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//! Convolution effects such as sharpening, blurs, sobel filters, etc., extern crate image; use wasm_bindgen::prelude::*; use crate::{PhotonImage}; use crate::helpers; fn conv(mut photon_image: &mut PhotonImage, kernel: Vec<f32>) { let img = helpers::dyn_image_from_raw(&photon_image); let filtered_img = img.filter3x3(&kernel); photon_image.raw_pixels = filtered_img.raw_pixels(); } /// Noise reduction. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to sharpen an image: /// use photon::conv::sharpen; /// photon::channels::sharpen(img); /// ``` /// Adds a constant to a select R, G, or B channel's value. #[wasm_bindgen] pub fn noise_reduction(photon_image: &mut PhotonImage) { let kernel = vec![0.0f32, -1.0, 7.0, -1.0, 5.0, 9.0, 0.0, 7.0, 9.0]; return conv(photon_image, kernel); } /// Sharpen an image. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to sharpen an image: /// use photon::conv::sharpen; /// photon::channels::sharpen(img); /// ``` /// Adds a constant to a select R, G, or B channel's value. #[wasm_bindgen] pub fn sharpen(photon_image: &mut PhotonImage) { let kernel = vec![0.0f32, -1.0, 0.0, -1.0, 5.0, -1.0, 0.0, -1.0, 0.0]; return conv(photon_image, kernel); } /// Apply edge detection to an image, to create a dark version with its edges highlighted. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to increase the Red channel for all pixels by 10: /// use photon::channels; /// photon::conv::edge_detection(img); /// ``` #[wasm_bindgen] pub fn edge_detection(photon_image: &mut PhotonImage) { let kernel = vec![-1.0f32, -1.0, -1.0, -1.0, 8.0, -1.0, -1.0, -1.0, -1.0]; return conv(photon_image, kernel); } /// Apply an identity kernel convolution to an image. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to apply an identity kernel convolution: /// use photon::channels; /// photon::conv::identity(img); /// ``` #[wasm_bindgen] pub fn identity(photon_image: &mut PhotonImage) { let kernel = vec![0.0f32, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0]; return conv(photon_image, kernel); } /// Apply a box blur effect. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to apply a box blur effect: /// use photon::channels; /// photon::conv::box_blur(img); /// ``` #[wasm_bindgen] pub fn box_blur(photon_image: &mut PhotonImage) { let kernel = vec![1.0f32, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0]; return conv(photon_image, kernel); } /// Apply a gaussian blur effect. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to apply a gaussian blur effect to an image: /// use photon::channels; /// photon::conv::gaussian_blur(img); /// ``` #[wasm_bindgen] pub fn gaussian_blur(photon_image: &mut PhotonImage) { let kernel = vec![1.0f32, 2.0, 1.0, 2.0, 4.0, 2.0, 1.0, 2.0, 1.0]; return conv(photon_image, kernel); } /// Detect horizontal lines in an image, and highlight these only. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to display the horizontal lines in an image: /// use photon::channels; /// photon::conv::detect_horizontal_lines(img); /// ``` #[wasm_bindgen] pub fn detect_horizontal_lines(photon_image: &mut PhotonImage) { let kernel = vec![-1.0f32, -1.0, -1.0, 2.0, 2.0, 2.0, -1.0, -1.0, -1.0]; return conv(photon_image, kernel); } /// Detect vertical lines in an image, and highlight these only. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to display the vertical lines in an image: /// use photon::channels; /// photon::conv::detect_vertical_lines(img); /// ``` #[wasm_bindgen] pub fn detect_vertical_lines(photon_image: &mut PhotonImage) { let kernel = vec![-1.0f32, 2.0, -1.0, -1.0, 2.0, -1.0, -1.0, 2.0, -1.0]; return conv(photon_image, kernel); } /// Detect lines at a forty five degree angle in an image, and highlight these only. