The Essential Guide to Image Processing- P13 docx

... values of ␣ the restored image is “smooth” while the error image contains the high-frequency information of the original image (large bias of the estimate), while as ␣ decreases the restored image becomes ... the observed surface coil images, D the bias fields, and v the noise in the observed images. This is the same degradation system as in (15.1), and therefore...

Ngày tải lên: 01/07/2014, 10:43

... image restoration algorithms. Let g be the observed noisy and blurred image, D the operator describing the degradation system, f the input to the system, and v the noise added to the output image. ...  2 is to constrain the high-frequency energy of the restored image, therefore requiring that the restored image is smooth. On the other hand, by enforcing ine...

Ngày tải lên: 01/07/2014, 10:43

... detector are used to produce a 2D projection image of the patient. The image has intensity proportional to the amount by which the X-rays are attenuated as they pass through the body, i.e., the 3D ... attached to the front of the camera as illustrated in Fig. 26.2(a). The collimated camera is only sensitive to gamma rays traveling in a direction parallel to th...

Ngày tải lên: 01/07/2014, 10:44

... has to view the latest space telescope images or read about the newest medical image modality to be aware of this. With this introduction,welcome to The Essential Guide to Image Processing! The ... use these VIs to: – transform images using predefined or custom lookup tables, change the contrast information in an image, invert the values in an image, and segment...

Ngày tải lên: 05/06/2014, 11:41

... has to view the latest space telescope images or read about the newest medical image modality to be aware of this. With this introduction,welcome to The Essential Guide to Image Processing! The ... countries around the world. Chapter 2 isdevotedtoa more detailed description of the image processing programs available on the disk, how to use them, and how to...

Ngày tải lên: 01/07/2014, 10:43

... 3.5 Effect of additive offset on the image histogram. Top: original image histogram; bottom: positive (left) and negative (right) offsets shift the histogram to the right and to the left, respectively. 3000 2000 1000 0 50 ... bitmaps onto an image without destroying the image data. Use these VIs to overlay the results of your inspection application onto the images...

Ngày tải lên: 01/07/2014, 10:43

... properties of the DFT are the same, or similar to those of the DSFT, certain important properties are different. These effects arise from sampling the DSFT to create the DFT. 5.4.4 Image Periodicity ... N 8 (n). If the initial coordinate n 0 of an 8-connected contour is known, then the rest of the contour can be represented without loss of information by the directions...

Ngày tải lên: 01/07/2014, 10:43

... the user can control the mapping between the continuous values of the image and the values sent to the display device. For example, consider the CRT monitor as the output device. The visual tonal ... qualities of the output depend on many factors including the brightness and contrast setting of the monitor, the specific phosphors used in the monitor, the linea...

Ngày tải lên: 01/07/2014, 10:43

... impossible to numerically specify the image values to the publisher of this book. We have to rely on the experience of the company to produce images which faithfully reproduce those given to them. ... they fit the data. In order to keep the dis- cussion focused, I will limit the discussion to discretized grayscale photographic images. Many of the principles are...

Ngày tải lên: 01/07/2014, 10:43

... of the basic supporting ideas of linear systems theory as they apply to digital image filtering, and to out- line some of the applications. Special emphasis is given to the topic of linear image enhancement. We ... Application to Image Enhancement of the passive circuit elements (resistors, inductors, capacitors). In optical systems, the integral utilizes the point sp...

Ngày tải lên: 01/07/2014, 10:43