ImageMagick Perspective distortion draws shadow, how to prevent it
i have a problem with ImageMagick (PHP version), when i make perspective distortion for a photo, for some new posints (sharp shapes) it draws gray shadows on the result image, i think it's like 3D Shadows of the object, but i can not prevent it from coming in !
here is my code:
$controlPoints= array(
$oldPoints[0] , $oldPoints[1] , $newPoints[0] , $newPoints[1],
$oldPoints[2] , $oldPoints[3] , $newPoints[2] , $newPoints[3],
$oldPoints[4] , $oldPoints[5] , $newPoints[4] , $newPoints[5],
$oldPoints[6] , $oldPoints[7] , $newPoints[6] , $newPoints[7]);
$imagick = new imagick();
$imagick->readimageblob($data);
$imagick->setImageMatte(true);
$imagick->setImageVirtualPixelMethod(Imagick::VIRTUALPIXELMETHOD_TRANSPARENT);
$imagick->distortImage( Imagick::DISTORTION_PERSPECTIVE, $controlPoints, TRUE );
could you please help me, is there any suggestions ?
I tried to remove this gray color from the image result, but it's not good solution if the original photo has the same color in it.
Regards
Hani
php imagemagick
asked Nov 27 '18 at 8:51
WaelWael
2761313
add a comment |
i have a problem with ImageMagick (PHP version), when i make perspective distortion for a photo, for some new posints (sharp shapes) it draws gray shadows on the result image, i think it's like 3D Shadows of the object, but i can not prevent it from coming in !
here is my code:
$controlPoints= array(
$oldPoints[0] , $oldPoints[1] , $newPoints[0] , $newPoints[1],
$oldPoints[2] , $oldPoints[3] , $newPoints[2] , $newPoints[3],
$oldPoints[4] , $oldPoints[5] , $newPoints[4] , $newPoints[5],
$oldPoints[6] , $oldPoints[7] , $newPoints[6] , $newPoints[7]);
$imagick = new imagick();
$imagick->readimageblob($data);
$imagick->setImageMatte(true);
$imagick->setImageVirtualPixelMethod(Imagick::VIRTUALPIXELMETHOD_TRANSPARENT);
$imagick->distortImage( Imagick::DISTORTION_PERSPECTIVE, $controlPoints, TRUE );
could you please help me, is there any suggestions ?
I tried to remove this gray color from the image result, but it's not good solution if the original photo has the same color in it.
Regards
Hani
php imagemagick
asked Nov 27 '18 at 8:51
WaelWael
2761313
1
The gray shape is the area above the "horizon" so it is outside the domain of the image. You need to add the PHP equivalent of -mattecolor none. See imagemagick.org/Usage/distorts/#horizon. Sorry I do not know Imagick well enough to know if it supports that equivalent.
– fmw42
Nov 27 '18 at 16:53
@fmw42 thank you so much. You answer has helped me. i just add the horizon color with: $imagick->setImageMatteColor("rgb(255,255,255,0)"); and it works :)
– Wael
Nov 27 '18 at 19:43
add a comment |
i have a problem with ImageMagick (PHP version), when i make perspective distortion for a photo, for some new posints (sharp shapes) it draws gray shadows on the result image, i think it's like 3D Shadows of the object, but i can not prevent it from coming in !
here is my code:
$controlPoints= array(
$oldPoints[0] , $oldPoints[1] , $newPoints[0] , $newPoints[1],
$oldPoints[2] , $oldPoints[3] , $newPoints[2] , $newPoints[3],
$oldPoints[4] , $oldPoints[5] , $newPoints[4] , $newPoints[5],
$oldPoints[6] , $oldPoints[7] , $newPoints[6] , $newPoints[7]);
$imagick = new imagick();
$imagick->readimageblob($data);
$imagick->setImageMatte(true);
$imagick->setImageVirtualPixelMethod(Imagick::VIRTUALPIXELMETHOD_TRANSPARENT);
$imagick->distortImage( Imagick::DISTORTION_PERSPECTIVE, $controlPoints, TRUE );
could you please help me, is there any suggestions ?
I tried to remove this gray color from the image result, but it's not good solution if the original photo has the same color in it.
