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NotMyFault

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Posts posted by NotMyFault

  1. 2 hours ago, Affinity Rat said:

    So now my question would be, for a 24mp camera, what rez would maximize image sharpness minimizing the effects from Bayer interpolation.

    This doesn’t make practical sense.

    Shooting images with Cameras has multiple sources of blurriness (lens, motion, sensor noise, de-bayer, …). There is no single pixel resolution, and what have you won by minimizing de-Bayer blurriness without tackling other sources?
     

    Either use a Sigma Sensor (excellent at low ISO, but falls apart at higher ISO 1600), or a monochrome Camera and use colored filters to manually combine 3 exposures into color image. 
     

    Sigma says you roughly get 3x resolution from their sensors (who omit Bayer pattern)

    https://en.wikipedia.org/wiki/Foveon_X3_sensor

  2. Maybe step 1 is causing the trouble.

    if you paste something and get parent / child layers, the child gets clipped to the parent.

    and convert text to curves  creates multiple objects from one layer, this can break those parent/child relations. 
     

    a group of curves (converted from letters) behaves different vs. a text frame with multiple letters

    Can you upload the actual file ?

    if possible, remove everything from the file except the layers required to demonstrate the issue.

  3. Well, technically shapes have an orientation, even if this is not documented, and you can change the orientation by mirroring the shape. 
     

    And shapes technically have a start / end point. Add arrowheads to spot where it is (this gets really funny when using handcrafted vector brushes with a vertical structure e.g. multiple colored lines in one brush)
     

    This functionality is too minor to waste a feature request. Hoped that someone had found an ingenious trick. 

  4. Hi,

    as no one answered I try to step in.

    A few common causes:

    • color profile issues. 
    • color format issues. Exporting directly from RGB/32 to jpeg. RGB/32 can contain lightness above 1.0 and uses linear Gamma. The „downgrading“ to jpeg can lead to clipping in lightness and color gamut.

    we would need more information about the actual file. Upload it if possible. To reduce file size, save a copy, then flatten, delete all snapshots, and save without history. Provide screenshots of export settings used to create jpeg.

    which Mac HW, OS version, and Display do you use?

     

    in general, try to make a copy of the file, convert to RGB/16, export again and inspect.

  5. There are different ways to do this:

     

    a. Bitmap fill

    1. Group all your layers containing the clipping objects
    2. on the group, use the fill tool. 
    3. set mode to bitmap fill, and choose the image you want to use as fill

    b. Blend mode erase

    1. Group all your layers containing the clipping objects
    2. on the group, set blend mode to „erase“
    3. nest the group to the layer containing the foreground

    d. Rasterize to mask

    1. Group all your layers containing the clipping objects
    2. Rasterize to mask
    3. apply this mask to the image to get it masked 

     

  6. You images look great, so no urgency to check this. It is more a geek thing for those who want to experiment and optimize every little bit.

    I think the jpeg files could benefit from some of the sharpening methods I mentioned earlier:

    1. try adding an unsharp mask filter, with radius in range of 1 to 2 px. This should be applied selectively to the main object (the birds, not the sky) using a suitable mask
    2. try adding a highpass filter, with blend mode soft light or linear light. Keep radius small, 1-2.
    3. finally, create a pixel layer by merge visible. Then use tone map persona. By default the effect uses unsuitable slider settings. Reduce the strength from 100 to 0, so the image look’s unmodified. Then gradually change local contrast, usually 10-20%. This really boosts small details and color contrast. 
       

     

  7. I tested with the files you provided. There is absolutely no difference to a simple black and white adjustment. So no good reason to fiddle with channels panel which is a bit clumsy to use.

    never the less, you need to have a pixel layer. To get one, use merge visible. Then channels panel allows to right-click on a channel called „pixel cyan“, and you can „delete“ the channel (fill with black).

    the Same can be achieved non-destructively with a channels adjustment, where you choose the cyan channel, at set output contribution to 0.

    you may merge visible, but this is superfluous if you export to a raster format.

  8. 9 minutes ago, thomaso said:

    Do I assume right, that "sharper" here refers to mechanical IS only, not to software IS?

    Where do you set the demarcation? For me, IS is always a combination of HW (sensors, motors, tilting devices, or newer piezo-electric actuators without classical mechanics), combined with software. I don’t know pure mechanical IS (except like fluid-damped video tripods). 
     

    PS has some pure sw based PS (Affinity lacks).

  9. 1 minute ago, thomaso said:

     

    This reminds me to another question: Why do some sources recommend to disable IS in particular when shooting on a tripod? And again, does this refer to mechanical IS only?

    All (except some new ones, see below) Canon and Sigma recommend it in the user manuals, and my tests confirm this. You can see the difference with a 600m lens, e.g. moon shots.

    The IS is software controlled. The sw assumes a handheld lens, and tries to proactively correct the movements. Humans induce a certain range of frequencies. On a tripod, you get a totally different set of frequencies and amplitudes, which irritate the IS, and produce more jitter. When IS is activated, it continuously corrects, it never says „ah you holding it steady, i stop the motors“. Similar to continuous autofocus. Another reason is battery drain.

    Only most modern IS detect if a lens/camera is tripod mounted and automatically deactivate themselves.

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