JPH02181652A - Image display device of automatic blood image classifying device - Google Patents

Abstract

PURPOSE:To inexpensively improve color reproducibility of images without having the need for separately setting the camera to be exclusively used for CRT display by subjecting the image signals obtd. by a TV camera for image processing to arithme tic processing in such a manner that the colors equal to real image colors are repro duced on the CRT. CONSTITUTION:The image information of a sample 1 magnified by a microscope 2 is passed through narrow-band filters FR, FG, FB 6 and is converted to electric signals R, G, B by a TV camera image pickup tube, by which the classification of blood cells is executed. These signals are passed through a mixing circuit 8 and a gammacorrecting circuit 8 and are thereby subjected to the correction of the color reproduc tion at the time of inputting the signals to the CRT. The mixing coefft. of the circuit 8 is so determined that the respective blood cell colors approximate uniformly to the real image colors. The magnitude of the gamma correction of the circuit 9 is so regulated with the circuit 8 that the contrast of the blood cell images is improved and the deterio ration of the color reproduction is obviated. The blood cell colors reproduced on the CRT are equaled to the color tones of the visual images by the microscope and the sense of incompatibility is eliminated by adding the circuits 8 and 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic blood image classification device using image processing, and particularly to an image display device suitable for displaying blood cell images on a CRT display. .

[Conventional technology]

In the conventional apparatus, a signal for image processing is directly input to a CRT for image display, and correction for the use of a narrow band filter, correction for γ characteristics, etc. are not performed. As a result, the nucleus appeared bluer than the real image color, and the red blood cell appeared redder than the real image color, creating a sense of incongruity between the two images and the visual image obtained using a microscope.

[Problem to be solved by the invention]

The above conventional technology uses an image signal for classifying blood images;
The signals displayed on the CRT are the same, and in order to improve the accuracy of classification, narrow band filters are placed so that the characteristics of the blood cells are most noticeable, which deteriorates the color reproduction of the blood cell image on the CRT. No consideration is given to these factors, and the color tone of the visual image under a microscope and the blood cell image reproduced on a CRT are different. As a result, users accustomed to visual inspection using a microscope may feel uncomfortable, and this may pose a problem when visually classifying blood cells based on the color tone of blood cell images on a CRT.

The purpose of the present invention is to correct the difference in color tone between the visual image by a microscope and the image reproduced on a CRT without changing the optical system and causing a decrease in classification accuracy. The aim is to process and improve image signals without any problems.

[Means to solve the problem]

The above purpose is achieved in a blood image automatic classification device.

The colors of images reproduced on a color CRT are limited, and can be roughly divided into seven colors: the white blood cell nucleus, two types of cytoplasm, two types of granules, red blood cells, and the background. These blood cell colors are calculated using colorimetric calculations. The ratio of the three primary colors (R:G:B) is determined by
R so that the ratio of B') is evenly close to the color of all images.
A circuit (
In combination with Equation (2)), more visible color reproduction is achieved.

[Effect]

This circuit converts image signals obtained from a TV camera for image processing, such as an automatic blood image classification device, into a CRT with the same color as the real image color.
Process as reproduced above.

The -th stage matrix calculation circuit converts the video output signal from the TV camera for image processing into a signal ratio that reproduces a color equal to the real image color, and applies it to the next stage γ correction circuit. The gamma correction circuit serves to correct the gamma characteristics of the CRT, and to individually apply gamma correction degrees to the R, G, and B signals, thereby improving the contrast of a specific part of the image and making the image more viewable. That is, in the γ correction characteristic shown in FIG. 2, in a portion where the level of the image signal is low, an output of a' is obtained for an input voltage of a, and the contrast of the image is improved by increasing the γ correction. On the other hand, the contrast between high-level images goes from b to b', and the smaller the γ correction, the higher the contrast, and depending on the degree of γ correction, the contrast of a specific partial force image can be improved by 6 or more. The two circuits reproduce colors close to the real image colors.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 3. FIG. 1 is a schematic diagram of an image display system of an automatic blood image classification device. The image information of the specimen 1 magnified by the microscope 2 is passed through a narrow band filter F p to obtain characteristics of blood cells.
, F a , F a6 and enters the image pickup tube of the TV camera, where it is converted into an electrical signal. This signal R'
, G', and B'. This signal is C
When inputting to RT, color reproduction is corrected through a mixing circuit 8 and a gamma correction circuit 9.

Correction of color reproduction will be explained using FIG. 3. The image processing signals R', G", B"' are corrected for color reproduction by a mixing circuit composed of an operational amplifier 16, a resistor 15 for determining a mixing coefficient, and the like. Next, C
The signal is input to a circuit 17 that corrects the γ characteristic of the RT 18. The mixing coefficient is determined so that each blood cell color is uniformly close to the real image color, and the magnitude of γ correction is determined based on the mixing circuit so that the contrast of the blood cell image is improved and color reproduction is not degraded. Adjusted between.

By adding this mixing circuit and γ correction circuit,
The color of the blood cells reproduced on the CRT was equal to the color tone of the image visually observed with a microscope, and the discomfort was eliminated.

〔Effect of the invention〕

According to the present invention, the color reproducibility of blood cell color can be improved simply by calculating the TV camera output signal for image processing, and there is no need to separately set up a TV camera exclusively for CRT display, making it possible to reduce costs. Helps improve image color reproduction.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a diagram showing the amount of change in luminance due to the γ characteristic of the B signal, and FIG. 3 is a mixing circuit and γ correction circuit diagram. 1...Specimen, 2...Microscope, 5...TV camera,
8... Mixing circuit, 9... γ correction circuit, 10.
・A/D converter, 11...CPU, 12...CRT
, 13... light source. 1st

Claims (1)

[Claims] 1. After enlarging the image of the specimen using a light source and a microscope, the image is displayed on a TV.
Classifying blood cell images using data obtained by capturing an image with a camera and A/D converting the output signal of the TV camera, and
An image display device for an automatic blood image classification device that displays an output signal of a camera on a color image display device, characterized in that a color correction circuit for the output signal of the TV camera is provided. 2. An image display device for an automatic blood image classification apparatus, characterized in that a γ correction circuit is added to the color correction circuit. 3. An image display device in an automatic blood image classification apparatus, wherein the color correction circuit multiplies each of the three output signals of the TV camera by a weighting coefficient, and adds the image signals multiplied by the weighting coefficients. . 4. An image display device in an automatic blood image classification apparatus, wherein the γ correction circuit is an amplifier circuit with nonlinear input/output characteristics.