How do you change resolution of image?
montygm
Posts: 36
I notice in Photoshop when I open up Daz images I rendered they are all showing up at 72 pixels only! Even though I set image quality on 2 and sharpness on 1 and have my render size usually set between 2500x 2500 to 3000x3000 on average which gives me quite a large image but without much clarity. Why is my image Resolution still so small and how do I change it to make images clearer and sharper looking without having to make such a big looking file which at present isnt very sharp?
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You could try setting the pixel filter to mitchel or lanczos and or lower the pixel filter radius. I prefer mitchel at 1.1 personally.
The 72 pixel resolution is the resolution of your screen which is what PS shows unless you have specified a particular one when you saved it. It doesn't realy mean anything.
https://www.scantips.com/no72dpi.html
72 is just screen resolution. If you are planning on printing use the Image Size command to speify the dpi for printing.
This is the answer you're looking for. Lanczos anti-aliasing sampling filter should give you great results without blurring the image at all. I personally don't use a pixel filter size larger than 1, as long as the resolution is high enough you shouldn't get much aliasing at all (and blurring at render time doesn't make much sense because you lose detail that you can't get back).
DPI resolution doesn't matter at all unless you'll print the image, 72dpi is fine.
Remeber that the PPI is just a number at the front of the image file saying how big the pixels are "at actual size". DS doesn't set it to 72, it is left blank and your editor/viewer assigns a number (usually either 72 or 96). A pixel is a square of colour, for DS renders having any one of 16 milion colours (unless it's from an Iray canvas in which case the .exr format retains greater colour depth) and there is no difference between a 300PPI pixel and 1PPI pixel as far as quality goes, just n how large an image of a given pixel dimension would be.
Very new to DS as a hobbyist- sorry for what is perhaps a basic question... So if I plan to print some of my artwork on a medium like Displate which requires a file with "minimum resolution of 300dpi", is that defined post-DS render in something like Photoshop? When I render my image in DS and then open the file in my viewer on my monitor it shows "96dpi" as you mentioned, but the image is quite large. My rendered image has 1:1.41 aspect and a short side of 3000pixels. How would I 'increase' the dpi so that it will meet the requirements of file submission for printing on a Displate (in this case)? Is it just done by scaling the image down to meet the 300dpi requirement?
Multiply the finished image size you want for printing by 300 and render your image to those dimensions.
A 10 inch by 10 inch print would need to be 300x10 which would be 3000 pixels by 3000 pixels, or more. A 12x10 inch print would be 3600x3000 pixels etc.
Thanks Fishtales! I was hoping it was just that easy, but I'm new to rendering and wasn't sure it would work that logically.
I did look through the link(s) you provided earier and that led me to suspect it was as straight forward as you just said. The files I will be submitting for printing call for a min short side of 2900 pixels and a min res of 300dpi. Looking at the end product of the printing, dimensionally speaking, what you said makes perfect sense. Thanks for the clarity! Much appreciated.
So basically there is no way of changing the 72 image size DPI at all then in Daz Iray?
The 72 is NOT the image size and the dpi/ppi setting within D|S is an utterly irrelevant number. Go to your printer settings and tell the printer directly at what ppi you want your image printed.
Studio doesn't add any DPI to an image. The ones I save and open in IrfanView have a DPI of 106 because that is the screen resolution set on my Laptop. If you are seeing 72 then that is the resolution of your screen. If you want to print the renders at 300 DPI then you multiply the printed size by 300 so a 12x10 print would be rendered at 3600x3000, a 24x20 inch would be 7200x6000 anything bigger than that could be printed at a lower DPI, say 240, which would mean the 7200x6000 render could be printed up to 30x25 inches, or at 4DPI and get a poster at 1800x1500 inches or 150x125 feet
That is outdated advice. There are a number of printing applications and plugins that can interpolate data to print larger WITHOUT loss of clarity / detail. Been doing it for years and printing up to 17x22 for years w 3000 x 2000 and 4000 x 6000 images. This won't apply for a commercial shop.
Outdated or not it still works for me and has done or nearly thirty years
Lets make this understandable, dpi is NOT saved with most image formats, so it defaults to whatever your image editors default setting is. IGNORE it.
Your screen resolution is probably 96 dpi.
.tif does save the dpi, but you probably won't ever use .tif in rendering, and then it wouldn't matter what the dpi was to the renderer.
If your going to render images at that size, your going to need to leave it a week to render, even on fast gpus that might take 12 hours to make a good image.
If your filter in render settings is still default it will be gaussian at 1.5, which is ok ish, i set mine to mitchell at .98 for cleaner renders.