Window width and window level adjusting method for pixel set with large data volume

An adjustment method and a technology with a large amount of data, applied in the direction of color signal processing circuits, etc., can solve the problems of image pixel sets that are difficult to process and respond, and the amount of calculation is huge, and achieve the effect of reducing the computational burden

An adjustment method and a technology with a large amount of data, applied in the direction of color signal processing circuits, etc., can solve the problems of image pixel sets that are difficult to process and respond, and the amount of calculation is huge, and achieve the effect of reducing the computational burden

CN102104784AInactive Publication Date: 2011-06-22梁威
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  • Window width and window level adjusting method for pixel set with large data volume
  • Window width and window level adjusting method for pixel set with large data volume
  • Window width and window level adjusting method for pixel set with large data volume

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0029] The present invention is a fast, smooth, and optimized method for adjusting the window width and level of a pixel set with a large amount of data; for DICOM format grayscale image files, the operation of adjusting the window width and level is optimized for speed, and the following processing steps are performed;

[0030] Step 1: Open the grayscale image file in DICOM format: read its metadata field and image data field, build a Hashtable data structure object, save each data element tag (TAG) and value type (Value Representation), the length of the value ( Value Field) and value (Value); and read the pixel storage area to the memory pixel set array object;

[0031] Step 2: Construct the DIB color correspondence table: ordinary RGB monitors represent colors through the combination of RGB three colors of 256 levels, but for the gray-scale image of tissu...

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Abstract

The invention relates to a window width and window level adjusting method for a pixel set with large data volume, which comprises the following steps of: displaying a gray level image on an ordinary RGB (Red, Green and Blue) display in a window-adding manner through setting a DIB (Device Independent Bitmap) color contrast table aiming at a digital medical image of DICOM (Digital Imaging and Communications in Medicine) format; during the process of adjusting the window width and the widow level of the image in real time, filtering a response frequency through modular arithmetic; intercepting and zooming an interest region of the image; establishing a window adjusting transformation rapid access table, and searching a pixel set in the traversal interest region of the window adjusting transformation rapid access table to obtain a method of displaying a gray level value and the like so as to reduce the amount of calculation during the window adjusting process of the pixel set, so that the window width and the window level can be adjusted continuously and smoothly in real time even for an image file with very large data volume.

Description

technical field [0001] The invention relates to a computer processing method for adjusting the window width and level of a digital image, in particular to a speed optimization method in the process of adjusting the window width and level of a pixel set with a large amount of data. Background technique [0002] The technology of computer image processing helps people to adjust the image conveniently to achieve the desired effect. For the image in DICOM format of medical radiology examination, because it reflects the density imaging of human tissue under the irradiation of radiation rays, its pixels only contain grayscale Information, image data that does not contain RGB color information. [0003] The image data in DICOM format is different from the image bit storage method of ordinary RGB images. It usually uses 8-bit, 16-bit, and 24-bit bit depth to represent the grayscale level of the image. The grayscale level usually reaches 4096 grayscale levels or even higher. The ord...

Claims

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Application Information

Patent Timeline
22 Jun 2011
Publication
CN102104784A
IPC
H04N9/64
Inventors
梁威