How to make an image larger in size. Resize an image without losing quality using Perfect Resize

To understand what processes are involved in the image resizing mechanism, read - building material any bitmap. In short, these are small colored squares that, like a mosaic, make up a picture.

When we talk about sizes, we say about permission. It is written as the sum of pixels in one row in width and one column in height and is written like this: 655x382. These are the dimensions of the following art:

Therefore, when resizing the image, we must change the values ​​of these pixels in width and/or height.

In case of size reduction, for example, let's change our example to 300x175, the image will already consist of 300 pixels in width and 175 pixels in height. No narrowing occurred. Photoshop recalculated the pixels in the image and figured out which ones it could get rid of.

But this process is not reversible. If you need to return everything back or do even more, it will start new process- increase.

In case of increasing size, Photoshop calculates which pixels are missing and adds them based on complex processing algorithms. This process cannot be of high quality, so when the image is enlarged, the quality is lost. The picture loses the clarity of details and becomes blurry. For clarity, I will increase the example above to original size. Compare:

Thus, when increasing, the quality will greatly depend on starting size images and from of course, to which you need to “grow”.

Image Size Dialog Box

So, the most basic way to resize an image is to use the menu command:

Image - Image Size.

Hotkey: Alt+Ctrl+I.

A dialog box will open:

This dialog box allows you, firstly, to obtain information about the current image dimensions, and secondly, to actually change them.

Pixel Dimensions

To change the image size change the values Width and Height. By default they are measured in pixels, but you can select percentages from the drop-down list.

Notice the bracket and chain icon. This means that when you change the width or height, the second value will automatically change in the same proportions as the original image. This is necessary so that it does not turn out compressed or elongated. To enable/disable this function, check the box. "Keep proportions"(Constrain Proportions).

Document Size

I mentioned this group of settings when talking about the printer. Permission(Resolution) changes the pixel size and affects print quality. For printers, feel free to set it in the range of 200-300 pixels per inch.

The Width and Height values ​​tell us what sizes of paper the image can be printed on. Changing the numbers will change the size of the image. Please note that there is also a function for maintaining proportions.

Scale Styles

Determines whether the program will scale any layer styles applied to the image. It is recommended to leave this option checked, otherwise, for example, the shadow you added may end up being larger or smaller than the picture itself.

Interpolation

This is your key to changing resolution without affecting image quality. Interpolation Resample Image is the process by which Photoshop responds to a resizing command by adding or subtracting pixels. The problem is that when interpolating, the program “makes assumptions”, and this can ruin the quality of the image.

When you first start the program, setup Interpolation is turned on, and is responsible for increasing or decreasing the number of pixels in the image. These processes reduce image quality as the program either creates pixels or chooses which ones to remove accordingly. By disabling the setting, you protect quality by locking the pixel size.

When you check the box Interpolation, you need to select a method from the drop-down list below. Why might this be needed? Sometimes you'll need Photoshop's help to create a larger image or smaller size than the original.

For example, if you have an image with the resolution 200 pixels per inch, the size of which when printed is 4x6, and the size of the printed version should be 5x7 and it is advisable to keep the resolution at 200 pixels per inch. To do this, you can check this box.

The drop-down options below the Interpolation check box determine what form of math Photoshop uses to add or remove pixels. Since more high quality images means more work, how better picture, the more time the program needs to complete the above process.

Here are your options, sorted by quality (worst to best) and speed (fastest to slowest):

• By neighboring pixels (preserves sharp edges) (Nearest Neighbor). Although this method results in the most low quality images, it can be useful because it creates the smallest files. Useful if you transfer files over the Internet, and you or the recipient have slow connection. This method works by looking at the colors of surrounding pixels and copying them. He is known for creating jagged edges, so you should only apply it to images with hard edges, such as illustrations, that have not been anti-aliased.
• Bilinear. If you choose this method, Photoshop will guess the color of the new pixels, choosing a middle ground between the color of the pixels immediately above and below, and to the left and right of the one being added. The result of this method is slightly better than when choosing the option By neighboring pixels and it's still pretty fast, but you're better off using one of the following three methods instead of Bilinear.
• Bicubic (best for smooth gradients). This method determines the colors of new pixels by averaging the colors of the pixels directly above and below the new one, as well as the two pixels to the left and right of it. This method takes longer than the previous two, but creates more smooth transition in areas where one color is replaced by another.
• Bicubic Smoother (best for enlargement). Close to the previous method in the way new pixels are created. Using this method, the pixels are slightly blurred so that new ones can be superimposed on old ones, giving the image a smoother and more natural look. Recommended use this method to enlarge images.
• Bicubic Sharper (best for reduction). This method is also similar to the method Bicubic (best for smooth gradients) in the way it creates new pixels, but instead of blurring entire pixels to improve the blending of new and old like the previous method, it only softens the edges of the pixels. It is recommended to use this method to reduce images.

