Standard
Mar 6, 2025
Upscaling settings explained
Target Resolution sets the desired DPI for output images. Upscaling Threshold defines how much smaller an image must be before upscaling is applied (e.g. 1.2 = upscale if image is 20% or more below target DPI).
Target resolution
The Target Resolution defines the desired output resolution of images in your PDF (in DPI – dots per inch). This ensures the images meet the quality requirements for printing or high-res display.
Common values:
150 DPI – low quality, suitable for on-screen use
300 DPI – standard print quality
600–1200 DPI – high-end printing, fine detail
👉 Viesus compares the original image DPI against your selected target resolution. If it’s too low, it triggers upscaling.
Advanced: Upscaling Threshold
Upscaling Threshold sets the minimum factor by which an image must fall below the target resolution before it gets upscaled.
Factor 1.20 means:
If an image is less than 1.20× smaller than the target resolution, upscaling will be applied.
Example:
You choose 300 DPI as the target.
An image is currently 200 DPI.
Since 300 ÷ 200 = 1.5, which is above the 1.2 threshold, Viesus will upscale the image.
If the image is 260 DPI (≈ 1.15× smaller), it won’t be upscaled.
Why it matters
This gives you full control:
Set how sharp your output should be (Target DPI)
Prevent unnecessary upscaling (Threshold) when images are already close enough to the target
This ensures:
No wasted credits
No artificial sharpness
Consistent quality where it counts
Features
