geogphotos Posted November 25, 2020 Share Posted November 25, 2020 (edited) My QC nightmare continues. With the 27 inch Mac do you view images at 200% or 100% ( I don't think that 100% is truly 100% from previous discussions here...or something like that). With getting over 70,000 pics online I thought I was a reasonably competent judge of what QC expect but obviously not. I have a very large number of dark churches, low light, high ISO accepted but now wonder if that was fortunate. All of those were assessed on 27 in at 100% not 200%. Being aware of this will allow me to half the size of any that might have any hint of softness. Edited November 25, 2020 by geogphotos Link to comment Share on other sites More sharing options...
CAROL SAUNDERS Posted November 25, 2020 Share Posted November 25, 2020 100% for me.... Carol Link to comment Share on other sites More sharing options...
geogphotos Posted November 25, 2020 Author Share Posted November 25, 2020 6 minutes ago, CAROL SAUNDERS said: 100% for me.... Carol Thanks Carol. That's a relief for me. Link to comment Share on other sites More sharing options...
GeoffK Posted November 25, 2020 Share Posted November 25, 2020 (edited) . Edited February 20, 2021 by GeoffK Link to comment Share on other sites More sharing options...
MizBrown Posted November 25, 2020 Share Posted November 25, 2020 I have a iMac (Retina 5K, 27-inch, Late 2015). I check sometimes at 200% based on the earlier discussion of this. Haven't tried opening at lower resolution. Link to comment Share on other sites More sharing options...
geogphotos Posted November 25, 2020 Author Share Posted November 25, 2020 Thanks for the replies. I have submitted tens of thousands of images viewed at !00% including many that I have resized to 3800 pixels because they were borderline. So how did they pass?? I have a small number of images yet to submit and then I am going to take stock 😁. Too much messing around and can't get answers. Link to comment Share on other sites More sharing options...
Cal Posted November 25, 2020 Share Posted November 25, 2020 I view at 100% but occasionally go further if I feel the noise is borderline. As we've discussed before, any chroma noise needs to go, even if you sacrifice sharpness somewhat to get there (at which point I either downsize or give up). Link to comment Share on other sites More sharing options...
geogphotos Posted November 25, 2020 Author Share Posted November 25, 2020 3 minutes ago, Cal said: I view at 100% but occasionally go further if I feel the noise is borderline. As we've discussed before, any chroma noise needs to go, even if you sacrifice sharpness somewhat to get there (at which point I either downsize or give up). Thanks Cal. I have been submitting since 2002 so thought that I had a good enough idea. Link to comment Share on other sites More sharing options...
Betty LaRue Posted November 25, 2020 Share Posted November 25, 2020 100 for me also. Link to comment Share on other sites More sharing options...
M.Chapman Posted November 25, 2020 Share Posted November 25, 2020 On my 27" iMac with Retina display I check at 200% in PS. (NB. that's with the display set to its default resolution in System Preferences>Displays>Display Resolution). It's quite complex with PS on an iMac retina display. The default resolution on my Retina display is 2,560 x 1,440. But the physical display resolution is double this (5,120 x 2,880). Most apps respect the default setting and display text etc. at a readable size by emulating a 2,560 x 1,440 display. But Adobe (and most image processing apps) only emulate the default resolution setting for their menus. But they display images at 100% with each image pixel being displayed using 1 physical display pixel. It gets even more complex if a scaled resolution (other than 2,560 x 1,440) is selected in System display preferences. Additional resolution adjustments are then applied "downstream" by the operating system and 1 image pixel is no longer displayed using 1 pixel on the display in PS. It's a real "dog's dinner". IMO, if using a 27" iMac Retina display, at its default resolution (in system settings), then images need to be inspected at 200% in PS, to avoid risk of QC failure. (Unless of course one has exceptional eyesight or sits *really* close to the screen). Mark Link to comment Share on other sites More sharing options...
geogphotos Posted November 25, 2020 Author Share Posted November 25, 2020 12 minutes ago, M.Chapman said: It's a real "dog's dinner". IMO, if using a 27" iMac Retina display, at its default resolution (in system settings), then images need to be inspected at 200% in PS, to avoid risk of QC failure. (Unless of course one has exceptional eyesight or sits *really* close to the screen). Mark My problem is that I have got used to assessing images at 100% - have done tens of thousands at this size - so feel like I have lost confidence now in my ability to judge if I need to switch. Link to comment Share on other sites More sharing options...
M.Chapman Posted November 25, 2020 Share Posted November 25, 2020 (edited) Here's a simple test. Download this image (Right-click - Save as). Open in PS and display at 100% NB. YOU HAVE TO DOWNLOAD THE IMAGE AND THEN VIEW IN PS (OR IMAGE EDITOR OF YOUR CHOICE). Viewing the image in a web-browser is not a reliable test, especially on a Retina display where the browser is likely to apply pixel doubling. If you see a uniform grey patch (with no vertical bars) on the left and a smooth ramp (with no steps) on the right, then you're not seeing every pixel (as required to 100% inspect an image). Try zooming to 200% in PS, or changing the system scaling settings. Mark Edited November 25, 2020 by M.Chapman Link to comment Share on other sites More sharing options...
