matlab 语句H = freqz2(h,PQ(1),PQ(2));是什么意思?上一句是PQ = paddedsize(size(f));
help freqz2FREQZ2 2-D frequency response.[H,Fx,Fy] = FREQZ2(h,Nx,Ny) returns H,the Ny-by-Nx frequency responseof h,and the frequency vectors Fx (of length Nx) and Fy (of lengthNy).h is a two-dimension...
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其他类似问题
扫描下载二维码What size（s） do you have？这句话的”size“应不应该加s？如果都可以，有什么区别？
沉默火圣0511
这个句子好像有点问题哦…
不用S这一般是问衣服鞋子尺寸的
为您推荐：
扫描下载二维码>> pixeldup.m
pixeldup.m ( 文件浏览 )
function B = pixeldup(A, m, n)
%PIXELDUP Duplicates pixels of an image in both directions.
B = PIXELDUP(A, M, N) duplicates each pixel of A M times in the
vertical direction and N times in the horizontal direction.
Parameters M and N must be integers.
If N is not included, it
defaults to M.
R. C. Gonzalez, R. E. Woods, & S. L. Eddins
Digital Image Processing Using MATLAB, Prentice-Hall, 2004
$Revision: 1.4 $
16:29:54 $
% Check inputs.
if nargin & 2
error('At least two inputs are required.');
if nargin == 2
% Generate a vector with elements 1:size(A, 1).
u = 1:size(A, 1);
% Duplicate each element of the vector m times.
m = round(m); % Protect against nonintergers.
u = u(ones(1, m), :);
% Now repeat for the other direction.
v = 1:size(A, 2);
n = round(n);
v = v(ones(1, n), :);
B = A(u, v);
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Fig0704(Vase).tif.tif262.48 kB25-10-14 22:31
Fig0707(a)(Original).tif.tif248.78 kB25-10-14 22:31
Fig0709(original_strawberries).tif433.89 kB25-10-14 22:31
Fig0704(Vase).tif.tif449.00 B25-10-14 22:31
Fig0707(a)(Original).tif.tif449.00 B25-10-14 22:31
Fig0709(original_strawberries).tif450.00 B25-10-14 22:31
Fig0804(a)(Tracy).tif.tif260.17 kB25-10-14 22:31
Fig0807(a)(Random).tif.tif311.60 kB25-10-14 22:31
Fig0807(c)(Aligned).tif.tif310.11 kB25-10-14 22:31
Fig0810(a)(Original).tif.tif242.00 kB25-10-14 22:31
Fig0804(a)(Tracy).tif.tif449.00 B25-10-14 22:31
Fig0807(a)(Random).tif.tif449.00 B25-10-14 22:31
Fig0807(c)(Aligned).tif.tif449.00 B25-10-14 22:31
Fig0810(a)(Original).tif.tif449.00 B25-10-14 22:31
Fig0903(a)(utk).tif8.66 kB25-10-14 22:31
Fig0903(b)(gt).tif8.66 kB25-10-14 22:31
Fig0906(a)(broken-text).tif28.15 kB25-10-14 22:31
Fig0908(a)(wirebond-mask).tif29.36 kB25-10-14 22:31
Fig0910(a)(shapes).tif19.54 kB25-10-14 22:31
Fig0911(a)(noisy-fingerprint).tif9.68 kB25-10-14 22:31
Fig0913(a)(small-squares).tif8.66 kB25-10-14 22:31
Fig0914(a)(bone-skel).tif18.91 kB25-10-14 22:31
Fig0916(a)(bone).tif18.95 kB25-10-14 22:31
Fig0917(a)(ten-objects).tif8.26 kB25-10-14 22:31
Fig0921(a)(recon-mask).tif445.68 kB25-10-14 22:31
Fig0921(b)(recon-marker).tif445.68 kB25-10-14 22:31
Fig0922(a)(book-text).tif227.38 kB25-10-14 22:31
Fig0923(a)(aerial).tif224.62 kB25-10-14 22:31
Fig0925(a)(dowels).tif350.69 kB25-10-14 22:31
Fig0926(a)(rice).tif64.95 kB25-10-14 22:31
Fig0930(a)(calculator).tif1.47 MB25-10-14 22:31
