ImageQt | 数字图像处理——基于Qt 5.8.0 - Image viewer powered by Qt | Computer Vision library

by seahime C++ Version: Current License: No License

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kandi X-RAY | ImageQt Summary

ImageQt is a C++ library typically used in Artificial Intelligence, Computer Vision, Qt5 applications. ImageQt has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Image viewer powered by Qt 5.8.0.

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Quality

Security

License

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Support

ImageQt has a low active ecosystem.

It has 181 star(s) with 106 fork(s). There are 15 watchers for this library.

It had no major release in the last 6 months.

There are 0 open issues and 3 have been closed. On average issues are closed in 63 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of ImageQt is current.

Quality

ImageQt has no bugs reported.

Security

ImageQt has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

ImageQt does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

ImageQt releases are not available. You will need to build from source code and install.

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ImageQt Key Features

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ImageQt Examples and Code Snippets

No Code Snippets are available at this moment for ImageQt.

Community Discussions

Trending Discussions on ImageQt

PyQt5: Python crashes with SIGSEGV *sometimes* when sending pixmap via a signal from another thread

How to texture a sphere in PyQt5 QOpenGLWidget

pyinstaller does not work with with pyqt5 and matplotlib

How to use pyinstaller with matplotlib in use

Zooming image on QGraphicsScene with mouse wheel in pyqt5

QGraphicsView antialiasing algorithm doesn't work well with very small details

InterfaceError: Error binding parameter 4 - probably unsupported type.for image and blob image does not display on QTLabel

QGraphicsScene. How do I draw an ellipse over a loaded image in pyqt5?

Python Pillow library install error in termux

how can i use the Qmouseevent in Qgraphicscene

QUESTION

PyQt5: Python crashes with SIGSEGV *sometimes* when sending pixmap via a signal from another thread

Asked 2021-Jan-26 at 16:54

Background and Issue

I am trying to process streaming data from a camera. Python keeps crashing with this message though:

...

ANSWER

Answered 2021-Jan-26 at 16:49

Firstly, it's not safe to use QPixmap outside the main thread. So you should use QImage instead.

Secondly, ImageQt shares the buffer from the Image passed to it. So if the buffer is deleted while the Qt image is still alive, a crash will very likely ensue. You might need to copy the Qt image to prevent this happening if you can't keep hold of the PIL image for long enough.

Source https://stackoverflow.com/questions/65873994

QUESTION

How to texture a sphere in PyQt5 QOpenGLWidget

Asked 2020-Dec-01 at 20:08

I'm trying to display a map of the world in a program I've made using PyQt5. For the rendering stuff so far this is the (mostly borrowed) code I have:

...

ANSWER

Answered 2020-Nov-28 at 07:32

You have to create a texture object:

Source https://stackoverflow.com/questions/65032638

QUESTION

pyinstaller does not work with with pyqt5 and matplotlib

Asked 2020-Nov-17 at 19:08

im using pyqt5 to create a gui and using matplotlib

but whene i try to create executable with pyinstaller it dose not work

i try a few solution like :

1- Can't create working PyQt5 Python executable with PyInstaller/

2- In PyInstaller, Why Won't NumPy.Random.Common Load as a Module?

3- Python SSL Import Error in PyInstaller generated executable

i try to do it with cx_Freeze and try this solution cx_Freeze error: baseline image directory does not exist

but nothing work with me

this is my log after using pyinstaller

...

ANSWER

Answered 2020-Nov-17 at 18:45

You can try and downgrade your matplotlib version, which you don't seem to mention. 3.1.3 fixed it in my case using PyInstaller and PyQt5.

Source https://stackoverflow.com/questions/64878957

QUESTION

How to use pyinstaller with matplotlib in use

Asked 2020-Sep-26 at 15:15

I have this script that I attached a GUI to the front of and wanted to distribute it to other DnD DMs for them to use to overlay grids onto images. Only issue is that everytime I try to package the python script using Pyinstaller, it keeps throwing two different errors. If I run pyinstaller --hidden-import matplotlib myscript.py it returns

...

ANSWER

Answered 2020-Sep-26 at 15:15

You can try to solve this problem by installing older versions of the matplotlib package. eg:

Source https://stackoverflow.com/questions/63163027

QUESTION

Zooming image on QGraphicsScene with mouse wheel in pyqt5

Asked 2020-Aug-28 at 15:02

I have a code that opens the video, extracts the first frame from it, saves as an image, opens the image and displays it on QGraphicsScene. And I have a question - how can I zoom in and out an image with the mouse wheel?

Code OFT_MainWindow

...

ANSWER

Answered 2020-Aug-28 at 15:02

You have to install an event filter to the graphics view's viewport(), and check for Wheel events.

Source https://stackoverflow.com/questions/63634323

QUESTION

QGraphicsView antialiasing algorithm doesn't work well with very small details

Asked 2020-Aug-27 at 23:45

the problem i had with QGraphicsView it shows images (Pillow generated images) with low quality that i can't read the text on image however i can see details better if i zoomed but on its full size it's not clear and very disappointing.

here is two samples one of the problem and one of wut it should be fixed to.

QGraphicsView scene quality problem

and this

same image opened from windows image viewer with same size: link for sample: https://imgur.com/a/JINAq4S

the code sample which will cover the issue. font link: https://gofile.io/d/dXesZv

...

