Graphic Designer Helper
SVG, Png Assistance, Logo creation or reproduction. Basic svg art conversions and clean up start at $10. Charged out at $10 / half hour. Projects and prices are subject to complexity after review.
Let’s Get crafty! Not sure where to start? Don’t worry . . we can clean up your design for you!
Bitmap images vs Vector images
What’s the difference between JPG, PNG, GIF images and SVG, EPS, PDF, AI files?
Vector images consist of shapes like circles, rectangles, lines and curves, while bitmap images, also known as raster images, consist of a grid of pixels. Vectorization or tracing is the process of taking a bitmap image and re-drawing it as a vector image.
The shapes in vector images allow computers to do things that cannot be done with bitmap images, like scale them to any size without loss of quality and using them to e.g. cut, sew, paint, and laser engrave.
Grid – Pixels
Underlying shapes – Vector image
Bitmap image file formats
There is a large number of different bitmap formats. Some of the most common are: JPEG, PNG, GIF, BMP, and TIFF. Broadly speaking, they fall into two categories:
- Lossy formats
- These have smaller file sizes but do not store a perfect copy of the image. They are best suited to photographs and other images where perfect accuracy is not important. They are also commonly used on the web to save bandwidth.
- One of the most widely-used image formats. It has excellent compression characteristics and has the nice feature that the user may specify what level of compression they desire, trading off fidelity for file size.
We do not recommend using JPEG files for rasterized vector art, as the compression artifacts substantially degrade the quality of the image near edges.
- Lossless formats
- These store an exact pixel-by-pixel representation of the image, but require more space. They are more suitable for things like logos.
- The best of the lossless image formats is called PNG (Portable Network Graphics). This format is widely supported by web browsers and image viewers/editors.
Vector Magic recommends using the PNG format when storing logos as bitmaps.
Vector image file formats
- Adobe’s EPS format (Encapsulated PostScript) is perhaps the most common vector image format. It is the standard interchange format in the print industry. It is widely supported as an export format, but due to the complexity of the full format specification, not all programs that claim to support EPS are able to import all variants of it. Adobe Illustrator and recent versions of CorelDRAW have very good support for reading and writing EPS. Ghostview can read it very well but does not have any editing capabilities. Inkscape can only export it.
- The W3C standard vector image format is called SVG (Scalable Vector Graphics). Inkscape and recent versions of Adobe Illustrator and CorelDRAW have good support for reading and writing SVG. Further information on the SVG format may be found on the official SVG website.
- Adobe’s PDF format (Portable Document Format) is very widely used as a general purpose platform-independent document format. And while it is not exclusively used as such, it is also a very good vector image format. Adobe gives away the Acrobat PDF reader, but sells the tools required to create PDF files (third party tools that perform the same task are also for sale). Those tools work with any program that is able to print. Support for reading and editing PDF files is much more limited.
- The native format of Adobe Illustrator is the AI format (Adobe Illustrator Artwork), a modified version of the older EPS format. The AI format is fairly widely supported, but is less ubiquitous than the EPS format, and most programs that read AI can also read EPS.
There are numerous other vector formats: CDR is the CorelDRAW native format and XAR is the Xara Xtreme native format, to name a couple.