-
1. Re: How do I change picture resolution from screen capture?
Stan Jones Jan 11, 2011 5:24 PM (in response to zorrocbr)What is the purpose of the image? If for print, that is one thing. If to display on a computer, the dpi is meaningless - only the pixel resolution is important.
-
2. Re: How do I change picture resolution from screen capture?
zorrocbr Jan 12, 2011 6:29 AM (in response to Stan Jones)Yes, the image is for printing on the box cover of my DVD.
-
3. Re: How do I change picture resolution from screen capture?
Stan Jones Jan 12, 2011 6:41 AM (in response to zorrocbr)SD video just does not have the resolution for such a purpose, so you have to look at what quality you can get by uprezing. (Someone will make a recommendation on the program, whose name I forget, that may help.) I use source footage, not a screen capture, and work with in photoshop. Because there is a resolution problem, I have used composite pictures for this purpose.
Regarding your specific question, the dpi of the screen capture is not relevant: set your screen to maximize what you want in the frame, then capture (you get the resolution of the screen). In photoshop, see what dpi you have when you adjust the image to the print size you want. Then see if you can push it to be suitable.
-
4. Re: How do I change picture resolution from screen capture?
Bill Hunt Jan 12, 2011 10:11 AM (in response to zorrocbr)What is the exact source footage, that you wish to do a screen-cap of?
If it's, say a Menu, use the PSD and up-rez in PS. I would possibly stair-step, if the quality is not adequate. This is done by incrementally doing Image Size, with Resample checked. From 72 ppi to 100 ppi should not degrade the image that badly, and you will want to explore Bicubic Smoother, and also Bicubic Sharper, as, depending on the image, one might prove better, than the other.
If this is Frame from a Video, I would go back to PrPro and Export a Frame, into either TIFF, or BMP, and then do the same up-rezzing in PS.
If you want something else, please give us details of what it is that you want to capture and also the size that you will be printing to.
Good luck,
Hunt
-
5. Re: How do I change picture resolution from screen capture?
zorrocbr Jan 12, 2011 11:15 AM (in response to Bill Hunt)What I am doing is taking a frame snap shot off the timeline, saving it as a picture and then bringing it into Photoshop to re-size and save as a BMP and then bringing that into Quark Express. The actual picture size may vary (2 inches by 2 inches, up to 7 inches height by 5 inches width). My point is that I would like the best possible resolution from the frame snap shot for the best possible printed output. The default seems to be 70 DPI in Encore (In Womble it's 100 DPI which leads to a slightly better final product). If I could get better that would be great, particularly since I sometimes use Blu-ray and the image in theory could be pretty sharp.
-
6. Re: How do I change picture resolution from screen capture?
Stan Jones Jan 12, 2011 1:02 PM (in response to zorrocbr)My point is that I would like the best possible resolution from the frame snap shot for the best possible printed output. The default seems to be 70 DPI in Encore (In Womble it's 100 DPI which leads to a slightly better final product).
What pixel size is the export from Encore? What pixel size is the export from Womble? They are probably the same. Make the dpi the same for either and look at the print output that goes with it. It doesn't matter. You won't get a better final product from Womble.
-
7. Re: How do I change picture resolution from screen capture?
Bill Hunt Jan 12, 2011 1:32 PM (in response to zorrocbr)Then just use PS to up-rez the image. If need be, do it in 10% increments, until you have the final Image Size & Resolution that you need. Remember to Resample. This ARTICLE might prove useful.
Good luck,
Hunt
-
8. Re: How do I change picture resolution from screen capture?
zorrocbr Jan 12, 2011 3:43 PM (in response to Bill Hunt)In Premier Pro CS5 and Encore CS5 the image size is 10 inches by 6.667 inches and the resolution is 72 pixels/inch.
Pulling from womble the image size is 7.2 inches by 4.8 inches and the resolution is 100 pixels/inch.
In either case, re-sizing the image in photoshop doesn't change the pixels/inch resolution.
I want to capture the original image in as good resolution as possible rather than having to correct it after capture.
Kind of like scanning an image. If you are going to blow it up later you want to scan at higher resolutions than if you don't. There is of course image quality versus file size issues, etc. etc. but at least I would have the option to change resolutions on capture.
-
9. Re: How do I change picture resolution from screen capture?
Stan Jones Jan 12, 2011 4:26 PM (in response to zorrocbr)I completely agree with your goal - getting as a good a resolution print as possible. But your focus on dpi for the capture of a frame will not help you.
Kind of like scanning an image. If you are going to blow it up later you want to scan at higher resolutions than if you don't. There is of course image quality versus file size issues, etc. etc. but at least I would have the option to change resolutions on capture.
