Comparison with other image processing frameworks
The following table may be useful for people migrating from other frameworks, and for identifying missing functionality in JuliaImages. Note that there are relevant packages which have not been integrated into more general frameworks or hosted at JuliaImages (e.g., DICOM.jl, etc.); such functionality is not documented here. This table is certainly not complete, and additions/corrections are welcome.
| Operation | JuliaImages | scikit-image + NumPy | Matlab (ImageProcessing + ComputerVision) |
|---|---|---|---|
| Input/output | |||
| Read image file | load | imread | imread |
| Write image file | save | imsave | imwrite |
| Image file metadata | magickinfo (ImageMagick.jl) | imfinfo | |
| Test images | testimage | astronaut etc. | “cameraman.tif” etc |
| Element type and color | |||
| Change numeric precision | float32, float64, n0f8, etc. | img_as_float etc | im2double etc |
| Change color space | HSV.(img) etc. | rgb2hsv etc. | rgb2lab etc. |
| Whitepoint adjustment | map whitebalance (Colors.jl) | makecform | |
| High dynamic range | tonemap | ||
| Intensity & quantization | |||
| Clamping | clamp01, clamp01nan | ||
| Linear scaling | LinearStretching, scaleminmax, etc. | rescale_intensity | imadjust |
| Nonlinear scaling | GammaCorrection | adjust_gamma | imadjust |
| Compute histogram | build_histogram | histogram | imhist |
| Histogram equalization | Equalization | equalize_hist | histeq |
| Adaptive equalization | AdaptiveEqualization | equalize_adapthist | adapthisteq |
| Reference histogram matching | Matching | match_histograms | imhistmatch |
| Quantization | map anonymous function | imquantize | |
| Threshold estimation | otsu_threshold | threshold_otsu etc. | graythresh etc. |
| Visualization and interactivity | |||
| Visualization | imshow (ImageView.jl), mosaicview | imshow | imshow, implay, montage, etc. |
| Contrast adjustment | ImageView.jl | imcontrast | |
| Pixel information | ImageView.jl | impixelinfo | |
| Distance measurement | imdistline | ||
| Text display of region | impixelregion | ||
| Zooming/scrolling | ImageView.jl and GtkUtilities.jl | imshow | imscrollpanel etc. |
| Interactive colormap | imcolormaptool | ||
| Region selection | RectangleTool etc. | imrect, imellipse, imfreehand, etc. | |
| Image comparison | colorview, mosaicview | imshowpair, imfuse | |
| Label colorization | IndirectArray, ColorizedArray | label2rgb | label2rgb |
| Annotation | |||
| Draw lines | line, line! (ImageDraw.jl) | line, polygon | line (visualization only) |
| Draw circles/ellipses | circle!, ellipse! (ImageDraw.jl) | circle, ellipse | viscircles (visualization only) |
| Transformations | |||
| Resize | imresize, restrict | resize | imresize |
| Image pyramids | gaussian_pyramid, restrict | pyramid_gaussian etc. | impyramid |
| Rotate | imrotate | rotate | imrotate |
| Translate | warp | imtranslate | |
| General geometric transformation | warp | warp | imwarp |
| Hough transform | hough_transform_standard, hough_circle_gradient | hough_circle, etc. | hough |
| Radon transform | radon, iradon | radon, iradon | |
| Distance transform | feature_transform, distance_transform | bwdist, graydist | |
| Registration | |||
| Statistics and image comparison | |||
| Image differences | ssd, sad, mse, rmse etc. | compare_mse, compare_nrmse | immse |
| Min/max/mean | minfinite, maxfinite, meanfinite | minimum, maximum, mean | nanmax, etc. |
| Entropy | entropy | entropy | entropy |
| quality assessment | PSNR, SSIM | compare_psnr, compare_ssim | psnr, ssim |
| colorfulness | colorfulness | ||
| Filtering and padding | |||
| Linear filtering | imfilter | gaussian, etc. | imfilter |
| Median/max/quantile filtering | mapwindow | median/max etc. | nlfilter, medfilt2, etc. |
| Other nonlinear filtering (e.g., std) | mapwindow | nlfilter, stdfilt | |
| Gradients | imgradients | sobel_h etc. | imgradientxy etc. |
| Integral image | integral_image | integral_image | integralImage |
| Padding | padarray | pad | padarray |
| Deconvolution | wiener (Deconvolution.jl) | richardson_lucy, weiner, etc. | deconvlucy, deconvwnr, etc. |
| Features | |||
| Edge detection | imedge, canny | canny | edge |
| Corner detection | imcorner, fastcorners | corner_harris etc. | detectFASTFeatures |
| Blob detection | blob_LoG | blob_log etc. | |
| Local binary patterns | lbp etc. (ImageFeatures.jl) | local_binary_pattern | extractLBPFeatures |
| Histogram of oriented gradients | HOG (ImageFeatures.jl) | hog | extractHOGFeatures |
| Gray-level co-occurence | glcm etc. (ImageFeatures.jl) | greycomatrix | graycomatrix |
| Point descriptors | BRIEF, ORB, etc. (ImageFeatures.jl) | BRIEF, ORB, etc. | detectBRISK etc. |
| Feature matching | match_keypoints (ImageFeatures.jl) | match_descriptors | matchFeatures |
| Segmentation | |||
| Connected components | label_components | label | bwconncomp, bwlabel |
| Foreground/background | active_contour | activecontour | |
| Clustering | kmeans, fuzzy_cmeans, mean_shift (Clustering.jl) | quickshift, slic | |
| Marker segmentation | seeded_region_growing | random_walker | imsegfmm |
| Watershed | watershed | watershed | watershed |
| Morphological operations | |||
| Dilation | dilate | dilation, binary_dilation | imdilate |
| Erosion | erode | ||
| Opening | opening | opening | imopen |
| Closing | closing | closing | imclose |
| Top-hat filtering | tophat | tophat etc. | imtophat |
| Bottom-hat filtering | bothat | bottomhat | imbothat |
| Regional max/min | mapwindow | filters.rank.maximum etc. | imregionalmax etc. |
| Convex hull | convexhull | convex_hull_image | bwconvhull |
| Borders | clearborder | clear_border | imclearborder |
| Boundaries | find_boundaries | boundarymask | |
| Filling | imfill | remove_small_holes | imfill, regionfill |