JPS5957365A - Discriminating circuit of back and belly of fish - Google Patents

Abstract

PURPOSE:To discriminate between the back and belly of a fish automatically by adding the density value of density distribution of a picture of a fish as divided into upper half and lower half. CONSTITUTION:A shaded picture data of a fish (A) is inputted to a contour extracting circuit 1, a line density addition circuit (upper) 2 and the same circuit (lower) 3. The circuit 1 extract the outside edge and performs integration, and extracts upper and lower coordinates ai, bi of contour (B) of the fish, and inputs this to a midline detecting circuit 4. The circuit 4 averages coordinate values of vertical line of the contour, and detects the midline ci. Circuits 2, 3 calculate added value for each line of density value in the parts between contour coordinates ai, bi and midline ci, ai-ci, ci-bi, and inputs to upper and lower row density addition circuits 5, 6. Circuits 5, 6 add this for each line, and calculate upper half and lower half density added values Ta, Tb, and send to a back/belly discriminating circuit 7. The circuit 7 compares Ta and Tb, and judges Ta having larger density as the back, and Tb having smaller density as the belly, and outputs the result D.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to an identification circuit that rapidly and stably determines the dorso-ventral position of a fish by utilizing a single difference in the dorso-ventral position of the fish body.

(2) Prior art and problems Conventionally, when sending collected fish to an automatic processing device, a process of identifying the dorsal and ventral parts of the fish body is applied. There is a method for extracting features regarding the shape of a fish from edge information, but this method has the disadvantage that the feature extraction process is complicated and necessary, and it lacks stability.

(3) Purpose of the Invention An object of the present invention is to provide a fish body dorsoventral discrimination circuit that uses the difference in the radius of the fish body to quickly and stably determine the dorsoventral position.

(4) Structure of the Invention In order to achieve the above object, the fish body dorsal and ventral identification circuit of the present invention includes a circuit for detecting the contour line of a fish body input as image data, a circuit for detecting the median line between the upper and lower contour lines, and a circuit for detecting the contour line of the fish body input as image data. The output signal from the circuit is provided with a circuit that adds or weights the image data of the lower half of the fish body and the lower half, and a circuit that compares the summed value or average value of the upper half and the lower half. It is characterized by:

(5) Examples of the invention The figure is a configuration explanatory diagram of an embodiment of the present invention.

First, a pre-processing circuit (not shown) performs noise processing on a carbonized image obtained by optically scanning the target fish body (2). The input data thus obtained is input to the contour extracting circuit 1, which performs edge detection, extracts outer edges, integrates the extraction points, etc. h1 Fish body contour @ upper and lower coordinates (ai, bi) Extract. This upper and lower contour line αi
, bi e is input into the median line detection circuit 4, and the coordinates of each vertical axis of the contour line are averaged and connected to detect the median line c().

Furthermore, the input data is added to the upper and lower row adder circuits 2,
5 in parallel, add the density direct of the part αi to Ct + C(□ bi between the contour N ai, b Calculate.The row value Atr Bt is input to the upper and lower column density calculation circuits 5 and 6, and added for each column, and the upper and lower halves are calculated once. ,z= :Ait Tb=XBi
Calculate. These values 1', Tb are sent to the dorsoventral determination circuit 7, and the values of T4 and Tb are compared, and the concentration of bT is determined as shown in the fish body O.

is the center, and the small Tb is added as the antagonal, and the result is output.

(6) As described in detail, according to the present invention, it is possible to add not only the shape but also the intensity value of the elegance distribution into the upper half and the lower half. By this method, the dorsal and ventral position of the fish body can be automatically determined. Thereby, it is possible to realize a fish body dorsal and ventral identification circuit with high speed and high gR rate.

[Brief explanation of drawings]

The figure is an explanatory diagram of the 4N configuration of the embodiment of the present invention. In the figure, 1 is the ring IS extraction circuit, 2 and 3 are the row a degree) AI calculation circuit, 4 is the median detection circuit, and 5 and 6 are the column a 7 indicates a dorsoventral determination circuit. Patent applicant Fujitsu Ltd. sub-agent Patent attorney 1) Yoshishige Saka

Claims (1)

[Claims] A circuit that detects the contour line of the fish body input as image data, a circuit that detects the midline between the upper and lower contour lines, and output signals from these circuits. A circuit for identifying dorsal and ventral fish bodies, comprising a circuit for adding or weighted averaging, and a circuit for comparing added values and average values of the upper and lower halves.