Let’s imagine that the question of how to resize picture without photoshop? At the same time, you are on the Internet, and you need to crop a photo or picture for the questionnaire. You will do the right thing if you sit at your computer, or with a tablet, or with a smartphone in your hands, and go to the site.

After all, on this resource you can use an application for cropping photos online. Please note that the application supports gif formats, bmp, jpg, png. It is located in the “Working with Images” block called “Cropping Images”.

And, performing simple operations here, we resizing the image. After all, like everything else within the service, this application very easy to use. It provides the opportunity to get high-quality results very quickly.

With his help we resize photo. We trim it. And for this you just need to download desired image, select the fragment you need to trim and press the “Cut” button, having previously received information about the size of the future image. That is, the process involves a percentage increase or decrease in the image. There is always the opportunity to see how you cropped the photo and then save it.

What other features does the application provide?

When we resize a photo online, this does not mean that the whole process, which takes a matter of seconds, boils down to simply cropping the image online.

Anyone working with the image can still spend additional (but literally just a matter of) seconds to rotate the photo or flip it if necessary. But this is not all there is to it. You can also add beautiful effects or frame. And all it takes is a few clicks.

It is not surprising that the site’s users are people of various professions, ages and even hobbies. This is because some people prefer not to search for the application they need on various Internet resources. And this online service is good for many because it concentrates a wide variety of but frequently used applications.

And many of those who spend a lot of time on the World Wide Web (including in order to change photo), end up on the site quite naturally. Whether he is a designer or a webmaster, a journalist or a motorist. After all, many links on the Internet lead here, and the service is available to everyone without registration.

The service is also free. It can be used when preparing photos and music for blogs and websites. In addition, there is no need to download files, install and subsequently update programs.

This is appreciated both by those who are engaged in professional photography and by those for whom spending time with a camera is simply a great hobby. After all, the site has a suitable application for them. For example, for someone who is tormented by the question, how to resize an image?

Why is such a function needed?

The reason why one or another Internet user is forced to look for an online photo editor to use may be different. But, as experience shows, this is usually caused precisely by the need to quickly resize photo.

And this is usually the case. Let's say someone needs to upload an editable image to a website. For example, as a VKontakte avatar. As a rule, on most resources in global network For images uploaded to the service, there is a restriction on its dimensions. And this in this particular case means that you need to resize the photo online.

There is no way to do without this. However, the limitation is not only for dimensions. The limitation also applies to the weight of the image. That is, the problem requires such a solution when you need to reduce the photo. And this is very easy to do using an online photo editor.

But the “enlarge photo” function is used when it is necessary to increase the size of the image. Just like photo reduction, this function is used when someone processes an image very often.

For more detailed characteristics popular service, we should also mention such a “trick” as photographs in Instagram style. That is, with in this case the service provides the opportunity not only resize, but also to give the desired look to the photographs. Moreover, we are talking about those cases when you do not have mobile device and Instagram account.

We assure you that on personal computer Processing photos is much more convenient and enjoyable. The “Instagram style photo” feature works exactly the same as online photo cropping. This means the following: you need to upload a photo, apply effects and then save it to your computer. So, in particular, you can make the effect old photograph from a regular photo.

You don't know how to increase the size of a picture? This is a very simple task since everything you need is already installed on your computer. Read this tutorial and you'll learn how to resize a photo using 5 simple tools.

