xử lý hình ảnh trong c

Ngày tải lên: 01/05/2014, 12:00

... tạo ảnh c a thiết bị MRI thông qua c c chế độ ứng với c c chuỗi xung kh c nhau (Spin echo, Gradient nghị ch đảo…) và trên sự điều chỉnh c c thông số c a c c loại chuỗi xung này để cho ra c c hình ... projection; c ng như nguyên lý c c bộ l c dùng để xử lý ảnh. • Th c hành c bản c ch vận hành c c lý thuyết trên trong bài toán mô phỏng sự tạo ảnh c t lớp truyền qua bằng c ch lập trình trong ... h c Bách khoa TP.HCM. C c bài thí nghiệm trên đư c thiết kế nhằm giúp sinh viên nắm vững một c ch c hệ thống c c cơ sở vật lý nguyên lý hoạt động c c thiết bị, th c hành và phân tích c c yếu...

Ngày tải lên: 10/04/2013, 15:44

Ngày tải lên: 13/08/2013, 14:57

... nơi chứa c c file ảnh Hộp thoại Insert Picture Click chọn Click 08/30/13 NguyenChiLuyen-N hom ALG 9 THAY ĐỔI VỊ TRÍ ẢNH THAY ĐỔI VỊ TRÍ ẢNH C ch 1: Click chuột lên hình ảnh c n di chuyển để chọn ... NguyenChiLuyen-N hom ALG 28 VẼ C C HÌNH Đ C BIỆT VẼ C C HÌNH Đ C BIỆT Click C ch 1: Click chuột vào c ng c AutoShape Nhóm lệnh vẽ đường Nhóm lệnh vẽ đoạn nối Nhóm lệnh vẽ c c hình mẫu c bản Nhóm ... AutoShape 08/30/13 NguyenChiLuyen-N hom ALG 2 CHÈN HÌNH ẢNH TỪ CLIP ART CHÈN HÌNH ẢNH TỪ CLIP ART C ch 1: Trường hợp chọn mẫu bố c c có sẵn trong Slide Layout Click đúp để chèn hình ảnh từ Clip Art Xuất...

Ngày tải lên: 30/08/2013, 08:10

... on a bicycle helmet, with an aremac and a fixed focus camera that had sufficient depth of field (the author chose the connectix QuickCam because of low cost). Purchasing 20 quickcams, receiving donations ... the absence of the camcorder. However, nearby subject matter 23 N will be distance d e ,whichis closer to the effective center of projection of the camcorder than distance d e to the effective center ... focal distance of the eye. Both the camera and aremac then focus to approximately this same distance. (c) Focus of right camera and both aremacs (including vergence) controlled by autofocus camera...

Ngày tải lên: 17/10/2013, 22:15

... half-quadratic (biratic) function (4.34), which is the comparametric equation corresponding to the quadratic equation, is simple, but the comparametric equation corresponding to the cubic or quartic function, ... constant correction. The scaling factor allows for an equicomparametric function with equicomparametricity not necessarily equal to unity. A typical linear scaling saturation constant of equicomparametricity ... is called a comparametric equation [64]. Comparametric equations are a special case of the more general class of equations called functional equations [80] and comparametric plots are a special...

Ngày tải lên: 20/10/2013, 17:15

... (depicted by flash sync contacts X) is sent back by the camera’s outbound transmit channel depicted OUTBOUND Tx, to the artist (a) and received by the artist’s light source synchronization receiver, depicted OUTBOUND Rx. ... the various comparametric functions introduced in Chapter 4, the power of root over root plus constant correction model, or the saturated power of root over root plus constant correction model, ... lightspace analysis function allows us to reconstruct natural-light pictures of a scene, but not pictures taken by our choice of lighting. For example, with the lightspace analysis function of...

