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https://github.com/patwie/saccade

A sophisticated scientific image viewer for Linux with OpenGL support and synchronized viewports
https://github.com/patwie/saccade

canvas cpp cpp11 hdr-image image-viewer opengl qt5 scientific-visualization viewer

Last synced: 22 days ago
JSON representation

A sophisticated scientific image viewer for Linux with OpenGL support and synchronized viewports

Awesome Lists containing this project

README 

        
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.markdown-body .attention:before,

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}



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}



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}



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}



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}



@-webkit-keyframes animate-stripes {

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}



@-moz-keyframes animate-stripes {

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}



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}



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}



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}



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README
# Saccade


Build Status


GitHub release


A saccade (/səˈkɑːd/ sə-KAHD) is a quick and simultaneous movement of both eyes in the same direction.


This project is the missing scientific HDR image viewer inspired by shiver/idisplay. 


When working on computer vision problems a good image viewer can ease the process of inspecting images. The saccade project aims at providing an efficient image viewer with some sophisticated functions for comparing images. When dragging and zooming an image in one canvas, all other canvases synchronously also zoom and shift, so you get the pixel position in all images. Further, a marker can be set precisely on a specific image and all other views share the marker at exact the same position.


The image viewer features an OpenGL-based canvas to display images with dragging and zooming. It uses the FreeImage library to load images from different types.


  



The concept of Saccade is that are multiple canvases (each window so speaking) consists of different layers (all images per canvas). Each canvase has an active layer (the one containing the image you see).


Some action might affect only the active layer accross all canvases (global effects), e.g., zooming and dragging.


When manipulating the histogram, the changes can be applied to only the current active layer or all layers in the current canvas (holding the SHIFT key).




Features


    

  • OpenGL accelerated viewer using MipMap data structure
    • 

  • synchronize multiple views when dragging and zooming within one view
    • 

  • drag’n drop for open images
    • 

  • set marker on a specific pixel
    • 

  • filewatcher (images will be reloaded when they change)
    • 

  • interactive histogram widget which effects the image
    • 

  • supported fileformats: png jpg JPG bmp ppm tif CR2
    • 

  • helpful commands to arange multiple windows
    • 





Install from binary


The related binaries for the master branch are generated automatically and static linked to Qt5.9 to reduce dependencies and filesize. The pre-compile binaries are available with all dependencies for Ubuntu 16.04.




Install from Source




Requirements


I use it on Ubuntu 16.04 with Qt5.9. The requirements are currently:


    

  • Qt5.9 (should work with version >= 5.4)
    • 

  • CMake
    • 

  • FreeImage library
    • 

  • Google Log
    • 

  • Google Flags
    • 



I plan to add CUDA for speed up some functions.




Get dependencies and compile


See the dockerfile for all installing all dependencies.


Assuming you are on Ubuntu 16.04 getting all dependencies is done by


# install dependencies

sudo apt-get install libfreeimage3 libfreeimage-dev libgflags-dev libgoogle-glog-dev



The Ubuntu-packages contain old versions of Qt5. To get a recent Qt5 version use the following commands (you might need to register for Qt).


cd /tmp

wget http://download.qt.io/official_releases/qt/5.9/5.9.1/qt-opensource-linux-x64-5.9.1.run

chmod +x qt-opensource-linux-x64-5.9.1.run

./qt-opensource-linux-x64-5.9.1.run



And finally just get this repository by


# clone this repo

git clone https://github.com/PatWie/saccade.git

cd saccade

mkdir build

cd build

cmake -DCMAKE_BUILD_TYPE=Release ..

make



A copy and paste version to automate the GUI installer is described in the Dockerfile.


To add the saccade application to the uniy-launcher, edit saccade.desktop and adjust the paths. Then run


cp saccade.desktop $HOME/.local/share/applications/saccade.desktop



and you find the app icon in the Ubuntu searchbar. When debugging the application it might be helpful to start it with the flag --logtostderr 1.




Keyboard Shortcuts


General shortcuts



Action

Shortcut



quit entire app

Ctrl + Q



about and version info

F1



distribute window geometry

F2



automatically arrange windows

F3



new canvas

Ctrl + N



shortcuts for a single canvas (visible layer)



Action

Shortcut



quit canvas

Ctrl + W



add new image

Ctrl + O



next image

⇩, ⇨



delete single image

Del



previous image

⇧, ⇦



fit window to image

Ctrl + F



reset histogram

Ctrl + H



shortcuts for local effects (all layers in single canvas)



Action

Shortcut



reset histogram (all layers)

Ctrl + Shift + H



delete all images

Ctrl + Del



change hist. for all layers

Shift + mouse (histogram)



shortcuts for global effects (synchronized across all canvases)



Action

Shortcut



zoom in

Ctrl + plus



zoom out

Ctrl + minus



no zoom

Ctrl + 0



fit to window

Ctrl + 9



center image

Ctrl + C



toggle marker

Ctrl + M



shift image 10% right

Shift + ⇨



shift image 10% left

Shift + ⇦



shift image 10% down

Shift + ⇩



shift image 10% up

Shift + ⇧



next image in all canvases

Ctrl + ⇩, Ctrl + ⇨



prev. image in all canvases

Ctrl + ⇧, Ctrl + ⇦