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How to increase the size of photos by retaining the original quality. How to change the size of the image without loss of quality. Paint and Photoshop programs increase image resolution without loss of quality

As often, looking through photos on the computer, we threw cool frames, because they were too small in size and poor-quality. But with help special programs You can save almost any image!

Improving image quality is a very voluminous topic. To improve the quality of the photo in Photoshop, color correction, increasing sharpness, retouching and many other operations can be used. All of them require certain skills and possession of special techniques.

But there are less complex ways when the image increases simply without loss of quality. Below we will look at the example, how to improve the quality of the photo if you need to increase the photo without loss of quality.

How to enlarge photos without loss of quality

Everyone had to face the image little size Low quality. In such pictures, the pixels, points from which are built are strongly visible. raster image.

An increase in the image with stretching it free transform Only worsen position.

In this lesson, work will be held in Photoshop CC 2017. But first we will look at the method for other, older, versions of Photoshop. And then we show how Photoshop CC 2017 can make the entire procedure automatically.

Open the image in Photoshop. Now we will gradually increase it in several goals. It is worth noting that you can increase the photo and raise quality, but with a limit in size.

Press the keyboard key Alt + Ctrl + I. We will have a window "Image size". Need to be between "Width" / width and "Height" / Height Click was pressed. Then width and height will vary proportionally.

Running the image twice, each time by 20%. For this in the drop-down list opposite "Width" We change pixels percentage (Pixel / Percent), and a numerical value from 100% by 120% and click OK.. Then we call the image size window again ( Alt + Ctrl + I) and increase by 20%.

We increased image size from 950x632 pixels up to 1368x910 pixels.

For a visual comparison, get the original image (950x632 pix.) And the resulting (1368x910 pix.).

We increased the image almost one and a half times and even improved quality. As can be seen, pixelization is less noticeable if closer image.

It remains to refine the result. Apply filter "Smart Sharpen" to the resulting image.

We go: "Filters" / "Strengthening" / Smart Sharpness / Filter / Sharpen / Smart Sharpen. By moving the slider, select suitable sharpness. If in a small preview window on the image to click the left mouse button and hold, you can see the picture before applying the effect. The difference is noticeable. The smooth transition of colors (without cubes) on the lenses of glasses is especially noticeable. We completely removed the noise, shifting the slider to the end to the right. The radius of sharpness took 0.3 pixels, the effect was applied by 79%.

Once again, compare the results.

On the left - the original image, in the center - after increasing the size, on the right - using "Smart sharpness".

After use "Smart sharpness" In the photo noise went, the image became cleaner.

Here is our result.

And now you will increase the photo and improve its quality with the help of automatic products Photoshop 2017.

Open an image in Photoshop, press the keyboard shortcut Alt + Ctrl + I. We will have a window "Image Size" / Image Size. Pay attention to the item "Fit under" / dimensions. Expand this list. In it, you will see the blanks of the options for increasing / decreasing the image without loss of quality. We use the automatic selection (second point in the list). In the window that opens, select the item "Good" and click OK.. It is not worth the best to choose because the original picture is too low quality, and it makes no sense to increase it.

Please note if we managed to enlarge the image from 950x632 pixels and a resolution of 96 pixes / inch to 1368x910 pixels with the same permission, the program made an increase of up to 1969x1310 pixels with a resolution of 199 pix / inches.

Apply "smart sharpness."

Now you yourself were convinced that you can enlarge the picture without loss of quality, and at the same time even improve the quality of the photo.

It is worth noting that this method can be useful not only to increase and improve small photos. For example, you need to provide a photo for an Internet resource or for printing in publishing. Your photo is excellent quality and large size, but for the publisher is needed even more. Applying the described method of increasing the picture and improve its quality, you will get an excellent result. After all, a photo of large sizes with good quality It will take this procedure much easier.

The procedure is extremely simple. Do not put a cross in small pictures. Give them a second chance.

It is clear that not all modern mobile gadgets Or digital cameras have a fairly powerful matrix to take photos in a large amount, which could be shown on innovative television panels or ultra-high resolution monitors. This is where the question arises about how to increase the photo without loss of quality.

Backgrounds to enlarge photos

As already understandable, not every photo or image may be increased with the preservation of the initial level of quality. Apparently, it is very resourceful that it is the question of how to increase the size of a photo without loss of quality, because the reverse reducing process, on the contrary, the quality only increases.

It is worth paying attention to that not all applications, programs or applets are designed to perform such operations. In addition, it is worth paying attention to the type of file and graphics, in it present. If the file is converted and saved using conversion to a raster image, you can not even try to produce similar actions. The question is how to increase the photo without loss of quality and will remain unanswered.

