Resolution is the amount of detail that an image file contains, or that an input, output, or display device is capable of producing. Resolution is measured in dpi (dots per inch) or ppi (pixels per inch). Low resolutions can result in a grainy appearance; high resolutions can produce higher quality images but result in larger file sizes. Whether you are planning to print your artwork to your desktop printer or use it on the web, keep the following considerations in mind to ensure that the finished image appears as intended.
Upsampling adds more pixels to an image. Corel PHOTO-PAINT lets you enlarge images without losing quality and detail. You can choose from several upsampling modes to suit your needs. The Bicubic method adds new pixels between existing pixels and interpolates them based on the colors of neighboring pixels. This method produces smooth tonal gradations. The Nearest neighbor method replaces every pixel with the nearest pixel in the upsampled image, which results in multiple pixels of the same color. This method preserves sharp details, however, it can also produce jagged edges instead of smooth lines and curves. In addition, the application uses advanced machine learning techniques to upscale images by preserving clean edges, sharpness, and fine details. Based on the analysis of a large number of artistic images and photographs, the two artificial intelligence methods, Illustration and Photorealistic, use neural network algorithms to reduce noise and pixelation and maintain color. With its low-level blurring and sharpening techniques that create cartoon-like effects, the Illustration method is great for images such as logos, drawings, illustrations, and paintings created in graphic design software. The Photorealistic method works well for resizing photos.
Depending on your system hardware configuration, upsampling an image with the Illustration and Photorealistic methods can take from a couple of seconds to several minutes. When the estimated time to complete the operation exceeds 3 seconds, a progress bar appears to show the remaining time. You can cancel the upsampling process at any time.
Bicubic — uses bicubic interpolation that produces smooth tonal gradations. The new pixels, which are added between existing pixels, are interpolated based on the colors of neighboring pixels.
Nearest neighbor — replaces every pixel with the nearest pixel in the upsampled image, which results in multiple pixels of the same color. This method preserves sharp details, however, it can also produce jagged edges instead of smooth lines and curves.
Illustration — uses low-level blurring and sharpening techniques that create a more artistic effect. This method works well with images such as drawings, logos, and illustrations created in graphic design software.
Photorealistic — maintains sharp edges, areas with continuous color, textures, and fine details. This method is great for resizing photos.
When this check box is enabled, the pixels option in the Unit of measurement list box is grayed out because the total number of pixels in the image remains constant.
By default, the graphics processing unit (GPU) of your computer is used to upsample images. However, if your system’s GPU does not support CUDA or OpenCL (1.2 or higher) and is incompatible with Corel PHOTO-PAINT, you can set the application to use the central processing unit (CPU) instead by clicking Tools OptionsGlobal, clicking General, and disabling the Use GPU to accelerate upsampling option. For information about the Corel PHOTO-PAINT system requirements, see System requirements.
The Photorealistic and Illustration upsampling methods are supported only in the 64-bit version of CorelDRAW Graphics Suite.
If you resample an image using pixels as the unit of measure, the size of the image also changes.
The Identical values check box is grayed if the Maintain aspect ratio check box is enabled.
The features documented in the Help are available in the full version of CorelDRAW Graphics Suite 2020. Some features may not be available in this version of the product.
Resample.
