Riferimento framework MLKitVision
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GMLImage
@interface GMLImage : NSObject
Un'immagine utilizzata nel machine learning on-device.
-
Larghezza dell'immagine in pixel.
Dichiarazione
Objective-C
@property (nonatomic, readonly) CGFloat width;
-
Altezza dell'immagine in pixel.
Dichiarazione
Objective-C
@property (nonatomic, readonly) CGFloat height;
-
L'orientamento di visualizzazione dell'immagine. Se imageSourceType
è .image
, il valore predefinito è
image.imageOrientation
; altrimenti il valore predefinito è .up
.
Dichiarazione
Objective-C
@property (nonatomic) int orientation;
-
Il tipo di origine dell'immagine.
-
Dichiarazione
Objective-C
@property (nonatomic, readonly, nullable) int *image;
-
Dichiarazione
Objective-C
@property (nonatomic, readonly, nullable) CVPixelBufferRef pixelBuffer;
-
Il buffer del campione di origine. nil
se imageSourceType
non è .sampleBuffer
.
Dichiarazione
Objective-C
@property (nonatomic, readonly, nullable) CMSampleBufferRef sampleBuffer;
-
Inizializza un oggetto MLImage
con l'immagine specificata.
Dichiarazione
Objective-C
- (nullable instancetype)initWithImage:(id)image;
Parametri
image
|
L'immagine da utilizzare come fonte. La relativa proprietà CGImage non deve essere NULL .
|
Valore restituito
Una nuova istanza MLImage
con l'immagine specificata come origine. nil
se image
specificato
è nil
o non valido.
-
Inizializza un oggetto MLImage
con il buffer di pixel specificato.
Dichiarazione
Objective-C
- (nullable instancetype)initWithPixelBuffer:
(nonnull CVPixelBufferRef)pixelBuffer;
Parametri
pixelBuffer
|
Il buffer di pixel da utilizzare come origine. Verrà conservato dal nuovo
MLImage per la durata del suo ciclo di vita.
|
Valore restituito
Una nuova istanza MLImage
con il buffer di pixel specificato come origine. nil
se la data specificata
buffer di pixel nil
o non valido.
-
Inizializza un oggetto MLImage
con il buffer di esempio specificato.
Dichiarazione
Objective-C
- (nullable instancetype)initWithSampleBuffer:
(nonnull CMSampleBufferRef)sampleBuffer;
Parametri
sampleBuffer
|
Il buffer di esempio da utilizzare come origine. Verrà conservato dal nuovo
MLImage per la durata del suo ciclo di vita. Il buffer di esempio deve essere basato su una
buffer di pixel (dati non compressi). In pratica, dovrebbe essere l'output video della videocamera
su un dispositivo iOS, non altri tipi arbitrari di CMSampleBuffer .
|
Valore restituito
Una nuova istanza MLImage
con il buffer di esempio specificato come origine. nil
se la data specificata
buffer di campionamento nil
o non valido.
-
Dichiarazione
Objective-C
- (nonnull instancetype)init;
Salvo quando diversamente specificato, i contenuti di questa pagina sono concessi in base alla licenza Creative Commons Attribution 4.0, mentre gli esempi di codice sono concessi in base alla licenza Apache 2.0. Per ulteriori dettagli, consulta le norme del sito di Google Developers. Java è un marchio registrato di Oracle e/o delle sue consociate.
Ultimo aggiornamento 2025-07-25 UTC.
[null,null,["Ultimo aggiornamento 2025-07-25 UTC."],[[["\u003cp\u003e\u003ccode\u003eGMLImage\u003c/code\u003e is an object used for on-device machine learning representing an image.\u003c/p\u003e\n"],["\u003cp\u003eIt can be initialized with an image, a pixel buffer, or a sample buffer, defining the image source.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eGMLImage\u003c/code\u003e provides read-only access to properties like width, height, orientation, and the image source type.\u003c/p\u003e\n"],["\u003cp\u003eIf initialized with an image, the \u003ccode\u003eimage\u003c/code\u003e property holds the source image; otherwise, it's \u003ccode\u003enil\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eSimilarly, \u003ccode\u003epixelBuffer\u003c/code\u003e and \u003ccode\u003esampleBuffer\u003c/code\u003e properties hold the respective source data depending on the initialization type, being \u003ccode\u003enil\u003c/code\u003e otherwise.\u003c/p\u003e\n"]]],["GMLImage manages images for on-device machine learning, defining properties like `width`, `height`, `orientation`, and `imageSourceType`. It can be initialized using `-initWithImage:`, `-initWithPixelBuffer:`, or `-initWithSampleBuffer:`, accepting an image, pixel buffer, or sample buffer respectively as the source. It also exposes the source data through read-only properties, such as `image`, `pixelBuffer`, and `sampleBuffer`, depending on `imageSourceType`. The `-init` method is unavailable.\n"],null,["# MLKitVision Framework Reference\n\nGMLImage\n========\n\n\n @interface GMLImage : NSObject\n\nAn image used in on-device machine learning.