SU531308A1 - Device for calculating the differential density-area histogram - Google Patents

Claims (2)

com 5, the sync block 5 through a voltage generator 6 is connected to the code generator 7 connected to the sensor 8 of a half-tone television signal. The output of the driver code 7 is connected to the cathode of the transmitting television tube 1, the target of which through the video amplifier 3 is connected to the counter 9. The second input of the counter 9 is connected to a counting pulse generator Yu, which, in turn, is connected to the sync block 5. At the output of the counter 9 is turned on The recorder 11. The device works as follows. Before the start of the analysis cycle, the target of the tube 1 is illuminated by a light pulse generated by the sweep generator. 2. The target acquires a certain positive potential (J (see Fig. 2a, 1st frame). The video signal from the image under study from sensor 8 goes to the code generator 7, in which pulses are formed that control the current of tube 1 , The level of the limitation in the code generator 7 is set by the step voltage generator 6, the level change occurs with the frequency of the frame sync pulses coming from the sync block 5. The sequence of pulses of the first limitation level (see Fig. 25, frame 1) during the first frame (or half frame) served to the cathode of tube 1, if their amplitude is UU-d, then for a time equal to the duration of the pulses of this level, the beam is reflected from the target and the potential relief in these areas remains unchanged. In the intervals between the pulses (see Fig. 2 6) reading the potential relief, so the sum of the pulses of the output current during the first frame will determine the image area with the minimum optical density. The relief remaining on the target corresponds to the sequence of the first level of limitation (see FIG. 2a, 2nd frame). In the second frame, the cathode of the tube 1 receives the pulses of the second limiting level (see Fig. 2, 5, the 2nd frame), etc. Thus, the pulses of the output current in each frame of one analysis cycle carry information about the value of one of the bits histograms. To obtain a numerical equivalent of these bits, the current pulses are controlled by a counter 9, to which the counting pulses are received from the 1O generator (see Fig. 2, d, e). The counter 9 is reset after each analysis frame by a pulse, from the sync block 5, K The output of the counter 9 is connected to the recorder 11 in the form of a digital scoreboard, a digital printing machine, a perforator, and so on. Claim of the Invention A device for calculating the differential distribution histogram Optic density-area containing a television television tube, for example it, the sweep generators connected to the transmitting television tube by the outputs, the driver of the codes whose output is connected to the cathode of the transmitting television tube, the video amplifier whose input is connected to the target of the transmitting television tube, the unit for illuminating the target of the transmitting television tube and the recorder whose inputs are connected With a sync block, characterized in that, in order to match the speed, a halftone television signal sensor is introduced, the output of which is connected to the first input of the driver code a second input connected to the output of sync generator through stepwise voltage and counter pervsh input coupled to an output video amplifier, the second - after counting pulses from a sync generator, and an output - to a second input of the recorder. FIG. one S n n n liifp -iii ich nn 2h FIG. 2