LidarViewer | Highly interactive application for processing | Image Editing library

 by   KeckCAVES C++ Version: Current License: GPL-2.0

kandi X-RAY | LidarViewer Summary

kandi X-RAY | LidarViewer Summary

LidarViewer is a C++ library typically used in Media, Image Editing applications. LidarViewer has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

LiDAR Viewer is a highly interactive application for processing, visualization and analysis of large 3D point cloud data, such as produced by terrestrial or airborne LiDAR scanning. LiDAR Viewer is based on the Vrui software development toolkit (see and runs in a variety of environments ranging from laptop or desktop computers over semi-immersive environments such as Geowalls to fully immersive virtual reality environments such as CAVEs. More information about LiDAR Viewer can be found at LiDAR Viewer’s development was supported by the University of California, Davis, by the UC Davis W.M. Keck Center for Active Visualization in the Earth Sciences (KeckCAVES, and the W.M. Keck Foundation.
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            kandi-support Support

              LidarViewer has a low active ecosystem.
              It has 64 star(s) with 36 fork(s). There are 16 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 2 open issues and 1 have been closed. On average issues are closed in 8 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of LidarViewer is current.

            kandi-Quality Quality

              LidarViewer has no bugs reported.

            kandi-Security Security

              LidarViewer has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              LidarViewer is licensed under the GPL-2.0 License. This license is Strong Copyleft.
              Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

            kandi-Reuse Reuse

              LidarViewer releases are not available. You will need to build from source code and install.
              Installation instructions are available. Examples and code snippets are not available.

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            LidarViewer Key Features

            No Key Features are available at this moment for LidarViewer.

            LidarViewer Examples and Code Snippets

            No Code Snippets are available at this moment for LidarViewer.

            Community Discussions

            QUESTION

            Why did my new python edited photo lose brightness?
            Asked 2021-Jun-07 at 13:18

            I am working on a photo editing project and I am curious about why did my new photo lose it's brightness. The program shoud get 2 photos out of the original one. One of them shoud contain only RED value and the other shoud contain BLUE and GREEN values. But when I put them back together the brightness is not the same as in original picture.

            Here is my code:

            ...

            ANSWER

            Answered 2021-Jun-07 at 13:18

            blend2 = Image.blend(img, img2, 0.5)

            The third argument, 0.5, is the alpha level of each layer. Essentially, you are setting each layer to be 50% transparent. This effectively reduces the brightness. Instead, you should read in img1 and img2 and then set the red layer of the second to the red layer of the first.

            Source https://stackoverflow.com/questions/67872281

            QUESTION

            Python tkinter, resizing transparent image on canvas
            Asked 2021-Apr-02 at 12:39

            I am making an isometric game using python and the Tkinter library. I ran into a problem though when rendering my schematics to the screen. I can't seem to keep the transparent background even though the images (.png) are being stored as rgba in pil. When I save the images, as they are, just before being loaded; they still have a transparent background so it's something to do with the way I'm resizing the image. I have looked around and most answers to this that I have seen say to edit the pil plugin or aren't actually resizing the image. Is there a relatively simple way to resize an image and keep transparency that doesn't include messing around with the pil plugin??

            My code:

            ...

            ANSWER

            Answered 2021-Apr-02 at 12:39

            Ok, so I managed to find the issue. The problem was not with the resizing but with the label as @jasonharper had stated. The working way is very unclean and creates unused labels to store the variable to prevent movement to the python garbage. I have tried with an array/list however it doesn't seem to work, that code is below. I don't see many people having this issue in the future because it's so small but I'll put the working code below as well.