M.Chapman Posted November 25, 2020 Share Posted November 25, 2020 (edited) 27 minutes ago, geogphotos said: My problem is that I have got used to assessing images at 100% - have done tens of thousands at this size - so feel like I have lost confidence now in my ability to judge if I need to switch. 200% view on a 5,120x2,880 display Retina display looks pretty similar like 100% on a 2,560 x 1,440 non-retina display. No need to change your judgement. But you will need to get used to clicking Cntrl+ one more time. Mark Edited November 25, 2020 by M.Chapman Link to comment Share on other sites More sharing options...
geogphotos Posted November 25, 2020 Author Share Posted November 25, 2020 (edited) I see the bars on the left and can just about distinguish steps if I look more closely at 100%. The steps become much more obvious at 200%. Edited November 25, 2020 by geogphotos Link to comment Share on other sites More sharing options...
Richard Coombs Posted November 25, 2020 Share Posted November 25, 2020 200% every time. Link to comment Share on other sites More sharing options...
M.Chapman Posted November 25, 2020 Share Posted November 25, 2020 1 minute ago, geogphotos said: I see the bars on the left and can just about distinguish steps if I look more closely. Must admit I struggle at 100%. What System display settings are you using? If you've still got your old monitor, try the same test on there for a comparison. I expect you'll see the lines and steps far more easily. Mark Link to comment Share on other sites More sharing options...
geogphotos Posted November 25, 2020 Author Share Posted November 25, 2020 1 minute ago, M.Chapman said: 200% view on a 5,120x2,880 display Retina display looks pretty similar like 100% on a 2,560 x 1,440 display. No need to change your judgement. But you will need to get used to clicking Cntrl+ one more time. Mark I have been using this same Retina display for years. I haven't just switched to it. Maybe since 2017. Now when I open up images at 200% that are QC passes I am left unsure. That's what I mean about losing confidence. I can do it in a technical sense it is just one more click but the basis of my assessment of images has changed. Link to comment Share on other sites More sharing options...
M.Chapman Posted November 25, 2020 Share Posted November 25, 2020 (edited) It would be useful to know what sort of displays Alamy QC are now using.... 27" iMac Retinas? Maybe Elisabeth or James can let us know? Mark Edited November 25, 2020 by M.Chapman Link to comment Share on other sites More sharing options...
geogphotos Posted November 25, 2020 Author Share Posted November 25, 2020 I think the message is clear to those who are used to viewing at 100% - probably best to switch to 200% before you end up in QC hell. Link to comment Share on other sites More sharing options...
geogphotos Posted November 25, 2020 Author Share Posted November 25, 2020 Just now, M.Chapman said: It would be useful to know what sort of displays Alamy QC are now using.... 27" iMac Retinas? Maybe Elisabeth or James can let us know? Mark And when they say to 'make sure to view images at 100%' maybe they should add a bit to that if you are using the display under discussion? Many of my images on Alamy submitted over the last 17/18 years would be borderline for QC including some good sellers. Link to comment Share on other sites More sharing options...
M.Chapman Posted November 25, 2020 Share Posted November 25, 2020 (edited) 3 hours ago, geogphotos said: Many of my images on Alamy submitted over the last 17/18 years would be borderline for QC including some good sellers. Why? They should look pretty similar at 200% on your iMac Retina display today to what they did at 100% on a normal display in the past. The colour maybe richer and the contrast better, but the sharpness should be similar... Or have I misunderstood? Mark Edited November 25, 2020 by M.Chapman Link to comment Share on other sites More sharing options...
geogphotos Posted November 25, 2020 Author Share Posted November 25, 2020 1 hour ago, M.Chapman said: Why? They should look pretty similar at 200% on your iMac Retina diplay today to what they did at 100% on a normal display in the past. The colour maybe richer and the contrast better, but the sharpness should be similar... Or have I misunderstood? Mark I suppose I feel that because I have lost confidence in my ability to assess the quality required and consequently doubt past decisions made about images. Link to comment Share on other sites More sharing options...
Mr Standfast Posted November 26, 2020 Share Posted November 26, 2020 2020 doesn't help. Link to comment Share on other sites More sharing options...
geogphotos Posted November 26, 2020 Author Share Posted November 26, 2020 My resubmission, excluding the failed image and two similars, has passed. My attempt at creating a tree silhouette against stormy sky ( thinking along the lines of a book cover) was adjudged to be 'soft and lacking definition' which isn't actually out-of-focus is it? More a nicer way of saying 'WTF is this supposed to be'? 😄 The lesson for me - don't try and be creative, stick to what you know. Anyway, will not doing any more stock for the foreseeable future. Time to delve into the Archive. Link to comment Share on other sites More sharing options...
CAROL SAUNDERS Posted November 26, 2020 Share Posted November 26, 2020 13 hours ago, geogphotos said: I suppose I feel that because I have lost confidence in my ability to assess the quality required and consequently doubt past decisions made about images. Glad you have it sorted, don't doubt your confidence, you have a port that some of us can only dream of😉 Carol Link to comment Share on other sites More sharing options...
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