opencv_filter_2d · Custom convolution

2D convolution with any kernel you write down as a numeric matrix.

2026-07-10 · 1 min · mangoeffect

opencv_gabor_filter · Gabor filter

Directional texture filtering with Gabor kernels — a classic for fingerprint/fabric analysis.

2026-07-10 · 1 min · mangoeffect

opencv_gaussian_blur_filter · Gaussian blur

Gaussian-weighted blur: natural smoothing, the default choice for denoising.

2026-07-10 · 1 min · mangoeffect

opencv_image_read · Read image

Reads one image from disk (png / jpg / bmp / tiff / webp …) as the graph’s input source.

2026-07-10 · 1 min · mangoeffect

opencv_image_write · Write image

Writes the upstream image to a file; the format is inferred from the extension.

2026-07-10 · 1 min · mangoeffect

opencv_laplacian_filter · Laplacian

Second-derivative operator: isotropic edge/texture response, used for sharpening and edge detection.

2026-07-10 · 1 min · mangoeffect

opencv_median_blur_filter · Median blur

Median filter: takes the median in the window — extremely effective on salt-and-pepper noise, edge-preserving.

2026-07-10 · 1 min · mangoeffect

opencv_morphology_ex · Morphology combinations

Open/close/gradient/top-hat/black-hat: the composed morphology operations in one node.

2026-07-10 · 1 min · mangoeffect

opencv_pyr_down · Pyr down

Gaussian blur + halved size: anti-aliased downsampling.

2026-07-10 · 1 min · mangoeffect

opencv_pyr_up · Pyr up

Upscale ×2 then blur: the pyramid inverse.

2026-07-10 · 1 min · mangoeffect