Как изменить размер изображения крита

Raster Data¶

This is the main data on the paint layers you make. So these are the
strokes with the paint brush and look pixelated up close. A multi-layer
file will contain several of such layers, that get overlaid on top of
each other so make the final image.

A single layer file will usually only contain raster data.

Vector Data¶

These are mathematical operations that tell the computer to draw pixels
on a spot. This makes them much more scalable, because you just tell the
operation to make the coordinates 4 times bigger to scale it up. Due to
this vector data is much more editable, lighter, but at the same time
it’s also much more CPU intensive.

Operation Data¶

Stuff like the filter layers, that tells Krita to change the colors of a
layer, but also transparency masks, group layer and transformation masks
are saved to multi-layer files. Being able to load these depend on the
software that initially made the file. So Krita can load and save
groups, transparency masks and layer effects from PSD, but not load or
save transform masks.

DPI/PPI¶

DPI stands for Dots per Inch, PPI stands for Pixels per
Inch. In printing industry, suppose if your printer prints at 300
DPI. It means it is actually putting 300 dots of colors in an area
equal to an Inch. This means the number of pixels your artwork has in a
relative area of an inch.

DPI is the concern of the printer, and artists while creating
artwork should keep PPI in mind. According to the PPI you have
set, the printers can decide how large your image should be on a piece
of paper.

Some standards:

72 PPI

This is the default PPI of monitors as assumed by all programs. It
is not fully correct, as most monitors these days have 125 PPI or
even 300 PPI for the retina devices. Nonetheless, when making an
image for computer consumption, this is the default.

120 PPI

This is often used as a standard for low-quality posters.

300 PPI

This is the minimum you should use for quality prints.

600 PPI

The quality used for line art for comics.

Color depth¶

We went over color depth in the Color Management page. What you need to
understand is that Krita has image color spaces, and layer color spaces,
the latter which can save memory if used right. For example, having a
line art layer in grayscale can half the memory costs.

Image color space vs layer color space vs conversion.¶

Because there’s a difference between image color space and layer color space, you can change only the image color space in which will leave the layers alone. But if you want to change the color space of the file including all the layers you can do it by going to this will convert all the layers color space as well.

Setting the canvas background color¶

You can set the canvas background color via menu item. This allows you to turn the background color
non-transparent and to change the color. This is also useful for certain file
formats which force a background color instead of transparency. PNG and
JPG export use this color as the default color to fill in transparency
if you do not want to export transparency.

If you come in from a program like Paint Tool SAI, then using this
option, or using As canvas color radio button at Background:
section in the new file options, will allow you to work in a slightly more comfortable
environment, where transparency isn’t depicted with checkered boxes.

Basic transforms¶

There are some basic transforms available in the Image menu.

Shear Image…

This will allow you to skew the whole image and its layers.

Rotate

This show a submenu that will allow you to rotate the image and all its layers quickly.

Mirror Image Horizontally/Vertically

This will allow you to mirror the whole image with all its layers.

But there are more options than that…

Trimming¶

Using , Krita resizes the
image to the dimensions of the layer selected. Useful for when you paste
a too large image into the layer and want to resize the canvas to the extent
of this layer.

is a faster cousin to the crop
tool. This helps us to resize the canvas to the dimension of any active selection.
This is especially useful with right-clicking the layer on the layer stack and
choosing Select Opaque.
will then crop the canvas to the selection bounding box.

is actually for layers, and will trim all
layers to the size of the image, making your files lighter by getting
rid of invisible data.

Resizing the image¶

Scale Image to New Size… allows you to resize the whole image. Also,
importantly, this is where you can change the resolution or upres your
image. So for instance, if you were initially working at 72 PPI to block
in large shapes and colors, images, etc… And now you want to really get
in and do some detail work at 300 or 400 PPI this is where you would make
the change.

Like all other dialogs where a chain link appears, when the chain is
linked the aspect ratio is maintained. To disconnect the chain, just click
on the link and the two halves will separate.

Separating Images¶

This powerful image manipulation feature lets you separate an image into
its different components or channels.

This is useful for people working in print, or people manipulating game
textures. There’s no combine functionality, but what you can do, if
using colored output, is to set two of the channels to the addition
Blending Modes.

For grayscale images in the RGB space, you can use the Copy Red, Copy
Green and Copy Blue blending modes, with using the red one for the red
channel image, etc.