            Code using list that doesn't work:

            Source https://stackoverflow.com/questions/66907537

            QUESTION

            Application/script for merging images, applying color, black & white filter in batch?
            Asked 2021-Mar-30 at 08:09

            I'm making achievements for my game, and I would like to make an automated process to save a lot of time instead of doing it manually. (I'm using Windows)

            The inputs of this process would be

            • one rectangular opaque background image (i.e. 200x200 PNG)

            • Color A, (i.e. in hex)

            • Color B, (i.e. in hex)

            • and multiple same sized, rectangular, transparent foreground images. (i.e. 200x200 PNG)

            And the process would do this for every foreground image:

            1. Start with the background image.

            2. Merge the foreground image with Color A filter applied, and also with an offset from the middle.

            3. Merge the foreground image with Color B filter applied, in the middle.

            4. Save the result in a file.

            5. Apply a black & white filter and save the result in a file.

            So the output would be for example multiple 200x200 PNG images, each of it having a colored and a black & white version

            I think there must be an application capable of this.

            But if not, is there a way to quickly do this in some programming/script language for example in Python?

            ...

            ANSWER

            Answered 2021-Mar-30 at 08:09

            Here's the best you can hope for without providing any images or expected results. I am using the following as background, image A and image B:

            Then using ImageMagick, like this:

            Source https://stackoverflow.com/questions/66861398

            QUESTION

            Changing / 's contrast
            Asked 2020-Dec-06 at 20:33

            I've used an example code (source: https://forum.qt.io/topic/11390/increasing-contrast-of-qimage/4) to change contrast of a QImage (I've also edited it a little) :

            ...

            ANSWER

            Answered 2020-Dec-06 at 20:33

            I just had to set the factor variable from ~1 to ~30 to change the contrast by giving these values to the function and the QSlider returned incorrect values.

            It is also possible to reverse the image colors by passing values from -1 to -30, to also change the contrast of the reversed image.

            so the right code will be like:

            Source https://stackoverflow.com/questions/65129598

            QUESTION

            Trying to make 3 x 3 montage of 9 images using ImageMagick but getting error for command line command
            Asked 2020-Aug-13 at 16:45

            I am trying to make a large montage of 9 images in a grid of 3x3 on my windows 10 laptop. Image size of all 9 images are same. I did a research on Internet and found how to do it either vertically or horizontally but not for a array of images or grid. I downloaded ImageMagick software from their website to use their command line options as shown in this page but when I use the command given below, I get error montage is not recognized as an internal or external command, operable program or batch file

            Please help or suggest another way to do it. Thanks

            Here is the command I am using montage 1.jpg 2.jpg 3.jpg 4.jpg 5.jpg 6.jpg 7.jpg 8.jpg 9.jpg -geometry +3+3+3 montage_geom.jpg

            ...

            ANSWER

            Answered 2020-Aug-13 at 16:45

            Your montage ImageMagick syntax is incorrect. Try

            Source https://stackoverflow.com/questions/63394471

            QUESTION

            How can I write a cv2 / Pillow-modified image out to disk?
            Asked 2020-Mar-31 at 17:52

            I have an image opened with Image.open(). I make some changes, reassigning pixel RGV values,and try to save.

            When I try to save, I get:

            ...

            ANSWER

            Answered 2020-Mar-31 at 17:52

            Seems that you open the Image in Pillow and try to save the Pillow Image with OpenCV. OpenCV expect a numpy array. You should first convert your image before write in file with opencv.

            Check this post : https://stackoverflow.com/a/14140796/13103631

            I think, it will solve your issue

            Source https://stackoverflow.com/questions/60956754

            QUESTION

            How to process each page of a multi-page PDF in place with imagemagick?
            Asked 2020-Mar-19 at 16:42

            I have a multi-page PDF with photographed book pages. I want to remove gradients from every page to prepare for optical character recognition.

            This command works fine on a PNG of a single page:

            ...

            ANSWER

            Answered 2020-Mar-14 at 20:56

            It seems unlikely you'd want to pass a PDF to OCR, since Tesseract et al prefer PNG or NetPBM PPM files, so you might as well split your big PDF into individual PNG (or other) files:

            Source https://stackoverflow.com/questions/60686993

            QUESTION

            Crop the image from encoded data on submission - ( File Pond - FilePondPluginFileEncode - imageEditEditor- Doka - Crop - PHP )
            Asked 2020-Jan-08 at 08:04

            Is there any proper PHP code to use when cropping the image using the data that get passed from the hidden field when using the 'FilePondPluginFileEncode'? ( I'm using Doka as image editor) https://pqina.nl/doka/?ref=filepond

            The below options get passed as encoded meta data from file-pond in a hidden field when I select an image and then edit crop. + the base64 image string ( https://pqina.nl/filepond/docs/patterns/plugins/file-encode/)

            ...