Fig0903(a)(utk).tif389.00 B25-10-14 22:31
Fig0903(b)(gt).tif389.00 B25-10-14 22:31
Fig0906(a)(broken-text).tif390.00 B25-10-14 22:31
Fig0908(a)(wirebond-mask).tif390.00 B25-10-14 22:31
Fig0910(a)(shapes).tif390.00 B25-10-14 22:31
Fig0911(a)(noisy-fingerprint).tif389.00 B25-10-14 22:31
Fig0913(a)(small-squares).tif389.00 B25-10-14 22:31
Fig0914(a)(bone-skel).tif390.00 B25-10-14 22:31
Fig0916(a)(bone).tif390.00 B25-10-14 22:31
Fig0917(a)(ten-objects).tif389.00 B25-10-14 22:31
Fig0921(a)(recon-mask).tif391.00 B25-10-14 22:31
Fig0921(b)(recon-marker).tif391.00 B25-10-14 22:31
Fig0922(a)(book-text).tif391.00 B25-10-14 22:31
Fig0923(a)(aerial).tif391.00 B25-10-14 22:31
Fig0925(a)(dowels).tif391.00 B25-10-14 22:31
Fig0926(a)(rice).tif390.00 B25-10-14 22:31
Fig0930(a)(calculator).tif392.00 B25-10-14 22:31
Fig1002(a)(test_pattern_with_single_pixel).tif445.68 kB25-10-14 22:31
Fig1004(a)(wirebond_mask).tif231.23 kB25-10-14 22:31
Fig1006(a)(building).tif353.40 kB25-10-14 22:31
Fig1010(a)(five-dots).tif597.00 B25-10-14 22:31
Fig1013(a)(scanned-text-grayscale).tif1.77 MB25-10-14 22:31
Fig1014(a)(defective_weld).tif194.73 kB25-10-14 22:31
Fig1017(a)(cygnusloop_Xray_original).tif64.26 kB25-10-14 22:31
Fig1020(a)(binary-dowel-image).tif8.31 kB25-10-14 22:31
Fig1021(a)(small-blobs).tif17.83 kB25-10-14 22:31
Fig1022(a)(gel-image).tif64.97 kB25-10-14 22:31
Fig1002(a)(test_pattern_with_single_pixel).tif391.00 B25-10-14 22:31
Fig1004(a)(wirebond_mask).tif391.00 B25-10-14 22:31
Fig1006(a)(building).tif391.00 B25-10-14 22:31
Fig1010(a)(five-dots).tif388.00 B25-10-14 22:31
Fig1013(a)(scanned-text-grayscale).tif392.00 B25-10-14 22:31
Fig1014(a)(defective_weld).tif391.00 B25-10-14 22:31
Fig1017(a)(cygnusloop_Xray_original).tif390.00 B25-10-14 22:31
Fig1020(a)(binary-dowel-image).tif389.00 B25-10-14 22:31
Fig1021(a)(small-blobs).tif390.00 B25-10-14 22:31
Fig1022(a)(gel-image).tif390.00 B25-10-14 22:31
Fig1102(a)(noisy_circular_stroke).tif317.92 kB25-10-14 22:31
Fig1107(a)(mapleleaf).tif21.21 kB25-10-14 22:31
Fig1111(a)(boundary_sq.tif56.19 kB25-10-14 22:31
Fig1111(b)(boundary_triangle).tif56.20 kB25-10-14 22:31
Fig1113(a)(chromo_original).tif11.82 kB25-10-14 22:31
Fig1116(a)(chromo_binary).tif11.82 kB25-10-14 22:31
Fig1119(a)(superconductor-with-window).tif946.83 kB25-10-14 22:31
Fig1119(b)(cholesterol-with-window).tif955.50 kB25-10-14 22:31
Fig1119(c)(microporcessor-with-window).tif1.04 MB25-10-14 22:31
Fig1121(a)(random_matches).tif304.51 kB25-10-14 22:31
Fig1121(b)(ordered_matches).tif304.51 kB25-10-14 22:31
Fig1123(a)(Original_Padded_to_568_by_568).tif315.51 kB25-10-14 22:31
Fig1125(a)(WashingtonDC_Band1_512).tif256.40 kB25-10-14 22:31
Fig1125(b)(WashingtonDC_Band2_512).tif256.40 kB25-10-14 22:31
Fig1125(c)(WashingtonDC_Band3_512).tif256.40 kB25-10-14 22:31
Fig1125(d)(WashingtonDC_Band4_512).tif256.40 kB25-10-14 22:31
