Blurry Textures

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    Jasper Mink

    Is there a specific reason you chose Photo-consistency based?

    The default value for this parameter is visiblity based. Perhaps changing this parameter will yield better results.

     

    Also, maybe someone else can shed light on this but generating the texture on a 16x16k texture file should yield sharper results?

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    Götz Echtenacher

    Hi Nick,

    nice screenshooting, very easy to get all neccessary details!  :-)

    I'm afraid there is no magic button.

    You could try and lower the texel size and see if that helps anything.

    But to be honest I don't think it will. RC provides more detail in the mesh but it also requires "better" input. My best bet is that your alignment is slightly off, which is a common cause for blurry texture. Afaik RC has a different way of creating the texture. Rather than cutting one triangle from one image, it creates each pixel from an average of all suitable cameras. And if those are slightly misaligned, then it is bound to be blurry.

    Jasper, with fixed texel size, there won't be any gain with a 16k texture map because RC will just use as many as it needs to fit all the pixels in there.

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    Jonathan_Tanant

    Maybe try to lower your max reprojection error until the components drops some images - try to find a sweet spot between 0.4 and 1 - 2 is maybe a bit too high.

    Your alignment time is pretty fast (less than 3min in high for 922 pictures), what resolution are you using ? are you using RAW pictures ? (there is some Win drivers issues that kills the resolution of the images in the DNG driver...)

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    Not_Nick

    Thanks for the suggestions/quick feedback. I've made a component that is just this area so I can churn out a few variations on it. Hopefully tightening the strings on the alignment will help. Will post up my results when I'm done.

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    Not_Nick

    So I managed to cycle through a few different settings. 

    Firstly I performed a new alignment with 0.1 reprojection error. Anything more than that didn't drop off any additional photos.

    Visability Based appears to give better results than Photo based.

     

    Then between linear or multi it seems linear gave the best result.

    Overall an improvement on what I had before however compared to the other results its still a few steps behind.

    I'm wondering if the other package does some sharpening to the texture afterwards? I threw in the RC screenshot into Lightroom and cranked up the sharpness. Seems to produce a similar result.

     

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    Götz Echtenacher

    Well, that was worth the effort! Thank you for sharing this!

    Now with a bit of tweaking you get even better results than your other package!

    I don't think that 0.1 is actually neccessary. DEVs say 1 should be enough for most cases. I tried with 0.5 once and to be honest I didn't see any difference any more. Even from 2 to 1 I didn't see much. I suspect that with 0.1 there will be a lot more images missing in the full image set, since mith more complexity more erros will be introduced. Which could be also the case why in your test it worked better - less complex, less errors...

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