Ngày tải lên: 24/10/2013, 15:15

... cameras have a built in automatic gain control (AGC), automatic shutter, or auto-iris that cannot be turned off. Many modern digitizers to which cameras are connected have their own AGC, which ... AGC, which also cannot be disabled. With AGC, the characteristic response function of the camera varies, making it impossible to accurately describe one image as a projective coordinate transformed ... is ‘‘dechirped’’ to g. The arrows indicate how a chosen cycle of chirp g is mapped to the corresponding cycle of the sinusoid h. Fixing g and allowing a = 0, b,and c to vary produces a class...

Ngày tải lên: 24/10/2013, 15:15

... linear, space-invariant system. The analytic or operational choice between the two approaches, convolution or Fourier processing, is usually problem dependent. 1.4. IMAGE STOCHASTIC CHARACTERIZATION The ... to be a member of a con- tinuous three-dimensional stochastic process with space variables (x, y) and time variable (t). The stochastic process F(x, y, t) can be described completely by knowledge ... spatial autocorrelation function is often considered as the product of x and y axis autocorrelation functions, (1.4-15) for computational simplicity. For scenes of manufactured objects, there...

Ngày tải lên: 24/12/2013, 09:17

... metric significance. That is, a unit distance within the color solid should represent a constant perceptual color difference regardless of the particular pair of colors considered. The subject ... physio- logical basis for the trichromatic theory of color vision. When a light stimulus activates a rod or cone, a photochemical transition occurs, producing a nerve impulse. The manner in which nerve ... Systems, Man and Cybernetics, SMC-7, 3, March 1977, 161–170. 29. J. J. McCann, “Human Color Perception,” in Color: Theory and Imaging Systems, R. A. Enyard, Ed., Society of Photographic Scientists and...

Ngày tải lên: 24/12/2013, 09:17

... λ()λd ∫ = YC() T 1 C( )YP 1 ()T 2 C( )YP 2 ()T 3 C( )YP 3 ()++= t 1 C( ) T 1 C( ) T 1 C( ) T 2 C( ) T 3 C( )++ = T 1 C( ) t 1 C( )YC() t 1 C( )YP 1 ()t 2 C( )YP 2 ()t 3 C( )YP 3 ()++ = T 2 C( ) t 2 C( )YC() t 1 C( )YP 1 ()t 2 C( )YP 2 ()t 3 C( )YP 3 ()++ ... 0.008856 FIGURE 3.5-12. Gamma correction curve for the CCIR Rec. 709 primaries. K ˜ k K ˜ c 3 – c 1    1 c 2 ⁄ K ˜ c 4        = K ˜ c 4 b≥ 0.0 K ˜ c 4 b<≤ COLORIMETRY CONCEPTS 57 provided ... 3.2-3. Subtractive color matching. T 1 C( ) A 1 C( ) A 1 W() = T 2 C( ) A– 2 C( ) A 2 W() = T 3 C( ) A– 3 C( ) A 3 W() = E λ() A 1 W()A 2 W()A 3 W() A 1 C( )A 2 C( )A 3 C( ),, T 1 C( )T 2 C( )T 3 C( ) 76 PHOTOMETRY...

Ngày tải lên: 24/12/2013, 09:17

... reconstruction process is considered for both theoretically exact and practical systems. 4.1. IMAGE SAMPLING AND RECONSTRUCTION CONCEPTS In the design and analysis of image sampling and reconstruction ... a reconstructed function. This problem can be eliminated by generat- ing a cubic convolution function (15,16), which forces the slope of the ends of the interpolation to be zero. The cubic convolution ... all spectra for which . With physical image reconstruction systems, these conditions are impossible to achieve exactly. Consideration is now given to the effects of using imperfect reconstruction...

Ngày tải lên: 24/12/2013, 09:17

... product of row and column covariance func- tions, then the covariance matrix of the image vector can be expressed as the direct product of row and column covariance matrices. Under this condition (5.3-14) where ... r j Q ={}= 121 5 DISCRETE IMAGE MATHEMATICAL CHARACTERIZATION Chapter 1 presented a mathematical characterization of continuous image fields. This chapter develops a vector-space algebra formalism ... function with . Similarly, the covariance between lines can be modeled well with a Markov covariance function with . If the horizontal and vertical covari- ances were exactly separable, the covariance...

