Resizing tiff files without resample option in Photoshop SDK

Hi,
We am facing the below issue with Adobe Photoshop CS2.
We are trying to automate resizing of TIFF files in Photoshop using SDK. We were able to achieve this perfectly by defining in terms of percentage but when we try to do the same using without resample option programmatically, we are facing difficulties because with this option SDK allows us to pass the values in terms of Resolution only. We also tried to put a formula to compute the resolution to resize the image to a desired width but the formula does not yield a perfect result at all times.
Can anyone please let us know if there is any formula to resize an image to a desired size by passing the value in terms of Resolution or probably guide us where we can find help to resolve this issue.
Thanks & regards,
Rajeev

With the image open in Photoshop, it's dpi would affect:
1) Text size if you have Type set at Pixels or Points in preferences, (which is why it is not a bad idea to set it to Pixels so you'll have some idea of how big text will apear in your images).
2) Grid density (Ctrl/Command '). When I want to change the grid density, I generally open the Image size dialogue box; turn of resample, and change the DPI. But I find I don't need to do that so often since setting both Print and Screen dpi to 300dpi in the New Document preferences.
3) How big it will print. I once took in three full res images to be be made into canvas prints and gave the sho a size. When I collected them only one was at the size I'd asked for, and the other two were much smaller because he'd gone by the DPI and print size. I was not happy!
Other than the above three things, (and any other that I can't think of) pixels are pixels and dpi only affects how thickly or thinly they are spread throughout your image.

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Hi,
Windows 32-bit OS cannot open TIFF files bigger than 4GB. I need to work on TIFF files that have a size up to 10GB. Does Photoshop support this?
Thanks,

The scanned files come from a big Roche cells scanner. Computers which have the Roche utility software can open it and those computer are in 32-bit or 64bit. I have even downloaded a TIFF image, from the nasa site, of 25GB and i could open it on my 32bit Windows OS.
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#target bridge
if (ExternalObject.AdobeXMPScript == undefined) {
ExternalObject.AdobeXMPScript = new ExternalObject('lib:AdobeXMPScript');
var test = new File ("~/Desktop/Test.jpg");
var xmp = test.metadata;
alert(xmp);
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I remember to use metadata for reading the currently selected image in Content panel of Bridge (and it worked), but never tried direrctly declaring a file and reading this way.
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Thank you very much
Gustavo.
Message was edited by: Gustavo Del Vechio