Another thing, if you mean a simple zoom increase when viewing. There is nothing complicated here.

Initial image characteristics

To begin with, refer to standard graphic viewers.

As a rule, each software product of this type allows you to solve the problem of how to increase the scale of the photo without loss of quality, using the standard zoom slider or (as in the case of a standard Windows viewer or some other programs) of a special tool in the form of a plus card inside the icon.

Some details

True, there are nuances here. For example, in Windows (regarding the question of how to increase the size of the photo without loss of quality in terms of normal scaling), such actions can be made to a certain limit. It is clear that not all photos even with the original (standard) resolution of 72 points per inch can be increased to infinity.

It is worth adding to add that the problem is how to increase the photo without loss of quality, directly depends on what is the initial size, resolution, or even the depth of the color image of the original one. Probably, many are already clear that the smaller the initial picture, the harder it will be to convert it in terms of resizing or permission to the whole side. You can, of course, try, but, as a rule, nothing good does not work out.

How to enlarge photo without loss of quality: algorithm

Now a few words about how this process will occur. In principle, algorithms that make it possible to understand or at least imagine how to enlarge photos without loss of quality are reduced to several main aspects.

First of all, this is a definition of image type. In the case of raster pictures, the magnification will occur only in terms of pixel grid. This is not suitable for us. In vector graphics, everything else. By offset or removal of layers, it is possible to achieve a much better result. But that's not all.

Some programs like Asampoo Photo Optimizer come somewhat differently. They first produce color-modotics, then change the blackness or illumination of the image along the edges and inside, after which the improvement in the quality of the photo is built by stretching the overall histogram.

Naturally, for tasks associated with how to increase the photo without loss of quality, you can also use universal packages like Adobe Photoshop, which, by the way, is absolutely indifferent, which type of graphics is currently used.

What program to increase the photo without loss of quality

As for programs for processing photos in this perspective, you can not go far. Conventional applications such as Paint or "Pictures Manager" included in standard installation windows packages and Microsoft Office. Any versions will cope with this without any difficulty. Another thing is that an increase in this case can be made to certain limits.

It is better to use the universal utility Benvista Photozoom. Although she is a nervous of the same "Photoshop", nevertheless, in some functions, it "overmines." In "Photoshop", an image without loss of quality is recommended no more than 10%. The same program involves a solution to the problem, how to increase the photo without loss of quality using an indicator that gives up to 50%, that is, almost one and a half times from the source size.

Actually, in the work, the application looks much easier than many professional utilities, and the question of how to increase the photo without loss of quality, solves simply elementary. The advantage of this utility consists not only that it can convert dimensions without loss of quality, but also that there are two main windows, in one of which shows the preview, and in the second the photo is displayed in its real size (or part of the size apparently on the screen). This is convenient in the sense that you can always consider an increase in detail, and if necessary, change the parameters.

Interestingly, the scaling indicator can reach 400%, but when saving will be used original settings. If you wish, you can choose the image change algorithm, but, as practice shows, the built-in S-Spline Max system gives the most tangible and high-quality result.

Conclusion

In principle, when using any method, you can go to its parameters and choose those that match the process that is supposed to be run. Even the standard kit offers any elementary level yowser or a professional roomy capacity of features. Naturally, for those who are simultaneously dealing with photo editing or graphic images, there is a fairly flexible system for changing the settings, the use of custom filters, finally, full failure of automation with the settings for the necessary parameters and settings in manual mode. In general, it is working on what.

You can, of course, use and online services, but, it seems, the expected result will mostly not be given.

Good day, loyal readers and guests blog! Today's article is a small lesson that will explain to you how to enlarge the photo without loss of quality on the computer. To do this, I attached several instructions for changing the size of the image in Photoshop and Paint.net.

In addition to this, I will also tell you about other applications and online services that allow you to change scale. graphic files. Let's see in more detail in the material!

Working on the scale of pictures in paint.net

Everybody knows standard Program PAINT, which allows you to change the size of images by the number of pixels or by specifying the percentage ratio. However, it can not keep track of the drop in the quality of the picture during its scaling. Therefore, we will talk about another free raster editor of graphic files - Pant.net.

The named editor was created by two students specifically under the operating system. Microsoft Windows.. Now it is pretty powerful and convenient editor Photos and pictures that we can use to achieve our main goal - high-quality image increase.

To do this, you need to perform a number of actions:

However, do not forget that a very small picture cannot be increased many times and at the same time wait for the perfectly clear result. At least with this program. It is suitable for minor changes.