Scanning at a higher resolution adds more pixels. So, for example, scanning a finely detailed 7.2 x 4.8 inch image at 300 dpi produces 2160 x 1440 pixels. Scan a grainy photograph similarly, and it will be 2160 x 1440 and look lousy. Use a 5 megapixel camera to shoot the original scene, you've got more pixels. If you have only the SD video image, all you have is the 720 x 480 pixel image. It doesn't matter how you set the dpi on capture, just that you capture all 720 x 480 pixels.In Premier Pro CS5 and Encore CS5 the image size is 10 inches by 6.667 inches and the resolution is 72 pixels/inch.
Pulling from womble the image size is 7.2 inches by 4.8 inches and the resolution is 100 pixels/inch.
The part you are not listing is the fact that for each of those the pixel size is 720x480. As long as you capture the 720 x 480, the resolution of the image is not improved by flagging it as 72 dpi or 100 dpi. You can change that in photoshop for either of those captures, and you get a different print size, but no more or less pixels.
In either case, re-sizing the image in photoshop doesn't change the pixels/inch resolution. I want to capture the original image in as good resolution as possible rather than having to correct it after capture.
"As good resolution as possible" is 720 x 480.
-
10. Re: How do I change picture resolution from screen capture?
Bill Hunt Jan 12, 2011 6:37 PM (in response to zorrocbr)It sounds like you have an image that is larger than what you wish to print.
If that is the case, first choose Image Size, with Constrain Proportions checked, Resample unchecked, and alter one of the dimensions to suit. What is the resultant DPI/PPI?
Now, if you need more, check Resample, and up the DPI/PPI to what you need. See the Stair-stepping method, above.
I think that you are missing the Resample checkbox here.
Good luck,
Hunt
-
11. Re: How do I change picture resolution from screen capture?
Bill Hunt Jan 12, 2011 6:39 PM (in response to zorrocbr)Kind of like scanning an image. If you are going to blow it up later you want to scan at higher resolutions than if you don't. There is of course image quality versus file size issues, etc. etc. but at least I would have the option to change resolutions on capture.
With Video, you do not have any option to change the DPI/PPI. In Video, that is meaningless. You are not scanning an image. You are capturing an image from Video. They are very, very different.
Good luck,
Hunt
-
12. Re: How do I change picture resolution from screen capture?
zorrocbr Jan 12, 2011 9:53 PM (in response to Bill Hunt)If I understand correctly, the capture resolution is whatever is on the timeline. If it is a very sharp 1920 X 1080 P then the image captured will be a very sharp high resolution image even though in photoshop it will still say 72 pixels/inch. If it is a sharp 720 X 480 standard def image than that is what it will be in photoshop even though it will say 72 pixels/inch. The blu ray image "should" be significantly better. This does make sense to me except why photoshop would show encore as 72 pixels/inch and Womble as 100 pixels/inch, shouldn't they show the same thing?
-
13. Re: How do I change picture resolution from screen capture?
Stan Jones Jan 13, 2011 7:14 AM (in response to zorrocbr)If it is a very sharp 1920 X 1080 P then the image captured will be a very sharp high resolution image even though in photoshop it will still say 72 pixels/inch.
Right. Another way of saying that: if the program happened to save the 1080 image as 72 dpi and saved the 480 as 100 dpi, which would provide the better resolution for a print purpose? The one saved as 72, because it has more pixels - you can change the dpi to give you the print size you want without giving up any pixels, and then, as Bill describes, pushing the uprez (increasing the pixels) till the quality suffers. The other point I think we both made is to preferably go back to your source (i.e. your 1080 source - I assume that is the source) in Premiere or whatever gives you the least processed source to extract the frame.This does make sense to me except why photoshop would show encore as 72 pixels/inch and Womble as 100 pixels/inch, shouldn't they show the same thing?
Just a quirk of the applications. I use VideoReDo on occassion - from a vob, it saves a square pixel 640x480 tagged as 72dpi.
-
14. Re: How do I change picture resolution from screen capture?
Bill Hunt Jan 13, 2011 7:53 AM (in response to zorrocbr)except why photoshop would show encore as 72 pixels/inch and Womble as 100 pixels/inch, shouldn't they show the same thing?
If you look back up at the dimensional differences between the images from the two programs, you will see the difference. Do not have those exact dimensions handy. If you were to change the Image Size of the PrPro version to 100 PPI, with the Resample UNCHECKED, the inch x inch dimensions should match up very, very closely. Also, the difference, in print, between a PPI of 72 vs 100, even if the inch x inch dimensions were identical, would be almost impossible to see.
Good luck, and hope that this helps,
Hunt
-
15. Re: How do I change picture resolution from screen capture?
zorrocbr Jan 13, 2011 12:16 PM (in response to Bill Hunt)Thanks for the help. :-)
-
16. Re: How do I change picture resolution from screen capture?
Stan Jones Jan 13, 2011 3:34 PM (in response to zorrocbr)You're welcome.



