image registration and fusion techniques

... running Linux Deformable Image Registration The optical flow method of deformable image registration was then applied to calculate the deformation matri- ces between the CT images from the different ... study Errors in image registration can also affect the calculated dose There are three root causes for errors in image registration Artifacts in the 4D CTs, the aperture effect [18], and the inherited ... details in 4D CT images Since accurate optical flow registration depends upon clarity of the details in each image, any degradation in image quality can impact the quality of registration The...

Ngày tải lên: 09/08/2014, 08:23

... preprocessing of images to facilitate image registration is described This includes image enhancement and image segmentation Image enhancement is used to remove noise and blur from images and image segmentation ... applied to both 2-D and 3-D images Therefore, discussions on 2-D image registration and 3-D image registration continue in parallel First the 2-D methods and algorithms are described and then their ... the resampled sensed image and the reference image Image registration makes it possible to compare information in reference and sensed images pixel by pixel and determine image differences that...

Ngày tải lên: 06/03/2014, 12:20

... alpha and theta bands are taken as the standard baselines symbolized with z3 and z4 , respectively In the fatigue situation, obvious changes of the alpha and theta signals around the standard ... includes delta band (0.5–4 Hz) corresponding to sleep activity, theta band (4–7 Hz) related with drowsiness, alpha band (8–13 Hz) corresponding to relaxation and creativity, and beta band (13–25 Hz) ... October 2000 [56] Y Zhang and Q Ji, “Active and dynamic information fusion for facial expression understanding from image sequences,” IEEE Transactions on Pattern Analysis and Machine Intelligence,...

Ngày tải lên: 22/06/2014, 19:20

... Source image Load image Select transformation Select landmarks Target image Select landmarks Start registration Registration software Registered image (transformed source image) Figure 2: The image ... methods and testing, and software reliability analysis and estimation Vijai Gandikota received the B.E degree in electronics and communications engineering from Andhra University, India, and the ... generates a registered image Under the assumption that the source and the target images represent the same fingerprint, registration is successful if the landmarks in the registered image are “sufficiently”...

Ngày tải lên: 22/06/2014, 23:20

... theoretic and deliverable AppDs for patient shown on panel (a) and panel (b), for patient 2, shown on panel (c) and panel (d) and for patient 3, shown on panel (e) and panel (f) respectively The red and ... (i.e 45 Gy) Figure shows the theoretic and deliverable AppD for patient (figures 5(a) and 5(b)), patient (figures 5(c) and 5(d)) and patient (figures 5(e) and 5(f)) The theoretic AppD hot regions ... simulation 4D dataset using bony structures, and figure shows the anatomic changes between coronal CT images obtained at simulation and week for patient Both figures and demonstrate the irregularity of...

Ngày tải lên: 09/08/2014, 09:20

... source image after registration 76 4.5 (a) Target image (b) Source image (c) Contour of the source image overlaid onto the target image before registration (d) Registration ... modeling, image fusion, shape analysis, and medical image analysis Detailed surveys and overviews on applications of image registration can be found in [1], [2], [2], [3], [4], [5], [6] and [7] ... metrics for more robust and accurate image registration Although numerous image registration techniques have been developed in the past few decades [4, 17, 18], ordinary image registration algorithms...

Ngày tải lên: 09/09/2015, 08:17

... Resultant images after applying bleed-through removal technique on the originally unaligned images and the coarsely aligned images Images (a-b) are for sample image 1; Images (c-d) are for sample image ... registered target image and the estimated transformation map 71 4.10 A degraded document image (cropped from a larger image) and the resultant image after fine registration and bleed-through ... applications, image registration can also be called image alignment, matching, stabilization, fusion or stitching In general, the applications of image registration could be 1.1 Image Registration...

Ngày tải lên: 10/09/2015, 08:32

... 131 6.6 Difference images before and after cardiac image registration (a) reference image; (b) floating image; (c) difference image before registration; difference image after registration using ... Difference images highlighting performance of our registration algorithm Columns 1-3 show target image, source image and difference image before registration Columns 4-6 show difference images after registration ... 5.6 Registration and Segmentation performance for natural images (a) reference image; (b) floating image with mask outline; (c) difference image before registration; (d) difference image after registration...

Ngày tải lên: 11/09/2015, 10:17

... the patient’s image with the digital anatomical atlases, specimen classification 2.1.2 Standard image registration stages Due to the diversity of image registration applications and due to various ... image registration algorithms, it handles lower image overlaps, image changes and poor image quality, all of which reduce the number of common landmarks between images Moreover, by effectively exploiting ... 19: Registration of images with compression distortions .77 Figure 20: Registration of retina images with associated rotation and translation 79 viii Chapter Introduction 1.1 Motivation Image...

