Modify pixels - this is how you edit digital images
Changing images at the pixel level is the job of image editing programs. In addition to changing formats, there are numerous other ways to edit pixels.
How to change formats and resolutions
- The resolution and size of digital images is expressed in pixels; H. individual pixels, via which - depending on the file format - various information is saved. You can view the. From various output devices, web browsers, digital picture frames and monitors pictures display.
- The standard image resolution for web images is 72 dpi. Different digital devices have displays with different resolutions, which can also display higher-resolution images with a finer pixel grid. For high-quality printing, you need a resolution of 300 dpi.
Editing pixels in a variety of ways - this is how it works
- With an image editing program you can change the size, format or other values of pixel-based digital images. A professional software solution that serves as a professional standard is called Photoshop. A test version that can be used free of charge for 30 days is available after registration on the manufacturer's website. In contrast, there is a free alternative called GIMP. You can download this open source program free of charge from the developer's website.
- With Photoshop or GIMP you can easily change the dimensions and resolution of pixel images. In Photoshop you can do this under "Image> Image Size". You can either change the width and height of the pixel images proportionally or distort the images by entering other values.
- Under "Image> Workspace" you can change the dimensions of the image while keeping the pixels. After your input, the image appears either cut off if you choose a smaller format or with a border if you choose a larger work surface. Changing the "working area" is particularly useful if you have to work with fixed sizes.
- An image processing program provides you with numerous processing options with which you can also change the quality of pixels. Under "Filter" you can make changes, such as blurring. You can also make further setting options under "Image", such as "Color balance" or "Brightness & contrast".
- In the tool palette you will find tools with which you can edit smaller groups of pixels - for example the "stamp tool".
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