View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000225 | madVR | bug | public | 2014-07-09 18:25 | 2015-03-14 15:28 |
| Reporter | 6233638 | Assigned To | madshi | ||
| Priority | none | Severity | minor | Reproducibility | always |
| Status | closed | Resolution | fixed | ||
| Platform | x64 | OS | Windows 8.1 Pro | OS Version | 6.3 (Build 9600) |
| Summary | 0000225: Poor chroma quality when image doubling is used | ||||
| Description | Originally thought to be an issue specific to downscaling when NNEDI3 image doubling is active, it seems that chroma quality can suffer when NNEDI3 image doubling is used without also enabling chroma doubling at the same number of neurons. This is quite apparent with white text on a red background. | ||||
| Steps To Reproduce | 1. Enable NNEDI3 image doubling 2. Set luma scaling to Nearest Neighbor (happens with anything, this is most obvious) 3. Display an image with white text on a red background | ||||
| Additional Information | Visibility/severity seems to vary depending on the combination of scaling algorithms used. If 720p is being doubled to 1440p, then downscaled to 1080p, the effect can be quite pronounced. Original topic: http://forum.doom9.org/showthread.php?t=170769 I have had to recreate the original test image, as I no longer had a copy of it, and this one does not seem to show the problem as clearly for some reason. As I see it, the main issue here is that enabling both luma and chroma doubling can be quite GPU intensive for little benefit other than avoiding this artifact showing up in rare circumstances. Everything seems to be working correctly, it's just an unfortunate artifact that can sometimes appear from this combination of settings. (luma doubling without chroma doubling) | ||||
| Tags | No tags attached. | ||||
| madVR Version | 0.87.10 | ||||
| Media Player (with version info) | JRiver MC 19.0.149 | ||||
| Splitter (with version info) | LAV Splitter 62.0 | ||||
| Decoder (with version info) | LAV Video 62.0 | ||||
| Decoding | DXVA2 Copyback | ||||
| Deinterlacing | none (progressive) | ||||
| DXVA2 Scaling Active | no | ||||
| Aero / Desktop Composition | On | ||||
| Problem occurs with mode | all modes | ||||
| GPU Manufacturer | NVidia | ||||
| GPU Model | GTX 570 | ||||
| GPU Driver Version | 337.88 WHQL | ||||
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2014-07-09 18:25 | 6233638 | New Issue | |
| 2014-07-09 18:25 | 6233638 | File Added: marlins-vs-rangers.png | |
| 2015-03-14 15:28 | madshi | Note Added: 0000743 | |
| 2015-03-14 15:28 | madshi | Status | new => closed |
| 2015-03-14 15:28 | madshi | Assigned To | => madshi |
| 2015-03-14 15:28 | madshi | Resolution | open => fixed |