Fig1125(e)(WashingtonDC_Band5_512).tif256.40 kB25-10-14 22:31
Fig1125(f)(WashingtonDC_Band6_512).tif256.40 kB25-10-14 22:31
Fig1102(a)(noisy_circular_stroke).tif391.00 B25-10-14 22:31
Fig1107(a)(mapleleaf).tif390.00 B25-10-14 22:31
Fig1111(a)(boundary_sq.tif390.00 B25-10-14 22:31
Fig1111(b)(boundary_triangle).tif390.00 B25-10-14 22:31
Fig1113(a)(chromo_original).tif390.00 B25-10-14 22:31
Fig1116(a)(chromo_binary).tif390.00 B25-10-14 22:31
Fig1119(a)(superconductor-with-window).tif391.00 B25-10-14 22:31
Fig1119(b)(cholesterol-with-window).tif391.00 B25-10-14 22:31
Fig1119(c)(microporcessor-with-window).tif392.00 B25-10-14 22:31
Fig1121(a)(random_matches).tif391.00 B25-10-14 22:31
Fig1121(b)(ordered_matches).tif391.00 B25-10-14 22:31
Fig1123(a)(Original_Padded_to_568_by_568).tif391.00 B25-10-14 22:31
Fig1125(a)(WashingtonDC_Band1_512).tif391.00 B25-10-14 22:31
Fig1125(b)(WashingtonDC_Band2_512).tif391.00 B25-10-14 22:31
Fig1125(c)(WashingtonDC_Band3_512).tif391.00 B25-10-14 22:31
Fig1125(d)(WashingtonDC_Band4_512).tif391.00 B25-10-14 22:31
Fig1125(e)(WashingtonDC_Band5_512).tif391.00 B25-10-14 22:31
Fig1125(f)(WashingtonDC_Band6_512).tif391.00 B25-10-14 22:31
&Fig1201(a)(Hurricane&0.00 B66% 25-10-14
Fig1201(b)(hurricane_mask).tif1.21 kB25-10-14 22:31
Fig1202(a)(WashingtonDC_Band1_512).tif256.40 kB25-10-14 22:31
Fig1202(b)(WashingtonDC_Band2_512).tif256.40 kB25-10-14 22:31
Fig1202(c)(WashingtonDC_Band3_512).tif256.40 kB25-10-14 22:31
Fig1202(d)(WashingtonDC_Band4_512).tif256.40 kB25-10-14 22:31
Fig1202(e)(Mask_Composite).tif32.24 kB25-10-14 22:31
Fig1202(f)(Misclassified).tif32.22 kB25-10-14 22:31
Fig1203(a)(bottle_1).tif13.47 kB25-10-14 22:31
Fig1203(d)(bottle_2).tif13.47 kB25-10-14 22:31
&Fig1201(a)(Hurricane&0.00 B66% 25-10-14
Fig1201(b)(hurricane_mask).tif389.00 B25-10-14 22:31
Fig1202(a)(WashingtonDC_Band1_512).tif391.00 B25-10-14 22:31
Fig1202(b)(WashingtonDC_Band2_512).tif391.00 B25-10-14 22:31
Fig1202(c)(WashingtonDC_Band3_512).tif391.00 B25-10-14 22:31
Fig1202(d)(WashingtonDC_Band4_512).tif391.00 B25-10-14 22:31
Fig1202(e)(Mask_Composite).tif390.00 B25-10-14 22:31
Fig1202(f)(Misclassified).tif390.00 B25-10-14 22:31
Fig1203(a)(bottle_1).tif390.00 B25-10-14 22:31
Fig1203(d)(bottle_2).tif390.00 B25-10-14 22:31
Fig0101(MATLAB_desktop_with_text).tif1.23 MB25-10-14 22:31
Fig0203(a)(chest-xray).tif290.07 kB25-10-14 22:31
Fig0204(a)(bubbles-q-100jpg).tif484.35 kB25-10-14 22:31
Fig0205(a)(cktboard_200dpi).tif210.16 kB25-10-14 22:31
Fig0206(a)(rose-original).tif1.00 MB25-10-14 22:31
Fig0207(2Dsinewave).tif256.42 kB25-10-14 22:31
Fig0303(a)(breast).tif276.88 kB25-10-14 22:31
Fig0305(a)(spectrum).tif64.76 kB25-10-14 22:31
Fig0306(a)(bone-scan-GE).tif394.18 kB25-10-14 22:31
Fig0308(a)(pollen).tif244.53 kB25-10-14 22:31
&Fig0310(a)(Moon&0.00 B72% 25-10-14
Fig0315(a)(original_test_pattern).tif256.59 kB25-10-14 22:31
Fig0316(a)(moon).tif246.33 kB25-10-14 22:31