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This might do it...
It will save the individual files in a folder called filechop off the files path.
#target photoshop
function main(){
if(!documents.length) return;
var dlg=
"dialog{text:'Script Interface',bounds:[100,100,380,290],"+
"panel0:Panel{bounds:[10,10,270,180] , text:'' ,properties:{borderStyle:'etched',su1PanelCoordinates:true},"+
"title:StaticText{bounds:[60,10,220,40] , text:'File Chop' ,properties:{scrolling:undefined,multiline:undefined}},"+
"panel1:Panel{bounds:[10,40,250,130] , text:'' ,properties:{borderStyle:'etched',su1PanelCoordinates:true},"+
"statictext1:StaticText{bounds:[10,10,111,30] , text:'Accross' ,properties:{scrolling:undefined,multiline:undefined}},"+
"statictext2:StaticText{bounds:[140,10,230,27] , text:'Down' ,properties:{scrolling:undefined,multiline:undefined}},"+
"across:DropDownList{bounds:[10,30,100,50]},"+
"down:DropDownList{bounds:[140,30,230,50]},"+
"saveFiles:Checkbox{bounds:[10,60,230,80] , text:'Save and Close new files?'}},"+
"button0:Button{bounds:[10,140,110,160] , text:'Ok' },"+
"button1:Button{bounds:[150,140,250,160] , text:'Cancel' }}};"
var win = new Window(dlg,'File Chop');
if(version.substr(0,version.indexOf('.'))>9){
win.panel0.title.graphics.font = ScriptUI.newFont("Georgia","BOLD",20);
g = win.graphics;
var myBrush = g.newBrush(g.BrushType.SOLID_COLOR, [1.00, 1.00, 1.00, 1]);
g.backgroundColor = myBrush;
var myPen =g.newPen (g.PenType.SOLID_COLOR, [1.00, 0.00, 0.00, 1],lineWidth=1);
win.center();
for(var i=1;i<31;i++){
   win.panel0.panel1.across.add ('item', i);
   win.panel0.panel1.down.add ('item', i);
win.panel0.panel1.across.selection=0;
win.panel0.panel1.down.selection=0;
var done = false;
    while (!done) {
      var x = win.show();
      if (x == 0 || x == 2) {
        win.canceled = true;
        done = true;
      } else if (x == 1) {
        done = true;
if(!documents.length)return;
var startRulerUnits = preferences.rulerUnits;
preferences.rulerUnits = Units.PIXELS;
doc = app.activeDocument;
app.displayDialogs = DialogModes.NO;
doc.flatten();
var tilesAcross = parseInt(win.panel0.panel1.across.selection.index)+1;
var tilesDown =parseInt(win.panel0.panel1.down.selection.index)+1;
var tileWidth = parseInt(doc.width/tilesAcross);
var tileHeight = parseInt(doc.height/tilesDown);
var SaveFiles = win.panel0.panel1.saveFiles.value;
ProcessFiles(tilesDown,tilesAcross,tileWidth,tileHeight,SaveFiles);
app.preferences.rulerUnits = startRulerUnits;
main();
function ProcessFiles(Down,Across,offsetX,offsetY,SaveFiles){
try{
var newName = activeDocument.name.match(/(.*)\.[^\.]+$/)[1];
}catch(e){var newName="UntitledChop"}
var Path='';
try{
Path = activeDocument.path;
}catch(e){Path = "~/Desktop";}
if(SaveFiles){
Path = Folder(decodeURI(Path) +"/FileChop");
if(!Path.exists) Path.create();
TLX = 0; TLY = 0; TRX = offsetX; TRY = 0;
BRX = offsetX; BRY = offsetY; BLX = 0; BLY = offsetY;
for(var a = 0; a < Down; a++){
for(var i = 0;i <Across; i++){
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if(SaveFiles){
var saveFile = File(decodeURI(Path+"/"+NewFileName+".jpg"));
SaveJPEG(saveFile, 10);
app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
    activeDocument = documents[0];
TLX = offsetX * (i+1) ; TRX = TLX + offsetX; BRX = TRX; BLX = TLX;
TLX = 0; TLY = offsetY * (a +1); TRX = offsetX; TRY = offsetY * (a +1);
BRX = offsetX; BRY = TRY + offsetY; BLX = 0; BLY = (offsetY * (a +1)+offsetY);
if(SaveFiles){
Path.execute()
function SaveJPEG(saveFile, jpegQuality){
jpgSaveOptions = new JPEGSaveOptions();
jpgSaveOptions.embedColorProfile = true;
jpgSaveOptions.formatOptions = FormatOptions.STANDARDBASELINE;
jpgSaveOptions.matte = MatteType.NONE;
jpgSaveOptions.quality = jpegQuality;
activeDocument.saveAs(saveFile, jpgSaveOptions, true,Extension.LOWERCASE);

Photoshop Opens 8bit TIFF files as Camera Raw

My normal workflow consists of opening RAW files in ACR, making adjustments, then moving on to Photoshop where I apply retouching and build clipping paths. I then save the file as an 8bit TIFF. I rarely reopen these 8bit TIFFs again, but when I did so recently what I encountered was not what I expected.
My Photoshop (CS6) is opening 8bit TIFF files as Camera Raw when selected by "right click" followed by "Open with Photoshop CS6". I remember being able to open 8bit TIFF files directly in Photoshop, but I think this change has occurred since installing CS6.
Again, files in question began as 16bit Raw files, but were worked on in Photoshop CS6 (retouching) and saved with clipping paths. This would reduce them to 8bit files. When placed in page layout, clipping paths work properly, confirming that paths are intact.
When I want to open the files again - say from Bridge or a Finder window - by the method "right click - Open with Photoshop CS6", the file is opened first in Camera Raw, and then in Photoshop, and the path(s) is missing.
I can open these TIFF files and access Paths but only if I locate and select the file from within Photoshop (File/ Open.../). The Open window gives "Format" as Camera Raw (which it isn't, having been saved as 8bit file). If I override format to "TIFF", the file opens with clipping path shown.
What might be going on here and how can I correct it?