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to display the lines at a forty five degree angle in an image: /// use photon::channels; /// photon::conv::detect_fortyfivedeg_lines(img); /// ``` #[wasm_bindgen] pub fn detect_45_deg_lines(photon_image: &mut PhotonImage) { let kernel = vec![-1.0f32, -1.0, 2.0, -1.0, 2.0, -1.0, 2.0, -1.0, -1.0]; return conv(photon_image, kernel); } /// Detect lines at a 135 degree angle in an image, and highlight these only. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to display the lines at a 135 degree angle in an image: /// use photon::channels; /// photon::conv::detect_hundredthirtyfive_deg_lines(img); /// ``` #[wasm_bindgen] pub fn detect_135_deg_lines(photon_image: &mut PhotonImage) { let kernel = vec![2.0f32, -1.0, -1.0, -1.0, 2.0, -1.0, -1.0, -1.0, 2.0]; return conv(photon_image, kernel); } /// Apply a standard laplace convolution. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to apply a laplace effect: /// use photon::conv; /// photon::conv::laplace(img); /// ``` #[wasm_bindgen] pub fn laplace(photon_image: &mut PhotonImage) { let kernel = vec![0.0f32, -1.0, 0.0, -1.0, 4.0, -1.0, 0.0, -1.0, 0.0]; return conv(photon_image, kernel); } /// Preset edge effect. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to apply this effect: /// use photon::conv; /// photon::conv::edge_one(img); /// ``` #[wasm_bindgen] pub fn edge_one(photon_image: &mut PhotonImage) { let kernel = vec![0.0f32, -2.2, -0.6, -0.4, 2.8, -0.3, -0.8, -1.0, 2.7]; return conv(photon_image, kernel); } /// Apply an emboss effect to an image. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to apply an emboss effect: /// use photon::conv; /// photon::conv::emboss(img); /// ``` #[wasm_bindgen] pub fn emboss(photon_image: &mut PhotonImage) { let kernel = vec![-2.0f32, -1.0, 0.0, -1.0, 1.0, 1.0, 0.0, 1.0, 2.0]; return conv(photon_image, kernel); } /// Apply a horizontal Sobel filter to an image. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to apply a horizontal Sobel filter: /// use photon::conv; /// photon::conv::sobel_horizontal(img); /// ``` #[wasm_bindgen] pub fn sobel_horizontal(photon_image: &mut PhotonImage) { let kernel = vec![-1.0f32, -2.0, -1.0, 0.0, 0.0, 0.0, 1.0, 2.0, 1.0]; return conv(photon_image, kernel); } /// Apply a horizontal Prewitt convolution to an image. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to apply a horizontal Prewitt convolution effect: /// use photon::conv; /// photon::conv::prewitt_horizontal(img); /// ``` #[wasm_bindgen] pub fn prewitt_horizontal(photon_image: &mut PhotonImage) { let kernel = vec![5.0f32, -3.0, -3.0, 5.0, 0.0, -3.0, 5.0, -3.0, -3.0]; return conv(photon_image, kernel); } /// Apply a vertical Sobel filter to an image. /// /// # Arguments /// * `img` - A DynamicImage that contains a view into the image. /// /// # Example /// /// ``` /// // For example, to apply a vertical Sobel filter: /// use photon::conv; /// photon::conv::sobel_vertical(img); /// ``` #[wasm_bindgen] pub fn sobel_vertical(photon_image: &mut PhotonImage) { let kernel = vec![-1.0f32, 0.0, 1.0, -2.0, 0.0, 2.0, -1.0, 0.0, 1.0]; return conv(photon_image, kernel); } // // pub fn sobel_color(img: DynamicImage) -> DynamicImage { // // let kernel = [-1.0f32, 0.0, 1.0, -2.0, 0.0, 2.0, -1.0, 0.0, 1.0]; // // let mut filtered_img = img.filter3x3(&kernel); // // let (width, height) = filtered_img.dimensions(); // // for x in 0..width { // // for y in 0..height { // // let mut px = filtered_img.get_pixel(x, y); // // let r_val = px.data[0]; // // let g_val = px.data[1]; // // let b_val = px.data[2]; // // if r_val > 150 { // // let addition = 90; // // px.data[0] = if r_val as u32 + addition < 255 { r_val as u8 + addition as u8} else { 255 }; // // } // // if g_val > 150 { // // let addition = 60; // // px.data[1] = if g_val as u32 + addition < 255 { g_val as u8 + addition as u8} else { 255 }; // // } // // if b_val > 150 { // // let addition = 110; // // px.data[2] = if b_val as u32 + addition < 255 { b_val as u8 + addition as u8} else { 255 }; // // } // // filtered_img.put_pixel(x, y, px); // // } // // } // // return filtered_img; // // }