image VS opencv-rust

I started by exploring the audio processing part and then I discovered Symphonia which is a rust crate for audio processing. First I build a function to extract mono audio from a file using it and kept a frequency limited to 41.1 KHz as it is the maximum frequency that the human ear can hear. I also implemented functions to downsample the audio and normalise it. Then I visualized the spectrogram of the audio using image.

With the help of the image crate, loading an image from disk is fairly straightforward.

FTR there is a WebP decoder implementation in safe Rust in the image crate: https://github.com/image-rs/image

It used to be quite incomplete for a long time, but work last year has implemented many webp features. Chromium now has a policy of allowing the use of Rust dependencies, so maybe Chromium could start adopting it?

Hello! So I have a local app that I am currently running on desktop (windows). I'm using egui for the UI, and the program basically opens a folder, gets all the images in the folder, and then uses the image-rs library to resize and create a grid of images / some other operations.

png is the de-facto standard Rust crate for reading and writing PNG images, used e.g. by the image crate.

There's also a CLI to convert between formats. It uses the crate image.

exr is a is a 100% Rust and 100% safe code library for reading and writing OpenEXR images. It is used by the popular image crate to read and write OpenEXR.

We're currently looking for contributors to add support for zune-jpeg to the image crate. The image maintainers are open to it, but don't have the capacity to do it themselves. You can find more details here.

It would be helpful to contribute to the general change towards an untyped buffer with runtime representations for color space information and fallible conversions. (https://github.com/image-rs/image/pull/1718). It's currently stalling on having too few eyeballs to judge the impact and need for that complexity.

https://github.com/twistedfall/opencv-rust makes it evident that they do try to support using a prebuild system-opencv. Maybe it is not correctly recognized?

opencv

The de facto solution for smart image processing is to use a computer vision library, such as opencv, which has experimental rust bindings: https://github.com/twistedfall/opencv-rust

There is an OpenCV bindings crate. This example might be what you're after https://github.com/twistedfall/opencv-rust/blob/master/examples/video_capture.rs

For example, this is the build script of the opencv bindings: https://github.com/twistedfall/opencv-rust/blob/master/build.rs

I’m trying to get around a known build issue—it would be great for it to be fixed upstream, but I don’t have any control over it except for setting OUT_DIR during its compilation.

I've been using https://github.com/twistedfall/opencv-rust a lot lately and it's really fantastic, they've done a great job matching up with how C++ works, so there are definitely good examples out there.

I never tried it, but the OpenCV bindings might work.

I thought it was going to be unsafe because of how Mat is implemented (more information here). ... I tested it and it should be fine memory-wise. My thought was that the code below was going to be allowed to compile.