DaleH wrote:
I set the preference to automatically open JPEGs and TIFFs with settings.
That's the reason for Adobe Camera Raw being automatically used to open TIFFs which were previously sent from ACR to Photoshop. The TIFFs have ACR settings because they originated as images generated from raw files by ACR. If you don't want ACR to be invoked when opening such files by a right-click then set the preference to "Disable TIFF support".
DaleH wrote:
I didn't manually set the bit depth.
When I saved the file with a clipping path it automatically dropped down to 8bit.
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OK, this might be a stupid question, but, here it goes.
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Thanks for the reply.
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Hello!
my coworker is running a powerPC g4 1.25 running 10.4.6 w/ 2gb RAM. Since he has upgraded to 10.4.6, he has photoshop crash on him most everyday. after hearing him gripe about this, i decided to find a solution. we've tried deleting the preference file, removing questionable fonts, and reinstalling CS to no avail.
here is the error he received today when trying to save a flatted tiff file to his documents folder.
Any Advice?
Exception: EXCBADACCESS (0x0001)
Codes: KERNPROTECTIONFAILURE (0x0002) at 0x00000100
Thread 0 Crashed:
0 libSystem.B.dylib 0x90002e84 getenv + 116
1 libSystem.B.dylib 0x90020e18 tzset_basic + 44
2 libSystem.B.dylib 0x900203fc localtime + 188
3 ...ple.CoreServices.CarbonCore 0x90bae6fc DoUNIXToMacDate + 48
4 ...ple.CoreServices.CarbonCore 0x90bcbb04 GetTimeSeconds + 56
5 application 0x02760c4c 0x2008000 + 7703628
6 application 0x0275fec0 0x2008000 + 7700160
Thread 1:
0 libSystem.B.dylib 0x9000b0a8 machmsgtrap + 8
1 libSystem.B.dylib 0x9000affc mach_msg + 60
2 ...ple.CoreServices.CarbonCore 0x90bad5ec TSexception_listenerthread + 112
3 libSystem.B.dylib 0x9002ba68 pthreadbody + 96
Thread 2:
0 libSystem.B.dylib 0x9002edcc kevent + 12
1 com.apple.DesktopServices 0x9288a2b0 TFSNotificationTask::FSNotificationTaskProc(void*) + 56
2 ...ple.CoreServices.CarbonCore 0x90bc9260 PrivateMPEntryPoint + 76
3 libSystem.B.dylib 0x9002ba68 pthreadbody + 96
Thread 3:
0 libSystem.B.dylib 0x9002c128 semaphorewait_signaltrap + 8
1 libSystem.B.dylib 0x90030bec pthreadcondwait + 480
2 ...ple.CoreServices.CarbonCore 0x90bc9450 MPWaitOnQueue + 224
3 com.apple.DesktopServices 0x9288a92c TNodeSyncTask::SyncTaskProc(void*) + 116
4 ...ple.CoreServices.CarbonCore 0x90bc9260 PrivateMPEntryPoint + 76
5 libSystem.B.dylib 0x9002ba68 pthreadbody + 96
Thread 4:
0 libSystem.B.dylib 0x9004838c getdirentriesattr + 12
1 ...ple.CoreServices.CarbonCore 0x90b9cf2c GetBulkAttrCore(VolumeInfo*, int, unsigned long, unsigned long, unsigned long*, unsigned long, FSAttributeInfo*, unsigned long, unsigned char*) + 288
2 ...ple.CoreServices.CarbonCore 0x90b9cd84 VolFSMount::getattrsbulk(void*, unsigned long, unsigned long*, unsigned long, unsigned long, FSAttributeInfo*, unsigned char*) + 120
3 ...ple.CoreServices.CarbonCore 0x90b9cacc PBGetCatalogInfoBulkSync + 388
