long-exposure | : movie_camera : Creates a long exposure effect | Computer Vision library
kandi X-RAY | long-exposure Summary
kandi X-RAY | long-exposure Summary
This project creates long exposure-like images from an input video using Python and OpenCV. It computationally simulates the long exposure photography effect. Long-exposure, time-exposure, or slow-shutter photography involves using a long-duration shutter speed to sharply capture the stationary elements of images while blurring, smearing, or obscuring the moving elements. Long-exposure photography captures one element that conventional photography does not: an extended period of time. The paths of bright moving objects become clearly visible. Clouds form broad bands, head and tail lights of cars draw bright streaks, stars leave trails in the sky, and water waves appear smoothened. Only bright objects will leave visible trails, whereas dark objects usually disappear. Boats in long exposures will disappear during daytime, but will draw bright trails from their lights at night.
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Top functions reviewed by kandi - BETA
- Process the video .
- A function that calculates the average of the values .
- Local Exposure .
- Initialize the model .
- Play video .
- Command line interface .
long-exposure Key Features
long-exposure Examples and Code Snippets
Community Discussions
Trending Discussions on long-exposure
QUESTION
So CIFilter
takes in a RAW DNG image. Is there a way I can output the image back as a RAW?
I'm trying to blend RAW images loaded in as CIFilter
's and then output them as a RAW back. It's a simple interpolation of the buffer's RAW values. Yes I understand that RAW photos don't have pixels. I'm just trying to work with the underlying BAYER filter representation here. Is there any way to do this using CIFilter
. How about using a third party library?
So I'm trying to blend (something like exposure stacking) multiple images taken using a Bracketed Photo Capture. So I have multiple RAW photos' pixel buffer and I'm trying to average them out their pixel values.
Before doing that, I'm trying to confirm that my pixel values are correct. So I take a photo of a red green or blue sheet of paper so that it is all one solid color(ish), and I try to see if the pixel buffer values are what I would expect. iPhones have RGGB bayer layout so I'd expect a very solid red picture to have the following layout:
...ANSWER
Answered 2019-Nov-25 at 08:16There is no way to do what you want with Core Image. You can "only" develop and process RAW input on a pixel basis with CIFilters
.
However, you can access the data of the CVPixelBuffers
directly with CVPixelBufferGetBaseAddress()
(and some proper locking). So you could do your blending on the CPU and maybe use vDSP
to improve the performance.
QUESTION
I am building an Android Things "kiosk" style application and I want an image to show in the background like a wallpaper. I'm using Unsplash Source to get a random image but the source URL (https://source.unsplash.com/1080x1920/?long-exposure) always redirects to an image URL, so I can't use this:
...ANSWER
Answered 2019-Apr-08 at 23:54Use Picasso.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install long-exposure
You can use long-exposure like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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