Figure 16.30. Applying example for the Unsharp Mask filter
Voila 3.9.2 N
3 9-2 v - E Hardouin. Seasonal debut when 13L last of 13 over 1400m at Chantilly a week ago. Improvement likely second up. I had multiple Python versions installed. Like in Raspberry Pi there was Python3.5 installed and I installed also 3.9.2 without uninstalling 3.5. Then I installed pyserial with pip and tried my program. But the reason was that the linux symbolic link in python3 pointed to python3.9.2 version but pip3 pointed to python3.5.
Out-of-focus photographs and most digitized images often need a sharpness correction. This is due to the digitizing process that must chop a color continuum up in points with slightly different colors: elements thinner than sampling frequency will be averaged into an uniform color. So sharp borders are rendered a little blurred. The same phenomenon appears when printing color dots on paper.
The Unsharp Mask filter (what an odd name!) sharpens edges of the elements without increasing noise or blemish. It is the king of the sharpen filters.
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Some imaging devices like digital cameras or scanners offer to sharpen the created images for you. We strongly recommend you disable the sharpening in this devices and use the GIMP filters instead. This way you regain the full control over the sharpening of your images. |
To prevent color distortion while sharpening, Decompose your image to HSV and work only on Value. Then Compose the image to HSV. Go to Colors → Components → Decompose.... Make sure the Decompose to Layers box is checked. Choose HSV and click OK. You will get a new grey-level image with three layers, one for Hue, one for Saturation, and one for Value. (Close the original image so you won't get confused). Select the Value layer and apply your sharpening to it. When you are done, with that same layer selected, reverse the process. Go to Colors → Components → Compose.... Again choose HSV and click OK. You will get back your original image except that it will have been sharpened in the Value component.
Voila Editor's Review
Capture screen shots and video clips with this much needed Mac utility
I've been a freelance writer for over 20 years. I'm also a software QA guy. I've always had a need for a screen capturing tool. I either want to take screen shots of the programs I'm reviewing or of the errors in the software that I'm testing. I'm actually a bit of a screen shot-aholic. Most everything that I do either for my writing gig here at Soft32 or during the day for my software testing job requires me to take screen shots of something. This is why I really like Voila Screen Capture for Mac. It's a really cool utility for your Mac.
Voila 3.9.2 In English
Voila is an 'all-in-one' screen capture solution that can capture, edit and share anything on your computer's screen. Users can also video record the screens of their iOS device, like an iPhone or iPad in full resolution. After a screenshot is captured or recorded, the user can then share them on popular websites, send via e-mail or print using the buttons located on the UI. A complete set of tools including different capture methods, full webpage recording as well as easy sharing options make for a comprehensive and complete application that saves time and is easy to use.
Voila captures video with audio in high quality. You can capture the whole screen, or simply a user defined section. You can also capture video on your connected iDevice as well.
Voila captures full and partial screen stills as well. Voila has a flexible capture option that allows you to grab full or user defined areas of your screen. If needed, you can also capture entire web pages along with important metadata like page title, menus and other page elements.
Once you get your screen grabs, you can also annotate them using different fonts, shapes, blur options and speech bubbles, or callouts. Once you have everything set, Voila can also help you manage your screen shot collections. You can group similar images and videos together using custom labels. You can add titles, tags and descriptions so you can catalog and search for just the media object you need.
App Pro's: Easy to Use, User definable Hot Keys, Captures stills and video, Web Cam support, Still screen capture annotations
App Con's: Hot Key activation doesn't always work
Conclusion: Voila Screen Capture for Mac is a decent application. It starts when you start your Mac and sits in the Menu Bar until its needed. You're supposed to be able to activate it via a set of user-definable hot keys, but these didn't work consistently for me. More often than not, pressing the hot key combinations didn't do anything at all on my El Capitan powered 15' MacBook Pro.