Method 1: How to Resize an Image in Microsoft Paint

1. Find and launch MS Paint. It comes pre-installed on all versions operating system Windows. Start> All Programs> Accessories> Paint:

1. Drag the image into the Paint window or use Menu > Open (Ctrl + O).
2. In the main menu of the program, find the item “ Resize" and select it:

1. The panel for changing image sizes and proportions will open. You can specify the value in pixels. Don't forget to check the " Maintain proportions" Otherwise the image will be deformed:

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

Adviсe:

• If you can't size your photo without stretching it, you can use the Crop tool to remove unwanted edges. How to do this is described in paragraph 3;
• To open a photo faster, click on it right click mouse and select from context menu paragraph " Open from using Paint »;
• It is best to save the image in the same format as the original.

Method 2. How to resize an image in MS Photo Gallery

1. If Microsoft Photo Gallery is not installed on your computer ( Start > Photo Gallery), you need to download and install it as part of Windows Essentials 2012 ;
2. Launch MS Photo Gallery and find your graphic file;
3. Right-click on it and select “Resize...”:

1. Select a ready-made preset: " Small 640 pixels", "Medium 1024", "Large 1280", etc.

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

Adviсe:

• If you need to set the exact size of the image, select " Custom" and set the size for larger side photos;
• To resize multiple photos at once, select them while holding down the Ctrl key.

Method 3: How to Resize an Image in Photoscape

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

1. Download Photoscape and install it. Launch the program;
2. Go to the "Editor" tab and find the photo you want to edit:

1. At the bottom of the image there is a button " Resize", Click on it.
2. Set new size photographs. Make sure the option " Maintain aspect ratio" is enabled and press the "OK" button:

1. Save the edited image.

Adviсe:

• If you need to resize multiple images, use the " Batch editor" Add a folder and resize all the photos in it;
• If you don't know the exact size, you can set the "Percentage" of the original size.

Method 4. How to resize an image in IrfanView

1. Install IrfanView - a great tool for viewing and enlarging pictures;
2. Add a photo by dragging it into the program window, or by clicking the first button in the toolbar:

1. Go to the "Image" tab, select " Change size/proportions» ( Ctrl+R);
2. Set the new size in pixels, centimeters, inches, or as a percentage of the original image:

1. Save the image.

Adviсe:

• You can use standard sizes: 640 by 480 pixels, 800 by 600 pixels, 1024 by 768 pixels, etc.;
• To maintain high quality photos, make sure your DPI is set to at least 300.

Method 5. How to resize an image online

1. To resize a picture online, go to PicResize.
2. Click the button Browse" to select a photo. Click " Continue»:

1. Select a percentage of the original image, such as 50% smaller. The tool will display the output image size. Alternatively, you can enter your exact size by selecting " Custom Size»:

Have you ever tried resizing an image to make it bigger? Typically, in most cases this results in loss of quality where the enlarged image looks blurry and unprofessional.

Recently one of our users asked us how to change an image when it is initially small, turning it into a large one without losing quality?

Why do enlarged images lose quality?

Bitmap (raster images) is the most commonly used image format on the Internet. All png files and jpeg belong to raster images. It consists of thousands of pixels. When we zoom in, we can see them in the form of squares.

Each of these points is strictly fixed in its place in the figure. Most image editing programs focus on resizing the image downward. Therefore, the loss of quality is not noticeable, since these pixels have become even less noticeable.

On the other hand, when you want to increase the size of an image, the enlarged pixels become very noticeable, causing the image to look pixelated and blurry. Like this example:

Is there a solution?

There is a solution, and it is to compensate for each enlarged pixel so that it matches its nearest one. This method is called such a terrible word as fractal interpolation or simply fractals. He produces best effect, if they want to use it to increase small image without loss of quality.

We will use it for editing in this popular program like Photoshop.

Method 1: Using Perfect Resize with Adobe Photoshop

This is a program that allows you to resize images very quickly and easily. It is available as an add-on to Photoshop.

The regular version costs $50, and the premium version which includes a photoshop plugin costs $150. Both of these versions are available for 30 days free period. If you are going to change the image size on a regular basis, then we recommend that you seek help from the program Perfect Resize. It's expensive, but it's high quality and professional if you want to increase the size of your image without losing quality.

Once again, I note that Perfect Resize is an addition to Photoshop.

