Endoscopic image processing requirements and solutions

We often need to check the region in the field of internal limit.

In the medical field, endoscope for perspective in order to check the organ. Endoscopy may through a small incision check gastrointestinal and respiratory and urinary ducts, and internal organs. Endoscope, through its or kin or tough long tube to capture the image. Used for cutting, scratching and other features of additional instruments are often connected in endoscopy, to be able to improve health and reduce recovery time of minimally invasive surgery. Being used for the application to check the qualified zone articles often called pipeline. Pipes-mirror is used to check the machine internal, building wall and the collapse of the search.

Endoscopy or pipes-mirror has the following four basic requirements:

Light up the main body of the lamp;

Guidance lighting pipeline;

Subject capable of collecting from the optical lens reflector or fibre system;

Capable of collecting, processing and storage or display an image for image acquisition system.

TI extensive product series supports the entire image chain: generate light, capture images, signal conditioning and image processing.

LED drive offers excellent directivity and lower heat and other features of bright light source.

These drives a wide range of uses and allows select LED to apply to the application of the spectrum requirements. Current step resolution affects the precision lighting control; 14-bit LED controllers support on lighting levels and precise control of lighting timer.

Image sensor can detect the emission of light and the light converted into analog signals.

Low-noise line drive needs depending on the location of the image sensor, the signal sent to light an area outside the pipeline length. Line drive key considerations to low power consumption, noise immunity, and data rate. LVDS technology provides 800Mbps speeds, low voltage swing, and high common-mode noise suppression.

Analog front end (AFE) for the final image quality.

AFE adjustment sensor simulation of electrical signals, and image information is converted to a numeric representation. Can I correct signal conditioning for sensors inductive distortion (such as dark current elimination, reduction levels change, defect pixel correction and DC offset changes) is an important factor in choosing AFE. Programmable gain amplifier (PGA) of existence, the PGA of linearity and gain range available is also very important, depending on the signal level. In the digital process, the digits will decide the contrast of the image. Usually, you need to set the initial data for accuracy than the ultimate digital image required digits high 2 to 4 bits of data. Therefore, if you need an 8-bit data of the final image, you first should be a 10-bit digitization to allow image processing rounding errors occur. In the end, when the color copy link becomes critical, you should minimize the differential and integral of nonlinear distortion (DNL, INL).

Endoscopy: a perspective on the body and check the throat or esophagus and other organs of light optical instruments.

Endoscopy can be rigid or flexible.

Professional endoscope according to their specific view object and a name.

Including the following major name example: cystoscopy (bladder), kidney (renal), bronchoscopy (bronchi), laryngoscope (throat and larynx), endoscopy (ear), Arthroscopy (joint), laparoscopic (abdominal), gastroscopy.

Endoscope System block diagram