Ngày tải lên: 24/12/2013, 09:17

... IEEE Publication 72 CH0 601- 5-NTC, National Telecommunications Conference 1972 Record, Houston, TX, Decem- ber 1972. REFERENCES 157 (6.3-7) Thus, the coordinates of the quantized color become (6.3-8) subject ... image processing systems. Section 6.2 considers the processing of quantized variables. The last section discusses the subjective effects of quantizing monochrome and color images. 6.1. SCALAR QUANTIZATION Figure ... a sequence of uniform-length binary code words. In the literature, the binary code is often called a pulse code modulation (PCM) code. Because uniform-length code words are used for each image...

Ngày tải lên: 24/12/2013, 09:17

... n i N≤≤ J 2 1× k E Cf E = J 2 J 2 × JJ× C C 11, 00 … 0C 1 JL – 2 + , … C 1 J, C 21, C 22, 0 … 00 · 0C L 1 – J, C 21, C L 2, 0 … 0 0C L 1 + 2, 0 0 … 0C JJ L – 1 + , C JJ L – 2 + , … C JJ, = … … … … … … … C m 2 n 2 , m 1 n 1 ,()H E k 1 k 2 m 1 m 2 ,;,()= 172 SUPERPOSITION ... can be extracted from circulant superposi- tion operator C by use of selection matrices defined as (2) 1 n i J≤≤ 1 m i J≤≤ k i m i n i 1+–()= C m 2 n 2 , C m 2 1 n 2 1 + , + = 16 16× 33× CC C C R ⊗= C R C C JJ× C R h R 1() ... Image Processing, 4, 1, March 1975, 1–24. 3. A. V. Oppenheim and R. W. Schaefer (Contributor), Digital Signal Processing, Prentice Hall, Englewood Cliffs, NJ, 1975. 4. T. R. McCalla, Introduction...

Ngày tải lên: 24/12/2013, 09:17

... transform coefficients that are small may be excluded from processing opera- tions, such as filtering, without much loss in processing accuracy. Another applica- tion in the field of image coding ... Hybrid Discrete Cosine Transform and a Differential Pulse Code Modulator in Real Time,” Proc. National Telecommunications Conference, San Diego, CA, December 1974, 61– 66. 16. W. H. Chen, C. Smith, ... TRANSFORMS REFERENCES 1. H. C. Andrews, Computer Techniques in Image Processing, Academic Press, New York, 1970. 2. H. C. Andrews, “Two Dimensional Transforms,” in Topics in Applied Physics: Picture Pro- cessing...

Ngày tải lên: 24/12/2013, 09:17

... the convolution operator C is a circulant matrix, and the corresponding filter matrix C CC C is of diagonal form. Actually, as can be seen from Eq. 9.1-6, the Fourier transform basis vectors are ... One-dimensional window functions. NN× H uv,()1= 0 uC1–≤≤ 0 vC1–≤≤ 0 uC1–≤≤ N 1 C + vN1–≤≤ N 1 C + uN1–≤≤ 0 vC1–≤≤ N 1 C + uN1–≤≤ N 1 C + vN1–≤≤ H uv,()0= 0 C 1 N 2⁄+≤< 232 LINEAR PROCESSING TECHNIQUES impulse ... Nonrecursive Digital Filters,” Proc. 4th Asilomar Conference on Circuits and Systems, Pacific Grove, CA, November 1970. 9. B. R. Hunt, “Computational Considerations in Digital Image Enhancement,”...

Ngày tải lên: 24/12/2013, 09:17

Ngày tải lên: 24/12/2013, 09:17

Ngày tải lên: 21/01/2014, 15:20

Ngày tải lên: 21/01/2014, 15:20