Using Photoshop features

I am sure that you all have heard about this multifunctional and powerful graphic editor. It allows you to solve truly complex tasks and copes with them perfectly. The manuals that I attached below are suitable for many popular versions of Photoshop, including under CS5 and CS6. Do not forget to increase the size of the web before scaling the file.

So, the first option: Use the "Image Size" command. For this you stand:

1. In Photoshop, enter the "Image" tab and select "Image Size";

2. In the dialog box that opens, specify the dimension of the picture in pixels or percentages:

3. Put the ticks opposite the last three items: "scale styles", "save proportions" in order not to distort the graphic file, and "interpolation";

4. And here is the most interesting. Interpolation directly affects image quality. When decreasing permission, part of the pixels is discarded, but with an increase in the program generates new similar pixels to fill them the missing amount. That's why the outcome pictures look blurry

Photoshop offers several interpolation methods:

According to the nearest pixels. Fast, but inaccurate method. It saves clear boundaries, and therefore, with an increase in the photo you can notice the step lines. More suitable for illustrations.
Bilinear. Conducts interpolation horizontally, and then vertically. At the output it turns out a more smoothed image, but the quality leaves much to be desired.
Biobubic. A sufficiently slow method, but more accurate. Graduations of tones at the exit are smoother, without visible teeth.
Sharp bicubic. Used to reduce pictures. Sometimes sharpness separate details exaggerated.
Smoothed bicubic. Just used with increasing graphic files.
Choose one of them;

5. Click "OK".

In this method there is one drawback. If you change the image size several times, then its quality will deteriorate significantly, since the program will add and / or delete pixels depending on your actions.

"Is it possible to get around these negative consequences?" - you ask. Answer: Yes. Immediately ask the desired size of the old picture or take advantage of this "finite ears":

In the "File" tab, select "Open As Smart Object ...";
After that, stretch the image to the desired dimensions;
Upon completion of the scaling, the Enter clad.

In this case, when reservation, the pixels will not be lost. And upon completion, the graphic file lights up slightly.

In any case, you can add contrast and sharpness to increase the clarity.

Image size on PC monitor

Since I spoke about the PC, then let's say that on the monitor the size of images decreases / increases the Ctrl (- / + key) combination or the mouse wheel with the same pressed with the Ctrl key. And if you are online, you can influence the size of the image by changing the scale in the View tab in the browser menu. The resolution is not rebored) by calling this command by clicking the right mouse button right on the desktop.

Now, if you follow the principle of "from simple to complex", you need to figure out how to increase the size of photos in Paint, because, firstly, this is a standard graphic editor (Start\u003e All Programs\u003e Standard), which comes with the Windows operating system, And secondly, many are not suspected of some of his abilities, including the "Resize" button on the Home tab.

We stretch pictures in Paint

In the "Size and Tilt" dialog box, they usually put a tick in the checkbox "Save proportions" and indicate either percentage ratio or a specific value in pixels. In the second case, it is enough to specify only the desired image width (change horizontally) so that the second parameter has changed automatically.

In some Paint versions there is another "point" parameter, which allows you to enter certain image dimensions. If all OK, so tell me the editor.

Finding out how to increase most users probably do not even consider it necessary to add that without loss of quality, believing that it goes without saying. However, this silent condition is not so easy to perform, because the image in the rough approximation can be compared with a mosaic of multicolored pixels. It is not difficult to imagine how the picture will look, if it is easy to stretch, because the number of informative pixels will remain the same, and the physical size will increase.

To somehow keep the quality to a certain extent, you need to fill the "voids", taking into account the content of the surrounding pixels. Unfortunately, kind old paint copes with this far from all better, but there are many programs that, using various data interpolation algorithms between stretched pixels (resample / resample methods), can increase images with very decent quality. Most of these services, among which are particularly popular with paid Photozoom Pro, are functionally similar and easy to use, but if you simply recommend them to those who want to learn how to increase the size of photos in "Photoshop", it will be an evasive answer.

The abilities of "photoshop" in changing the size of photos

If you are going to increase the image, you should keep in mind that the result directly depends on the quality and size of the source material. After downloading the photo in "Photoshop" in the "Image" menu, select the "Image Size" command, thus opening the same window in which the dialogue with the program is conducted.

If you fully trust the program, you can only specify the width and height in the "Document Size" block fields, and the remaining parameters are left by default, including the Interpolation function (Resample Image) and the Resampling method "Biobubic Automatic" (Bicubic), which, as a rule, prefer the remaining five algorithms. Then open with the "Auto ..." (auto) button "Automatic Resolution" window, select the desired quality (default is "good") and click OK.

Note: Ressampling (Resample) is a data control function on images that change sizes or permission.

