2013-04-24 62 views
-1

下面的代码没有在matlab中运行。我想在matlab.Can匿名函数请你告诉我,什么是错在这条线:MATLAB代码纠正

Inv_Y_Quant = blockproc(BB,[8 8], InvQuant); 

和相关的代码如下:

clear all 
clc 

I = imread('cameraman.tif'); 
% convert it to double 
I = im2double(I); 
% "Trim by 128" 
I = I-128; 
% Generate the DCT matrix 
T = dctmtx(8); 
% Generate Function handler for DCT 
MyFun1 = @(block_struct) T * block_struct.data * T'; 
% BlockProcess the DCT the function for 8 by 8 blocks 
B = blockproc(I,[8 8],MyFun1); 
% Form the Quantization matrix 
Q = [ 16 11 10 16 24 40 51 61 
12 12 14 19 26 58 60 55 
14 13 16 24 40 57 69 56 
14 17 22 29 51 87 80 62 
18 22 37 56 68 109 103 77 
24 35 55 64 81 104 113 92 
49 64 78 87 103 121 120 101 
72 92 95 98 112 100 103 99]; 
% now generate function handler for the quantization 
MyFun2 = @(block_struct)block_struct.data ./Q; 
% perform the quantization 
BB = blockproc(B,[8 8],MyFun2); 
InvQuant = @(block_struct)round(block_struct.data.*Q); 
Inv_Y_Quant = blockproc(BB,[8 8], InvQuant); 
InvDct = @(block_struct)dct_matrix'*block_struct.data*dct_matrix; 
Z = blockproc(Inv_Y_Quant, [8 8], InvDct); 
Z = Z+128; 
figure, imshow(Z) 
Z = uint8(Z); 
figure, imshow(Z) 

%imwrite(Z, 'Mar7.tif'); 
%b = imread('Mar7.tif'); 
%imshow(b) 
+5

Matlab给你什么错误?究竟是什么问题? – Shai 2013-04-24 11:50:12

+0

错误的原因是: 未定义的函数或变量'dct_matrix'。 错误==> @(block_struct)dct_matrix'* block_struct.data * dct_matrix 错误==> blockprocFunDispatcher在14 output_block =乐趣(block_struct); 错误==> blockprocInMemory在71 [ul_output fun_nargout] = blockprocFunDispatcher(乐趣,block_struct,... 错误==> blockproc在248 result_image = blockprocInMemory(一,BLOCK_SIZE,乐趣,border_size, ... 错误在==> matlab5在31 Z = blockproc(Inv_Y_Quant,[8 8],InvDct); – 2013-04-24 11:53:14

回答

1

,正如你在评论中写道,这一问题是您尝试在匿名函数InvDct中使用数组dct_matrix。这个数组在您的代码中定义为从不

您是否打算使用矩阵T(init为dctmtx(8))?

编辑:
当使用匿名函数的参数(如在该示例中dct_matrix),被定义匿名函数之前这些参数应该被定义。

+0

可以告诉我whr和hw shld我定义数组??谢谢 – 2013-04-24 11:59:36

+2

我不是语言纯粹主义者,但写标准英语而不是街道块呢? – fpe 2013-04-24 12:07:47

+0

@AkshayaGangineni - 请参阅我的编辑 – Shai 2013-04-24 13:05:58