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hdrread

Read high dynamic range (HDR) image

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Syntax

hdr = hdrread(filename)

Description

hdr = hdrread(filename) reads the high dynamic range (HDR) image, hdr, from the file specified by filename. For scene-referred data sets, pixel values usually are scene illumination in radiance units.

example

Examples

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Open Live Script

Read high dynamic range image into the workspace.

hdr = hdrread('office.hdr');

Convert the HDR image to a lower dynamic range, suitable for display.

rgb = tonemap(hdr);

Display the image.

imshow(rgb);

Figure contains an axes object. The hidden axes object contains an object of type image.

Input Arguments

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File name of HDR image, specified as a character vector or string scalar.

Example: 'office.hdr' or "office.hdr"

Data Types: char | string

Output Arguments

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HDR image, returned as an m-by-n-by-3 numeric array with values in the range [0,Inf).

Data Types: single

Tips

  • To display HDR images, use an appropriate tone-mapping function, such as tonemap.

References

[1] Larson, Greg W. "Radiance File Formats". http://radsite.lbl.gov/radiance/refer/filefmts.pdf

Version History

Introduced in R2007b

See Also

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