4 ...ple.CoreServices.CarbonCore 0x90b9c91c FSGetCatalogInfoBulk + 64
5 com.apple.DesktopServices 0x928ac6e0 TFSIterator::Next(TFSInfo&) + 144
6 com.apple.DesktopServices 0x928ac57c TDeepFSIterator::NextInternal(TFSInfo&, long&, long&) + 108
7 com.apple.DesktopServices 0x928ac4a0 TDeepFSIterator::Next(TFSInfo&) + 36
8 com.apple.DesktopServices 0x928abdb8 THFSPlusSizer::Sizing(TFSInfo const&) + 100
9 com.apple.DesktopServices 0x928abd18 THFSPlusSizer::Size() + 56
10 com.apple.DesktopServices 0x928ab924 TFolderSizeTask::FolderSizeTaskProc(void*) + 236
11 ...ple.CoreServices.CarbonCore 0x90bc9260 PrivateMPEntryPoint + 76
12 libSystem.B.dylib 0x9002ba68 pthreadbody + 96
Thread 5:
0 libSystem.B.dylib 0x90054fc8 semaphoretimedwait_signaltrap + 8
1 libSystem.B.dylib 0x90071648 pthreadcond_timedwait_relativenp + 556
2 ...ple.CoreServices.CarbonCore 0x90bfbe90 TSWaitOnSemaphoreCommon + 176
3 ...ple.CoreServices.CarbonCore 0x90bfbce4 AsyncFileThread(void*) + 56
4 libSystem.B.dylib 0x9002ba68 pthreadbody + 96
Thread 0 crashed with PPC Thread State 64:
srr0: 0x0000000090002e84 srr1: 0x000000000000d030 vrsave: 0x0000000000000000
cr: 0x22004224 xer: 0x0000000020000004 lr: 0x0000000090002e28 ctr: 0x0000000000000002
r0: 0x0000000000000003 r1: 0x00000000bfffe2b0 r2: 0x0000000000000000 r3: 0x0000000000000100
r4: 0x00000000a0010270 r5: 0x0000000000000080 r6: 0x00000000ffffffff r7: 0x00000000445fa625
r8: 0x00000000000319c5 r9: 0x0000000000000000 r10: 0x0000000000000002 r11: 0x00000000bffffc30
r12: 0x0000000090002ee8 r13: 0x0000000000000001 r14: 0x000000000000079c r15: 0x0000000000000000
r16: 0x0000000006d4fa38 r17: 0x0000000000000021 r18: 0x0000000000000001 r19: 0x0000000000000000
r20: 0x0000000006a485b0 r21: 0x0000000006a36288 r22: 0x0000000006c8be10 r23: 0x0000000000000000
r24: 0x00000000a0000348 r25: 0x0000000000000000 r26: 0x0000000000000021 r27: 0x00000000bfffe410
r28: 0x00000000a00022a4 r29: 0x0000000008b502e0 r30: 0x00000000901a4d70 r31: 0x0000000090020df4
powerPC g4 1.25 - 10.4.6 - 2gb RAM Mac OS X (10.4)

If you have an app regularly crash, it's probably because there is something in the system that has changed that it doesn't like.
Your options here:
1) Run Disk Utility and repair permissions.
If that doesn't solve it
2) Go Back to 10.4.5 or
3) Upgrade to Photoshop CS2

How can I resize an image without losing resolution or using the crop tool? I am using Photoshop Elements 13 on a PC.

How can I resize an image without losing resolution or using the crop tool? I am using Photoshop Elements 13 on a PC.

Hi Peru Bob,
I've tried two images, the results were:
Image 1
Jpg, original file size 923KB, dimensions 848px x 279px.
After resizing to 848px x 180px with 72dpi, the file size decreased to 164KB.
Image 2
Jpg, original file size 809KB, dimensions 1200px x 1800px.
After resizing to 668px x 722px with 72dpi, the file size decreased to 307KB.
So, there seems to be a fair file size loss - is this to be expected?

Resizing tiff files without resample option in Photoshop SDK

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