What Are Graphics and How Do Vector and Raster Formats Differ?
Graphics are any visual content you create, edit, or display on a screen or in print. The single most useful distinction is between vector graphics, which store shapes as mathematical paths and stay sharp at any size, and raster graphics, which store a grid of pixels and lose quality when enlarged. Choose vector for logos, icons, diagrams, and anything that must scale or be edited as shapes; choose raster for photographs and detailed continuous-tone images. Inkscape is a professional vector graphics editor that runs on Linux, macOS, and Windows and works natively with the SVG format.
Vector graphics: paths and equations
A vector image describes shapes rather than pixels. A circle is stored as a center point, a radius, and a fill; a curve is stored as a path with anchor points and control handles. Because the file holds instructions instead of a fixed grid, the renderer recalculates the image at whatever size you ask for.
What this means in practice:
- Scales without loss. The same file can produce a favicon or a billboard with no blurring or jagged edges.
- Editable as objects. You can select a single shape, change its color, move it, or reshape it without touching the rest.
- Usually small files for flat artwork, since a few numbers describe a lot of area.
- Best for: logos, icons, illustrations, charts, maps, typography, technical diagrams, and cut files for plotters or vinyl cutters.
Inkscape is built around this model and uses SVG (Scalable Vector Graphics) as its native document format, an open XML-based standard.
Raster graphics: pixels
A raster image is a rectangular grid of pixels, each holding color values. A 1000×1000 pixel image contains one million pixels. The grid is fixed at the moment of capture or export.
- Resolution-bound. Enlarging past the original pixel dimensions forces the software to invent pixels, producing blur or blockiness.
- Rich in tone. Every pixel can hold its own color, which is why photos, scans, and painted textures live here.
- File size grows with dimensions and detail, not with the number of distinct shapes.
- Best for: photographs, scanned artwork, screenshots, digital painting, and web images at a known display size.
Comparing the common formats
| Format | Type | Typical use | Notes |
|---|---|---|---|
| SVG | Vector | Logos, icons, web graphics, diagrams | Open XML standard; Inkscape's native format; scales cleanly |
| PNG | Raster | Web images, screenshots, transparency | Lossless; supports alpha transparency |
| JPEG | Raster | Photographs | Lossy compression; no transparency |
| Can hold both | Print, documents, sharing | Often preserves vector paths when exported from vector software |
A practical consequence: exporting an SVG logo to PNG at 200 px wide gives you a raster file that will blur if someone later needs it at 2000 px. Keeping the SVG as the master avoids that.
How to choose for a real project
Work through these questions:
- Will it need to scale? If yes, vector. A logo on a business card and on a building sign is one SVG.
- Is it a photograph or a scan? Raster. There is no meaningful vector description of a photo's grain and gradients.
- Will you edit individual shapes later? Vector. Moving a label in a diagram is trivial in vector, painful in raster.
- Is it destined for print? Vector for logos, type, and line art; raster at sufficient resolution for photos.
- Is it for the web? SVG for icons and UI elements, PNG or JPEG for photographic content.
A concrete example
Suppose you are making a poster. The headline text, the logo, and the geometric background are all vector elements — they stay crisp whether the poster is printed at A4 or at A0. A photograph placed on that poster is raster, and it needs enough pixels for the final print size. In Inkscape you would build the vector parts as paths and text, then place the photo as a linked or embedded raster image. The document itself remains an SVG, and you can export to PDF or PNG when you are done.
Where Inkscape fits
Inkscape is a vector graphics editor, so it is the right tool when your work is shape-based: drawing paths, arranging objects, setting type, and producing SVG. It is not a photo editor; for pixel-level retouching you would use a raster tool and then bring the result into your vector document if needed. Because it runs on Linux, macOS, and Windows and centers on an open standard, files stay portable between tools that read SVG.