Regards
Hani
php imagemagick
asked Nov 27 '18 at 8:51
WaelWael
2761313
i have a problem with ImageMagick (PHP version), when i make perspective distortion for a photo, for some new posints (sharp shapes) it draws gray shadows on the result image, i think it's like 3D Shadows of the object, but i can not prevent it from coming in !
here is my code:
$controlPoints= array(
$oldPoints[0] , $oldPoints[1] , $newPoints[0] , $newPoints[1],
$oldPoints[2] , $oldPoints[3] , $newPoints[2] , $newPoints[3],
$oldPoints[4] , $oldPoints[5] , $newPoints[4] , $newPoints[5],
$oldPoints[6] , $oldPoints[7] , $newPoints[6] , $newPoints[7]);
$imagick = new imagick();
$imagick->readimageblob($data);
$imagick->setImageMatte(true);
$imagick->setImageVirtualPixelMethod(Imagick::VIRTUALPIXELMETHOD_TRANSPARENT);
$imagick->distortImage( Imagick::DISTORTION_PERSPECTIVE, $controlPoints, TRUE );
could you please help me, is there any suggestions ?
I tried to remove this gray color from the image result, but it's not good solution if the original photo has the same color in it.
Regards
Hani
php imagemagick
php imagemagick
asked Nov 27 '18 at 8:51
WaelWael
2761313
asked Nov 27 '18 at 8:51
WaelWael
2761313
edited Nov 27 '18 at 9:08
Wael
asked Nov 27 '18 at 8:51
WaelWael
2761313
asked Nov 27 '18 at 8:51
WaelWael
2761313
asked Nov 27 '18 at 8:51
WaelWael
2761313
2761313
1
The gray shape is the area above the "horizon" so it is outside the domain of the image. You need to add the PHP equivalent of -mattecolor none. See imagemagick.org/Usage/distorts/#horizon. Sorry I do not know Imagick well enough to know if it supports that equivalent.
– fmw42
Nov 27 '18 at 16:53
@fmw42 thank you so much. You answer has helped me. i just add the horizon color with: $imagick->setImageMatteColor("rgb(255,255,255,0)"); and it works :)
– Wael
Nov 27 '18 at 19:43
add a comment |
1
The gray shape is the area above the "horizon" so it is outside the domain of the image. You need to add the PHP equivalent of -mattecolor none. See imagemagick.org/Usage/distorts/#horizon. Sorry I do not know Imagick well enough to know if it supports that equivalent.
– fmw42
Nov 27 '18 at 16:53
@fmw42 thank you so much. You answer has helped me. i just add the horizon color with: $imagick->setImageMatteColor("rgb(255,255,255,0)"); and it works :)
– Wael
Nov 27 '18 at 19:43
1
1
The gray shape is the area above the "horizon" so it is outside the domain of the image. You need to add the PHP equivalent of -mattecolor none. See imagemagick.org/Usage/distorts/#horizon. Sorry I do not know Imagick well enough to know if it supports that equivalent.
– fmw42
Nov 27 '18 at 16:53
The gray shape is the area above the "horizon" so it is outside the domain of the image. You need to add the PHP equivalent of -mattecolor none. See imagemagick.org/Usage/distorts/#horizon. Sorry I do not know Imagick well enough to know if it supports that equivalent.
– fmw42
Nov 27 '18 at 16:53
@fmw42 thank you so much. You answer has helped me. i just add the horizon color with: $imagick->setImageMatteColor("rgb(255,255,255,0)"); and it works :)
– Wael
Nov 27 '18 at 19:43
@fmw42 thank you so much. You answer has helped me. i just add the horizon color with: $imagick->setImageMatteColor("rgb(255,255,255,0)"); and it works :)
– Wael
Nov 27 '18 at 19:43
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53495803%2fimagemagick-perspective-distortion-draws-shadow-how-to-prevent-it%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53495803%2fimagemagick-perspective-distortion-draws-shadow-how-to-prevent-it%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
1
The gray shape is the area above the "horizon" so it is outside the domain of the image. You need to add the PHP equivalent of -mattecolor none. See imagemagick.org/Usage/distorts/#horizon. Sorry I do not know Imagick well enough to know if it supports that equivalent.
– fmw42
Nov 27 '18 at 16:53
@fmw42 thank you so much. You answer has helped me. i just add the horizon color with: $imagick->setImageMatteColor("rgb(255,255,255,0)"); and it works :)
– Wael
Nov 27 '18 at 19:43