VistaIOBandInterp(3)

✨ VistaIOBandInterp ✨ (section 3, library functions manual, bestie)

okay so this is VistaIOBandInterp from the VistaIO library manual, and it's literally the girlies who tell you how to read an image's bands 💅 no cap, it's giving "who are these bands and what do they MEAN".

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🌸 NAME 🌸

VistaIOImageFrameInterp, VistaIOImageViewpointInterp, VistaIOImageColorInterp, VistaIOImageComponentInterp — image band interpretation 🎀

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✨ SYNOPSIS ✨

#include <vistaio.h>

VistaIOBandInterp VistaIOImageFrameInterp (VistaIOImage image)

VistaIOBandInterp VistaIOImageViewpointInterp (VistaIOImage image)

VistaIOBandInterp VistaIOImageColorInterp (VistaIOImage image)

VistaIOBandInterp VistaIOImageComponentInterp (VistaIOImage image)

typedef enum {
    VistaIOBandInterpNone,    /* no interpretation */
    VistaIOBandInterpOther,   /* unknown interpretation */
    VistaIOBandInterpStereoPair,/* describing camera viewpoints */
    VistaIOBandInterpRGB,     /* describing color channels */
    VistaIOBandInterpComplex, /* describing vector components */
    VistaIOBandInterpGradient,
    VistaIOBandInterpIntensity,
    VistaIOBandInterpOrientation
} VistaIOBandInterp;

like look at that enum, it's a whole mood board of possibilities 💖

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🫶 ARGUMENTS 🫶

• image — the image you're asking about, queen. You pass in the image whose band interpretation info you want, and that's the whole assignment. 🦋

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💜 DESCRIPTION 💜

So there's these four routines and they all do basically the same cute thing: they tell you how an image's bands are supposed to be interpreted. No guessing, no vibes-only reading, just facts.

Each one reports on one of four band interpretation dimensions:

1. motion sequence frame
2. camera viewpoint
3. color channel
4. vector component

four routines, four dimensions, one iconic little squad 🎀✨

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👑 RETURN VALUES 👑

Each routine looks at the size of its dimension (like nframes, bestie) plus any band interpretation attribute for that dimension (like frame_interp) and hands you back a value based on those two things. Specifically, and this part is important so read it fr fr:

• if the size of the dimension is 1 and there is no band interpretation attribute, it returns VistaIOBandInterpNone
• VistaIOImageViewpointInterp returns VistaIOBandInterpStereoPair if image is a standard stereo pair (i.e., nviewpoints: 2 and viewpoint_interp: stereo_pair) 🫶
• VistaIOImageColorInterp returns VistaIOBandInterpRGB if image is a standard RGB color image (i.e., ncolors: 3 and color_interp: rgb) 🌈
• VistaIOImageComponentInterp returns VistaIOBandInterpComplex if image is a standard complex image (i.e., ncomponents: 2 and component_interp: complex) ✨
• VistaIOImageComponentInterp returns VistaIOBandInterpGradient if image is a standard gradient image (i.e., ncomponents: 1 or 2, and component_interp: gradient) 🦋
• VistaIOImageComponentInterp returns VistaIOBandInterpIntensity if image is a standard intensity image (i.e., ncomponents: 1 and component_interp: intensity) 💡
• VistaIOImageComponentInterp returns VistaIOBandInterpOrientation if image is a standard orientation image (i.e., ncomponents: 1 and component_interp: orientation) 🧭
• each routine returns VistaIOBandInterpOther otherwise 💀

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🌟 SEE ALSO 🌟

• VistaIOSetBandInterp(3)
• VistaIOImage(3)

go read those too, iykyk 📚✨

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🚨 DIAGNOSTICS 🚨

a warning gets issued and VistaIOBandInterpOther gets returned if a dimension's size (like ncolors) and the corresponding band interpretation attribute (like color_interp) are inconsistent. messy. inconsistent. not slaying.

a warning also gets issued if the product of the four dimension's sizes does not equal the total number of bands in the image. like the math is not mathing 😭

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💖 AUTHOR 💖

• Art Pope <pope@cs.ubc.ca>
• Adaption to vistaio: Gert Wollny <gw.fossdev@gmail.com>

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and that's the whole page bestie!! this was VistaIO Version 1.2.14, dated 24 April 1993 — yes she's an elder but she's still iconic, periodt 💅✨🎀