Tools used for LDR/HDR environment map (IBL) handling and IO.

envmap.EnvironmentMap Environment map class. Converts easily between those formats:

• latlong (equirectangular)
• angular
• sphere
• cube
• skyangular
• skylatlong

Available methods:

• .copy(): Deepcopy the instance.
• .solidAngles(): Computes the per-pixel solid angles of the current representation.
• .convertTo(targetFormat): Convert to the targetFormat.
• .rotate(format, rotation): Rotate the environment map using format DCM. Soon will support Euler Angles, Euler Vector and Quaternions.
• .resize(targetSize): Resize the environment map. Be cautious, this function does not ensure energy is preserved!
• .toIntensity(): Convert to grayscale.
• .getMeanLightVectors(normals): Compute the mean light vector of the environment map for the given normals.

Internal functions:

• .imageCoordinates(): returns the (u, v) coordinates at teach pixel center.
• .worldCoordinates(): returns the (x, y, z) world coordinates for each pixel center.
• .interpolate(u, v, valid, method='linear'): interpolates

imread and imwrite/imsave supporting the folloring formats:

• exr (ezexr)
• cr2, nef, raw (dcraw)
• hdr, pic (custom, beta)
• tiff (tifffile or scipy)
• All the formats supported by scipy.io

Internal exr reader and writer.

• getMaskDerivatives(mask): creates the dx+dy from a binary mask.
• NfromZ: derivates the normals from a depth map surf.
• ZfromN: Integrates a depth map from a normal map normals.
• display.plotDepth: Creates a 3-subplot figure that shows the depth map Z and two side views.
• spharm.FSHT Fash Spherical Harmonic Transform
• spharm.iFSHT inverse Fash Spherical Harmonic Transform
• spharm.sphericalHarmonicTransform Spherical Harmonic Transform
• spharm.inverseSphericalHarmonicTransform inverse Spherical Harmonic Transform

Tonemapping using pfstools.

• Improved display for environment maps (change intensity with keystroke/button)
• Standalone ezexr on all platforms
• add worldCoordinates() output in spherical coordinates instead of (x, y, z)
• Add assert that data is float32 in convertTo/resize (internal bugs in scipy interpolation)
• bugfix: .rotate() not working on grayscale (2D) data
• bugfix: .convertTo() not working on grayscale (2D) data