In Govips, is there a functionality to overlay multiple images on a base image parallelly? There is a function - compositeMulti which takes a list of images but does it render it parallelly? Also, does it have a capability to identify which pixel of which image has to be rendered on the image , instead of iteratively going through all the images and rendering one by one.
Parallel overlaying of multiple images in govips
403 views Asked by Calypso At
1
There are 1 answers
Related Questions in GO
- Go Fiber and HTMX - HX-Trigger header is changed to Hx-Trigger, which is not what HTMX is listening for
- Golang == Error: OCI runtime create failed: unable to start container process: exec: "./bin": stat ./bin: no such file or directory: unknown
- Handling both JSON and form values in POST request body with unknown values in Golang
- invalid transaction: Transaction failed to sanitize accounts offsets correctly
- Golang lambda upload image into s3 static website
- Is there a way to get a list of selected module versions, but only for modules within the pruned graph?
- Save Interface in DB golang
- ERROR: column "country" is of type text[] but expression is of type record (SQLSTATE 42804)
- Trying to update the version.go file with the release tag from GitHub actions but its failing
- How can I optimize this transposition table for connect 4 AI?
- const declaration - How to evaluate expressions at compile time?
- How add array of authors for unique user in database in Goland IDE?
- Why is the main goroutine not blocked after write in unbuffered channel?
- Insert & Retrieve from a channel in same main function throws "goroutine 1 [chan receive]: main.main() /path exit status 2" error
- Gob error when decoding array of structs: decoding into local type but received remote type
Related Questions in IMAGE-PROCESSING
- RuntimeError: Given groups=1, weight of size [64, 1, 3, 3], expected input[1, 3, 416, 416] to have 1 channels, but got 3 channels instead
- Unable to open shape_predictor_68_face_landmarks.dat
- When transferring mri t1 to mni152 spaces, the dimensions change and lose information, is that not a problem?
- How to detect the exact boundary of a Sudoku using OpenCV when there are multiple external boundaries?
- Nuke BlinkScript: Why does the convolution kernel scale down the image?
- CV2 Python - image merging based on homography matrix - error in mergeing
- Python pillow library text align center
- Implementing Image Processing for Dimension Measurement in Arduino-based Packaging System
- AI tools for generating clean clipping paths
- efficient way to remove a background from an image in python
- I want to segment an MRI image of the spine and obtain only the vertebrae using Matlab
- Find Gradient Magnitude using skimage.feature.hog module
- AR Image Display Issue
- Using python OpenCV to crop an image based on reference marks
- Python: Generating an image using Multiprocessing freezes
Related Questions in VIPS
- NetVips Mosiac how to calculate the merge point
- Choosing a file structure for large scan images and libvips
- Is it possible to use libvips to rasterize a PDF in 16-bit depth?
- Python program freezes when multiprocessing call follows sequential call
- dzsave method not installed when including libvips-dev in dockerfile
- How to get a telegram bot to send an svg image https://phys-ege.sdamgia.ru/get_file?id=69140
- How to extract frames as individual webp/jxl files from a mov file with H.264/265 format?
- Could not open library 'vips.42' - Ruby/Jekyll
- Can I get a list of required packages to install libvips, libvips-dev, libvips-tools for version 8.14.4?
- Efficient "bandmax" function in pyvips?
- How to setup wasm-vips for next.js/react apps?
- Install libvips on golang docker container
- vips: unknown action "dzsave"
- Creating a Deep Zoom Image(.dzi) using pyvips library
- How to crop images at the center with Rails 7 Active Storage and Vips?
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
libvips (the image processing library behind govips) is demand-driven and horizontally-threaded. The image processing pipeline being computed is represented as a graph, each thread on your PC picks a tile in the output image (usually 128 x 128 pixels), and threads independently walk the graph from end to start computing pixels.
The
compositeoperator (the thing thatcompositeMulticalls) computes the result of overlaying a set of layers with PDF-style blend modes. For each tile, it selects the subset of layers which are visible at that point. It can only do this if the selected blending modes are 'skippable', ie. compositing black (the empty pixel) over the base image will have no effect.You can see the test for skippability here:
https://github.com/libvips/libvips/blob/master/libvips/conversion/composite.cpp#L1273-L1296
And the layer culling loop is here:
https://github.com/libvips/libvips/blob/master/libvips/conversion/composite.cpp#L443-L460
Finally, the selected layers are composited, using vector arithmetic if possible. It represents an RGBA pixel as a vector of four floats and computes all of them together.
tldr: libvips composite is threaded, vectorized, and (if possible) does tile-wise visibility culling.