JPH02865U

JPH02865U -

Info

Publication number: JPH02865U
Application number: JP7741188U
Authority: JP
Priority date: 1988-06-10
Filing date: 1988-06-10
Publication date: 1990-01-05

Description

[Brief explanation of drawings]

第１図は本考案の一実施例のブロツク図、第２
図は第１図の実施例の制御回路の動作を説明する
ための流れ図である。１…原稿、２…原稿台、３…移動走査台、３ａ
…ＣＣＤ、４…パルスモータ、５…駆動パルス送
出回路、６…駆動パルス計数回路、７，８…計数
回路、９…画信号処理回路、１０…制御回路、１
１…操作部、Ａ…白マスクしたい領域、Ｋ…駆動
パルス、Ｌ…画信号、Ｍ…計数値、Ｎ，Ｏ…起動
信号、Ｐ，Ｑ…計数完了信号、Ｒ…白マスク画信
号。 Fig. 1 is a block diagram of an embodiment of the present invention;
This figure is a flowchart for explaining the operation of the control circuit of the embodiment shown in FIG. 1...Original, 2...Document table, 3...Moving scanning table, 3a
... CCD, 4... Pulse motor, 5... Drive pulse sending circuit, 6... Drive pulse counting circuit, 7, 8... Counting circuit, 9... Image signal processing circuit, 10... Control circuit, 1
1...Operation unit, A...Area to be white masked, K...Drive pulse, L...Picture signal, M...Count value, N, O...Start signal, P, Q...Count completion signal, R...White mask picture signal.

Claims

[Scope of utility model registration request]

A flat document table on which a document is set; a movable scanning table which moves along the document table and reads the document with a mounted CCD and outputs an image signal for each line consisting of a plurality of pixel data; and the movable scanning table. a pulse motor that drives the pulse motor, a drive pulse sending circuit that supplies drive pulses to the pulse motor, and a drive pulse counter that inputs the drive pulse, counts the number of drive pulses from the sub-scanning start point, and outputs the counted value. A first set value is set each time the circuit is activated, and when the pixel data from the main scanning start point for each line is counted and the first set value is reached, a first output signal is enabled. A first counting circuit, a second set value larger than the first set value is set each time the circuit is activated, and counts the pixel data from the main scanning start point for each line to the second set value. a second counting circuit that validates a second output signal when the second output signal is reached, and replaces the pixel data with white data for a period during which the second output signal is valid after the first output signal becomes valid; the first and second set values indicating the number of pixel data from the main scanning start point for each line from the coordinate position with respect to the specified area of the input document; and the sub-scanning start. A first number of driving pulses and a second number of driving pulses are set corresponding to a first number of lines from a point to a first line and a second number of lines from a point to an end line for the specified area, respectively. When the count value from the drive pulse counting circuit reaches the first number of drive pulses, the first and second set values are set in the first and second counting circuits, respectively, and the second drive pulse is output. When the number reaches the first
and a control circuit for canceling the setting of the second set value.