Little tricks

May not everyone know about some well-known recommendations on how to increase the size of photos with minimal quality loss with any graphic Editor With the functions of correction and resampling, but it does not have to be "Photoshop".

First, it is necessary to prepare the original image, slightly increasing its scale and carefully examining the existence of noise, blurred areas (where they should not be), various stains and other probable defects. All disadvantages need to be eliminated (adjusted) and only then start changing the size.

Next, you need to increase the photo twice as many times, work with sharpness, contrast, saturation, then return to the desired size and make sure the quality remains at the proper level. Here is such a small trick, but it is not all.

To which people just do not think about the search for the original solution of how to increase the size of photos.

It turns out that the image size is 10% consolidated, visually worsening the quality will not be noticeable. It suggests an obvious conclusion: it is repeatedly increasing the size of 10%, it is possible ... Well, and then - who has some fantasy. But this method is not universal, and its illustrative use for all photographs in a row will not necessarily lead to good results, which largely depend on the various qualitative parameters of the image, including from the format. A black and white photo, for example, we manage to stretch up to 50%.

These "secret" techniques are allowed only in cases where there are no other options for some reason, and, most likely, "tricky products" will require a very serious post-processing in "Photoshop".

Specialized programs

If you need an answer to the question of how to increase the size of photos with minimal headache, use one of the specialized programs that and the interpolation algorithms are more than that of Photoshop, and their own original technologies are available. In addition to the previously mentioned Photozoom Pro, these are services: Perfect Resiz, Reshade Image Enlarger, Onone Genuine Fractals Pro V6.0, AKVIS Magnifier V3.0 and others.

You do not know how to increase the size of the picture? This is a very simple task, since everything you need is already installed on your computer. Read this manual, and you will learn how to change the size of the photo using 5 simple tools.

Method 1. How to resize images in Microsoft Paint

Find and run MS Paint. It is pre-installed on all versions operating system Windows. Start\u003e All Programs\u003e Standard\u003e Paint:

Take the image to the Paint window or use Menu\u003e Open (Ctrl + O).
In the main menu of the program, find the "Resize" item and select it:

The image change and image proportions panel opens. You can specify the value in pixels. Do not forget to check the checkbox " Save proportions" Otherwise, the image will be deformed:

To increase the size of the picture, click the "OK" button and save the photo.

Advice:

If it fails to set the desired photos, without stretching it, you can use the "Pruning" tool to remove unnecessary edges. How to do this, described in paragraph 3;
To open the photo faster, click on it right-click mouse and choose from context menu item " Open with Paint»;
It is best to save the image in the same format as the original.

Method 2. How to resize images in MS Photo Gallery

If Microsoft Photo Gallery is not installed on your computer ( Start\u003e Photo Gallery), you need to download and install it as part Windows Essentials. 2012 ;
Run MS Photo Gallery and find your graphic file;
Click on it right-click and select "Change size ...":

Choose a ready preset: " Small 640 pixels"," Middle 1024 "," Big 1280 ", etc.

Click " Resize and save" After you increase the size of the picture, the image will be placed in the same folder, it will also remain the original.

Advice:

If you need to specify the exact image size, in the drop-down menu, select " Custom"And set the size for the most part of the photo;
To change the size of several photos at the same time, select them by holding down the Ctrl key.

Method 3. How to change the size of the image in Photoscape

You can increase the size of the picture in Photoshop. Or use for this PhotoScape.

Upload photoscape and install it. Run the program;
Click the "Editor" tab and find the photo you want to change:

At the bottom of the image there is a "Resize" button, click on it.
Set a new photo size. Make sure the option " Keep the ratio of side»Enabled and click" OK ":

Save the edited image.

Advice:

If you need to change the size of multiple images, use the tab " Batch editor" Add a folder and change the size of all photos in it;
If you do not know the exact size, you can set the "percentage" from the source size.

Method 4. How to resize images in IrfanView

Install IrfanView - a great tool for viewing and increasing the size of the picture;
Add a photo by having threw it in the program window, or by clicking the first button in the toolbar:

Click the "Image" tab, select " Size / proportion» ( Ctrl + R.);
Install the new size in pixels, centimeters, inches, or as a percentage of the original image:

Save the image.

Advice:

You can use standard dimensions: 640 per 480 pixels, 800 per 600 pixels, 1024 per 768 pixels, etc.;
To save high quality Photos, make sure that the DPI parameter is set to at least 300.

Method 5. How to change image size online

To enlarge the size of the picture online, go to the PicResize site.
Click the " Browse."To choose a photo. Click " Continue.»:

Select the percentage of the original image, for example, 50% less. The tool displays the image size at the output. Alternatively, you can enter the exact size by selecting in the drop-down menu item " Custom Size»:

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