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AI image upscaling enlarges an image while predicting additional detail. On Oakgen's Image Upscaler, the current workflow uses Topaz Upscale, a 1–4x scale factor, eight enhancement modes, face enhancement controls, and JPEG or PNG output. The useful result is a larger image whose important details still match the source.
If your destination is a physical print, start with our guide to upscaling AI images for print. It covers the target dimensions, cropping, and printer checks. This article explains the general upscaler controls and how to review an output.
Checked October 7, 2026: This walkthrough reflects Oakgen's exposed controls and fal's Topaz documentation. It is not a speed benchmark or a guarantee of faithful detail recovery. The provider's documentation includes settings that Oakgen does not currently expose.
What 4K means for your source
The scale factor multiplies width and height. It does not promise a fixed output size independent of the upload.
| Starting dimensions | Selected factor | Nominal output dimensions |
|---|---|---|
| 512 × 512 | 4x | 2048 × 2048 |
| 600 × 400 | 4x | 2400 × 1600 |
| 1024 × 1024 | 4x | 4096 × 4096 |
| 1920 × 1080 | 2x | 3840 × 2160 |
These are dimension calculations, not generated test results. A square 4096 × 4096 image and a 3840 × 2160 video frame have different shapes even though people may call both “4K.” Record your destination's actual pixel requirements.
Larger dimensions also do not prove that new texture is correct. An enhanced face can look sharp while changing the person's features. A product label can look readable while saying the wrong thing. Review content separately from size.
Choose a Topaz enhancement mode
The Image Upscaler retains one selectable model, with these eight enhancement modes. Use the table as a starting point, then judge the result against your own source.
| Mode | Starting use case | Detail to inspect |
|---|---|---|
| Standard V2 | General photographs | Edges, texture, and unintended smoothing |
| High Fidelity V2 | Photos where existing detail matters | Fine texture, grain, and small features |
| Low Resolution V2 | Small or compressed sources | Invented detail and compression patterns |
| CGI | Rendered graphics and digital art | Linework, gradients, and repeated shapes |
| Text Refine | Images containing text and shapes | Every important character and symbol |
| Recovery | Very low-detail images | Whether reconstruction changes the subject |
| Recovery V2 | Another recovery option for degraded sources | Identity, texture, and factual detail |
| Redefine | An interpretive enhancement candidate | Added detail that was absent from the source |
The use cases reflect provider descriptions, not a side-by-side Oakgen quality test. For a real product, recognizable person, or exact artwork, start conservatively. Recovery modes and interpretive results need particularly careful checking.
Do not look for a general Creativity or Resemblance slider in this workspace. Oakgen's exposed controls are enhancement mode, scale factor, output format, face enhancement, face enhancement strength, and subject detection. Some additional settings described by the provider are not available here.
Enlarge One Image and Check the Details
Choose Topaz settings for your source, review the charge, and compare the result with the untouched original.
Step by step: upscale an approved image
Repair the source when needed
Choose a repair workflow for the defect you can actually see:
- Photo Restoration offers scratch repair, full restoration, colorization and face enhancement directions for an uploaded image.
- Photo Noise Reduction offers light, medium and strong denoising directions for a grainy source.
- Compression Artifact Removal targets the blocky or smeared appearance of a compressed image.
- Face Restoration focuses the edit on facial detail, with subtle, medium and strong enhancement choices.
Use only the pass your source needs and compare it with the original before upscaling. These generative edits can invent or alter detail; a cleaner-looking face, label or texture is not evidence that lost information has been recovered accurately.
1. Choose the best source
Use the original export or camera file where possible, rather than a screenshot of a compressed preview. Keep an untouched copy for comparison. If the content already has a wrong label, extra finger, or damaged illustration, increasing its size is not an approval process for that error.
Make necessary composition or scene edits in the Image Editor first. Review those edits, then upscale the approved version. Compare the final result with both the edited source and any original reference whose details must survive.