Opening Adobe program Photoshop and the image we want to redefine from small to large. To do this, go to File -> Automate and select Perfect Size

This will open the image in separate window applications. You can select a set of presets (preset) which is on the left or select your size in the “Document Size” window.

After entering the image value, you must save the changes and apply them to Photoshop file. Go to File –> Apply.

Now you can export this file by saving it as a web document.

That's it. Now our modified image will look quite good than with normal enlargement.

Method 2: Using the free Gimp program

This free alternative Photoshop. It also resizes images with minimal loss of quality. But it is somewhat inferior to perfect size in terms of functionality.

So let's see how to change an image from small to large using Gimp.

Open the image that we are going to enlarge in Gimp. Just go to File -> Scale Image.

Enter the desired image dimensions. In the Quality section, select SINC (Lanczos3) as the interpolation method and click on the Scale image button.

That's it! Now you can export the image to the Internet. Below is an example made using Photoshop (left) and gimp (right). At first glance it is very difficult to notice the difference.

Method 3: Enlarging the Image Using Irfanview

Irfanview is a compact photo editing program available for operating room users Windows systems. It is very easy to work on increasing the image size.

All you need to do is open the image and click on Image -> Resize Resample

A dialog box will immediately appear in which you can select your own image size and enlargement method and be sure to check the “Apply Sharpen After Resample” box, which means applying sharpening to the image.

The image will be changed, save the results to your computer.

How did you notice free options enlarged images are not particularly impressive good quality, but you can change the sharpness and contrast to minimize the loss of quality.

Often when sending photos from SLR camera Images need to be resized. Sending 15-20 megapixel pictures with a volume of 30 megabytes to friends is simply pointless, and the transfer process will take large number time. However, other situations may arise in which you will need to change the file size and resolution. How to resize a photo?

First, it’s worth clarifying that file size and resolution are two different concepts. The volume (size) of a file is the space that an image occupies on disk. The resolution of an image is the number of pixels vertically and horizontally. Moreover, the higher the resolution of the photo, the larger the file size. But the file size is affected not only by the resolution, but also by the brightness/contrast of the image and its format. It is known that pictures in TIFF format take up several times more disk space than images in jpeg format.

Changing the file size

Let's talk about how to change the file size of a photo. If the photo is not in jpeg/jpg format, then by resaving it in this format, you can reduce the file size by a couple of times. You can resave the file using graphic editor Paint, which is included in every Windows. To do this, right-click on the image and open it using Paint.

There is another way to open a picture in Paint. Launch Paint (“Start >> Accessories >> Paint”) and open the picture simple drag and drop her in open window editor.

Then click on the rectangular blue button at the top (formerly the “File” menu) and select “Save as >> JPEG image”.

Then we give the file a name and save the file in a location convenient for us.

Changing image resolution in Paint

You can also change the resolution of a photo using Paint. Open the image in the editor and click “Resize” at the top.

Then move the checkbox to “pixels” and set right size photos. Confirm this action with the “OK” button.

After resizing, save the photo.

Change image resolution using Microsoft Office Picture Manager

What should I do if I need to resize more than 100 photos? Opening each one in Paint takes too long, and not every user can withstand this “monotonous procedure.” Microsoft has a great program that is barely used by most users. Microsoft Office Picture Manager (MOPM) is automatically installed with the package Microsoft Office, starting with Office 2003.

So, to resize several images at once, you need to do the following:

Resizing a Photo Using Paint.NET

Paint.NET is a free modification standard Paint, possessing a large number functions and is a kind of “Photoshop for beginners”. The program is easy to use and runs on any PC, unlike Photoshop.

But its main advantage is that it allows you to change the file size without changing the file resolution and its format.

To change the file size in Paint.NET, you need to open the image in the program.

Then click the “File” button at the top and click “Save”.

This is where the main feature of the program lies. By moving the “quality” slider, you can increase or decrease the file size without changing its resolution. For example, this is the size of the file in 100% quality:

And here is an image with quality at 50%:

The difference is quite noticeable: 187 kb versus 28 kb. This way you can reduce the size of any photo without affecting its resolution.

Many people prefer to use special services to resize a photo online and for free. But they should be used only in extreme cases when you don’t have a computer at hand.