Many people still don’t know how to change the file size in the program. Adobe Photoshop . Let's take a closer look at this simple editing process and find out how to quickly change the file resolution and its physical (virtual) length and width.
First, let's create new document to make it clearer. To do this, go to the menu item File-New, or press the keys CTRL + N.
After this, we should have a dialog box with a choice of parameters. Among them you will find such as the choice of measurements (pixels, inches, centimeters, etc.), the size of the width and height of the new document, resolution, color model, etc.
Optimal for file editing (printing) are: 300 pixels per inch (resolution), width and height - at your discretion (original photo size), color model - RGB, image background - either transparent or white, etc.
When changing the width and height of an image, look at the resulting photo size, since when editing, the main thing is not quantity, but quality. The result of your actions will also be influenced by the bit depth of the document - these are 8, 16, 32 bits. I recommend starting with 8 – you can’t go wrong!
As for the background of the image, it is, of course, better to use a transparent one. But you can leave the white one, since it is more convenient to work with, and you can always remove it later. Pay attention to the button Save Preset– using this option, you can save your size and use it in the future (re-editing a similar photo).
Click OK and look at the result. I put transparent background and the width and height dimensions are 800 by 600 pixels, respectively. In addition, I indicated the document resolution - it is 300 pixels per inch. To view the dimensions, you can press the keys on the keyboard ALT + CTRL + I.
Now, when we change the size of the photo (for example, reducing it to 400 pixels wide), we must choose whether to change the proportions of the document. The paperclip icon next to the size values is responsible for these settings. If you remove it, you can change the document beyond recognition.
If you enlarge the photo, be sure to keep an eye on its size, since Photoshop may simply not process it. new format because of low memory.
I changed the document properties and set the values to 300 by 300 pixels, that is, it turned out to be a square (not Malevich).
Let's take a real photo and edit it in Photoshop. Now let's go to the menu Image-Image Size .
Let's try to fit the image to the format of a standard A4 sheet. To do this, let's go to the image adjustment selection menu and select the format we are interested in.
You need to pay attention to the fact that the dimensions of the photo can also be changed as a percentage, which is very convenient when creating actions. For example, if we put a value of 50% in the width field and remove the aspect ratio, we will get an interesting effect.
To do this you will need Adobe Photoshop CC. These steps will work in earlier ones as well. Adobe versions Photoshop with slight differences in menu item names. This lesson applies to.
The easiest way to resize an image in Photoshop is to use the Image -> Image Size command from the top menu bar.
Under the Fit to option, you can select one of the available options:
Select the appropriate size and click ok.
Using parameters Width , Height And Resolution, you can resize the image. The drop-down menu on the right allows you to select the unit of measurement. For example, if you want to set values in pixels, centimeters, percentages or inches.
Now compare the resize panel in Photoshop CS5:
A lock between the width and height means that both of these values will change proportionally. The changes will not distort the image. The lock can be disabled in some cases, but keep in mind that then the image will be stretched when resizing.
Finally, the parameter Resample(Resupply, or Interpolation) determines how Photoshop will resize your image. Default value Automatic is suitable for most tasks, but there are other options available that are more suitable for increasing image sizes.
When you select all necessary settings and click ok, the program will resize the photo.
The Canvas Size tool is available through the command selection Image – > Canvas Size(Image -> Image Size). Unlike the Image Size command this command does not resize the photo, but cuts out a part of a certain size from it. If you set the canvas size to be larger than the current values (for example, 110% height and 120% width), then the image will remain with its original dimensions, only the size of the document will increase due to the addition of a background (transparent if the image is in PNG format or colored. In other words, by resizing the canvas, you can add or remove pixels to increase or decrease the overall size canvas.
We set smaller values - the image is cropped, and larger values - a colored frame is added around the original photo.
Let's look at an example. Here is the original image:
By reducing the canvas size, the image is cropped:
By increasing the width of the canvas, white stripes are added to the image on the right and left.
Bottom line: the image remains the same size, but adds extra pixels to work with. You can place other graphics on them, create a frame, make a background, manipulate the image dimensions (when you need an image with certain pixels in width and length).
There are two main areas in the tool window:
Current Size(Current size) – here you see information about the dimensions of the image before changes. In area New Size– you set the desired width and height parameters. Here you can also select the units of measurement in which you are going to convert.
Parameter Anchor(Location) helps determine the direction in which new pixels will appear. Click on the grid square; it will schematically indicate the location of the original image on the new canvas.
At the bottom of the window there is an option to select the canvas color - Canvas extension color(Canvas extension color). Thanks to it you can choose the color Foreground, or primary color (foreground), color Background, or background (background), white, black, gray or other (choice of color in the palette).
To do this we will use the Crop Tool (frame). With its help, we reduce the image by cutting out the necessary parts from it. So, for example, you can cut out a face from a photograph of a person, and we get .
Get started by selecting the Crop Tool from the Photoshop Tools panel.
After selection, click on the document with the photo and, while holding the left mouse button, drag the tool diagonally to the lower right corner. Part of the image will be selected, the boundaries of which will be the edges of the frame. Before the transformation is complete, you can move the frame, shift the borders, and even rotate it. When you are satisfied with the result, press Enter.
AND last method resizing the image using the Trasform command. Allows you to resize parts of the photo, in particular objects located on separate layers. Let's say you're making a poster, you add clipart to it, and to change the size of the clipart, we need to use the Transform command. Called using commands from top menu Edit -> Transform -> Scale. Before calling these commands, you must do active layer, to which we will apply transformations.
