the GIF abbreviation stands for).
The peculiarity of Gif is that it can include a palette consisting of only 256 colors. Those. the image converted into this format will always contain no more than 256 shades, and all other colors will be created based on the mixing. But it is because of this very mixing and there are various unexpected artifacts when converting full-color photos to Gif. Because of this obvious and significant drawback, jpeg and png are increasingly used to display full-color images and photos on the site's pages.
This means that in fact it consists of lines and curves instead of pixels. When you enlarge a vector image, you still see a curve or line. When you enlarge a raster image, you will see pixels. However, it should be borne in mind that this depends on the complexity of the forms used. If your logo is particularly complex, it can slow down the user's computer and even have a very large file size. It is important that you maximally simplify your vector shapes.
This means that its values can be manipulated "on the fly." In general, they are best suited for simple flat shapes, such as logos or graphics. There are hundreds of image formats, each of which has a specific use case.
But gif is still popular in the web industry for one simple reason - it supports animation, the only one used on the web. Animated emoticons and avatars, postcards and banners - this is the result of the GIF format. The truth is now no less popular flash technology, but due to its simplicity gif in favorites from webmasters, especially beginners.
However, these 3 image formats have significant differences among themselves, which makes each of them suitable for specific use cases. Understanding these major differences will help us provide the best possible images to our websites and mobile application users.
Almost all forms of data that we see on the Internet - text, image, video, etc. - shrink to reduce data size and provide more fast transfer. Choosing the right format and compression is the main factor determining the size of the image.
The essence of this animation is that in the Gif container there is not one picture, but several times and there is also written the time through which these images will replace each other. At the same time, there is an opportunity to loop the animation and then the last one will start the first one again. Today there are a lot of specialized editors on the Internet in which you can create Gif animations yourself.
Compression can be of two types - without loss and loss. With lossless compression, you can restore the original image from a compressed image, because there is no loss of information during compression. This does not apply to lossy compression, that is, the loss of data in the lossy compression is irreversible. However, this compression ratio comes with a decrease in quality, which becomes more evident after the image is enlarged.
This marked reduction in quality or distortion of the image is called a compression artifact. In addition, compression artifacts become more visible. However, if the image contains text or lines where sharp contrast between neighboring pixels is required to highlight the correct shape, this lossy compression method does not give good results.
Also, gif can support a primitive way of generating transparency for the images being created. Why primitive? Yes, because Giff supports only two transparency values - transparent or opaque, without any intermediate states, which can be achieved by using alpha channels in Png formats.
This text represents a sharp contrast front between neighboring pixels. Despite the fact that further compression is still possible for this image, it is still the easiest of the three formats. During compression, the data is not lost, and no compression artifacts are represented on the image. This makes it unsuitable for storage or transfer digital photos high resolution, but an excellent choice for images with text, logos and figures with sharp edges.
If you look closely, there will be a lot of noise around the right top of the tree and sky. In a simple form, transparency indicates that it is completely invisible. Logos and icons often need to be placed on backgrounds with variable colors. Therefore, it is desirable that the background of these logos and icons be transparent, so that one image can be used for several background options.
Because of this, there are difficulties with displaying a smoothly changing level of transparency, so everything regarding the quality transparent background for images is the prerogative of Png. Almost all the elections with a transparent background that we can find on the Internet have an extension of png.
There are several variations of Png, each of which is designed to perform its tasks:
Partial transparency causes the edges to smoothly move in the background. Due to the lack of partial transparency, the edges have a bad effect of the denticle. There is a significant difference in the number of colors that can be supported by these 3 formats.
This is what makes them suitable for storing images of natural scenes. A color lock can be observed. This ensures that you can easily get an effective graphical experience on your website and in the application. You can start free and start delivering optimized images in less than 10 minutes. How you should save bitmap images, basically depends on how you intend to use them. The application may wish to provide you with a variety of different file formats, but this does not necessarily confirm the remarkableness of the file format.
Png 8 - here by analogy with Gif, when saving a photo in Png 8 only 256 colors will be used, so the results of image compression in these two formats of raster graphics will be almost identical. Just like in Gif, transparency is supported here, but with an alpha channel.
Png 24 - here for each pixel of the photo three color channels are allocated to 8 bits each (8 * 3 = 24), thereby realizing a full-color image formation without distortion. By the quality of the color display it surpasses even Jpg, but it will be heavier by weight.
Table 1 Image format functions
This is a container for artwork, and it can transfer vector art, bitmap images, or a combination of raster and vector content. They are simply contained and presented in a different way. Not that something is wrong in this. Today, there is no need to support two separate images: the working image and the finished file are now the same file. It may seem strange to use such newfangled files, but the workflow is changing. The demarcation between the photo composition and the page layout is blurred, and designers require more energy and flexibility from the software.
Png 32 - here three color channels are responsible for the formation of a full-color image, and the fourth is separately selected for the formation of an alpha channel, which allows the use of Png 32 to produce images with a transparent background. In Png 32 you can choose any change in the degree of transparency, so that these pictures will look equally good on all web pages with any background.