\n- `\n ``\n ``\n `\n\n ### [width](#/c:objc(cs)GMLImage(py)width)\n\n `\n ` \n Width of the image in pixels. \n\n #### Declaration\n\n Objective-C \n\n @property (nonatomic, readonly) CGFloat width;\n\n- `\n ``\n ``\n `\n\n ### [height](#/c:objc(cs)GMLImage(py)height)\n\n `\n ` \n Height of the image in pixels. \n\n #### Declaration\n\n Objective-C \n\n @property (nonatomic, readonly) CGFloat height;\n\n- `\n ``\n ``\n `\n\n ### [orientation](#/c:objc(cs)GMLImage(py)orientation)\n\n `\n ` \n The display orientation of the image. If [imageSourceType](../Classes/GMLImage.html#/c:objc(cs)GMLImage(py)imageSourceType) is [.image](../Classes/GMLImage.html#/c:objc(cs)GMLImage(py)image), the default value is\n `image.imageOrientation`; otherwise the default value is `.up`. \n\n #### Declaration\n\n Objective-C \n\n @property (nonatomic) int orientation;\n\n- `\n ``\n ``\n `\n\n ### [imageSourceType](#/c:objc(cs)GMLImage(py)imageSourceType)\n\n `\n ` \n The type of the image source. \n\n #### Declaration\n\n Objective-C \n\n @property (nonatomic, readonly) ../Type-Definitions.html#/c:GMLImage.h@T@GMLImageSourceType imageSourceType;\n\n- `\n ``\n ``\n `\n\n ### [image](#/c:objc(cs)GMLImage(py)image)\n\n `\n ` \n The source image. `nil` if [imageSourceType](../Classes/GMLImage.html#/c:objc(cs)GMLImage(py)imageSourceType) is not `.image`. \n\n #### Declaration\n\n Objective-C \n\n @property (nonatomic, readonly, nullable) int *image;\n\n- `\n ``\n ``\n `\n\n ### [pixelBuffer](#/c:objc(cs)GMLImage(py)pixelBuffer)\n\n `\n ` \n The source pixel buffer. `nil` if [imageSourceType](../Classes/GMLImage.html#/c:objc(cs)GMLImage(py)imageSourceType) is not `.pixelBuffer`. \n\n #### Declaration\n\n Objective-C \n\n @property (nonatomic, readonly, nullable) CVPixelBufferRef pixelBuffer;\n\n- `\n ``\n ``\n `\n\n ### [sampleBuffer](#/c:objc(cs)GMLImage(py)sampleBuffer)\n\n `\n ` \n The source sample buffer. `nil` if [imageSourceType](../Classes/GMLImage.html#/c:objc(cs)GMLImage(py)imageSourceType) is not `.sampleBuffer`. \n\n #### Declaration\n\n Objective-C \n\n @property (nonatomic, readonly, nullable) CMSampleBufferRef sampleBuffer;\n\n- `\n ``\n ``\n `\n\n ### [-initWithImage:](#/c:objc(cs)GMLImage(im)initWithImage:)\n\n `\n ` \n Initializes an `MLImage` object with the given image. \n\n #### Declaration\n\n Objective-C \n\n - (nullable instancetype)initWithImage:(id)image;\n\n #### Parameters\n\n |---------------|----------------------------------------------------------------------------|\n | ` `*image*` ` | The image to use as the source. Its `CGImage` property must not be `NULL`. |\n\n #### Return Value\n\n A new `MLImage` instance with the given image as the source. `nil` if the given [image](../Classes/GMLImage.html#/c:objc(cs)GMLImage(py)image)\n is `nil` or invalid.\n- `\n ``\n ``\n `\n\n ### [-initWithPixelBuffer:](#/c:objc(cs)GMLImage(im)initWithPixelBuffer:)\n\n `\n ` \n Initializes an `MLImage` object with the given pixel buffer. \n\n #### Declaration\n\n Objective-C \n\n - (nullable instancetype)initWithPixelBuffer:\n (nonnull CVPixelBufferRef)pixelBuffer;\n\n #### Parameters\n\n |---------------------|-----------------------------------------------------------------------------------------------------------------------------|\n | ` `*pixelBuffer*` ` | The pixel buffer to use as the source. It will be retained by the new `MLImage` instance for the duration of its lifecycle. |\n\n #### Return Value\n\n A new `MLImage` instance with the given pixel buffer as the source. `nil` if the given\n pixel buffer is `nil` or invalid.\n- `\n ``\n ``\n `\n\n ### [-initWithSampleBuffer:](#/c:objc(cs)GMLImage(im)initWithSampleBuffer:)\n\n `\n ` \n Initializes an `MLImage` object with the given sample buffer. \n\n #### Declaration\n\n Objective-C \n\n - (nullable instancetype)initWithSampleBuffer:\n (nonnull CMSampleBufferRef)sampleBuffer;\n\n #### Parameters\n\n |----------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n | ` `*sampleBuffer*` ` | The sample buffer to use as the source. It will be retained by the new `MLImage` instance for the duration of its lifecycle. The sample buffer must be based on a pixel buffer (not compressed data). In practice, it should be the video output of the camera on an iOS device, not other arbitrary types of `CMSampleBuffer`s. |\n\n #### Return Value\n\n A new `MLImage` instance with the given sample buffer as the source. `nil` if the given\n sample buffer is `nil` or invalid.\n- `\n ``\n ``\n `\n\n ### [-init](#/c:objc(cs)GMLImage(im)init)\n\n `\n ` \n Unavailable. \n\n #### Declaration\n\n Objective-C \n\n - (nonnull instancetype)init;"]]