A frame will appear around the edges of the image. Pull its edges or corners to resize it. If you want to maintain the proportions of the photo, then click on the “lock” in the command settings (under the main menu at the top of the program). The second way to maintain the aspect ratio is to hold down the Shift key when resizing. Press enter to complete editing.
Another similar tool is Free Trasform. Called through the Edit -> Free Transform commands or using hot Ctrl keys+ T. Unlike Scale, this command also allows you to rotate an object.
In the example shown in the screenshot below, the top layer containing the photo was scaled without maintaining the proportions. As a result, the photo turned out distorted and the background gray bottom layer became visible.
Bottom line: 4 main ways to resize an image in Photoshop:
- Image Size: Use precise numbers and units to resize your image.
- Canvas Size: increase or decrease the background size without changing the image size.
- Crop tool: Reduce the image size by removing part of the image.
- Tooltransformation: resizing individual parts of the image without changing the main size.
This article is a translation of the site + my additions and explanations.
When working in Photoshop, the question of changing the image size comes up every now and then: it is often necessary to reduce the size of the file, for example, for sending via e-mail, but there are times when it is necessary to increase the size of the image.
The parameters responsible for the image size can be changed in the Image/Image Size tab, which can also be called up by simultaneously pressing the Ctrl+Alt+I keys.
Image dimensions - width (Width) and height (Height) - Photoshop displays in pixels by default, but if the task is to reduce (increase) proportionally, you can set this parameter as a percentage.
The dimensions of the original image are taken as 100%; if you need to reduce the image, manually enter a number less than 100 into the percentage box; to enlarge it, more than a hundred. When resizing to a specific number of pixels, enter the desired length or width using the keyboard in the same way.
Why "or"? The thing is that these parameters are connected, as indicated by the icon in the form of chain links on the right, and when the width changes, the length changes proportionally and vice versa. If you really need to change only one of the parameters, uncheck the Constrain Proportions box; but keep in mind that the image will be distorted (stretched) with such a change. Other methods can be found http://www.cyberforum.ru/radionics/.
When dealing with raster images, you need to keep in mind that in any case, when changing the size of the image, its quality is lost, but how much (visible to the human eye or not) is a matter of high-quality and accurate conversion, as well as knowledge of the measure. Why is this happening? Raster image consists of colored dots (raster, pixels), if you zoom in on the image many times, you will see them as colored squares.
When determining the quality of a photograph, a concept such as Resolution is used - the number of pixels per unit length (width), usually inches or centimeters.
When reducing the image size, there will be fewer pixels per unit area, that is, Photoshop will simply remove the “extra” points. When enlarged, and even worse, the program “multiplies” one pixel into several of the same ones, because where can it get the missing ones? As a result, the image turns out somewhat blurry. What are the best ways to preserve quality as much as possible when resizing an image?
The developers of Photoshop built Interpolation (Resample Image) into the program - with its help, pixels close to the unknown are analyzed and, using mathematical calculations, the necessary (more precisely averaged) characteristics are selected. It is clear that when enlarging an image, it is logical to use the Bicubic Smoother option, and when reducing it, it is logical to use Bicubic Sharper. But even this is not enough. An experienced photoshopper will tell you a practical secret - when resizing a photo, for minimal loss of quality, it is better to change it in several steps of 10% rather than immediately by 50% or more. If you often need to enlarge or reduce images, it is better to download or record an action yourself that resizes the photo in one direction or another by 10%. At the same time, do not forget to use interpolation.
And after resizing you will almost always need to add a little sharpening. This can be done, for example, using the Sharpness filter (Filter/Sharnen/Sharpen).
One of the fundamentals of working in graphic editor is the ability to resize the edited image. It is this technique that I want to describe in today’s article, because knowledge of basic skills is necessary when further studying such a serious program as AdobePhotoshop.
So, first of all, open our drawing. After this we will need a tab Image. There we select the item Image Size.
A window will appear in front of us in which we will change the size of the picture.
Please note that there are two fields in the size settings - these are Dimension And Print size. What is the difference between them? The print size reflects the width and height of the printed document, that is, when sent to the printer, we will receive, in this case, an image on paper measuring 20.11 x 14.66 cm with a resolution of 72 pixels/inch. But what happens if we change the resolution to 300 pixels/inch? In this case, the size of the printed print will not change, but will change Dimension. Now it is 2375 x 1708 pixels.
I'll explain what happened. Photoshop, using its algorithms, expanded the image to a resolution of 300 pixels/inch, adding several hundred pixels there.
It is clear that this will not improve the quality of the drawing, that is, the image will become cloudy. But compared to, say, Paint, Photoshop does a much better job of smoothing out the pixels. In the picture on the left is an icon enlarged 10 times with Help Paint, on the right – using Photoshop.
Just in case, let me remind you that when you reduce the image, the quality of the picture also noticeably decreases, as when you enlarge it. Therefore, you should not get too carried away with this tool. The exception is working with vector graphics. In this case, you can change Dimension whatever you want, the image quality will not suffer.
Another interesting tool in Photoshop is Canvas size. This tool also allows you to influence the size of the image. With its help, you can either cut off part of the picture from any side, or, conversely, add a few pixels.
For example, we have this image, 120 x 80 pixels in size.
From it we want to get an icon measuring 64 x 64 pixels. Let's use the tool Canvas size. To do this, select from the menu Image paragraph Canvas size.
In the window that appears, you need to indicate what size image in pixels (mm, percentage, inches) we want to receive. Use arrows to indicate which side you want to remove or add pixels from.
As a result, we get an icon of the size we need.
That's all. I think that this article will be useful to everyone who is starting to get acquainted with Adobe program Photoshop.
Loading...
