Image processing device, mounting device, and image processing method

Patent metadata

Field	Value
Publication number	US-2023108672-A1
Application number	US-202017904493-A
Country	US
Kind code	A1
Filing date	Feb 21, 2020
Priority date	Feb 21, 2020
Publication date	Apr 6, 2023
Grant date	—

Abstract

An image processing device for processing an image of a tape in which multiple cavities for accommodating a component are provided along a predetermined feeding direction includes a generation section configured to extract brightnesses of pixels of a line along the feeding direction from the image and to generate a brightness waveform of the line, and a recognition section configured to execute a periodic analysis of a brightness change from the brightness waveform and to recognize a pitch of the cavities based on a wavelength obtained by the periodic analysis.

First claim

1 . An image processing device for processing an image of a tape in which multiple cavities for accommodating a component are provided along a predetermined feeding direction, comprising:
a generation section configured to extract brightnesses of pixels of a line along the feeding direction from the image and to generate a brightness waveform of the line; and a recognition section configured to execute a periodic analysis of a brightness change from the brightness waveform and to recognize a pitch of the cavities based on a wavelength obtained by the periodic analysis.

2 . The image processing device according to claim 1 ,
wherein the generation section generates a brightness waveform for each of multiple lines that are aligned in parallel in an orthogonal direction orthogonal to the feeding direction, and wherein the recognition section selects one or more the lines in the multiple lines in which a result of the periodic analysis corresponds to the recognized pitch and to recognize a center of the one or more the lines so selected in the orthogonal direction as a center of the cavity in the orthogonal direction.

3 . The image processing device according to claim 1 ,
wherein the recognition section executes the periodic analysis employing a normalized square difference function.

4 . An image processing device for processing an image of a tape in which component accommodating cavities are provided along a predetermined feeding direction at any certain pitch in multiple pitches, comprising:
an extraction section configured to extract brightnesses of pixels of a line along the feeding direction from the image from a predetermined reference position in the feeding direction at a minimum pitch in the multiple pitches; and a recognition section configured to obtain a pitch at which the brightnesses change to be smaller and larger based on a comparison of the brightnesses with a predetermined threshold and to recognize a pitch in the multiple pitches which corresponds to the pitch so obtained as a pitch of the cavities.

5 . A mounting device comprising a feeder attached thereto for feeding the tape and configured to mount the component supplied from the cavity in the tape, the mounting device comprising:
an imaging device configured to capture an image of the tape; the image processing device according to claim 1 ; and a control device configured to cause the feeder to feed the tape based on a pitch of the cavities which is recognized by the image processing device.

6 . An image processing method for processing an image of a tape in which multiple cavities for accommodating a component are provided along a predetermined feeding direction, comprising:
(a) a step of extracting brightnesses of pixels of a line along the feeding direction from the image and generating a brightness waveform of the line; and (b) a step of executing a periodic analysis of a brightness change from the brightness waveform and recognizing a pitch of the cavities based on a wavelength obtained by the periodic analysis.

7 . An image processing method for processing an image of a tape in which component accommodating cavities are provided along a predetermined feeding direction at any certain pitch in multiple pitches, comprising:
(a) a step of extracting brightnesses of pixels of a line along the feeding direction from the image from a predetermined reference position in the feeding direction at a minimum pitch in the multiple pitches; and (b) a step of obtaining a pitch at which the brightnesses change to be smaller and larger based on a comparison of the brightnesses with a predetermined threshold and recognizing a pitch in the multiple pitches which corresponds to the pitch so obtained as a pitch of the cavities.

Assignees

• Fuji Corp

Inventors

• Kito Shuichiro
• Kobayashi Takahiro
• Kotani Kazuya
• Mizutani Yutaka

Classifications

• G06V10/60

  relating to illumination properties, e.g. using a reflectance or lighting model · CPC title

• H05K13/0419

  tape feeders · CPC title

• G06V10/507

  Summing image-intensity values; Histogram projection analysis · CPC title

• G06T7/0002

  Inspection of images, e.g. flaw detection · CPC title

• G06T7/42

  using transform domain methods · CPC title