2. Upload and select the mode
Open the Image Upscaler, upload your source, and choose an enhancement mode. Standard V2 is a reasonable initial experiment for a general photo. Use the table above to identify a more specific candidate when the source contains graphics, tiny details, or text.
Change one setting at a time if the first result fails. Switching mode, factor, and face settings together makes it harder to understand what helped.
3. Select the needed scale factor
Oakgen exposes integer factors from 1 to 4. Use 1x when trying enhancement without enlargement; use a larger factor when the destination requires more pixels. Choose the smallest sufficient factor rather than automatically selecting 4x.
If even 4x cannot meet the target dimensions, revisit the source or the destination. Repeated processing can add more interpretation without restoring information that was never captured. For print-specific calculations, use the print-preparation worksheet.
4. Review face and advanced settings
Face Enhancement is enabled by default. For portraits, compare results with it enabled and disabled if identity changes. Its strength is adjustable from 0 to 1, with a default of 0.8. A stronger-looking face is not necessarily a more faithful face.
Advanced controls include Subject Detection with All, Foreground, or Background choices, and Output Format with JPEG or PNG. Keep settings recorded beside the accepted file so you can distinguish experiments later.
5. Check the charge, generate, and download
Review the displayed charge before submitting; the selected factor can affect it. This guide does not use a fixed credit quote or guaranteed completion time. Download the full output and confirm its actual dimensions rather than judging only the preview.
Approve detail at full size
Inspect at 100% and compare against the untouched source. For a large image, move through several regions rather than checking only the center.
| Image type | Acceptance check | Reject when |
|---|---|---|
| Portrait | Compare eyes, teeth, skin, hairline, and facial shape | Identity or expression changes |
| Product | Compare color, geometry, hardware, and labels | The image depicts a different item or feature |
| Illustration | Follow linework and repeated motifs | Lines merge, shapes drift, or elements appear |
| Text or logo | Read every character and inspect contours | Wording, numbers, or brand shapes change |
| General photo | Inspect borders, texture, shadows, and background | Halos, invented patterns, or distracting smoothing appear |
Then check the destination-size version. A file that looks impressive while zoomed out may reveal artifacts at full size; a technically sharp file may still have the wrong crop for its placement.
For product artwork, our guide to preserving logos and labels provides a stricter source-comparison checklist. Keep the original logo or artwork when exact reproduction is essential.
Common mistakes
Trying to recover information that is absent. Predictions can be plausible, but they are not evidence of what the original scene contained. Treat uncertain recovered detail as interpretation.
Upscaling every draft. Approve content first. Enlarge the candidate you actually intend to use rather than processing discarded versions.
Using output dimensions as the only quality test. Pixel count cannot certify identity, lettering, or product accuracy.
Assuming enlargement completes print preparation. Your printer may require a particular crop, profile, bleed, or file setup. Handle those requirements in an appropriate external editor and order a proof where needed.
Frequently asked questions
Can Oakgen upscale every image to 4K?
No. Oakgen's current Topaz workspace exposes a 1–4x scale factor. A 1024-pixel-wide source becomes 4096 pixels wide at 4x, while a 512-pixel-wide source becomes 2048 pixels wide. Calculate both output dimensions and inspect the detail before approving the result.
Which upscaler is available on Oakgen?
As checked on October 7, 2026, the Image Upscaler retains Topaz Upscale. It exposes eight enhancement modes within that model. Older descriptions of separate Clarity and Crystal upscalers do not describe the current workspace.
Does Text Refine guarantee accurate lettering?
No. Text Refine is a mode to try for text and shapes, but you still need to compare every important character with the source. Reject changed wording, numbers, symbols, or letter shapes. Use original artwork when exact lettering is required.
Is a 4x upscale ready to print?
Only if it meets your actual printer's requirements and passes detail review. Physical size, required resolution, cropping, color, and bleed can affect preparation. Oakgen's verified upscaler controls do not include a complete print-production workflow.
Try a Controlled Topaz Upscale
Start with an approved source, select the required enlargement, and keep the original beside the output for review.
