Esta página aún no se ha traducido para esta versión. Puede ver la versión más reciente de esta página en inglés.

Transformaciones de imágenes

Realizar transformaciones de Fourier, coseno discreto, radón y haz de abanico

Funciones

bwdistDistancia transformada de la imagen binaria
bwdistgeodesicTransformada de distancia geodésica de imagen binaria
graydistTransformación de la distancia ponderada en gris de la imagen en escala de gris
houghHough Transform
houghlinesExtraer segmentos de línea basados en la transformación Hough
houghpeaksIdentificar los picos en la transformación Hough
dct22-D el coseno discreto transforma
dctmtxMatriz de transformación de coseno discreta
fan2paraConvertir proyecciones de haz de abanico a viga paralela
fanbeamTransformación del haz de abanico
idct2transformada de coseno discreto inversa 2-D
ifanbeamTransformación inversa del haz de abanicos
iradonTransformación de radón inversa
para2fanConvertir proyecciones de haz paralelo a la barra de ventilador
radonTransformación de radón
fft22-D fast Fourier transform
fftshiftShift zero-frequency component to center of spectrum
ifft22-D inverse fast Fourier transform
ifftshiftInverse zero-frequency shift

Temas

Fourier Transform

Learn about the Fourier transform and some of its applications in image processing, particularly in image filtering.

Discrete Cosine Transform

Learn about the discrete cosine transform (DCT) of an image and its applications, particularly in image compression.

Hough Transform

The Hough transform detects lines in an image, including lines tilted at arbitrary angles from vertical and horizontal. The Hough transform tends to be quick, but can exhibit artifacts.

Radon Transform

The Radon transform detects lines in an image, including lines tilted at arbitrary angles from vertical and horizontal. The Radon transform tends to be more accurate at the cost of longer computation time.

The Inverse Radon Transformation

The inverse Radon transform reconstructs an image from a set of parallel-beam projection data across many projection angles.

Detect Lines Using the Radon Transform

This example shows how to detect lines and identify the strongest lines in an image using the Radon transform.

Fan-Beam Projection

Use fan-beam projection and reconstruction when projections of an image are acquired along paths radiating from a point source. Medical tomography is a common application of fan-beam projection.