Fig0318(a)(ckt-board-orig).tif203.36 kB25-10-14 22:31
Fig0318(b)(ckt-board-slt-pep-both-0pt2).tif203.36 kB25-10-14 22:31
Fig0303(a)(breast).tif391.00 B25-10-14 22:31
Fig0305(a)(spectrum).tif390.00 B25-10-14 22:31
Fig0306(a)(bone-scan-GE).tif391.00 B25-10-14 22:31
Fig0308(a)(pollen).tif391.00 B25-10-14 22:31
&Fig0310(a)(Moon&0.00 B65% 25-10-14
Fig0315(a)(original_test_pattern).tif391.00 B25-10-14 22:31
Fig0316(a)(moon).tif391.00 B25-10-14 22:31
Fig0318(a)(ckt-board-orig).tif391.00 B25-10-14 22:31
Fig0318(b)(ckt-board-slt-pep-both-0pt2).tif391.00 B25-10-14 22:31
Fig0403(a)(image).tif256.40 kB25-10-14 22:31
Fig0405(a)(square_original).tif64.44 kB25-10-14 22:31
Fig0409(a)(bld).tif352.22 kB25-10-14 22:31
Fig0413(a)(original_test_pattern).tif244.53 kB25-10-14 22:31
Fig0419(a)(chestXray_original).tif246.13 kB25-10-14 22:31
Fig0403(a)(image).tif391.00 B25-10-14 22:31
Fig0405(a)(square_original).tif390.00 B25-10-14 22:31
Fig0409(a)(bld).tif391.00 B25-10-14 22:31
Fig0413(a)(original_test_pattern).tif391.00 B25-10-14 22:31
Fig0419(a)(chestXray_original).tif391.00 B25-10-14 22:31
Fig0503(a)(spectrum1).tif256.59 kB25-10-14 22:31
Fig0503(c)(spectrum2).tif256.59 kB25-10-14 22:31
Fig0503(e)(sine_pattern3).tif256.40 kB25-10-14 22:31
Fig0503(f)(sine_pattern4).tif256.40 kB25-10-14 22:31
Fig0504(a)(noisy_image).tif203.36 kB25-10-14 22:31
Fig0504(b)(binary_mask).tif203.36 kB25-10-14 22:31
Fig0505(a)(ckt_pepper_only).tif203.36 kB25-10-14 22:31
Fig0505(b)(ckt_salt_only).tif203.36 kB25-10-14 22:31
Fig0506(a)(ckt_salt_pep_pt25).tif203.36 kB25-10-14 22:31
Fig0507(a)(checkeboard8_pixeldup_8).tif265.18 kB25-10-14 22:31
Fig0511(a)(PSF_original).tif263.31 kB25-10-14 22:31
Fig0515(a)(base-with-control-points).tif25.74 kB25-10-14 22:31
Fig0503(a)(spectrum1).tif391.00 B25-10-14 22:31
Fig0503(c)(spectrum2).tif391.00 B25-10-14 22:31
Fig0503(e)(sine_pattern3).tif391.00 B25-10-14 22:31
Fig0503(f)(sine_pattern4).tif391.00 B25-10-14 22:31
Fig0504(a)(noisy_image).tif391.00 B25-10-14 22:31
Fig0504(b)(binary_mask).tif391.00 B25-10-14 22:31
Fig0505(a)(ckt_pepper_only).tif391.00 B25-10-14 22:31
Fig0505(b)(ckt_salt_only).tif391.00 B25-10-14 22:31
Fig0506(a)(ckt_salt_pep_pt25).tif391.00 B25-10-14 22:31
Fig0507(a)(checkeboard8_pixeldup_8).tif391.00 B25-10-14 22:31
Fig0511(a)(PSF_original).tif391.00 B25-10-14 22:31
Fig0515(a)(base-with-control-points).tif390.00 B25-10-14 22:31
Fig0602(b)(RGB_color_cube).tif7.11 MB25-10-14 22:31
Fig0604(a)(iris).tif1.04 MB25-10-14 22:31
Fig0605(a)(HSV_color_hexagon).tif3.01 MB25-10-14 22:31
&Fig0608(a)&0.00 B751
&Fig0608(b)&0.00 B61
&Fig0614(a)(Chalk&0.00 B36% 25-10-14
&Fig0615(a)(Aerial&0.00 B78% 25-10-14
&Fig0615(d)(Iris&0.00 B54% 25-10-14
&Fig0616(a)(Weld&0.00 B57% 25-10-14
&Fig0617(a)(JLK&0.00 B24% 25-10-14
&Fig0618(a)(Caster&0.00 B46% 25-10-14
Fig0619(a)(RGB_iris).tif4.10 MB25-10-14 22:31
Fig0624(a)RGB2-red.tif198.30 kB25-10-14 22:31
