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Everything posted by John Rostron
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@dronecrasher, as far as I can see, there is little, if anything, to choose between these images. Super Resolution is quite time-consuming (especially when batch-processing is not working properly). Is it really worth the effort? Yesterday I took four burst-mode sets of four different subjects. When I have finished processing them I will report back. John
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Dedicated scanner software (such as VueScan and SilverFast) will rotate only in multiples of 90 degrees. They are not general-purpose photo-editing programs. In Affinity photo, you can rotate an image in various ways such as: Use the Crop tool. If you select the crop tool, you can click just outside one of the corners, you will see a curved double-headed arrow. You can use this to drag and freely rotate the image. Use the transform Panel. Here, you can specify the rotation in degrees by the label at the bottom left. You can also choose the centre of rotation using the block of nine squares. John
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Use Document > Resize Document (not Resize Canvas). Make sure the lock between width and height is intact (it is by default). Enter the desired width (or height) and click Enter. The height (or width) should appear automatically. You can enter a percentage instead of a pixel value (say 200%). You can select a resizing algorithm. Use Lanczos for enlarging. Click on OK to confrm. You cannot create a template or macro for this. If you try, it will always result in the same pixel dimensions as the one in the recording. Fine if that is what you want. It is possible to do what you want using Filter > Distort > Equations. Have a look at my Tutorial on this. A disadvantage of this is that you cannot specify the scaling algorithm. John
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I have now taken a 14-shot burst hand-held and without stabilisation. I stacked them at the original size, and at 200% using nearest neighbour. For the 100% stack, I could detect no difference between the original images and either the mean or median of the stack. For the 200% set, the image quality was noticably poorer (from the resizing?) and again there was no improvement. I will try again on a different subject. (My original was a close-up of Ivy stems and roots on a tree trunk.) John
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merge layers.
John Rostron replied to egg's topic in Pre-V2 Archive of Affinity on Desktop Questions (macOS and Windows)
Got to Layer > Merge Visible and it will merge your visible layers. Or you can select two or more layers and go to Layer > Merge Selected. If you posted your Question on the Questions Forum, then you would probably have got this answered sooner. John -
Assume you have a 2100 by 1500 pixel Image. Select Document > Resize Document Ensure that the lock icon between width and height is intact For the width, enter 1400 (or 1400px); ignore the height (Optional) Select Lanczos as the method Click on OK This should give you a 1400 by 1000 px image. If you force it to 1400 by 1050 (by unlocking the lock), then the image will be distorted slightly. Leaving the lock intact keeps the proportions intact. John
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Glass distortion
John Rostron replied to sam3's topic in Pre-V2 Archive of Affinity on Desktop Questions (macOS and Windows)
I downloaded the image and selected just the window onto a separate layer. Applying the FFT filter to this made absolutely no difference. John -
Yes, you are posting in the right place. Affinity Photo does offer a mesh warp style of free transform but there is no equivalent on Designer, which is why Callum asked you what software you are using. For scanning, if you use a separate program such as VueScan or the software that came with your scanner then, if you set it to save as .tiff, and if you set Photo as the default program to open .tif files, then following a scan > save, your scanned image will open in Photo. John
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@R C-R and @owenr, I take your points. I was just going on the general resizing recommendations. Super-resolution is one of those things that look interesting and makes me think that I must try it some day. The problem seens to be in generating the subtle but non-zero displacement between each image. Perhaps a burst mode, hand held might do it. John
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What you say may be true, but I cannot see the logic of it. (Even if it is true, I don't believe it!) Even Raw Therapee has to develop the image before scaling it, so 'scale the RAW file' is not what is happening. Unless you can point me to how I can rescale a raw file in Raw Therapee. I cannot find anything on this in the RawPedia. John
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No, as @firstdefence said, resizing the raw has to develop it first before saving as a .dng, so you are not gaining anything. Providing you save or export in a lossless format (such as .afphoto, .png or .tif) you will preserve all necessary infomation. I would load each raw file, develop each using the same preset for each, apply, resize 200% and then save/export. Then you can load your files into an appropriate stack. John