            ANSWER

            Answered 2020-Jan-07 at 22:48

            Remember to add the FilePondPluginImageTransform, and FilePondPluginFileEncode, to your FilePond.registerPlugin when using imageEditEditor: Doka.create({}) in FilePond instance.

            Source https://stackoverflow.com/questions/59620470

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install LidarViewer

            It is recommended to download or move the source packages for Vrui and LiDAR Viewer into a src directory underneath the user’s home directory. Otherwise, references to ~/src in the following instructions need to be changed. It is also recommended to skip optional steps 4 and 6 in the following instructions. LiDAR Viewer does not need to be installed in order to be used; installation (to a system directory such as /usr/local) is only recommended if LiDAR Viewer will be used from multiple user accounts.
            Install Vrui from ~/src/Vrui-<version> (see Vrui README file).
            Change into ~/src directory and unpack the LiDAR Viewer tarball: > cd ~/src > tar xfz <download path>/LidarViewer-<version>.tar.gz or - > tar xf <download path>/LidarViewer-<version>.tar
            Change into LiDAR Viewer base directory: > cd LidarViewer-<version>
            If the Vrui version installed in step 0 was not 4.2, or Vrui’s installation directory was changed from the default of /usr/local, adapt the makefile using a text editor. Change the value of VRUI_MAKEDIR close to the beginning of the file as follows: VRUI_MAKEDIR := <Vrui install dir>/share/make Where <Vrui install dir> is the installation directory chosen in step 0. Use $(HOME) to refer to the user’s home directory instead of ~.
            Optional: Adapt makefile if LiDAR Viewer is to be installed in a different location, for example /usr/local. Set INSTALLDIR to the desired target location. LiDAR Viewer will be then be installed in <INSTALLDIR>/bin, and its configuration file will be installed in <INSTALLDIR>/etc (where <INSTALLDIR> is the value of INSTALLDIR set in the makefile).
            Build LiDAR Viewer: > make This creates the following executables in ./bin: The LAS file range calculation utility, CalcLasRange; the LiDAR data preprocessor, LidarPreprocessor; the point cloud subtraction filter, LidarSubtractor; the processor to calculate lighting information, LidarIlluminator; the LiDAR data viewer itself, LidarViewer; and a utility to print saved primitives in human-readable form, PrintPrimitiveFile.
            Optional: Install LiDAR Viewer in the selected target location. This is only necessary if the INSTALLDIR variable in the makefile was changed. By default, LiDAR Viewer can be run from its base directory. To install: > make install or, if the target location is a system directory - > sudo make install This will copy all executables into <INSTALLDIR>/bin, and the LidarViewer.cfg configuration file into <INSTALLDIR>/etc.
            Optional: Add directory containing the LiDAR Viewer executables (~/src/LidarViewer-<version>/bin in the default installation, <INSTALLDIR>/bin otherwise) to the user’s search path. This allows running LiDAR Viewer from any directory. Using csh or tcsh: > setenv PATH ${PATH}:~/src/LidarViewer-<version>/bin or - > setenv PATH ${PATH}:<INSTALLDIR>/bin where <INSTALLDIR> is the target location set in the makefile. Using bash: > export PATH=${PATH}:~/src/LidarViewer-<version>/bin or - > export PATH=${PATH}:<INSTALLDIR>/bin These lines can also be added to the user’s .cshrc or .bashrc files to make the additions persist between logins.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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            https://github.com/KeckCAVES/LidarViewer.git

          • CLI

            gh repo clone KeckCAVES/LidarViewer

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            git@github.com:KeckCAVES/LidarViewer.git

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