It is still important to know the problems with images created with your own files, and reasonably communicate with your printer before proceeding completely to the native path. You still spared the equipment and processes used by the printer, and if they are slightly behind the latest software and hardware development, you can limit your capabilities.
Gif-animation and its use on the Internet
Also called "linear art images", bitmap images contain only black and white pixels without intermediate gray shades. If you need to scan a signature to add it to an edit page or scan a pen and ink thumbnail, a raster scan can provide a clear and clean image.
Now let's summarize all the information and draw some conclusions.
Hello everyone on the blog. In general, in this article I want to dispel the myth about two data extensions for pictures, it's jpg and png the best one is not found yet. The thing is that both, depending on the application and on the texture itself, can affect the speed of the site, and optimization. What little has left you stumped? Then read on.
Life after Photoshop "or we squeeze on
An increase of up to 300 percent, it may look a little rough, but 100 percent clear and clean. If you are creating documentation for printing software or want to display a web page image in your project, you may need to turn on screen capture of the software interface components, such as menus or panels, in page layouts. Screen captures are easy to make using system Utility or special software to capture the screen, but for their clear printing requires special processing.
Two formats png and jpg what are the differences.
It seems like a picture and what's wrong with it, but it's all about colors. The format of jpg is the most common, because compared to others:
- It weighs less (but this is a controversial issue to be seen further).
- Easy to compress.
- High number of colors in the transmission.
The most common format of png-8 in site building, because compared to its png-24 counterpart, have a huge difference in the size of the file, so the second is used very rarely.
When they are part of the documentation for the software or training materials, it is important that the details are as sharp as possible. You need to understand this about screen captures: whether you accept them using the built-in screen capture function or a third-party screen capture application, you simply intercept the information that eventually becomes the pixels on your monitor. Regardless of your current monitor resolution, there is a one-to-one relationship between the fixed number of pixels that the application uses to visualize the panels and menus, and the number of pixels that you see on the screen, even if you use the scaling utility.
The main difference between the two formats is that jpeg is a hospital and colors can not be extracted from it to remove unnecessary ones, and thus reduce the volume of the picture, and that jpg does not have a transparent background, this format does not support it.
Destroy the myths.
The most important myth of all saitostroev that in any case not to use png, it's just nonsense, you can compress images of this format and optimize it better than jpg, many times with the right approach.
Setting the resolution of your monitor does not affect the number of pixels used by panels and menus. Although this panel was captured by three different monitor resolutions, the three captures are identical, each of which consists of exactly the same number of pixels.
Conduct the experiment: in software at your option, open the panel and position it in the middle of the screen. Take screenshots with two different resolutions. Make a free selection of the panel in one image, copy it and place it in another image. You will see that they are the same in counting pixels. Common images will be of different sizes due to different monitor resolutions, but the number of pixels used by interface components, such as panels, menus and tools, will be identical.
How to choose the right format?
See for example let's take a picture suppose our Russian flag.
I'll look at all the operations on the example of Photoshop, it's easier. Specially chose a large size and a little color, only three colors, and now I want to save it, see what happens, first I'll take the jpg format.
However, the panel consists of the same number of pixels in both cases. Therefore, it does not matter what resolution your monitor uses, or how large the panels can be displayed on the screen, or you use the utility to zoom in.
Unfortunately, this usually makes them look worse, softening the small details during interpolation. Yes, the prepress department of the print service provider will raise the flag, but the examples below show why the screen shots are not improving by increasing their resolution. This avoids interpolation by simply repeating pixels, rather than trying to create pixels.
But what if I save it in png.
The size has decreased 6 times almost. I did not do anything but set the minimum number of colors, just super I think. This method is suitable for those who do not fundamentally color rendition, as I have on the blog, all the screenshots are so made, I expose the minimum of colors to be readable and everything is fine.
This is the moment you need to scan, it's not just about sites. The size of the hard disk is not rubber, my mom's pictures and pictures of the work in general 246 gigs occupied, and she wondered why so much and not enough space. Just have to use my method and that's it.
This is not a suitable approach when scaling images of a photographic nature, but this is a useful solution for capturing a screen due to their particular nature. When performing this conversion, it is recommended to use a special approach to ensure the best rendering of the black type.
Wrong registration of Press will turn the text and other black or gray elements into a rainbow rainbow. The appearance of color elements will not be violated. This combines all the values equivalent to gray, to the black channel, which minimizes registration problems.
Of course, if the picture is multicolored with many colors and shadows, then png does not help, and then I advise you to use
- Revise all images on the blog and choose which format is better than jpeg or png apply for different kinds of pictures. Even those who have already compressed and optimized, because they can be further cut back, and without losing quality.
- When writing new articles, to evaluate this moment, I know that time will be more, but.
- Use the riot program mentioned above, or use this to compress jpg.
- Do not be lazy because it's in the truth you need.
And the business will take you two minutes more, and the benefit will be a whole car with a small cart.
Well, as you article, I think for some things I opened my eyes to you, which you do not even know, so use and use, for now, for now, I'm waiting for you in the comments.
