Objective c 目的-C关于CIHistogramDisplayFilter的快速转换问题

我用Objective-C显示了一个柱状图，这很好用。然而，我很难将其转换为Swift

目标-C

//Show Histogram
        CVPixelBufferRef pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
        CFDictionaryRef attachments = CMCopyDictionaryOfAttachments(kCFAllocatorDefault, sampleBuffer, kCMAttachmentMode_ShouldPropagate);
        CIImage *ciImage = [[CIImage alloc] initWithCVPixelBuffer:pixelBuffer options:(__bridge NSDictionary *)attachments];


        NSUInteger count = 256;
        count = count <= 256 ? count : 256;
        count = count >= 1 ? count : 1;


        NSDictionary *params = @{kCIInputImageKey: ciImage,
                                 kCIInputExtentKey: [CIVector vectorWithCGRect:[ciImage extent]],
                                 @"inputCount": @(256), @"inputScale": @(200)
                                 };

        CIFilter *filter = [CIFilter filterWithName:@"CIAreaHistogram"
                                withInputParameters:params];


        CIImage *outImage = [filter outputImage];
    //---------------------------------------------

        CIContext *context = [CIContext contextWithOptions:nil];

        NSDictionary *params2 = @{
                                  kCIInputImageKey: outImage
                                  };
        CIFilter *filter2 = [CIFilter filterWithName:@"CIHistogramDisplayFilter"
                                 withInputParameters:params2];

        CIImage *outputImage = [filter2 outputImage];
        CGRect outExtent = [outputImage extent];
        CGImageRef cgImage = [context createCGImage:outputImage
                                           fromRect:outExtent];

        UIImage *outImage2 = [UIImage imageWithCGImage:cgImage];
        CGImageRelease(cgImage);

        // resize
        UIImage *resized = [self resizeImage:outImage2
                                 withQuality:kCGInterpolationNone
                                        rate:2.5];
        //Remove the default grey background
        resized = [self removeColorFromImage:resized grayLevel:137];

        dispatch_async(dispatch_get_main_queue(),
        ^{
            self.histogramView.image = resized;
        });

最后一行给出了错误：

Argument labels '(cVPixelBuffer:, options:)' do not match any available overloads

//显示直方图——Swift版本
var pixelBuffer:CVPixelBufferRef=CMSampleBufferGetImageBuffer（sampleBuffer）！
变量附件：CFDictionaryRef=CMCopyDictionaryOfAttachments（kCFAllocatorDefault、sampleBuffer、kCMAttachmentMode_ShouldPropagate）！
var ciImage:ciImage=ciImage（CVPixelBuffer:pixelBuffer，选项：附件为？[String:AnyObject]）
变量计数=256
计数=计数=1？计数：1
设params=[kCIInputImageKey:ciImage，
kCIInputExtentKey:CIVector.init（CGRect:ciImage.extent），
“输入计数”：256，“输入比例”：200]
让筛选器：CIFilter！=CIFilter（名称：“CIAreaHistogram”，带输入参数：params）
让输出图像：CIImage=（过滤器？.outputImage）！
//---------------------------------------------
let context:CIContext=CIContext（选项：nil）
设params2=[kCIInputImageKey:outImage]
let filter2=CIFilter（名称：“CIHistogramDisplayFilter”，输入参数：params2）
让outputImage:CIImage=filter2！。输出图像！
让outExtent:CGRect=outputImage.extent
让cgImage:CGImageRef=context.createCGImage（outputImage，fromRect:outExtent）
让outImage2:UIImage=UIImage（CGImage:CGImage）
//调整大小
设置大小：UIImage=self.resizeImage（outImage2，带质量：cg插值。无，速率：2.5）
//删除默认的灰色背景
resized=self.removeColorFromImage（已调整大小，灰度：137）
dispatch\u async（dispatch\u get\u main\u queue（））{
self.historogramview.image=已调整大小
}

按⇧⌘O（O不是零），然后

CIIma

，然后

return

然后检查init方法的拼写。您有一个输入错误：使用

CVPixelBuffer

，而不是

CVPixelBuffer

@gizmodo，您尝试过我的转换吗？工作得很好！非常感谢。工作完美！非常感谢。

Argument labels '(cVPixelBuffer:, options:)' do not match any available overloads

//Show Histogram -- Swift version
    var pixelBuffer: CVPixelBufferRef = CMSampleBufferGetImageBuffer(sampleBuffer)!
    var attachments: CFDictionaryRef = CMCopyDictionaryOfAttachments(kCFAllocatorDefault, sampleBuffer, kCMAttachmentMode_ShouldPropagate)!
    var ciImage: CIImage = CIImage(CVPixelBuffer: pixelBuffer, options: attachments as? [String : AnyObject])

    var count = 256
    count = count <= 256 ? count : 256
    count = count >= 1 ? count : 1

    let params = [kCIInputImageKey: ciImage,
        kCIInputExtentKey:CIVector.init(CGRect: ciImage.extent),
        "inputCount":256, "inputScale":200]

    let filter:CIFilter! = CIFilter(name: "CIAreaHistogram" , withInputParameters: params)


    let outImage: CIImage = (filter?.outputImage)!
    //---------------------------------------------

    let context:CIContext = CIContext(options: nil)

    let params2 = [kCIInputImageKey: outImage]


    let filter2 = CIFilter(name: "CIHistogramDisplayFilter",withInputParameters: params2)

    let outputImage:CIImage = filter2!.outputImage!
    let outExtent:CGRect = outputImage.extent

    let cgImage:CGImageRef = context.createCGImage(outputImage, fromRect: outExtent)

    let outImage2:UIImage = UIImage(CGImage: cgImage)

    // resize

    let resized:UIImage = self.resizeImage(outImage2,withQuality:CGInterpolation.None,rate:2.5)

    //Remove the default grey background

    resized = self.removeColorFromImage(resized, grayLevel:137)


    dispatch_async(dispatch_get_main_queue()) {
        self.histogramView.image = resized
    }