/__w/Img2Num/Img2Num/doxygen/img2num.h.dox File Reference

Macros
#define	IMG2NUM_H_GAUSSIAN_BLUR_DOC
	Apply a Gaussian blur to an image using FFT. More...
#define	IMG2NUM_H_INVERT_IMAGE_DOC
	Invert the pixel values of an image. More...
#define	IMG2NUM_H_THRESHOLD_IMAGE_DOC
	Apply a thresholding operation to an image. More...
#define	IMG2NUM_H_BLACK_THRESHOLD_IMAGE_DOC
	Apply black-thresholding to an image. More...
#define	IMG2NUM_H_KMEANS_DOC
	Perform k-means clustering on image data. More...
#define	IMG2NUM_H_BILATERAL_FILTER_DOC
	Apply bilateral filtering to an image. More...
#define	IMG2NUM_H_LABELS_TO_SVG_DOC
	Convert labeled regions of an image into an SVG string. More...

Macro Definition Documentation

IMG2NUM_H_BILATERAL_FILTER_DOC

#define IMG2NUM_H_BILATERAL_FILTER_DOC

Apply bilateral filtering to an image.

Parameters

image	Pointer to RGBA pixel buffer.
width	Width of the image in pixels.
height	Height of the image in pixels.
sigma_spatial	Standard deviation for spatial Gaussian (proximity weight).
sigma_range	Standard deviation for range Gaussian (intensity similarity weight).
color_space	Color space flag (0 = CIE LAB, 1 = RGB).

Note

The filter modifies the image buffer in-place.

Dox File: doxygen/img2num.h.dox

IMG2NUM_H_BLACK_THRESHOLD_IMAGE_DOC

#define IMG2NUM_H_BLACK_THRESHOLD_IMAGE_DOC

Apply black-thresholding to an image.

Parameters

ptr	Pointer to the image buffer.
width	Width of the image in pixels.
height	Height of the image in pixels.
num_thresholds	Number of thresholds to apply.

Note

Similar to threshold_image but prioritizes darker pixels.

Dox File: doxygen/img2num.h.dox

IMG2NUM_H_GAUSSIAN_BLUR_DOC

#define IMG2NUM_H_GAUSSIAN_BLUR_DOC

Apply a Gaussian blur to an image using FFT.

Parameters

image	Pointer to the image buffer (RGBA).
width	Width of the image in pixels.
height	Height of the image in pixels.
sigma	Standard deviation for Gaussian kernel.

Note

The operation modifies the image buffer in-place.

Dox File: doxygen/img2num.h.dox

IMG2NUM_H_INVERT_IMAGE_DOC

#define IMG2NUM_H_INVERT_IMAGE_DOC

Invert the pixel values of an image.

Parameters

ptr	Pointer to the image buffer.
width	Width of the image in pixels.
height	Height of the image in pixels.

Note

Each pixel value is replaced by 255 - original_value.

Dox File: doxygen/img2num.h.dox

IMG2NUM_H_KMEANS_DOC

#define IMG2NUM_H_KMEANS_DOC

Perform k-means clustering on image data.

Parameters

data	Pointer to input image data buffer.
out_data	Pointer to output buffer where clustered pixel values are stored.
out_labels	Pointer to output buffer for cluster labels per pixel.
width	Width of the image in pixels.
height	Height of the image in pixels.
k	Number of clusters to compute.
max_iter	Maximum number of iterations for the algorithm.
color_space	Color space flag (0 = CIE LAB, 1 = RGB).

Note

The function does not modify the input buffer.

Dox File: doxygen/img2num.h.dox

IMG2NUM_H_LABELS_TO_SVG_DOC

#define IMG2NUM_H_LABELS_TO_SVG_DOC

Convert labeled regions of an image into an SVG string.

Parameters

data	Pointer to image data buffer.
labels	Pointer to label buffer, indicating region for each pixel.
width	Width of the image in pixels.
height	Height of the image in pixels.
min_area	Minimum area (in pixels) for a region to be included in the SVG.
draw_contour_borders	If true, contours of labeled regions will be drawn.

Returns

Pointer to a dynamically allocated C-string containing the SVG data.

Note

Caller is responsible for freeing the returned string.

Dox File: doxygen/img2num.h.dox

IMG2NUM_H_THRESHOLD_IMAGE_DOC

#define IMG2NUM_H_THRESHOLD_IMAGE_DOC

Apply a thresholding operation to an image.

Parameters

ptr	Pointer to the image buffer.
width	Width of the image in pixels.
height	Height of the image in pixels.
num_thresholds	Number of thresholds to apply.

Note

Thresholds split pixel intensity ranges into discrete levels.

Dox File: doxygen/img2num.h.dox