Ngày tải lên: 28/09/2015, 13:28

... gọi tam giác Maxell Ta chuyển từ hệ toạ độ màu hệ toạ độ x-y-z 2.2 Lấy mẫu lợng tử hoá (Image Sampling and quantization) Yêu cầu xử lý ảnh máy tính đa ảnh dạng biểu diễn số thích hợp, nghĩa ảnh ... pháp đợc minh hoạ qua hình 2-6 trang bên Lý thuyết mẫu hoá chiều - ảnh với dải giới hạn (Band limited Images) Một hàm f(x,y) gọi dải giới hạn khai triển Fourier F(1, 2) bên miền bao (hình 2.5) ... màu cục - Dữ liệu ảnh Phần mô tả lặp n lần ảnh chứa n đối tợng Header Image (10 byte) Palete of Imge 1(nếu có) Data of Image ' ,' ký tự liên kết ';' GIF terminator Phần đầu cuối ảnh GIF(terminator)...

Ngày tải lên: 27/08/2012, 10:19

... useful only for positive operands The standard library functions div and ldiv take two integers or long integers and return the quotient and remainder in the quot and rem fields of a structure ... advanced C programming techniques, such as opaque pointers and pointers to pointers, and thus serve as nontrivial examples of those techniques, which are useful in systems programming and data structure ... effort, and they almost always become converts to interface-based design C Interfaces and Implementations: Techniques for Creating Reusable Software C Interfaces and Implementations: Techniques...

Ngày tải lên: 04/09/2013, 22:04

... “skull” and click OK Save and close your skull file Return to your gas mask file and define this image as a Brush preset too, by using the same Edit menu command Name this preset “mask” and click ... negative Type Control(PC)/Command(Mac)-a to select all and then type Control(PC)/Command(Mac)-c to copy the selected image Return to your working file and navigate to the Channels palette In the Channels ... Target your new alpha channel and type Control(PC)/Command(Mac)-v to paste the copied art into your new channel Go your own way The black -and- white art here is a very sharp and finely tuned piece of...

Ngày tải lên: 17/10/2013, 20:15

... Layers palette and use the Magic Wand to select her face, neck, and hand regions that are surrounded by black outlines Leave the selection active and then target the underlying layer Expand the selection ... convincing wear and distress Using appropriate imagery within your channels is very important Try to choose images containing random patterns and textures, as realistic wear and tear is never ... an image or invert an active selection Always remember that the keyboard shortcut for inverting an image is Control(PC)/Command(Mac)-I and that for inverting a selection is Control(PC)/Command(Mac)-Shift-I...

Ngày tải lên: 20/10/2013, 11:15

... illustration, using different resource files and a different position on the canvas Use the hand.jpg and hand-thermal.jpg files for your first two channels and subsequent layers Then follow the process ... available tools and failing monetary resources rather than a conscious attempt at style Regardless of intent, a certain style prevails Poor registration, inferior image quality, and cut -and- paste typography ... Creative Techniques and Working Methods Virtual scissors and glue In order to get that authentic cut -and- paste look, you have to take a very simplistic approach to isolating elements and compositing...

Ngày tải lên: 20/10/2013, 11:15

... the layer to multiply and move it down and to the right with the Move tool Duplicate this layer and then move it up and to the left a little And finally, duplicate this layer and use FreeTransform ... copy, and then paste the copied art into the working file as a new layer Select the Magic Wand tool and this time, disable the Contiguous option Leave all other Magic Wand settings as they were and ... the frequency to 20 and the angle to 135° Invert the image, select all, and copy Return to the working file and paste it into a new channel Load the channel as a selection and create a new layer...

Ngày tải lên: 24/10/2013, 10:15

... trace, and scan The next step, after photographing the image components, is to drastically alter the images that we’ll be tracing by hand Open up the skull.jpg file Choose Image AdjustmentsϾBlack and ... Control(PC)/Command(Mac)-A and copy by typing Control(PC)/Command(Mac)-C Return to your working file and, with the selection still active, paste into the active selection by typing Control(PC)/ Command(Mac)-Shift-V ... done previously, use the Magic Wand to select the black areas of the image and then invert the selection Paste the copied tree image into the selection as a new layer and move it to the left within...

Ngày tải lên: 24/10/2013, 10:15

... at the image and examine which techniques will prove useful later on, when you’re creating other images on your own a This cheek detail was made perfect by transforming and spherizing and then ... ways to finesse your imagery as well as work with color and texture, layer stacking and duplication is essentially the nuts and bolts of what we’re doing here Visualization and implementation Apart ... the corners and midpoint handles of the bounding box to increase the eye in size and alter the proportion so that it is larger and wider than the original Press Enter on the keyboard and then repeat...

Ngày tải lên: 28/10/2013, 17:15

... brownish gray color from the image and then fill the active selection with it on your new layer Keep the selection active and open up the texture.jpg file Copy the texture image and then return to your ... selected image and drag it onto the top of the cube You’ll see a thick blue line appear around the plane to indicate that your image will be placed there Choose the Transform tool and resize the image ... your image into an alpha channel and then adjust and edit the results to carefully craft a custom selection that lines up perfectly with your image You’ll be amazed at the amazingly complex and...

Ngày tải lên: 28/10/2013, 17:15