ANSWER

Answered 2020-Aug-27 at 23:43

eventually I came up to kinda an answer to my question:

the issue was:

QGraphicsView's performance with high resolution images is poor (can't read small details in image) as antialiasing algorithm doesn't work well with very small details.

what I tried, helped but never solved:

I used .setTransformationMode(QtCore.Qt.SmoothTransformation) and .setRenderHints(QtGui.QPainter.Antialiasing | QtGui.QPainter.HighQualityAntialiasing) which helped.

what I gave away to solve it:

I resized the high resolution image to a smaller resolution that can be viewed a good quality with the ability to read small details like small text.

how i resized the image:-

the image used in the scene is a pillow object so i used the method .resize((int(image.size[0]/3.5), int(image.size[1]/3.5)), Image.ANTIALIAS), notice 1/3.5 ratio is optional.

Source https://stackoverflow.com/questions/63573531

QUESTION

InterfaceError: Error binding parameter 4 - probably unsupported type.for image and blob image does not display on QTLabel

Asked 2020-Aug-26 at 19:15

from PyQt5.QtWidgets import *
from PyQt5 import QtWidgets, QtGui

from PIL import Image, ImageQt    
import cv2 as cv
img =  cv.imread('1.1 cat.jpeg.jpeg')
im = Image.fromarray(img)
im.save('file.png')

con = lite.connect('Final_Avirs.db')
cur = con.cursor()
def createtb():
    queryveh = """CREATE TABLE IF NOT EXISTS VehicleTB(Scan_DI  INTEGER PRIMARY KEY NOT NULL UNIQUE,
    Vehicle_number  TEXT NOT NULL, Vehicle_type TEXT NOT NULL, Cam_loc  TEXT NOT NULL, Date_Time    TEXT NOT NULL, 
    Vehicle_number_pic BLOB NOT NULL) """
 

    cur.execute(queryveh)
    con.commit()

def vehicledetailsquery(vn, vt, cl, dt, vnp):
    scan_id = vn + "1"
    query = " INSERT INTO 'VehicleTB' ( Vehicle_number, Vehicle_type, Cam_loc, " \
            "Date_Time, Vehicle_number_pic ) VALUES( ?, ?, ?, ?, ?)"
    cur.execute(query, (vn, vt, cl, dt, vnp))
    con.commit()
    
img = Image.open('file.png')
createtb()

vehicledetailsquery('aswe23','2039230', 'cam-2', '23343', img )

app = QtWidgets.QApplication([])
def vehicletbquery():
    query = "SELECT * from VehicleTB"
    vehicletb = cur.execute(query).fetchall()
    return vehicletb
data = vehicletbquery()

ww = QtWidgets.QLabel()
for i, d in enumerate(data):
    if i == 6:
        ww.w.setPixmap(QtGui.QPixmap.fromImage(d))
        
ww.show()
app.exec()

...

ANSWER

Answered 2020-Aug-26 at 19:15

The data type BLOB save bytes, in your case you are trying to save a PIL object throwing the error. The solution is to convert those objects. Then the same happens with the data obtained from the database but in reverse:

Source https://stackoverflow.com/questions/63600683

QUESTION

QGraphicsScene. How do I draw an ellipse over a loaded image in pyqt5?

Asked 2020-Aug-21 at 11:02

I have a QGraphicsView with a QGraphicsScene. On QGraphicsScene, I output the image using QGraphicsPixmapItem. And I would like to draw an ellipse over the image with my mouse. I have that code now. And the ellipse is drawn on MainWindow. What do I need to do to have the ellipse drawn on an image in QGraphicsView?

Code OFT_MainWindow

...

ANSWER

Answered 2020-Aug-21 at 11:02

If you want to paint something on a QGraphicsView, you have to add QGraphicsItem to its scene, otherwise you're making almost useless to crete a QGraphicsView to begin with.

One possible solution is to install an event filter on the scene, listen for mouse button events and draw an ellipse (using QGraphicsEllipseItem) on the scene if the first click is done within the contents of a QGraphicsPixmapItem.

Note that another possibility is to subclass from QGraphicsPixmapItem and implement its mouse events instead. It all depends on what you're going to do and what you're going to need from your program.

Source https://stackoverflow.com/questions/63488873

QUESTION

Python Pillow library install error in termux

Asked 2020-Jul-26 at 21:33

I am using my Termux in the mobile... Some time ago I am installed pillow on mobile and this is working correctly. But when I am installing it now this is showing the following error. All Pip and Other Upgrade are up to date.I am Searched for it on web but doesn't found anything. Can Anybody help me please.. Here is the Error.

...

ANSWER

Answered 2020-Jul-26 at 21:33

You should try below commands, those worked for me :

Source https://stackoverflow.com/questions/62956054

QUESTION

how can i use the Qmouseevent in Qgraphicscene

Asked 2020-Jul-05 at 17:31

i try to create a program to manipulate images,I want to have the position of the mouse when it is in the Qgraphicscene, but the event of the mouse is not triggered unless I start outside the Qgraphicview, how can i get this position with the coordinates of the image (pixles) and thank you for the help

...

ANSWER

Answered 2020-Jul-05 at 17:31

Widgets receive mouse move events only when mouseTracking is enabled (which is disabled by default for most widgets).

Also, if you want to track the mouse events in a graphics scene, you have to override the scene's mouseMoveEvent or install an event filter.

Note that I removed the following line in the __init__:

Source https://stackoverflow.com/questions/62742383

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