Fig0624(b)RGB2-green.tif198.30 kB25-10-14 22:31
Fig0624(c)(RGB2-blue).tif198.30 kB25-10-14 22:31
Fig0624(d)(RGB2-fullcolor).tif401.61 kB25-10-14 22:31
Fig0627(a)(jupitermoon_original).tif678.56 kB25-10-14 22:31
Fig0627(b)(jupitermoon_ROI).tif678.56 kB25-10-14 22:31
Fig0602(b)(RGB_color_cube).tif392.00 B25-10-14 22:31
Fig0604(a)(iris).tif392.00 B25-10-14 22:31
Fig0605(a)(HSV_color_hexagon).tif392.00 B25-10-14 22:31
&Fig0608(a)&0.00 B391 261
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&Fig0614(a)(Chalk&0.00 B66% 25-10-14
&Fig0615(a)(Aerial&0.00 B65% 25-10-14
&Fig0615(d)(Iris&0.00 B65% 25-10-14
&Fig0616(a)(Weld&0.00 B66% 25-10-14
&Fig0617(a)(JLK&0.00 B66% 25-10-14
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Fig0619(a)(RGB_iris).tif392.00 B25-10-14 22:31
Fig0624(a)RGB2-red.tif391.00 B25-10-14 22:31
Fig0624(b)RGB2-green.tif391.00 B25-10-14 22:31
Fig0624(c)(RGB2-blue).tif391.00 B25-10-14 22:31
Fig0624(d)(RGB2-fullcolor).tif391.00 B25-10-14 22:31
Fig0627(a)(jupitermoon_original).tif391.00 B25-10-14 22:31
Fig0627(b)(jupitermoon_ROI).tif391.00 B25-10-14 22:31
冈萨雷斯数字图像处理MATLAB版.中文版.pdf21.46 MB25-10-14 22:22
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I'm trying to write a function that does what conv2(h1,h2,A) & conv2(...'shape') does without using the built-in function. (speed is currently not an issue). as defined here:
These are my commands:
imgC = imread('camerman.tif');
imgC = double(imgC);
sigma = 1;
inp = (-1 .*2.5 .*sigma):1:(2.5 .* sigma);
gauss1d = (1/(sigma .* sqrt(2*pi))).*exp(-(inp.^2/(2.*sigma.*sigma)));
gaussprime = diff(gauss1d);
x = conv2fft(gaussprime,1,imgC , 'same');
y = conv2fft(1,gaussprime.',imgC , 'same');
blur = conv2fft (gauss1d, gauss1d, imgC );
This is my error:
Undefined function 'convfft' for input arguments of type 'double'.
Error in conv2fft (line 81) `if size(convfft(a(1,:),r),1)==1`
If I run the same commands but use the conv2 function:
imgC = imread('camerman.tif');
imgC = double(imgC);
sigma = 1;
inp = (-1 .*2.5 .*sigma):1:(2.5 .* sigma);
gauss1d = (1/(sigma .* sqrt(2*pi))).*exp(-(inp.^2/(2.*sigma.*sigma)));
gaussprime = diff(gauss1d);
x = conv2(gaussprime,1,imgC , 'same');
y = conv2(1,gaussprime.',imgC , 'same');
blur = conv2(gauss1d, gauss1d, imgC );
It works fine?... I've been searching around and staring at this code for hours. I just can't see it. Anyone notice what is wrong with my function?
Undefined function 'xxx' for input arguments of type 'double' typically indicates that the function xxx is not on the path.
To confirm that this is indeed the issue, type which convfft at the command line, since which should indicate where Matlab knows the file is located.
If the file is not found, make sure that it exists on your computer, and add the file's parent folder to the Matlab path.
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