What is a Pixel and Why Does It Matter?
Pixels are everywhere in the digital world. They are the building blocks of images, videos, games, websites, and more. But what exactly is a pixel and how does it work? In this article, we will explore the definition, examples, and applications of pixels, as well as compare them with vector graphics and pixel art.
Pixel Definition and Examples
A pixel is a short term for picture element. It is the smallest unit of a digital image or graphic that can be displayed and represented on a digital display device, such as a computer monitor, smartphone screen, or TV.
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Pixel as a Picture Element
A pixel is represented by a dot or square on a display screen. Pixels are combined to form a complete image, video, text, or any visible thing on a computer display. Each pixel has a unique logical address, a size of eight bits or more, and the ability to project millions of different colors.
For example, this image shows an image with a portion greatly enlarged so that individual pixels, rendered as small squares, can easily be seen.
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Pixel as a Unit of Measurement
A pixel is also used as a unit of measurement for digital images. The number of pixels is calculated by multiplying the horizontal and vertical pixel measurements. For example, HD has 1,920 horizontal pixels and 1,080 vertical pixels, which totals 2,073,600. It's normally shown as 1920 x 1080 or just as 1080p.
The pixel resolution also determines the quality of display; more pixels per inch of monitor screen yields better image results. For example, a 2.1 megapixels picture contains 2,073,600 pixels since it has a resolution of 1920 x 1080.
Pixel as a Color Value
A pixel is also used to describe the color value of each dot or square on a display screen. The color of each pixel is determined by the specific blending of the three main components of the RGB color spectrum: red, green, and blue. Depending on the color system, a different number of bytes can be allocated for specifying each color component of the pixel. For example, in 8-bit color systems, only one byte is allocated per pixel, limiting the palette to just 256 colors. In the common 24-bit color systems used for nearly all PC monitors and smartphone displays, three bytes are allocated, one for each color of the RGB scale, leading to a total of 16,777,216 color variations.
Pixel Graphics vs. Vector Graphics
Pixels are not the only way to create digital graphics. There is another type of graphics called vector graphics, which use mathematical formulas to define shapes, curves, lines, and colors instead of pixels. Vector graphics are scalable without losing quality, unlike pixel graphics which become blurry or jagged when enlarged or reduced.
Advantages and Disadvantages of Pixel Graphics
Advantages
Disadvantages
Rich in both color and brightness gradation
Scaling is associated with losses of quality
Each and every individual pixel can be edited
Compression can lead to losses of quality
Suitable for complex and realistic images
High memory consumption
Advantages and Disadvantages of Vector Graphics
Advantages
Disadvantages
Scalable without losing quality
Limited in color and brightness gradation
Compression does not affect quality
Editing individual elements can be difficult
Suitable for simple and abstract images
Not compatible with some devices and formats
Pixel Art and Its Applications
Pixel art is a form of digital art that uses pixels as the main medium of expression. Pixel art is created by manipulating individual pixels on a grid, usually with a limited color palette and low resolution. Pixel art is often associated with retro video games, but it has also been used for other purposes, such as web design, animation, and illustration.
What is Pixel Art and How to Create It
Pixel art is a style of art that emphasizes the pixel as the basic unit of composition. Pixel art can be seen as a form of pointillism, where small dots of color are used to create an image. Pixel art can also be seen as a form of mosaic, where small tiles of color are arranged to form a pattern.
To create pixel art, you need a pixel art editor, which is a software that allows you to draw and edit pixels on a grid. Some popular pixel art editors are Aseprite, Piskel, Pixilart, and Pixelorama. You can also use general-purpose graphics software, such as Photoshop or GIMP, but you need to adjust the settings to work with pixels.
Pixel Art Tools and Resources
If you want to learn more about pixel art and how to create it, there are many tools and resources available online. Here are some of them:
: A website that offers pixel art tutorials, palettes, tools, and galleries.
: A community of pixel artists that showcases pixel art, hosts challenges, and provides feedback.
: An online course that teaches you how to make pixel art from scratch.
: A subreddit dedicated to pixel art, where you can share your work, ask for advice, and find inspiration.
: A Twitter account that posts daily pixel art prompts and features the best submissions.
Pixel Art Examples and Inspiration
To give you some ideas of what pixel art can look like, here are some examples of pixel art from different genres and styles:
- Fantasy:
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- Sci-fi:
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- Horror:
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- Abstract:
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Conclusion and FAQs
Pixels are the basic units of digital images and graphics. They can be used to describe the picture element, the unit of measurement, or the color value of each dot or square on a display screen. Pixels can also be used to create pixel art, which is a form of digital art that uses pixels as the main medium of expression.
In this article, we have learned what pixels are, how they work, how they differ from vector graphics, and how they can be used for artistic purposes. We hope you have enjoyed reading this article and learned something new about pixels.
If you have any questions about pixels or pixel art, here are some FAQs that might help you:
What is the difference between a pixel and a voxel?
A voxel is a A voxel is a short term for volume element. It is the three-dimensional equivalent of a pixel, meaning it is the smallest unit of a digital image or graphic that can be displayed and represented in three dimensions. Voxels are often used for 3D modeling, rendering, and simulation.
How many pixels are in an inch?
There is no definitive answer to this question, as the number of pixels per inch (PPI) depends on the resolution and size of the display device. For example, a 27-inch monitor with a resolution of 1920 x 1080 has a PPI of about 82, while a 5-inch smartphone with the same resolution has a PPI of about 440. The higher the PPI, the sharper and clearer the image.
How can I convert pixel graphics to vector graphics?
There are two main ways to convert pixel graphics to vector graphics: tracing and redrawing. Tracing is the process of using a software tool to automatically or manually trace the outline of the pixel graphic and create a vector graphic based on it. Redrawing is the process of recreating the pixel graphic from scratch using vector shapes and tools. Both methods have their pros and cons, depending on the complexity and quality of the original pixel graphic.
What are some examples of pixel art games?
Pixel art games are video games that use pixel art as their main visual style. Pixel art games are often inspired by retro games from the 8-bit and 16-bit era, but they can also have modern features and mechanics. Some examples of pixel art games are:
: A farming simulation game where you can grow crops, raise animals, explore dungeons, and interact with other characters.
: A platforming game where you have to climb a mountain while overcoming various obstacles and challenges.
: A side-scrolling action game where you play as a knight who uses a shovel as his weapon and tool.
: A role-playing game where you can choose to befriend or fight the monsters you encounter in an underground world.
: A sandbox game where you can build, mine, craft, and explore a pixelated world.
How can I improve my pixel art skills?
Like any other skill, pixel art requires practice, patience, and feedback. Here are some tips to help you improve your pixel art skills:
Study the basics of art, such as color theory, composition, perspective, lighting, and shading.
Analyze and learn from other pixel artists, especially those who have a similar style or genre as yours.
Use references and sketches to plan your pixel art before you start drawing.
Start with simple shapes and objects, and gradually move on to more complex ones.
Use a limited color palette and avoid using too many colors or gradients.
Use contrast and dithering to create depth and texture.
Use anti-aliasing and sub-pixeling to smooth out jagged edges and curves.
Experiment with different tools and techniques, such as mirroring, rotating, scaling, flipping, etc.
Get feedback from other pixel artists or online communities, and be open to criticism and suggestions.
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